CN103399512B - Dual display intelligent vibration ageing controller - Google Patents
Dual display intelligent vibration ageing controller Download PDFInfo
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- CN103399512B CN103399512B CN201310341268.7A CN201310341268A CN103399512B CN 103399512 B CN103399512 B CN 103399512B CN 201310341268 A CN201310341268 A CN 201310341268A CN 103399512 B CN103399512 B CN 103399512B
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Abstract
The present invention relates to a kind of dual display intelligent vibration ageing controller, it includes cabinet, printer, operated key and mainboard, it is characterised in that: described cabinet is provided with LCDs, numerical monitor window, shift key;Described cabinet is provided with tach signal interface, acceleration of vibration interface, amplitude signal interface, current and voltage signals interface, printer access chip microprocessor by interface circuit respectively;Described mainboard is provided with chip microprocessor, memorizer, electric charge amplification control circuit, serial port drive circuit, interface circuit, and described operated key, memorizer are connected with chip microprocessor port;Described chip microprocessor is connected with electric charge amplification control circuit, serial port drive circuit respectively by interface circuit;Described electric charge amplification control circuit accesses LCDs by shift key, and serial port drive circuit connects numerical monitor window.The present invention, by numerical monitor, liquid crystal display screen display Workpiece vibration waveform and process data, prints whole process curves and parameter in ag(e)ing process.
Description
Technical field
The present invention relates to a kind of oscillating aging and control technical field, concretely relate to the intelligent type vibration aging controller of a kind of double aobvious several operated keys.
Background technology
Vibration Aging Process is that the rotation of the vibrator that the control system control by vibratory equipment is linked in workpiece makes workpiece be forced vibration, that the dynamic stress of workpiece forced vibration superposes with workpiece residual stress and exceed a certain limit, make workpiece generation micro-plastic deformation, reduce or the residual stress of homogenizing inside workpiece, make workpiece size tend towards stability, reach precision prescribed.General Oscillation timeliness is to be securely clamped in the motor with eccentric to be shaken on workpiece, being rotated by motor band movable eccentric wheel, the workpiece that makes to be shaken vibrates 20 to 30 minutes under its natural frequency, and produces micro-plastic deformation, release residual stress, prevents the technology of stress deformation.Oscillating aging is compared with heat aging, and not only effect is identical, also has low cost, energy-saving and environmental protection, process facilitate the plurality of advantages such as rapid, therefore suffer from the most attention of people.
Conventional oscillating aging equipment is made up of vibrator, fixture, vibration aging controller, printer, acceleration transducer etc..Wherein, vibration aging controller is the core component of the said equipment, and it typically uses microcomputer to be controlled.But existing micro computer vibration aging controller is the most poor to analyzing and processing ability and the real-time control capability of data, and its operation interface, good in interactive function be not strong, and working procedure is few.
Find by the existing patented technology about oscillating aging is retrieved, in disclosed patent application, as Chinese patent " a kind of spectral analysis peak-determination method for oscillating aging (Publication No. CN1865886) " is disclosed that, workpiece forced vibration accekeration is carried out spectral analysis peak-determination method;Chinese patent " carries out the method (Publication No. CN1546973) of oscillating aging and strain detecting, is then to solve same oscillating aging equipment to be not directly detected dynamic strain amplitude and phase place, dynamic stress value, residual stress release value and the problem of residual stress relief ratio of processed workpiece workpiece.As can be seen here, above-mentioned patent is directed primarily to the improvement to vibration stress relief treatment method, and is not specifically related to the operator scheme to the vibration aging controller that oscillating aging quality plays a crucial role, the improvement of hardware performance.
Chinese patent " can the method for remotely real-time monitoring vibratory stress relief process and device (Publication No. CN100478817C) thereof " the open a kind of vibration ageing device being is by the host computer control parameter during oscillating aging, measured workpiece kinetic parameter and operating process parameter, long-range long-distance monitorng device it is transmitted to after process, long-distance monitorng device is by display record after this signal processing, operator, according to shown data, can adjust the work of host computer control parameter in real time by long-distance monitorng device.
Therefore, during site operation, existing timeliness equipment is poor to the suitability of workpiece, it is impossible to do adjustment in real time according to size, the character of workpiece.On the other hand, existing oscillating aging equipment, the structure of its circuit such as unidirectional current machine speed control and signal sampling is complicated, and the combination between each system is the compactest thus be easily disturbed and cause the rotary speed unstabilization of direct current generator, and these impacts are apparent from;Micro computer vibration aging controller is the most poor to analyzing and processing ability and the real-time control capability of data, and operation interface, good in interactive function is the strongest, it is achieved monitoring capacity is poor, and this is to need to improve.
Summary of the invention
The purpose of the present invention is contemplated to solve existing vibration aging technology and has that operation interface function is strong, working procedure is few, poor to the adaptability of workpiece, timeliness can not be made according to the size of workpiece, material to adjust, and the technical problems such as all kinds of vibration datas can not be exported in real time, there is provided a kind of and the amplitude of monitoring vibration acceleration in real time can carry out Ageing Treatment, vibration eliminates inside workpiece residual stress, shows Workpiece vibration waveform and the dual display intelligent vibration ageing controller of process data by numerical monitor and liquid crystal display screen.
It is a further object to provide a kind of double aobvious vibration aging controller and be provided with multi-functional operation key and shift key, during oscillating aging and changeable show valid value, peak value, amplitude truly hardware aged directly perceived, print in ag(e)ing process all process curves and parameter.
The technical solution adopted in the present invention is: a kind of dual display intelligent vibration ageing controller, and it includes cabinet, printer, operated key and mainboard, it is characterised in that: described cabinet is provided with LCDs, numerical monitor window, shift key;Described cabinet is provided with tach signal interface, acceleration of vibration interface, amplitude signal interface, current and voltage signals interface, printer;
Described mainboard is provided with chip microprocessor, memorizer, electric charge amplification control circuit, serial port drive circuit, interface circuit, and described operated key, memorizer are connected with the I/O port of chip microprocessor;Described tach signal interface, acceleration of vibration interface, amplitude signal interface, current and voltage signals interface, printer access chip microprocessor by interface circuit respectively;
Described chip microprocessor is connected with electric charge amplification control circuit, serial port drive circuit respectively by interface circuit;Described electric charge amplification control circuit is connected with shift key, and shift key connects LCDs, and serial port drive circuit connects numerical monitor window.
On the basis of technique scheme, further technical scheme is:
Described tach signal interface speed probe is produced light pulse signal through LM353, LM331 voltage-frequency change after export to chip microprocessor AT89S5224PU, 74HC4020,62256, thus complete signal processing.
Described acceleration of vibration interface by piezoelectric transducer alternating signal through LM353, LM331 voltage-frequency change after export to chip microprocessor AT89S5224PU, 74HC4020,62256, thus complete signal processing.
Described current and voltage signals interface by voltage, current signal via LM725, LM331 voltage-frequency change after export to chip microprocessor AT89S5224PU, 74HC4020,62256, thus complete signal processing.
Described electric charge amplification control circuit includes charge amplifier, panel, supply module, charge amplifier is connected with panel, panel outfan connects shift key, workpiece amplitude transducing signal is delivered to charge amplifier, data signal is converted frequency signals into by panel, being inputted LCDs by shift key, supply module transfers alternating current power supply to DC source provides power supply for LCDs.
Described shift key is made up of three function keys, respectively waveform, peak value, reset key, and waveform key S1 is that Wave data shows key, and peak value key S2 is for adjusting waveform amplification amplitude key, and reset key S3 is reset reset key.
Described serial port drive circuit includes get started 74HC08 chip, driving 74HC164 chip, rotating speed is changed signal, amplitude sensing and transducing signal, current/voltage conversion signal output to interface circuit by chip microprocessor outfan respectively, the most respectively through optocoupler TIL117 to serial port drive circuit, driven digital luminescent diode display reading numeral by 74HC164, voltage, electric current, time, technique, rotating speed are exported respectively to numerical monitor window.
The technique scheme of the present invention, has the advantage that
1, dual display intelligent vibration ageing controller of the present invention is provided with numerical monitor window and LCDs shows Workpiece vibration waveform and process data automatically, automatically material, component rigidity are identified, the amplitude versus metal component of monitoring vibration acceleration carries out Ageing Treatment in real time, numeral and liquid crystal display screen directly apply to the amplitude of true monitoring vibration acceleration in hardware vibration processes, and vibration eliminates in inside workpiece residual stress technique.
2, dual display intelligent vibration ageing controller of the present invention is by being provided with tach signal interface, acceleration of vibration interface, amplitude signal interface, current and voltage signals interface, printer on cabinet, by workpiece amplitude transducing signal, amplitude, voltage and current signal and rotating speed sampled signal, single-chip microcomputer it is transferred to respectively by interface circuit, completed signal processing by single-chip microcomputer, complete from motion tracking and monitor hardware Ageing Treatment.
3, electric charge amplification control circuit it is provided with on mainboard in vibration aging controller of the present invention, realized being provided as LCDs by supply module and DC source is provided, charge amplifier is connected with panel, panel outfan connects shift key, workpiece amplitude transducing signal is delivered to charge amplifier, data signal is converted frequency signals into by panel, LCDs is inputted by shift key, hardware can be monitored by LCDs and move the amplitude of acceleration, simultaneously, by the shift key arranged and operated key, realize waveform, peak value, reset three power and energy, during oscillating aging and changeable show valid value, peak value, amplitude truly hardware aged directly perceived.
4, due to the fact that and be provided with serial port drive circuit, the rotating speed electricity conversion signal of chip microprocessor output, amplitude sensing and transducing signal, current/voltage conversion signal, serial ports drive circuit is inputted by optocoupler TIL117, digital luminescent diode is driven by 74HC164, voltage, electric current, time, technique, rotating speed reading numerical monitor window are shown, numerical monitor is accurate, makes vibration aging controller possess double display function.
5, dual display intelligent vibration ageing controller of the present invention is provided with printer on cabinet, whole process curves and parameter in printing ag(e)ing process, true at a distance can monitor hardware aged intuitively, in real time.
Accompanying drawing explanation
The casing structure schematic diagram of Fig. 1 present invention.
The circuitry block road of Fig. 2 present invention.
The LCDs electric charge amplification control circuit block diagram of Fig. 3 present invention.
1-liquid shows display screen;2-numerical monitor window;3-operated key;4-shift key;5-tach signal interface;6 acceleration of vibration interfaces;7 amplitude signal interfaces;8-current and voltage signals interface;9-cabinet;10-printer.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in more detail.
As shown in Fig. 1,2,3, dual display intelligent vibration ageing controller is constituted complete machine by controller, mainboard, numerical monitor window 2, LCDs 1 with operated key 3 and shift key 4.
Mainboard constitutes emblem computer system with AT89S5224PU, 74HC4020,62256 for core, wherein has enumerator, extension counter, phase-locked loop circuit, duobinary system enumerator, internal storage capacity.
Digital displaying window derives from AT89S5224PU, 74HC4020,62256 Serial Port Control plate, totally 14 Digital sum pipe.
LCDs shows for virtual value, amplitude, vibrational waveform, and intuitively shows Workpiece vibration situation.Input amplitude signal: YD 1 type piezoelectric acceleration sensor, measures frequency range: the corresponding 5V} of 0 one 5{, output frequency signal: 0 one 5V exchange { single peak }, vibration frequency range: 10HZ mono-500HZ can show acceleration of vibration single peak and virtual value.
Operated key: 1) operated key is 0-9, separately has a speed governing/regularly, technique, monitoring/preset, fixed frequency/-, constant speed-.2) numbering, 1 key, has concurrently automatically, and 1 key has printing concurrently, and 2 keys have operation concurrently, and 3 keys have stopping concurrently, and 4 keys have reduction of speed concurrently, and 5 keys have scanning concurrently, and 6 keys have timeliness concurrently, and 7 keys have raising speed concurrently, and 8 keys have h/f concurrently, and 9 keys have U/I concurrently;Keyboard is made up of numeral keys arranged in arrays and function key, and described numeral keys is 0-9 number key, and function key has adjustment key, technique key, constant speed key, fixed frequency key, five keys of monitor key.
Casing structure schematic diagram such as Fig. 1 present invention.Including cabinet 9, printer 10, mainboard 11, it is provided with mainboard in cabinet 9, cabinet 9 is provided with LCDs 1, numerical monitor window 2, operated key 3 and shift key 4, and cabinet 9 is additionally provided with tach signal interface 5, acceleration of vibration interface 6, amplitude signal interface 7, current and voltage signals interface 8, printer 10.
Circuitry block road such as Fig. 2 present invention.Being provided with mainboard 11 in controller box 10, mainboard is provided with chip microprocessor, memorizer, electric charge amplification control circuit, serial port drive circuit, interface circuit, and operated key, memorizer and is connected with the I/O port of chip microprocessor;Tach signal, current and voltage signals, Workpiece vibration acceleration signal, amplitude signal access chip microprocessor by interface circuit respectively, and printer accesses chip microprocessor;Chip microprocessor is connected with electric charge amplification control circuit, serial port drive circuit respectively by interface circuit;Electric charge amplification control circuit is connected with shift key 4, and shift key 4 connects LCDs 1, and serial port drive circuit connects numerical monitor window 2.
Speed probe is produced light pulse signal and is exported after LM353, LM331 voltage-frequency is changed to chip microprocessor AT89S5224PU, 74HC4020 by 60 tooth CDs and light sensor of leaping up, 62256 completes signal processing by tach signal interface;Acceleration piezoelectric transducer self-priming is on metal works, resonance will be produced when inherent frequency of workpiece gives frequency resonance with this Ore-controlling Role, piezoelectric transducer alternating signal is exported after LM353, LM331 voltage-frequency is changed to chip microprocessor AT89S5224PU, 74HC4020,62256 completes signal processing by acceleration of vibration interface;Current and voltage signals interface 9 by voltage, current signal via LM725, export to chip microprocessor AT89S5224PU, 74HC4020 after the conversion of LM331 voltage-frequency, 62256 complete signal processing, wherein, voltage sample is by 150K resistance, 12V, 0.5W Zener diode, sample from drive circuit and change through LM331 voltage-frequency, electric current sample concatenates the sampling of 75mV diverter from drive circuit, exports to chip microprocessor after LM725, LM331 carry out voltage-frequency conversion;Vibration wave signal is inputted chip microprocessor by interface circuit by amplitude signal interface, chip microprocessor complete the conversion of amplitude waveform, and virtual value peak value shows, surveys Workpiece vibration state directly perceived.
Wherein, described serial port drive circuit is that rotating speed is changed signal, amplitude sensing and transducing signal, current/voltage conversion signal output to interface circuit by chip microprocessor outfan respectively, the most respectively through optocoupler TIL117 to serial port drive circuit introduction 74HC08 chip, drive 74HC164 chip, by driving 74HC164 chip drives digital luminescent diode display reading numeral, by voltage, electric current, time, technique, rotating speed output to numerical monitor window, serial port drive circuit is driven motor by MTCTT40A/1200V silicon controlled module.
LCDs electric charge amplification control circuit block diagram such as Fig. 3 present invention.Electric charge amplification control circuit includes charge amplifier, panel, supply module, charge amplifier is connected with panel, panel outfan connects shift key, workpiece amplitude transducing signal is delivered to charge amplifier, data signal is converted frequency signals into by panel, being inputted LCDs by shift key, supply module transfers alternating current power supply to DC source provides power supply for LCDs;Changing in panel and be good for as touch button, changeable display screen display amplitude waveform, peak value waveform, resetting resets, and the strong S1 of conversion shows amplitude waveform, in panel, conversion strong S2 sample interval adjusts, changing amplification, adjust wave-shape amplitude, reset reset key S3 is that the cleaning of reset high level mess code occurs.
Above-described embodiment is used for the present invention is described, is not limitation of the invention.
Claims (7)
1. a dual display intelligent vibration ageing controller, it includes cabinet, printer, operated key and mainboard, it is characterised in that: described cabinet is provided with LCDs, numerical monitor window, shift key;Described cabinet is provided with tach signal interface, acceleration of vibration interface, amplitude signal interface, current and voltage signals interface, printer;
Described mainboard is provided with chip microprocessor, memorizer, electric charge amplification control circuit, serial port drive circuit, interface circuit, and described operated key, memorizer are connected with the I/O port of chip microprocessor;Described tach signal interface, acceleration of vibration interface, amplitude signal interface, current and voltage signals interface, printer access chip microprocessor by interface circuit respectively;
Described chip microprocessor is connected with electric charge amplification control circuit, serial port drive circuit respectively by interface circuit;Described electric charge amplification control circuit is connected with shift key, and shift key connects LCDs, and serial port drive circuit connects numerical monitor window.
A kind of dual display intelligent vibration ageing controller, it is characterized in that: speed probe is produced light pulse signal through LM353 by described tach signal interface, LM331 voltage-frequency conversion after export to chip microprocessor AT89S5224PU, 74HC4020,62256, thus complete signal processing.
A kind of dual display intelligent vibration ageing controller, it is characterized in that: described acceleration of vibration interface by piezoelectric transducer alternating signal through LM353, LM331 voltage-frequency conversion after export to chip microprocessor AT89S5224PU, 74HC4020,62256, thus complete signal processing.
A kind of dual display intelligent vibration ageing controller, it is characterized in that: described current and voltage signals interface by voltage, current signal via LM725, LM331 voltage-frequency conversion after export to chip microprocessor AT89S5224PU, 74HC4020,62256, thus complete signal processing.
A kind of dual display intelligent vibration ageing controller, it is characterized in that: described electric charge amplification control circuit includes charge amplifier, panel, supply module, charge amplifier is connected with panel, panel outfan connects shift key, workpiece amplitude transducing signal is delivered to charge amplifier, being converted frequency signals into data signal by panel, shift key input LCDs, supply module transfers alternating current power supply to DC source provides power supply for LCDs.
6. according to dual display intelligent vibration ageing controller a kind of described in claim 1 or 5, it is characterized in that: described shift key is made up of three function keys, it is respectively waveform key S1, peak value key S2, reset key S3, waveform key S1 is that Wave data shows key, peak value key S2 is for adjusting waveform amplification amplitude key, and reset key S3 is reset reset key.
A kind of dual display intelligent vibration ageing controller, it is characterized in that: described serial port drive circuit includes get started 74HC08 chip, driving 74HC164 chip, rotating speed is changed signal, amplitude sensing and transducing signal, current/voltage conversion signal output to interface circuit by chip microprocessor outfan respectively, export to serial port drive circuit through optocoupler TIL117 the most respectively, driven digital luminescent diode display reading numeral by 74HC164, voltage, electric current, time, technique, rotating speed are exported respectively to numerical monitor window.
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CN105463180B (en) * | 2015-12-29 | 2017-11-28 | 共享铸钢有限公司 | A kind of casting vibration stress-removal system and its vibration stress-removal method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1546973A (en) * | 2003-11-28 | 2004-11-17 | 汤小牛 | Method of vibration aging and strain detection for workpiece |
CN101234665A (en) * | 2008-03-03 | 2008-08-06 | 中国科学院光电技术研究所 | Small-size underwater observation robot |
CN201109789Y (en) * | 2007-05-10 | 2008-09-03 | 肖维鑫 | Intelligent vibration aging controller with fifteen operational keys |
CN101685678A (en) * | 2008-09-27 | 2010-03-31 | 中国核动力研究设计院 | Vibration monitoring system of reactor and reactor internals |
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JP2006084371A (en) * | 2004-09-17 | 2006-03-30 | Kobe Steel Ltd | Loss factor measuring device |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1546973A (en) * | 2003-11-28 | 2004-11-17 | 汤小牛 | Method of vibration aging and strain detection for workpiece |
CN201109789Y (en) * | 2007-05-10 | 2008-09-03 | 肖维鑫 | Intelligent vibration aging controller with fifteen operational keys |
CN101234665A (en) * | 2008-03-03 | 2008-08-06 | 中国科学院光电技术研究所 | Small-size underwater observation robot |
CN101685678A (en) * | 2008-09-27 | 2010-03-31 | 中国核动力研究设计院 | Vibration monitoring system of reactor and reactor internals |
Non-Patent Citations (1)
Title |
---|
SHX2106型全自动彩屏振动时效仪的研制与开发;杨胜峰等;《装备制造技术》;20120131;第1~5以及第13页 * |
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