CN203480322U - Sensor automatic centering system in small-hole measurement - Google Patents
Sensor automatic centering system in small-hole measurement Download PDFInfo
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- CN203480322U CN203480322U CN201320587533.5U CN201320587533U CN203480322U CN 203480322 U CN203480322 U CN 203480322U CN 201320587533 U CN201320587533 U CN 201320587533U CN 203480322 U CN203480322 U CN 203480322U
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- stepper motor
- leading screw
- automatic centering
- worktable
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Abstract
The utility model discloses a sensor automatic centering system in small-hole measurement. The system contains a pedestal, on which a supporting seat is arranged. A workbench which can slide along X and Y directions of a three-dimensional coordinate is disposed on the supporting seat. A capacitance probe is mounted at the central position of the workbench. Two symmetrical supporting rods are respectively fixed in X and Y directions of the workbench. One of the symmetrical supporting rods is provided with a laser transmitter, and the other one of the symmetrical supporting rods is provided with a laser receiver. A lead screw III driven by a Z-direction stepper motor is arranged in the Z direction of the three-dimensional coordinate at one side of the workbench. A sliding table is connected to a nut of the lead screw III. The sliding table is connected to a polished rod used for supporting a workpiece. The capacitance probe is used for measuring the aperture of the workpiece, and the capacitance probe is connected with a signal processing device. The system provided by the utility model has advantages of high measurement accuracy and rapid response.
Description
Technical field
The utility model specifically disclose a kind of hole diameter measure in the automatic centering system of center line of sensor probe and measured hole.
Background technology
The research of contact measurement and non-cpntact measurement reaches its maturity.For diameter, be less than the measurement of the following hole diameter of several millimeters, particularly will measure the central axis of aperture, also there is no at present very perfect measurement means and method.For the measurement of this small-bore, Britain once produced a kind of aperture measuring instrument as far back as the eighties, this measuring instrument with small glass bead as probe, the diameter of contact measurement aperture.But because control operation is cumbersome, especially the probe of front end is easy to damage, and is not suitable for high-precision measurement, so this instrument has been eliminated soon.In the evolution of the capacitive transducer technology of China, a lot of teachers in University Of Tianjin's Precision Inspection and instrument state key testing laboratory have original research to different capacitive transducers, many surveying instruments of making sensor based on electric capacity have been made in their cooperation, are applied in modern production.Domestic many colleges and universities, producer and R&D institution is engaged in development and the exploitation of sensor, following the level of scientific technological advance.There is many advantages in capacitive transducer, comprising highly sensitive, precision is high, dynamic response good, the typical advantage such as simple in structure, be exactly these advantages aspect measurement, in very early, it is just utilized to measure displacement, internal diameter, thickness, temperature, vibration etc.But because manufacture level and capacitive transducer itself at that time exists some defects, scientific technological advance is not mature enough, and it is greatly limited in the application of fields of measurement.In decades recently, along with the development of electronic science and technology, the raising of manufacture level.Capacitive transducer starts to show especially its superiority, the appearance of micro element, make electronic circuit can be as much as possible near sensor, this has just brought possibility for utilizing sensor to realize to measure, and has further improved the sensitivity of precision and measurement.
In aperture measuring, the automatic centering technology of sensor probe, is very paid attention to abroad, and many producers have all developed the various automatic centring devices that have their own characteristics each, and wherein has some to apply aborning.At present in the research and design of automatic centering system, the most ripe with German product, the arrival of laser alignment instrument make the maintainer of equipment can be more convenient, sooner, more accurately machine is realized to better centering, realized and having installed simply, deviation shows automatically, but also the move angle of reference axis and amount of movement automatically.Due to having relatively high expectations of automatic centering system design degree of accuracy, and main production equipment is mainly from abroad, picture Germany, Japan, the U.S. etc., so the purchasing price of this kind equipment is higher, and China's research starting is in this respect relatively late, technology is relatively backward, will be subject to the abroad restriction of great number equipment in the application at the automatic centering system of sensor in autonomy-oriented production run.
China starts research and the design that high price realizes automatic centering and carries out automatic centering system from buying laser alignment instrument abroad the beginning of the nineties, laser alignment instrument is the fast method of realizing automatic centering, it is used in a plurality of fields, and in the automatic centering system of sensor, is also well applied in aperture measuring.The technical progress an urgent demand informationization of the fast development of national economy and other industry is widely used in industrial aspect, particularly need new technology to rebuild traditional industry, therefore industrial automation technology is able to develop very soon, utilize industrial automation technological transformation conventional industries and the industrial structure, improve robotization, intellectuality, the level of IT application, strengthening enterprise competitiveness, is a very urgent task.Along with developing rapidly of industrial automation technology, the level of automation control system is improving constantly.From unit, control and develop into dcs (DCS), along with Programmable Logic Controller (PLC) performance is constantly perfect, in DCS, be widely used.
In the modern production process of engine, can determine fast and accurately the position of aperture central axis, become enterprise and realized the gordian technique of effectively producing competition, it not only can affect the performance of engine, more can directly affect the production efficiency of engine, affect the yield-power of enterprise.In recent decades, along with manufacturing development, the precision of machining is more and more higher, has reached micron dimension, especially at accurate and ultraprecise manufacture field.
If aperture device die misalignment, can cause a series of problems such as shaft coupling friction increases, bearing damages too early, rotating shaft moves back and forth, thereby improves the operating cost of machine, greatly shorten the serviceable life of machine, reduce the efficiency of energy utilization of machine.In addition, the sealing that die misalignment can countershaft produces serious influence, and the expense of changing air locking can reach sometimes time and buys 20% of machine price.
Utility model content
In order to solve the adverse effect that shaft coupling rotating shaft, bearing are caused of the large generation of hole class device die misalignment centering rugosity, reduce the cost of the operation of machine, reduce the cost of safeguarding, extend the life-span of the use of machine, the utilization ratio that improves the energy of machine, the utility model provides the automatic centering system of sensor in a kind of aperture measuring.
The technical solution adopted in the utility model is as follows:
The automatic centering system of sensor in aperture measuring, comprises a base, is provided with a supporting seat above described base, is provided with an energy at three-dimensional coordinate X, the worktable slidably reciprocating in Y-direction on described supporting seat; The center of described worktable is provided with a capacitance probe, at the X of worktable, Y-direction, each fixes two symmetrical poles, and the center line of symmetrical pole and the center line of capacitance probe are point-blank, on symmetrical pole, one of them pole is provided with laser beam emitting device, and another is provided with laser receiver (being Fibre Optical Sensor) above pole; A side three-dimensional coordinate Z-direction at worktable is provided with a stepper motor driven leading screw III of Z-direction, connects a slide unit on the nut of described leading screw III, and described slide unit connects a polished rod for supporting workpiece; Described capacitance probe is for the aperture in measuring workpieces, and described capacitance probe is connected with signal processing apparatus.
The drive system of described worktable comprises X-direction stepper motor and Y-direction stepper motor, the output terminal of described X-direction stepper motor connects gear drive deceleration system I, the output terminal of gear reduction system I drives leading screw I to rotate, nut I on leading screw I drives the mounting system being mounted thereon in X-direction, to move left and right together, is provided with the worktable that can seesaw along it in described mounting system; Described Y-direction stepper motor output terminal connects gear drive deceleration system II, and the output terminal of gear reduction system II drives leading screw II to rotate, and the nut II on leading screw II drives the worktable being mounted thereon in Y-direction, to move forward and backward together.
The output terminal of described Z-direction stepper motor connects gear drive deceleration system III, the output terminal of gear reduction system III drives leading screw III to rotate, nut III on leading screw III drives connected slide unit to move in Z direction, described slide unit is located on a guide rod parallel with leading screw III, and slide unit can slidably reciprocate along guide rod.
Described laser beam emitting device is launching fiber, and laser receiver is for receiving optical fiber, and reception optical fiber is 2; And two receive optical fiber with respect to the center line symmetric offset spread of capacitance probe.When laser is by after capacitance probe, if the light intensity of two Fibre Optical Sensor receptions is the same, illustrate that capacitance probe is upwards placed in the middle the party.If the light intensity that optical fiber receives is inconsistent, illustrate that so capacitance probe and centerline hole are inconsistent, start X or Y-direction driven by motor movable workbench, until the light intensity of Fibre Optical Sensor is consistent.
The electric capacity, the standard capacitance that between described capacitance probe and tested aperture, form are connected with amplifier, respectively as feedback capacity and the input capacitance of amplifier; Described amplifier is connected with oscillator, and oscillator provides the oscillator signal of standard for it; The output terminal of amplifier is connected with precise rectification circuit, and described precise rectification circuit is connected with wave filter, and described wave filter is connected with digital watch or computing machine in conjunction with stabilized voltage supply, zeroing circuit, and computing machine is processed the signal of measuring.
Described X-direction stepper motor, Y-direction stepper motor and Z-direction stepper motor are by driver drives, and be connected with a grating encoder separately respectively, described grating encoder sends to motion control card by the signal of collection, described motion control card control driver.
Described Z axis grating encoder is selected L325 type grating scale, length of the scale 325
mm, measure length 320
mm; The grating encoder of X, Y-axis is selected L30 type grating scale, length of the scale 30
mm, measure length 25
mm, select M1550S-40 type read head, circuit carries out 20 segmentations.
The hole diameter of surveying in utility model is 1-7mm.
The course of work of the present utility model is as follows:
Laser fiber measurement mechanism is arranged on two-dimentional work bench, is consistent in advance by it with the adjusting of centerline in hole.Before measuring aperture, first use laser fiber measurement mechanism to capacitance probe centering, if find, misalign, start XY to motor action, drive two-dimentional work bench motion, make the aperture motion on it, reach centering.After the center line centering in probe and hole, restart Z-direction motor and drive probe to carry out inside diameter measurement downwards, the electric capacity recording is processed by signal processing apparatus.
The beneficial effects of the utility model are:
Novel capacitance-type aperture measuring sensor is according to non-contact measurement principle, the impact without ergometry on sensor during measurement; Adopt equal potential belt to eliminate the edge effect of capacitive transducer, adopt driving cable technology to weaken the impact of stray capacitance, utilize two-dimentional micro-adjusting mechanism to realize the Precision Coaxial location of sensor and measured hole, under the control of computing machine, capacitance probe gos deep into aperture inside to be measured automatically, and therefore, condenser type noncontact aperture measuring system has very high measuring accuracy, fast, this system efficiently solves the difficult problem that each cross section internal diameter size of existing small deep hole is measured in response.
Accompanying drawing explanation
Fig. 1 front view of the present utility model;
Fig. 2 vertical view of the present utility model;
Fig. 3 vertical view of the present utility model;
The structure enlarged drawing of I part in Fig. 4 Fig. 1;
The signal of Fig. 5 capacitance probe part is processed figure;
Fig. 6 measuring system controlling composition block diagram;
In figure: 1 X-direction stepper motor, 2 leading screw I, 3 poles, 4 capacitance probes, 5 leading screw III, 6 polished rods, 7 guide rods, 8 leading screw II, 9 slide units, 10 Z-direction stepper motors, 11 supporting seats, 12 bases, 13 bearings, 14 worktable, 15 Y-direction stepper motors.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
As shown in Fig. 1-Fig. 6, the automatic centering system of sensor in aperture measuring, comprises a base 12, and described base 12 is provided with a supporting seat 11 above, is provided with an energy at X, the worktable 14 slidably reciprocating in Y-direction on described supporting seat 11; The center of described worktable 14 is provided with a capacitance probe 4, at the X of worktable 14, Y-direction, each fixes two symmetrical poles 3, and the center line of symmetrical pole 3 and the center line of capacitance probe 4 are point-blank, on symmetrical pole 3, one of them pole 3 is provided with laser beam emitting device, and another is provided with Fibre Optical Sensor as laser receiver above pole; A side at worktable 14 is provided with the leading screw III5 that a Z-direction stepper motor 10 drives, and connects a slide unit 9 on the nut of described leading screw III5, and described slide unit 9 connects a polished rod 6 for supporting workpiece; Described capacitance probe 4 is for the aperture in measuring workpieces, and capacitance probe 4 is fixed on worktable 14 by bearing 13.
The drive system of worktable 14 comprises X-direction stepper motor 1 and Y-direction stepper motor 15, the output terminal of described X-direction stepper motor 1 connects gear drive deceleration system I, the output terminal of gear reduction system I drives leading screw I2 to rotate, nut I on leading screw I2 drives the mounting system being mounted thereon in X-direction, to move left and right together, is provided with the worktable that can seesaw along it in described mounting system; Described Y-direction stepper motor 15 output terminals connect gear drive deceleration system II, and the output terminal of gear reduction system II drives leading screw II8 to rotate, and the nut II on leading screw II8 drives the worktable being mounted thereon in Y-direction, to move forward and backward together.
The output terminal of described Z-direction stepper motor 10 connects gear drive deceleration system III, the output terminal of gear reduction system III drives leading screw III5 to rotate, nut III on leading screw III5 drives connected slide unit 9 to move in Z direction, described slide unit is located on a guide rod parallel with leading screw III5, and slide unit can slidably reciprocate along guide rod 7.
Described laser beam emitting device is launching fiber, and laser receiver is for receiving optical fiber, and reception optical fiber is 2; And two receive optical fiber with respect to the center line symmetric offset spread of capacitance probe.When laser is by after capacitance probe, if the light intensity of two Fibre Optical Sensor receptions is the same, illustrate that capacitance probe is upwards placed in the middle the party.If the light intensity that optical fiber receives is inconsistent, illustrate that so capacitance probe and centerline hole are inconsistent, start X or Y-direction driven by motor movable workbench, until the light intensity of Fibre Optical Sensor is consistent.
The electric capacity, the standard capacitance that between described capacitance probe and tested aperture, form are connected with amplifier, respectively as feedback capacity and the input capacitance of amplifier; Described amplifier is connected with oscillator, and oscillator provides the oscillator signal of standard for it; The output terminal of amplifier is connected with precise rectification circuit, and described precise rectification circuit is connected with wave filter, and described wave filter is connected with digital watch or computing machine in conjunction with stabilized voltage supply, zeroing circuit, and computing machine is processed the signal of measuring.
The different depth that need to be deep into aperture due to the probe of capacitive transducer is surveyed, meanwhile, the precise centering adjustment before capacitive transducer need to be measured, therefore, measuring system needs the precise motion of X, Y, tri-directions of Z to control.Wherein, the motion of X, Y-direction is realized by two-dimensional micromotion stage, the motion of Z direction is driven by Z-direction stepper motor, motion-control module comprises stepper motor and driver, stepping motor control card, pulse signal generator and grating encoder, wherein pulse signal generator is for manual control step motor, and computing machine+motion control card is for automatic control step motor.
On two, two-dimentional guide rail, be axially furnished with respectively 28BYG stepper motor, by the PCI-1240 type 4 axle control cards based on pci bus technology, carry out accurate motion control, step distance is only 3 ~ 5
mm, step motor control X, Y-axis motion realize the precise centering of condenser type gaging hole transducer probe assembly and measured workpiece, and stepping accuracy directly has influence on inside diameter measurement precision.Therefore, by driver, X, y-axis stepper motor are carried out to 32 segmentations, its resolution reaches, and Z axis stepper motor is carried out to 8 segmentations, and its resolution reaches.
For preventing stepper motor, lose step phenomenon, and further improve the positioning precision of X, Y, Z axis, adopt respectively Micro-E grating encoder and stepper motor to form closed loop control mode, using the rreturn value of grating encoder as the effective information of controlling motor movement, X, Y, Z axis measurement range, Z axis is selected L325 type grating scale, length of the scale 325
mm, measure length 320
mm; X, Y-axis are selected L30 type grating scale, length of the scale 30
mm, measure length 25
mm, select M1550S-40 type read head, circuit carries out 20 segmentations, therefore grating scale resolution arrives.Grating scale is attached on Z axis gage beam and X, Y two-dimensional micromotion slide unit guide rail on, and lay measuring head support at correct position place, sensor head is fixed on support by mounting screw, utilize the Smart Signal alignment tool that grating encoder carries to adjust gap and the angle between grating scale and read head, guarantee that grating encoder can work, greatly improve thus the positioning precision of stepper motor, thereby guaranteed the requirement of measuring accuracy.
Fig. 4 is for amplifying the structured flowchart of processing and data acquisition to the faint measuring-signal of capacitive transducer, wherein arithmetic expression capacitance gage mainly comprises accurate amplitude stabilizer oscillator, high-gain main amplifier, precision rectifying, low-pass filter, zeroing circuit, stabilized voltage supply etc.This instrument has adopted the Wen bridge amplitude stabilizer oscillator of its amplitude stability in PPm level, and frequency is 15-22kHz.Because the distance values of sensor probe and measured hole is very little, electric capacity is very high, therefore require the input impedance of pre-amplifier very high and have enough gain amplifiers (generally at 80-95dB), owing to having adopted unique design and driving cable new technology, an one input is very suspended, the impact that has solved well stray capacitance and stray capacitance etc.
Native system data acquisition module utilizes seven Semi-digital voltage tables of KEITHLEY 182 models to carry out analog to digital conversion, and precision can reach rank, and by the GPIB-USB interface of NI company, digital quantity is imported in computing machine to carry out data processing and control.GPIB-USB is for the GPIB controller of high speed USB 2.0; Standard transmission speed is up to 1.8MB/s; Instant inserted and instant using type is installed, and is conveniently connected use with capacitance gage.
Claims (7)
1. the automatic centering system of sensor in aperture measuring, is characterized in that: comprise a base, be provided with a supporting seat above described base, be provided with an energy at three-dimensional coordinate X, the worktable slidably reciprocating in Y-direction on described supporting seat; The center of described worktable is provided with a capacitance probe, at the X of worktable, Y-direction, each fixes two symmetrical poles, and the center line of symmetrical pole and the center line of capacitance probe are point-blank, on symmetrical pole, one of them pole is provided with laser beam emitting device, and another is provided with laser receiver above pole; A side three-dimensional coordinate Z-direction at worktable is provided with a stepper motor driven leading screw III of Z-direction, connects a slide unit on the nut of described leading screw III, and described slide unit connects a polished rod for supporting workpiece; Described capacitance probe is for the aperture in measuring workpieces, and described capacitance probe is connected with signal processing apparatus.
2. automatic centering system as claimed in claim 1, it is characterized in that: the drive system of described worktable comprises X-direction stepper motor and Y-direction stepper motor, the output terminal of described X-direction stepper motor connects gear drive deceleration system I, the output terminal of gear reduction system I drives leading screw I to rotate, nut I on leading screw I drives the mounting system being mounted thereon in X-direction, to move left and right together, is provided with the worktable that can seesaw along it in described mounting system; Described Y-direction stepper motor output terminal connects gear drive deceleration system II, and the output terminal of gear reduction system II drives leading screw II to rotate, and the nut II on leading screw II drives the worktable being mounted thereon in Y-direction, to move forward and backward together.
3. automatic centering system as claimed in claim 1, it is characterized in that: the output terminal of described Z-direction stepper motor connects gear drive deceleration system III, the output terminal of gear reduction system III drives leading screw III to rotate, nut III on leading screw III drives connected slide unit in the motion of Z direction, and described slide unit is located on a guide rod parallel with leading screw III.
4. automatic centering system as claimed in claim 1, is characterized in that: described laser beam emitting device is launching fiber, and laser receiver is for receiving optical fiber, and reception optical fiber is 2; Two receive optical fiber with respect to the center line symmetric offset spread of capacitance probe.
5. automatic centering system as claimed in claim 1, is characterized in that: the electric capacity, the standard capacitance that between described capacitance probe and tested aperture, form are connected with amplifier; Described amplifier is connected with oscillator; The output terminal of amplifier is connected with precise rectification circuit, and described precise rectification circuit is connected with wave filter, and described wave filter is connected with digital watch or computing machine in conjunction with stabilized voltage supply, zeroing circuit.
6. automatic centering system as claimed in claim 2, it is characterized in that: described X-direction stepper motor, Y-direction stepper motor and Z-direction stepper motor are by driver drives, and be connected with a grating encoder separately respectively, described grating encoder sends to motion control card by the signal of collection, described motion control card control driver.
7. automatic centering system as claimed in claim 6, is characterized in that: described Z-direction grating encoder is selected L325 type grating scale, length of the scale 325
mm, measure length 320
mm; The grating encoder of X, Y-direction is selected L30 type grating scale, length of the scale 30
mm, measure length 25
mm, select M1550S-40 type read head, circuit carries out 20 segmentations.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320587533.5U CN203480322U (en) | 2013-09-22 | 2013-09-22 | Sensor automatic centering system in small-hole measurement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320587533.5U CN203480322U (en) | 2013-09-22 | 2013-09-22 | Sensor automatic centering system in small-hole measurement |
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| CN203480322U true CN203480322U (en) | 2014-03-12 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513664A (en) * | 2013-09-22 | 2014-01-15 | 济南大学 | Automatic centering system of sensor in hole measuring |
| CN105258637A (en) * | 2015-10-30 | 2016-01-20 | 东莞市嘉腾仪器仪表有限公司 | Fully-automatic cantilever type image measuring device and method |
| CN106124150A (en) * | 2016-08-31 | 2016-11-16 | 苏州东菱振动试验仪器有限公司 | A kind of detecting device and using its adjusting means for centering |
| CN108303059A (en) * | 2018-01-18 | 2018-07-20 | 燕山大学 | A kind of precision bearing system gap detection device based on parallel institution |
| CN112286233A (en) * | 2017-02-17 | 2021-01-29 | 南通大学 | Working method of double-measuring-head automatic alignment system based on laser displacement sensor |
| TWI724696B (en) * | 2019-12-18 | 2021-04-11 | 財團法人工業技術研究院 | Workpiece hole measurement method |
-
2013
- 2013-09-22 CN CN201320587533.5U patent/CN203480322U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513664A (en) * | 2013-09-22 | 2014-01-15 | 济南大学 | Automatic centering system of sensor in hole measuring |
| CN103513664B (en) * | 2013-09-22 | 2015-10-28 | 济南大学 | The automatic centering system of sensor in aperture measuring |
| CN105258637A (en) * | 2015-10-30 | 2016-01-20 | 东莞市嘉腾仪器仪表有限公司 | Fully-automatic cantilever type image measuring device and method |
| CN106124150A (en) * | 2016-08-31 | 2016-11-16 | 苏州东菱振动试验仪器有限公司 | A kind of detecting device and using its adjusting means for centering |
| CN112286233A (en) * | 2017-02-17 | 2021-01-29 | 南通大学 | Working method of double-measuring-head automatic alignment system based on laser displacement sensor |
| CN112286233B (en) * | 2017-02-17 | 2021-09-14 | 南通大学 | Working method of double-measuring-head automatic alignment system based on laser displacement sensor |
| CN108303059A (en) * | 2018-01-18 | 2018-07-20 | 燕山大学 | A kind of precision bearing system gap detection device based on parallel institution |
| TWI724696B (en) * | 2019-12-18 | 2021-04-11 | 財團法人工業技術研究院 | Workpiece hole measurement method |
| US11120545B2 (en) | 2019-12-18 | 2021-09-14 | Industrial Technology Research Institute | Method for measuring hole provided in workpiece |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20140922 |
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| EXPY | Termination of patent right or utility model |