CN208206050U

CN208206050U - Accurate roundness measuring device

Info

Publication number: CN208206050U
Application number: CN201820570426.4U
Authority: CN
Inventors: 曹华丽; 刘明宇
Original assignee: Shenzhen Graduate School Harbin Institute of Technology
Current assignee: Shenzhen Graduate School Harbin Institute of Technology
Priority date: 2018-04-20
Filing date: 2018-04-20
Publication date: 2018-12-07
Anticipated expiration: 2028-04-20

Abstract

The utility model provides a kind of accurate roundness measuring device, including roundness measurement module, the roundness measurement module includes mechanical fastener, narrow-band light source, CCD/CMOS acquisition chip, CCD/CMOS signal processing circuit unit, microprocessor and data transmission interface circuit, wherein, the narrow-band light source is fixed on the side of the mechanical fastener, the CCD/CMOS acquisition chip is fixed on the other side of the mechanical fastener, the narrow-band light source projects parallel strips light to the CCD/CMOS acquisition chip, the CCD/CMOS acquisition chip is electrically connected with the CCD/CMOS signal processing circuit unit, the CCD/CMOS signal processing circuit unit is electrically connected with the microprocessor and data transmission interface circuit.The beneficial effects of the utility model are: having high-precision, high efficiency, inexpensive and versatile advantage.

Description

Accurate roundness measuring device

Technical field

The utility model relates to measuring tool more particularly to a kind of accurate roundness measuring devices.

Background technique

Circularity be measure roller an important technology index, at present measure circularity device generally can be divided into contact and Contactless two kinds, and the useful amesdial of contact measuring apparatus and peripheral surface contacts, it then rotates and is measured roller, record The reading of amesdial, finally obtains circularity；Non-contact measurement apparatus then uses an optical sensor to replace amesdial, same to turn Dynamic measured roller, records the reading of sensor, finally obtains roundness measurement result.

Such as Chinese patent CN103234431A, utility model people designs a kind of measuring appliance with 120 ° and 90 ° angles, surveys Amesdial is installed above measuring device, measuring appliance is placed on above measured cylinder and carries out roundness measurement, to avoid mobile volume It is larger, the tested cylinder of heavier mass.It is difficult that the patent solves the problems, such as heavy big parts measurement, but in measurement process due to It to be rotated around cylindrical part, the measuring uncertainty that manual operation introduces is bigger.Chinese patent CN202188833U is practical new Type people designs the measuring instrument of a measurement steel pipe roundness, and measurement sensor is mounted on turntable, and sensor can be rotated around turntable, To measure the location information of each point on circumference, to obtain the result of roundness measurement.Automatic measurement may be implemented in the device, The influence of manual intervention is reduced, but very high to the requirement several times of turntable, so that cost is relatively high.

Utility model content

In order to solve the problems in the prior art, the utility model provides that a kind of precision is high, accurate circularity at low cost Measuring device.

The utility model provides a kind of accurate roundness measuring device, including roundness measurement module, the roundness measurement mould Block includes mechanical fastener, narrow-band light source, CCD/CMOS acquisition chip, CCD/CMOS signal processing circuit unit, microprocessor And data transmission interface circuit, wherein the narrow-band light source is fixed on the side of the mechanical fastener, and the CCD/CMOS is adopted Collection chip is fixed on the other side of the mechanical fastener, and the narrow-band light source projection parallel strips light to the CCD/CMOS is adopted Collect chip, the CCD/CMOS acquisition chip is electrically connected with the CCD/CMOS signal processing circuit unit, the CCD/CMOS Signal processing circuit unit is electrically connected with the microprocessor and data transmission interface circuit.

The CCD/CMOS acquisition chip is equipped with optical filter, the narrowband as a further improvement of the utility model, Light source projects parallel strips light is received after passing through the optical filter by the CCD/CMOS acquisition chip.

CCD/CMOS signal processing circuit unit, microprocessor and data pass as a further improvement of the utility model, Defeated interface circuit is arranged on the mechanical fastener.

The roundness measurement module is connected with translation mechanism as a further improvement of the utility model,.

The translation mechanism includes lathe and knife rest as a further improvement of the utility model, the lathe with it is described Knife rest connection, the roundness measurement module are fixed on the knife rest.

The lathe is connected with roller as a further improvement of the utility model,.

The microprocessor and data transmission interface circuit are electrically connected with calculating as a further improvement of the utility model, Machine.

The beneficial effects of the utility model are: having high-precision, high efficiency, inexpensive and versatile advantage.

Detailed description of the invention

Fig. 1 is a kind of instrumentation plan of accurate roundness measuring device of the utility model.

Fig. 2 is that a kind of roundness measurement module of accurate roundness measuring device of the utility model and the relative position of roller are illustrated Figure.

Fig. 3 is putting for a kind of roundness measurement module of accurate roundness measuring device of the utility model and the relative position of roller Big schematic diagram.

Fig. 4 is a kind of schematic diagram of the roundness measurement module of accurate roundness measuring device of the utility model.

Fig. 5 is the signal of the percentage of roller end face shared by a kind of measurement side of accurate roundness measuring device of the utility model Figure.

Fig. 6 is that a kind of different piece cylinder position of accurate roundness measuring device of the utility model acquires core in CCD/CMOS The schematic diagram of the different projections of on piece.

Specific embodiment

The utility model is described in further detail for explanation and specific embodiment with reference to the accompanying drawing.

As shown in Figures 1 to 6, a kind of accurate roundness measuring device, including roundness measurement module 2, the roundness measurement mould Block 2 includes mechanical fastener 6, narrow-band light source 7, optical filter 8, CCD/CMOS acquisition chip 9, CCD/CMOS signal processing circuit list Member 10, microprocessor and data transmission interface circuit 11, wherein the narrow-band light source 7 is fixed on the one of the mechanical fastener 6 Side, the optical filter 8 and CCD/CMOS acquisition chip 9 are fixed on the other side of the mechanical fastener 6, the narrow-band light source 7 projection parallel strips light are received after optical filter 8 by the CCD/CMOS acquisition chip 9, the CCD/CMOS acquisition chip 9 with The CCD/CMOS signal processing circuit unit 10 is electrically connected, the CCD/CMOS signal processing circuit unit 10 and micro- place It manages device and data transmission interface circuit 11 is electrically connected.

As shown in Figures 1 to 6, optical filter 8 can be set on the CCD/CMOS acquisition chip 9, can also be not provided with filtering Mating plate 8, CCD/CMOS acquisition chip 9 are directly used as measuring cell, are not necessarily to adjunction optical lens, using narrow-band light source 7 and consider light Piece 8 is used as light source and filter element, it is possible to reduce influence of the environment light to measurement result.

As shown in Figures 1 to 6, CCD/CMOS signal processing circuit unit 10, microprocessor and data transmission interface circuit 11 are arranged on the mechanical fastener 6, and mechanical fastener 6 is in half frame-shaped.

As shown in Figures 1 to 6, the roundness measurement module 2 is connected with translation mechanism.

As shown in Figures 1 to 6, the translation mechanism includes lathe 3 and knife rest 4, and the lathe 3 is connect with the knife rest 4, The roundness measurement module 2 is fixed on the knife rest 4.

As shown in Figures 1 to 6, the lathe 3 is connected with roller 1, and roundness measurement module 2 is mounted on knife rest 4, by lathe 3 drive, and are moved on the end face of roller 1 and measure.

As shown in Figures 1 to 6, the microprocessor and data transmission interface circuit 11 are electrically connected with computer 5, computer 5 collect data when measuring by microprocessor and data transmission interface circuit 11 and carry out data processing.

As shown in Fig. 2, illustrating the space geometry relationship between roundness measurement module 2 and tested roller 1 in figure.Work as circle Spend measurement module 2 and roller 1 close to when, be that roller 1 is motionless (being fixed on the workbench of lathe 3) when practical operation, circularity Measurement module 2 is driven by 3 kinematic axis of lathe, is moved on the end face to be measured of roller 1, since 1 end face perimeter of roller compares circularity Measurement module 2 is big, and a complete measurement needs lathe 3 that the rotation of roller 1 is driven to carry out repeatedly being measured from final result.

As shown in figure 3, the space geometry illustrated when measurement between roundness measurement module 2 and tested roller 1 in figure closes The amplification schematic top view of system.When measurement, CCD/CMOS acquisition chip 9 is parallel to the end face of tested roller 1, and CCD/CMOS is adopted Collect the center of chip 9 and the axle center of roller 1 in same level.

As shown in figure 4, being as shown in the figure the internal structure of roundness measurement module 2, mechanical fastener 6, which can connect, to be mounted on To drive entire measurement module mobile on knife rest 4.Narrow-band light source 7 projects directional light, and acquires core perpendicular to CCD/CMOS Piece 9, the bandpass range for considering mating plate 8 is consistent with the spectral region of narrow-band light source 7, to reduce the influence of environment light.

As shown in figure 5, the roller 1 that a diameter is 200 millimeters is illustrated in figure, and the side of CCD/CMOS acquisition chip 9 At a length of 10 millimeters, the percentage of 1 end face of roller shared by side is measured.The side length of CCD/CMOS acquisition chip 9 be L, roller 1 it is straight Diameter is R, then the angle 12 that single secondary measurement data accounts for circumference is α=L/R, to obtain the partial data of end face circumference, then measurement time Number is at least the π of n=2 π/α=2 R/L, it is notable that measurement data can be overlapped, thus pendulous frequency can increase accordingly.

As shown in fig. 6, when illustrating 1 different location of roller in figure, what the difference on CCD/CMOS acquisition chip 9 projected Schematic diagram, when having carried out multiple measurement, since the end face of roller 1 is not a perfect circle, thus it is in CCD/CMOS Projection will be not quite similar on acquisition chip 9, be overlapped then data it can be concluded that the projection zone of a respective range, this band Circularity of the width then with measured roller 1 have one-to-one relationship, thus the circularity of roller 1 to be measured can be obtained.

Precision roundness measuring device provided by the utility model, can measure the very big roller 1 of diameter range, utilize CCD/ The sensor array of CMOS acquisition chip 9 greatly improves workable data volume as measuring cell, in addition CCD/CMOS is acquired Chip 9 has very high pixel precision, in addition sub-pix segments technology, can further improve measurement result precision, utilizes CCD/ The mature technology of CMOS acquisition chip 9 is as measurement reference, at low cost, high reliablity.

Precision roundness measuring device provided by the utility model, is surveyed suitable for online or offline circularity is carried out to roller 1 Amount, can be used for 1 circularity of roller airborne measurements roller.Roundness measurement module 2 is mainly by the computer of data processing 5, mechanical connection Part 6, narrow-band light source 7 consider mating plate 8, CCD/CMOS acquisition chip 9, CCD/CMOS signal processing circuit unit 10 and micro process Device and data transmission interface circuit 1 are constituted；When measurement, which is mounted on knife rest 4, is driven by lathe 3, is moved It moves and is measured on the end face of roller 1.Parallel strips light is projected by narrow-band light source 7, and by optical filter 8 by CCD/CMOS Acquisition chip 9 receives, and obtains the partial data of 1 end face of roller, by control roller 1 rotate a circle acquire the data at each position from And the partial data of available 1 end face of roller, the circularity information of available 1 end face of roller.The device has high-precision, high Efficiency, inexpensive and versatile feature.

A kind of accurate roundness measuring device provided by the utility model, has the advantage that

1. at low cost using CCD/CMOS as main measurement sensor.

2. unit pixel size can arrive micron order since CCD/CMOS technological level is mature, measurement accuracy is high.

3. using digital subdividing algorithm, it can accomplish the precision of sub-pix.

4. using narrow-band light source 7 and considering mating plate 8 as light source and filter element, environment light is reduced to the shadow of measurement result It rings

5. measuring speed is very fast, the acquisition in real time of computer 5 and processing data are greatly improved measuring speed.

It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard To belong to the protection scope of the utility model.

Claims

1. a kind of precision roundness measuring device, it is characterised in that: including roundness measurement module, the roundness measurement module includes machine Tool connector, narrow-band light source, CCD/CMOS acquisition chip, CCD/CMOS signal processing circuit unit, microprocessor and data pass Defeated interface circuit, wherein the narrow-band light source is fixed on the side of the mechanical fastener, and the CCD/CMOS acquisition chip is solid It is scheduled on the other side of the mechanical fastener, the narrow-band light source projects parallel strips light to the CCD/CMOS acquisition chip, The CCD/CMOS acquisition chip is electrically connected with the CCD/CMOS signal processing circuit unit, the CCD/CMOS signal processing Circuit unit is electrically connected with the microprocessor and data transmission interface circuit.

2. precision roundness measuring device according to claim 1, it is characterised in that: set on the CCD/CMOS acquisition chip There is optical filter, the narrow-band light source projection parallel strips light after the optical filter by the CCD/CMOS acquisition chip by being connect It receives.

3. precision roundness measuring device according to claim 1, it is characterised in that: the CCD/CMOS signal processing circuit Unit, microprocessor and data transmission interface circuit are arranged on the mechanical fastener.

4. precision roundness measuring device according to claim 1, it is characterised in that: the roundness measurement module is connected with flat Telephone-moving structure.

5. precision roundness measuring device according to claim 4, it is characterised in that: the translation mechanism includes lathe and knife Frame, the lathe are connect with the knife rest, and the roundness measurement module is fixed on the knife rest.

6. precision roundness measuring device according to claim 5, it is characterised in that: the lathe is connected with roller.

7. precision roundness measuring device according to claim 1, it is characterised in that: the microprocessor and data transmission connect Mouth circuit is electrically connected with computer.