CN103604492A - Ultrasonic frequency detection system and method of ultrasonic wave machining tool detection - Google Patents
Ultrasonic frequency detection system and method of ultrasonic wave machining tool detection Download PDFInfo
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Abstract
The invention discloses an ultrasonic frequency detection system of an ultrasonic wave machining tool. The ultrasonic frequency detection system comprises an upper computer and a lower computer. The lower computer comprises a microphone array, an analog signal matching and power amplifying module, an analog-to-digital conversion module, a signal processing module, a monitoring module, a data communication module and a power supply module. The microphone array is used for positioning a sound source and picking up an analog signal. The analog signal matching and power amplifying module is used for preprocessing the weak analog signal, namely, conducting transfer impedance matching and power amplifying on the analog signal. The analog-to-digital conversion module is used for converting the collected analog signal into a digital signal. The signal processing module is used for processing the digital signal and outputting the processing result. The monitoring module is used for conducting power amplification and speaker output after conducting analog-to-digital conversion on the processing result, and providing a circuit of monitoring signal for an operator. The data communication module is used for data communication between the upper computer, the lower computer and other peripherals. The power supply module is used for supplying multiple circuits of stable power so that the system can run normally.
Description
Technical field
The present invention relates to ultrasound wave processing technique field, be specifically related to a kind of ultrasonic frequency detection system and detection method thereof of ultrasonic wave processing cutting tool.
Background technology
Be accompanied by the innovation of new material technology, the application of ceramic new material is also developing rapidly, especially the application of hard brittle material pottery is also in continuous expansion, such as: oxide, nitride, carbide ceramics etc., they have all had more spacious wealthy application prospect.But the obstacle of these hard brittle material application developments of current obstruction is the manufacturing process for these material application, the mode of tradition processing hard brittle material is to grind and polishing, and the defect of this mode is that working (machining) efficiency is low, is difficult to working special-shaped workpiece.
Ultrasound wave processing is that a kind of utilization has loaded hyperacoustic main shaft or cutter, on processing work surface, forms ultrasonic resonance phenomenon, makes the finished surface fracture of workpiece, so that cutter is gone and removed again, reaches the object of machined surface machine cut.Ultrasound wave processing is the very favorable method that improves the especially superhard all kinds of ceramic working (machining) efficiencies of hard brittle material and means now.When the ultrasound wave hard crisp material grain of processing (silit, silicon nitride etc.), hyperacoustic processing effect key depends on the resonance size that ultrasound wave forms at surface of the work; Whether the size of this resonance is identical and definite by the material resonant frequency of ultrasound wave and workpiece to be machined; Therefore in selection and the processing of definite ultrasound wave, just become the key factor of ultrasound wave processing with material resonant frequency.
In ultrasound wave processing, because the ultrasonic resonance frequency of each rapidoprint and cutter generation is not identical, in order to reach best ultrasound wave processing effect, must select a most suitable ultrasonic resonance frequency to the cutter of processing and material.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of ultrasonic frequency detection system and detection method thereof of ultrasonic wave processing cutting tool.
Concrete solution of the present invention is as follows:
A ultrasonic frequency detection system for ultrasonic wave processing cutting tool, comprising: host computer and slave computer, and its feature is, described slave computer comprises:
Microphone module, for picking up of auditory localization and simulating signal;
Simulating signal coupling and power amplifier module, carry out the pre-service of transfer impedance coupling and power amplification for the simulating signal to faint;
Analog-to-digital conversion module, for converting the simulating signal of collection to digital signal;
Signal processing module, processes digital signal, output result;
Monitor module, for result is carried out, after digital-to-analog conversion, through power amplification and loudspeaker, export again, for operator provides a road monitoring signal;
Data communication module, for the data communication between slave computer and host computer and other peripheral hardwares.
Utilize described ultrasonic frequency detection system, realize the ultrasonic frequency detection method of ultrasonic wave processing cutting tool, its feature is, the method comprises the steps:
1. select one with the thin slice of material to be processed with material, the size of this thin slice tens to 100 millimeters square, thickness is less than 3 millimeters;
2. this thin slice be put in to the below of cutter and contact with the marginal surface of cutter, microphone array being placed in to the contact point place of workpiece to be processed and cutter;
3. open the ultrasonic frequency detection system of described ultrasonic wave processing cutting tool;
4. simulating signal coupling and power amplifier module receive the simulating signal of microphone array output, and carry out that transfer impedance is mated and the pre-service of power amplification after be transferred to analog-to-digital conversion module;
5. analog-to-digital conversion module will be transferred to signal processing module after simulating signal conversion digital signal;
6. signal processing module is processed digital signal, and signal processing results is inputed to data communication module;
7. monitor module by the output signal of signal processing module is carried out after digital-to-analog conversion, the signal after processing is exported by loudspeaker, for operator, monitor;
8. data communication module is transferred to host computer or other external units by signal processing results.
Ultrasound wave Cutters In Mc ultrasonic frequency is selected mostly with operating personnel's experience, to choose at present, the feel obtaining by modes such as touch workpiece determines, there is subjectivity and individual difference, and for the operative employee who lacks experience, correctly choose cutter frequency and there is difficulty, easily cause processing result cannot reach best.Beneficial effect of the present invention is: the method for processing by actual measurement and signal, quantize cutter frequency selection purposes foundation, in conjunction with sound equipment, process and assist, operator's vision and auditory perception are provided, effectively cutter frequency selection purposes process is simplified, guaranteed ultrasound wave secondary process best results.
Accompanying drawing explanation
Fig. 1 is slave computer module architectures schematic diagram in the present invention.
Fig. 2 is the graphical result of slave computer output in the embodiment of the present invention.
Fig. 3 is the use view of the ultrasonic frequency detection system of ultrasonic wave processing cutting tool of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail, the present embodiment is implemented take technical solution of the present invention under prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
A ultrasonic frequency detection system for ultrasonic wave processing cutting tool, comprising: host computer and slave computer.Host computer is comprised of the computer system that possesses network savvy, and the final graphicsization of being responsible for data analysis and testing result shows, and the overall coordination control of parameter configuration and exchanges data between a system module.
Slave computer is comprised of parts such as high-performance embedded processor, internal memory, input/output peripherals, in conjunction with embedded OS, form the embedded software hardware platform that volume is small and exquisite, performance is powerful, being applicable to very much the efficient data acquisition of field high-speed and analytical work, is the core component of this detection system.
Fig. 1 is slave computer module architectures schematic diagram in the present invention, and as shown in the figure, slave computer comprises with lower module:
Microphone array, for picking up of auditory localization and simulating signal.Microphone array, as the Sensor section of slave computer, is comprised of a plurality of directional microphones, coordinates the control of back-end processor, completes the work that auditory localization and useful signal pick up.During use, microphone array is placed on to the contact point place of workpiece to be processed and cutter, microphone array is connected with power amplifier module with the simulating signal coupling of slave computer by cable.The frequency response characteristic of microphone requires, below 10kHz, to select U.S. Lou Shi company product in the present embodiment.
Simulating signal coupling and power amplifier module, carry out the analog to digital conversion in the pre-service ，Wei Hou road of transfer impedance coupling and power amplification and prepare for the simulating signal to faint.
Analog-to-digital conversion module, for converting the simulating signal of collection to digital signal.In the present embodiment, adopt the low noise sound pitch Dynamic Data Acquiring card that is exclusively used in audio signal sample to possess USB interface simultaneously.
Signal processing module, is the core of slave computer, and Applied Digital signal processor DSP completes the complicated algorithm that the voice signal to gathering carries out, and finally exports result to data communication module.
Monitor module, the voice signal after this module is processed signal is exported through power amplification and loudspeaker after digital-to-analog conversion again, for operator provides a road monitoring signal.
Data communication module, supports the multiple communication interfaces such as USB, Ethernet, serial port, ensures the normal data communication of slave computer and host computer and other peripheral hardwares.
Supply module, is comprised of multi-channel A C-DC and DC-DC translation circuit, for system provides the Power supply that multichannel is stable, guarantees system normal operation.
Embodiment:
Test piece material: K9 glass;
Test piece size: bore 50mm, thickness 3mm;
Cutter ultrasonic sweep-frequency scope: 5KHz～50KHz;
1. select one with the thin slice of material to be processed with material, the size of this thin slice tens to 100 millimeters square, thickness is less than 3 millimeters; The test piece adopting in the present embodiment is K9 glass, and bore is 50mm, and thickness is 3mm.
2. this thin slice be put in to the below of cutter and contact with the marginal surface of cutter, by robotic arm or adsorbent equipment, microphone array is placed in to the contact point place of workpiece to be processed and cutter, microphone array output terminal connecting analog Signal Matching and power amplifier module, the signal of microphone collection transfers to PC with data mode the most at last; As shown in Figure 3.
3. open the ultrasonic frequency detection system of described ultrasonic wave processing cutting tool: (in the present embodiment, ultrasonic sweep-frequency scope is: 5KHz～50KHz)
4. simulating signal coupling and power amplifier module receive the simulating signal of microphone array output, and carry out being transferred to analog-to-digital conversion module after the pre-service of transfer impedance coupling and power amplification, analog-to-digital conversion module will be transferred to signal processing module after simulating signal conversion digital signal;
5. analog-to-digital conversion module will be transferred to signal processing module after simulating signal conversion digital signal;
6. signal processing module is processed digital signal, comprises that spectrum analysis, acoustical signal emittance are analyzed, data fitting.The present embodiment is final output with the pass of cutter ultrasonic frequency (horizontal ordinate) and clash signal emittance (ordinate), as shown in Figure 2.
Record cutter ultrasonic frequency f(kHz), cutter and workpiece clash first harmonic frequency F (Hz), clash normalized energy e(0～1).
By the method for data fitting, draw function analytic expression e=g(f, F), and study the characteristics such as this Experience about Monotonicity of Functions, extreme value and flex point, determine best operating point.
A. spectrum analysis: use Fast Fourier Transform (FFT) method, obtain clash first harmonic frequency, and harmonic energy.Specific implementation process is as follows:
1) cutter ultrasonic frequency is f(j) time, the time domain clash burst that microphone gathers: sj(n) carry out Fast Fourier Transform (FFT), obtain frequency domain sequence: (Re (i), Im (i)), (wherein Re (i) is real part, and Im (i) is imaginary part).And obtain spectral line energy: E (i)=root((Re (i)) ^2+(Im (i)) ^2);
2) E (i) is carried out to Gaussian function fitting, obtain first harmonic spectral line.Because distributing, E (i) meets Gaussian function f (x)=a*exp ((x-b) ^2/c), so, can obtain the analytic expression that E (i) distributes: E (i)=a*exp ((i-b) ^2/c) by the method for the curves such as least square, can be in the hope of according to the character of Gaussian function, at i=b place, be first harmonic spectral line.
3) clash signal first harmonic frequency is: F (j)=Fs*b/N, and wherein, Fs is sample frequency, N is FFT exponent number.
B. acoustical signal emittance is analyzed:
Cutter ultrasonic frequency is f(j) time, cutter and workpiece clash signal emittance: E (j)=a*exp (1/c), thereby obtain corresponding relation (f (j), E (the j)) sequence of cutter ultrasonic frequency and clash signal emittance.
C. data fitting: by the method for Gaussian function fitting, obtain the analytic expression of clash energy: e=g(f, F), (wherein, e is clash normalized energy, and f is cutter ultrasonic frequency, and F is cutter and workpiece clash first harmonic frequency).Utilize tangent method or Gaussian processes calculating energy extreme point simultaneously, and find corresponding cutter ultrasonic frequency at energy Near The Extreme Point.
7. monitor module by the output signal of signal processing module is carried out after digital-to-analog conversion, the signal after processing is exported by loudspeaker, for operator, monitor;
8. data communication module is transferred to host computer or other external units by signal processing results.As shown in Figure 2, in the present embodiment, best ultrasonic frequency appears at figure peak value: 29.57KHz place.
After measurement and signal processing, by slave computer, export final graphical result, transfer to host computer and show, as shown in Figure 2.The clash producing in cutter ultrasound wave frequency-selecting process is carried out to necessary sound equipment processing exports by loudspeaker simultaneously;
Measurement result is analyzed: best cutter ultrasonic frequency appears at the maximum extreme value annex of image, and in the present embodiment, best ultrasonic frequency is 29.57KHz.
The results showed, the method that the present invention processes by actual measurement and signal, quantize cutter frequency selection purposes foundation, in conjunction with sound equipment, process auxiliary, operator's vision and auditory perception are provided, effectively cutter frequency selection purposes process are simplified, according to function characteristic analysis and the position analysis of energy extreme point of clash energy resolved formula, draw the most probable distribution range of optimum processing frequency, thereby instruct ultrasound wave machining center operating personnel to determine cutter ultrasonic frequency.
Claims (2)
1. a ultrasonic frequency detection system for ultrasonic wave processing cutting tool, comprising: host computer and slave computer, it is characterized in that, and described slave computer comprises:
Microphone array, for picking up of auditory localization and simulating signal;
Simulating signal coupling and power amplifier module, carry out the pre-service of transfer impedance coupling and power amplification for the simulating signal to faint;
Analog-to-digital conversion module, for converting the simulating signal of collection to digital signal;
Signal processing module, processes digital signal, output result;
Monitor module, for result is carried out, after digital-to-analog conversion, through power amplification and loudspeaker, export again, for operator provides a road monitoring signal;
Data communication module, for the data communication between slave computer and host computer and other peripheral hardwares;
Supply module, provides the Power supply that multichannel is stable, insurance system normal operation.
2. utilize the ultrasonic frequency detection system described in claim 1, realize the ultrasonic frequency detection method of ultrasonic wave processing cutting tool, it is characterized in that, the method comprises the steps:
1. select one with the thin slice of material to be processed with material, the size of this thin slice tens to 100 millimeters square, thickness is less than 3 millimeters;
2. this thin slice be put in to the below of cutter and contact with the marginal surface of cutter, microphone array being placed in to the contact point place of workpiece to be processed and cutter;
3. open the ultrasonic frequency detection system of described ultrasonic wave processing cutting tool;
4. simulating signal coupling and power amplifier module receive the simulating signal of microphone array output, and carry out that transfer impedance is mated and the pre-service of power amplification after be transferred to analog-to-digital conversion module;
5. analog-to-digital conversion module will be transferred to signal processing module after simulating signal conversion digital signal;
6. signal processing module is processed digital signal, and signal processing results is inputed to data communication module;
7. monitor module by the output signal of signal processing module is carried out after digital-to-analog conversion, the signal after processing is exported by loudspeaker, for operator, monitor;
8. data communication module is transferred to host computer or other external units by signal processing results.
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Cited By (6)
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| CN105281590A (en) * | 2015-11-09 | 2016-01-27 | 江南大学 | Ultrasonic frequency detection method of ultrasonic biological treatment |
| TWI566062B (en) * | 2015-04-02 | 2017-01-11 | Numerical control processing machine and ultrasonic knife to the combination of control devices | |
| US9956661B2 (en) | 2014-11-20 | 2018-05-01 | Industrial Technology Research Institute | Feedback control numerical machine tool and method thereof |
| CN109308047A (en) * | 2018-12-12 | 2019-02-05 | 蓝思科技（长沙）有限公司 | Utilize the system and method for numerically-controlled machine tool regulation ultrasonic wave secondary process |
| CN110928830A (en) * | 2019-12-04 | 2020-03-27 | 能科科技股份有限公司 | Data acquisition method and device, computer equipment and storage medium |
| CN112075973A (en) * | 2020-08-08 | 2020-12-15 | 双典医疗科技(深圳)有限公司 | Ultrasonic osteotome dynamic impedance feedback method |
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| US9956661B2 (en) | 2014-11-20 | 2018-05-01 | Industrial Technology Research Institute | Feedback control numerical machine tool and method thereof |
| TWI566062B (en) * | 2015-04-02 | 2017-01-11 | Numerical control processing machine and ultrasonic knife to the combination of control devices | |
| CN105281590A (en) * | 2015-11-09 | 2016-01-27 | 江南大学 | Ultrasonic frequency detection method of ultrasonic biological treatment |
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| CN112075973A (en) * | 2020-08-08 | 2020-12-15 | 双典医疗科技(深圳)有限公司 | Ultrasonic osteotome dynamic impedance feedback method |
| CN112075973B (en) * | 2020-08-08 | 2021-10-22 | 双典医疗科技(深圳)有限公司 | Ultrasonic osteotome dynamic impedance feedback method |
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Application publication date: 20140226 |