CN2478196Y - Intelligent teaching test dynamic balancing machine - Google Patents
Intelligent teaching test dynamic balancing machine Download PDFInfo
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- CN2478196Y CN2478196Y CN 01213136 CN01213136U CN2478196Y CN 2478196 Y CN2478196 Y CN 2478196Y CN 01213136 CN01213136 CN 01213136 CN 01213136 U CN01213136 U CN 01213136U CN 2478196 Y CN2478196 Y CN 2478196Y
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Abstract
The utility model discloses to a dynamic balancing machine for the intelligent teaching experiment which comprises an electric testing cabinet and a tool body of the balancing machine, wherein the electric cabinet is composed of an active electric power sensor, a photo-electric sensor, a computer processing system and a amplitude-limit rectifying circuit, a phase lock and multiple frequency circuit, pre-posed processor, a tracing filter, an AGC circuit and an ADC circuit; and the tool body of the balancing machine is composed of a base, a pair of semi-rigid supporting oscillating rack and an electric motor and has a plurality of setting functions including the dynamic/static balance and rigid/soft supporting balance. The volume is small and the use is safe and reliable, so that the student can operate manually. Through experiment, the student has a compete and in-depth understanding about current dynamic balance technique.
Description
The utility model relates to the digitized teaching experimental equipment of a kind of microelectric technique, a kind of specifically intelligent tutoring dynamic balancing machine.
Particularly thorny between state Inner dynamic balancing measurement technological means and the dynamic balancing measurement engineering demand at present.On the one hand the rotating speed of all kinds of rotating machineries more and more higher, reach tens thousand of and even ten tens thousand of r/min, overcritical and even super second order, the critical flex rotor in three rank are much seen in engineering, the large high-speed complex apparatus proposes many new problems to the dynamic balancing measurement technology, the low vibration of industry and household appliances and low noise index all require dynamic balance accuracy to improve constantly, light lesser trochanter such as military project, frame often only allow several milligrams in addition zero point several milligrams remaining amount of unbalance; The dynamic balancing measurement technological means of state Inner still is in three levels that rely on the other hand: dependence outdated equipment, dependence experience are groped, dependence on import.And the experiment of dynamic balancing of specialties such as each colleges and universities' machinery, power, the energy, electromechanics is levied employed equipment, is original mechanical type dynamic balancing machine or is the industrial dynamic balancing machine of general hard supporting.The far incompatible teaching of the former outmoded backwardness needs, latter's function singleness, cost an arm and a leg, the installation requirement height, can't extensively popularize in the laboratory, only can visit demonstration for the student.Single hard supporting functions also only is suitable for the low speed balancing rigid rotator, and the balance method of the high speed, high precision and the supercritical rotor that day by day generally use on the current engineering and spot dynamic balance method can not be by experiment to student's demonstrations, can not popularize can't allow everybody hands-on of student deepen the impression certainly and understand.
At the problems referred to above, the purpose of this utility model, be that design a kind ofly can contain that the hard supporting of lid dynamic balancing measurement pattern can be simulated again at a high speed, accurate soft underprop measurement pattern can also be independently carries out on-the-spot overall dynamic-balance, multiple functional, cheap intelligent education experiment dynamic balancing machine to rigidity or flex rotor, be easy to teaching and universal, current dynamic balancing technique had a understanding deep than complete sum in the hope of making the student by experiment.
To achieve these goals, the technical scheme that the utility model is taked is: microelectric technique and mechanical technique are organically combined, design a kind of intelligent tutoring experiment dynamic balancing machine.This machine comprises that electrical measurement case 1 and balance bed piece two large divisions form, and are characterized in: the electrical measurement case is to be connected with computer digit disposal system, limiter shaping circuit, phase locking frequency multiplying circuit, preprocessor, tracking filter, agc circuit, adc circuit etc. by casing and a pair of active piezoelectric force transducer 4, photoelectric sensor 6 on being arranged on the equilibrator lathe bed to constitute; The equilibrator lathe bed is made up of base 2, a pair of semihard supporting rocking carrier 3, motor 5, switch knob 8,9, pilot lamp 10.
Another characteristics of the present utility model are: active pressure transducer is sent the signal that receives into preprocessor, and signal input tracking filter is after treatment formed left and right vibration signal passage with agc circuit; Photoelectric sensor is formed reference channel signal with signal input saturation shaping circuit and phase locking frequency multiplying circuit; Vibration signal passage input adc circuit converts digital quantity to and imports by the 89C51 single-chip microcomputer with the signal reference channel to be core, to dispose in the computer digit disposal system of keyboard interface, expansion ROM, RAM, expanding printing interface and light-emitting diode display.
Owing to adopted the combination of microelectric technique and mechanical technique with the utility model, topmost characteristics are can realize supporting firmly dynamically balanced A without adjusting on the frame of a semihard supporting, B, the C size is resolved with the influence coefficient method of soft underprop and is resolved, both can carry out dynamic balance calibration and also can carry out the static equilibrium correction, have the required various functions of transient equilibrium education experiment, make the cost of this equilibrator greatly reduce from the intelligentized design of software replace hardware, become possibility thereby the experiment of dynamic balancing teaching is popularized.
Fig. 1 is a structure diagram of the present utility model;
Fig. 2 is a test macro block diagram of the present utility model;
Fig. 3 is the schematic diagram of vibrating channel;
Fig. 4 is the electrical schematic diagram of reference channel signal;
Fig. 5 is the computer processing system electrical schematic diagram;
Fig. 6 is the electrical schematic diagram of keyboard and display.
Below in conjunction with drawings and Examples the utility model is described further.
Referring to Fig. 1, Fig. 2.A pair of semihard bearing support 3 is installed on the base 2 of equilibrator lathe bed of the present utility model, a pair of active piezoelectric force transducer 4 is installed on the semihard bearing support, fixed motor 5 and photoelectric sensor 6 on the base 2, vibration damping base 7 is housed under the base, and the driving belt of motor 5 is connected with measured workpiece 11 and is placed on the hard bearing support 3; The signal of two active piezoelectric force transducers is connected to the input end of the amplitude limit adjustment circuit on the electrical measurement case 1, its output terminal is connected the input end of preposing signal process circuit, the output terminal of preposing signal process circuit is connected on the input end of tracking filter, and its output terminal is connected on the input end of agc circuit and forms left and right vibration signal passage; The signal of photoelectric sensor is connected to the input end that amplitude limit is adjusted circuit, and the output terminal that amplitude limit is adjusted circuit links to each other with the phase locking frequency multiplying circuit, forms reference channel signal jointly; The output terminal of two-way vibration signal passage enters adc circuit and is converted into digital quantity, importing with the 89C51 single-chip microcomputer together with the signal reference channel is core, disposes in the computer digit disposal system of keyboard interface, expansion ROM, RAM, expanding printing interface and light-emitting diode display.
Referring to Fig. 3.Amplifier U1 and peripheral cell R1-R5 thereof and C1, C2 constitute the preposing conversion level, are used for the quantity of electric charge of sensor output is transformed into voltage.R1, R2 and R3 are connected into T type network, and the enough big equivalent transfer impedance that its purpose is to obtain G Ω level by low resistance is avoided noise and the drift of using high value resistor to cause to guarantee the LF-response of circuit.The introducing of C2 can suppress the drift of sensor output, and circuit at the corresponding levels has the gain of 20dB.
U2A, U3 and peripheral cell R6-R12 form automatic gain control circuit (AGC), and obviously this circuit comes down to a gain-programmed amplifier.The amplitude size of sampling moment CPU automatic judgment signal is also sent two steering order sign indicating numbers changing 4051 gating end, the access of decision R8, R9, R10 or R1 to this circuit in view of the above, thereby changes the gain of circuit automatically.4051 connection can guarantee that the bipolarity simulating signal passes through, and two control codes can realize 4 kinds of gains.CPU writes out 4 gain codes altogether and controls left and right passage respectively during sampling, to guarantee suitable sampled level.The sufficient follower circuit of U2B (second half of TL072), to the output of U2A carry out buffer compartment from.
U4 is that the MF10 monolithic amasss into switching capacity filter, and this chip is omnipotent wave filter, has multiple mode of operation, realizes tracking filter by clock signal clk control.The connection of MF10 and outer meeting resistance R15-R22 thereof makes this circuit work under high and low logical integrated mode, and compound formation fourth-order band-pass wave filter in order to improve signal to noise ratio (S/N ratio), is finished the once per revolution vibration component extraction jointly with the correlation filtering module of software.The vibration signal that sensor comes is isolated output by U5 behind pre-process, agc circuit, tracking filter.
Referring to Fig. 4.U6, R28, R29, R30 constitute comparator circuit, are used for that the reference signal that photoelectric sensor comes is carried out shaping and handle.R26 and R27 be to supply voltage dividing potential drop decision comparison threshold, and R32, R34 and D3 are used for amplitude limit and signal polarity protection.Luminotron D2 is comparer work prompting.
Integrated digital phaselocked loop 4046 (U7) 4040 (U8) constitutes the phase locking frequency multiplying circuit, the low side frequency of outward element R36, R33, C4 and the common decision-making circuit of C5, output signal CLK is used as the work clock of MF10 on the one hand, input to computing machine simultaneously with the CLKA signal on the other hand, finish tachometric survey and phase measurement by software.
Fig. 5 is the schematic circuit of computer processing system, and it is to be the Single Chip Microcomputer (SCM) system of core formation with U9 (89C51).The P00-P07 of U9 is the data bus of system, and the least-significant byte address of system is latched by U10 (74LS373), and the most-significant byte address is P20-P27.The P1 mouth of U9 (low 4) is as agc circuit control mouth, and gain control is write out by the whole byte of this mouthful.System extension a slice ROM (U12 27256) and a slice RAM (U11 6264).U13 (8155) is a keyboard interface.U14 (8255) is the A/D converter interface, and the PA mouth of U14 is a data port, and the PB mouth is as the control mouth, and PC0 is as left and right passage switching controls usefulness, and left and right passage timesharing is integer-period sampled.
U17 (74LS138), U18 (74LS245) decoding that is display interface device U17 to address A3, A4 forms three gating signals (DISCS1, DISCS2, DISCS3) and is used for three address fields of gating display board, with low three bit address A[0...2] each word bit, the font sign indicating number of common gating display board then be by the DD[0..7 of data bus after the U18 buffering] write out.
U19A, U19B, R37, R38 and E1 constitute reset circuit, and manual reset is linked to each other with reset key on the finger-board via socket CT-1 by RST.
U16B is compound as read signal the 29th pin of U9 and the 17th pin, and system adopts ROM, RAM, port unified addressing, and Senior Three bit address (A13, A14, A15) is deciphered as chip selection signal through U15 (74LS138).U16A is compounded to form the program address of 32K to preceding four 8K addresses of U15, address assignment is: the program area takies 000H-7FFFH, display takies 8000H-9FFFH, keyboard interface takies 0A000H-0BFFFH, the address of RAM is 0C000H-0DFFFH, and sampling channel takies 0E000H-0FFFFH.
The CLK that reference channel signal comes cooperate with the CLKA signal finish tachometric survey, phase measurement jointly, tracking filter is controlled and integer-period sampled synchronously.
Fig. 6 top is system's connection layout of display; Show the drive controlling connection layout of position in the right lower quadrant square frame for each, positive charactron latchs driving by 74F273 altogether; Lower left quarter is the circuit of keyboard portion.
It is identical that the latching of 21 seven segment digital tubes drive to connect, and U19 is used for preceding 8 of gating and shows the position, and U20 is used for gating the 9th and shows the position to the 16th, and all the other 5 by the U21 gating, and the font sign indicating number then is directly to write on bus DD[0..7 by CPU] on.The full detail of measuring and moving shows that by these 21 charactrons are static its bit address is 8000H-8014H.Wherein 8000H-8003H and 8008H-800BH position are respectively left and right amplitude information section, and 8014H-8012H and 800EH-800CH are respectively left and right phase information section, and 8004H-8007H is the rotary speed information section, and 8011H-800FH is the state of runtime machine message segment.
16 key boards link to each other with interface chip 8155 by socket CT-1.Wherein SETUP, EXE are function key, and RESET is an operating key, but HALT and+/-for table tennis key, POINT/PRINT are the multiplexing key of radix point or the guiding of expanding printing interface, all the other are numerical key.
When tested (workpiece) rotor 11 after being dragged rotation by the belt of motor 5 on the equilibrator lathe bed, because centre of rotor inertia, main shaft and its rotation exist skew to produce uneven centrifugal force, force semihard supporting rocking carrier to be done and force vibration, two active electric power sensors that are installed on the semihard supporting rocking carrier are subjected to this power and electromechanical transducing take place, and produce the electric signal output supply test macro that two-way comprises unbalance information; Meanwhile, being installed near the rotor photoelectric sensor also produces with the rotor rotation and is transfused in the test macro as reference signal with the reference signal of homophase frequently.The duty that switch button 8,9 that is provided with on the equilibrator lathe bed and pilot lamp 10 are used to show the equilibrator lathe bed.
After test macro receives this three road signal, carry out pre-process, tracking filter, amplitude adjustment by hardware circuit, improve signal to noise ratio (S/N ratio) and obtain suitable level and input to computer processing system after be transformed to digital quantity by adc circuit, under the transient equilibrium software package that is solidificated in test macro Inner portion is supported, by noise elimination, the width of cloth, be separated, associated extraction, separation between the rectifying plane is resolved, least square weighted etc., amount of unbalance on two planes (gram) and correction angle (degree) about finally calculating, show by charactron, and provide actual measurement rotating speed (r/min) simultaneously.
It is that A, the B, the C size algorithm that utilize rotor separated algorithm with soft underprop pattern influence coefficient and mixed realizations that the separation of semihard supporting pattern is resolved, and the operational mode switching of systematic parameter all is by ordering setting under stopped status.Soft/die formula all is to carry out on same hard supporting rocking carrier, and the supporting rocking carrier need not to change or adjust during switching.
Claims (2)
1. dynamic balancing machine is tested in an intelligent tutoring, comprise that electrical measurement case [1] and balance bed piece two large divisions form, and is characterized in that: electrical measurement case [1] be by casing be arranged on the equilibrator lathe bed on a pair of active piezoelectric force transducer [4], photoelectric sensor [6] and formations such as computer digit disposal system, limiter shaping circuit, phase-locked letter frequency circuit, preprocessor, tracking filter, agc circuit, adc circuit are connected;
Photoelectric sensor [6] is sent the signal that receives into limiter shaping circuit, the phase-locked letter frequency circuit of input after the amplitude limit shaping, the phase locking frequency multiplying circuit is sent the part of signal into the computer digit disposal system, another part input tracking filter is also imported in the computer digit disposal system through agc circuit, adc circuit;
A pair of active piezoelectric force transducer [4] on the equilibrator lathe bed is arranged on the two ends of measured workpiece, the signal that receives is sent into preprocessor, after treatment signal input tracking filter and agc circuit, and by in the adc circuit input computer digit disposal system;
The equilibrator lathe bed comprises a base [2], be fixed with a pair of semihard supporting rocking carrier [3] on the base [2], on a pair of semihard supporting rocking carrier [3] active piezoelectric force transducer [4] is installed all, be used for placing and supporting measured workpiece on the semihard supporting rocking carrier [3], also be fixed with motor [5] on the base [2], motor [5] links to each other with measured workpiece by belt, and switch knob [8], [9], pilot lamp [10] and photoelectric sensor [6] are housed on the base [2].
2. intelligent tutoring dynamic balancing machine according to claim 1, it is characterized in that: described a pair of active piezoelectric force transducer [4] is sent the signal that receives into preprocessor, signal input tracking filter after treatment and the left and right vibration signal passage of the common composition of agc circuit; Photoelectric sensor [6] is formed reference channel signal with signal input saturation shaping circuit with the phase locking frequency multiplying circuit; Vibration signal passage input adc circuit converts digital quantity to and imports by the 89C51 single-chip microcomputer with the signal reference channel and be core, dispose in the computer digit disposal system of keyboard interface, expansion ROM, RAM, expanding printing interface and light-emitting diode display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01213136 CN2478196Y (en) | 2001-03-30 | 2001-03-30 | Intelligent teaching test dynamic balancing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01213136 CN2478196Y (en) | 2001-03-30 | 2001-03-30 | Intelligent teaching test dynamic balancing machine |
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| CN2478196Y true CN2478196Y (en) | 2002-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01213136 Expired - Fee Related CN2478196Y (en) | 2001-03-30 | 2001-03-30 | Intelligent teaching test dynamic balancing machine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914408A (en) * | 2012-11-08 | 2013-02-06 | 昆山北极光电子科技有限公司 | Dynamic balance test method for rotating machinery |
| CN103413486A (en) * | 2013-06-24 | 2013-11-27 | 东华大学 | Rigid-rotating-body soft unilateral supporting dynamic balancing machine |
| CN103606334A (en) * | 2013-12-02 | 2014-02-26 | 雷康 | Mechanical balance experiment instrument |
| CN104318852A (en) * | 2014-11-14 | 2015-01-28 | 重庆理工大学 | Magnetic dynamic balancing machine |
| CN105865714A (en) * | 2016-03-31 | 2016-08-17 | 西安电子科技大学 | Rotor imbalance measurement device based on grating scale feedback signal |
| CN106525336A (en) * | 2016-10-31 | 2017-03-22 | 石家庄铁道大学 | Rotor system unbalanced quantitative measurement system based on magnetorheological fluid and measurement method |
| CN106610332A (en) * | 2017-03-13 | 2017-05-03 | 哈尔滨朗格科技开发有限公司 | Balancing machine for detecting electric vehicle wheels and method for detecting unbalance mass in dynamic and static balance using same |
| CN106932142A (en) * | 2017-03-13 | 2017-07-07 | 哈尔滨朗格科技开发有限公司 | Detect the balancing machine and the method using unbalance mass, in the dynamic and static balance of balance machine testing of bike wheel |
-
2001
- 2001-03-30 CN CN 01213136 patent/CN2478196Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914408A (en) * | 2012-11-08 | 2013-02-06 | 昆山北极光电子科技有限公司 | Dynamic balance test method for rotating machinery |
| CN103413486A (en) * | 2013-06-24 | 2013-11-27 | 东华大学 | Rigid-rotating-body soft unilateral supporting dynamic balancing machine |
| CN103413486B (en) * | 2013-06-24 | 2016-01-13 | 东华大学 | The soft monolateral support dynamic balancing machine of a kind of rigid rotator |
| CN103606334A (en) * | 2013-12-02 | 2014-02-26 | 雷康 | Mechanical balance experiment instrument |
| CN103606334B (en) * | 2013-12-02 | 2019-05-10 | 新昌县屹然智能科技有限公司 | Mechanical balance experiment instrument |
| CN104318852A (en) * | 2014-11-14 | 2015-01-28 | 重庆理工大学 | Magnetic dynamic balancing machine |
| CN105865714B (en) * | 2016-03-31 | 2018-02-09 | 西安电子科技大学 | A kind of rotor unbalance measurement apparatus based on grating scale feedback signal |
| CN105865714A (en) * | 2016-03-31 | 2016-08-17 | 西安电子科技大学 | Rotor imbalance measurement device based on grating scale feedback signal |
| CN106525336A (en) * | 2016-10-31 | 2017-03-22 | 石家庄铁道大学 | Rotor system unbalanced quantitative measurement system based on magnetorheological fluid and measurement method |
| CN106525336B (en) * | 2016-10-31 | 2018-11-02 | 石家庄铁道大学 | Rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetorheological fluid and measurement method |
| CN106610332A (en) * | 2017-03-13 | 2017-05-03 | 哈尔滨朗格科技开发有限公司 | Balancing machine for detecting electric vehicle wheels and method for detecting unbalance mass in dynamic and static balance using same |
| CN106932142A (en) * | 2017-03-13 | 2017-07-07 | 哈尔滨朗格科技开发有限公司 | Detect the balancing machine and the method using unbalance mass, in the dynamic and static balance of balance machine testing of bike wheel |
| CN106932142B (en) * | 2017-03-13 | 2019-04-19 | 哈尔滨朗格科技开发有限公司 | The method for detecting the balancing machine of bike wheel and detecting unbalance mass, |
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| CF01 | Termination of patent right due to non-payment of annual fee |