CN104457543A - Rod displacement meter lot sample automatic calibration device and method - Google Patents
Rod displacement meter lot sample automatic calibration device and method Download PDFInfo
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- CN104457543A CN104457543A CN201410805471.XA CN201410805471A CN104457543A CN 104457543 A CN104457543 A CN 104457543A CN 201410805471 A CN201410805471 A CN 201410805471A CN 104457543 A CN104457543 A CN 104457543A
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Abstract
The invention discloses a rod displacement meter lot sample automatic calibration device. The device comprises a computer, a measurement control unit connected with the computer and a calibration rack connected with the measurement control unit. The calibration rack comprises a support, a servo motor arranged at one end of the support, a precise lead screw, a calibration instrument fixture moving base, a fixture used for fixing a sensor to be calibrated and a dial gauge, wherein the precise lead screw and the calibration instrument fixture moving base are in linkage with the servo motor. According to the rod displacement meter lot sample automatic calibration device, various technologies such as integrated sensors, software, machinery and electronics are combined, the interface is clear, operation is convenient, manual operation is not needed in the whole inspection process, time and labor are saved, and calibration accuracy and consistency are guaranteed.
Description
Technical field
The present invention relates to a kind of rod-type displacement meter calibration apparatus and method, particularly relate to the automatic calibration apparatus and method of a kind of rod-type displacement meter lot sample, belong to sensor detecting field.
Background technology
Rod-type displacement meter to be applicable to be laid in concrete structure or other material structure thing and surperficial, measure the opening degree (distortion) of works expansion joint or periphery fissure, also can be used for the displacement, depression, strain, slippage etc. of measuring the works such as earth dam, earth embankment, side slope, bridge; Therefore, very important to the measuring accuracy calibration of rod-type displacement meter, and prior art is all adopt artificial calibration, waste time and energy, and precision is not high.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides the automatic calibration apparatus and method of a kind of rod-type displacement meter lot sample.
The technical solution adopted in the present invention is:
The automatic calibration device of a kind of rod-type displacement meter lot sample, is characterized in that, the calibration frame comprising computing machine, the measure-controlling unit be communicated with computing machine and be communicated with measure-controlling unit; Described calibration frame comprises support, servomotor, accurate lead screw, calibration instrument clamps mobile base, fixture, dial gauge; Described servomotor is arranged on one end of support; And the input end of described servomotor is connected with measure-controlling unit; Described support comprises two back up pads be arrangeding in parallel of left and right, and described two back up pads are fixed steel pole by structure and are fixedly connected with; Described calibration instrument clamps mobile base, dial gauge are arranged on structure and fix on steel pole; Wherein one end of described fixture is arranged in a back up pad of support, and the other end is then arranged in calibration instrument clamps mobile base, and treats that the rod-type displacement meter of calibration is arranged in fixture; Wherein one end of described accurate lead screw is communicated with the output shaft of servomotor, the other end is then successively through another back up pad of the back up pad of support, calibration instrument clamps mobile base and support, and the back up pad of accurate lead screw and support is formed and is coupling, form screw pair structure with calibration instrument clamps mobile base.
Wherein, be provided with in described computing machine and be responsible for diagnosing in advance measure-controlling unit and servomotor state and the system diagnostics module of inline diagnosis; Be responsible for computing machine and measure-controlling unit communication and to measure-controlling unit sampling period, sampling periods, motor speed, revolution arranges and the measure-controlling unit of Discrete control controls and sampling module; Be responsible for the rod-type displacement meter calibration module that calibration rod-type displacement meter type is arranged, numbering is arranged, calibration formula is selected, calibration coefficient calculates automatically, calibration form generates automatically.
Further, described computing machine is connected with measure-controlling unit by RS-232 connection, and the integrated circuit that described measure-controlling unit is is core controller with MSP430 single-chip microcomputer; And this integrated circuit comprises circuit for controlling motor, displacement meter metering circuit and diagnostic circuit; Described circuit for controlling motor and diagnostic circuit are communicated with servomotor simultaneously, described displacement meter metering circuit then with treat that the rod-type displacement meter of calibration is communicated with.
Further, described support comprises four root architectures and fixes steel pole, and what be parallel to each other respectively is connected with back up pad four angles, two, left and right; And the wherein root architecture that described dial gauge is arranged on support bottom is fixed on steel pole; Two root architectures that described calibration instrument clamps mobile base is arranged on frame upper by linear bearing are fixed on steel pole.
Simultaneously, at least two rod-type displacement meter pickup grooves are formed in the back up pad of the support away from servomotor end and the end face correspondence of calibration instrument clamps mobile base, and described fixture is arranged on the top of pickup groove, and the contact jaw of fixture and pickup groove is also formed with groove, described groove forms the clip slot of rod-type displacement meter together with pickup groove, and fixture is fixed by clamping screw and grip nut with the back up pad and calibration instrument clamps mobile base forming pickup groove.
And be also provided with stage clip in the screw pair structure that formed of described accurate lead screw and calibration instrument clamps mobile base; Described accurate lead screw is connected by ball bearing with the back up pad of two on support; The helical pitch of described accurate lead screw is 2.5mm, rotates often step angle accurate lead screw axially move ahead or retreat 0.010mm by Serve Motor Control accurate lead screw.
Utilize the rod-type displacement meter lot sample automatic calibration device described in claim 1 to carry out a method for the automatic calibration of rod-type displacement meter lot sample, it is characterized in that, step is as follows:
(1) computer software control measure-controlling unit is first utilized; Measure-controlling unit starts servomotor by Electric Machine Control and signal cable; Servomotor drives accurate lead screw to rotate, and then calibration rod-type displacement meter is treated in push-and-pull;
(2) rotate all numbers by nominal pitch on accurate lead screw and accurate lead screw, therefore obtain and treat the displacement that calibration rod-type displacement meter is stretched or compressed, i.e. standard displacement;
(3) electricity that calibration rod-type displacement meter exports or light signal are treated in measure-controlling unit collection, according to signal and standard displacement, adopt Least absolute deviation or least square to calibration frame treats that corresponding calibration formula drafted out by calibration rod-type displacement meter;
(4) generate calibration form by computer software by specification, standard or user's requirement, record all check data, and change into Word document;
Wherein, described treats that type vibration wire, resistance-type, differential resistance type rod-type displacement meter are counted in the displacement of calibration rod-type, and range is 0 ~ 100mm; And the resolution of this method calibration is 0.010mm.
Beneficial effect of the present invention is: combine every technology such as integrated sensor, software, machinery, electronics, software operation interface is clear, easy to use, need not manual operation in the middle of whole checkout procedure, time saving and energy saving, and ensure that precision and the consistance of calibration.
accompanying drawing illustrates:
Fig. 1 is calibration shelf structure vertical view of the present invention;
Fig. 2 is calibration shelf structure left view of the present invention;
Fig. 3 is for the calibration shelf structure A shown in Fig. 1 of the present invention is to cut-open view;
Fig. 4 is for the calibration shelf structure B shown in Fig. 1 of the present invention is to cut-open view;
Fig. 5 is that major part of the present invention connects block diagram;
Fig. 6 is the typical displacement meter calibration table that the present invention adopts.
In figure, Main Reference Numerals implication is as follows:
1, servomotor, 2, accurate lead screw, 3, screw pair, 4, linear bearing, 5, ball bearing, 6, dial gauge, 7, structure fixes steel pole, 8, treat calibration rod-type displacement meter, 9, fixture, 10, calibration instrument clamps mobile base.
embodiment:
Below in conjunction with accompanying drawing, concrete introduction is done to the present invention.
As shown in figures 1 to 6: the automatic calibration device of a kind of rod-type displacement meter lot sample, the calibration frame comprising computing machine, the measure-controlling unit be communicated with computing machine and be communicated with measure-controlling unit; Described calibration frame comprises support, servomotor 1, accurate lead screw 2, calibration instrument clamps mobile base 10, fixture 9, dial gauge 6; Described servomotor 1 is arranged on one end of support; And the input end of described servomotor 1 is connected with measure-controlling unit; Described support comprises two back up pads be arrangeding in parallel of left and right, and described two back up pads are fixed steel pole 7 by structure and are fixedly connected with; Described calibration instrument clamps mobile base 10, dial gauge 6 are arranged on structure and fix on steel pole 7; In one of them back up pad that described fixture 9 is separately positioned on support and in calibration instrument clamps mobile base 10, and treat that the rod-type displacement meter 8 of calibration is arranged in fixture 9; Described accurate lead screw 2 through calibration instrument clamps mobile base 10, and forms screw pair 3 structure with calibration instrument clamps mobile base 10; And be also provided with stage clip in screw pair 3 structure that formed of described accurate lead screw 2 and calibration instrument clamps mobile base 10; Described accurate lead screw 2 two ends are connected with two back up pads of support respectively, and described accurate lead screw 2 is connected by ball bearing 5 with the back up pad of two on support; Wherein one end of described accurate lead screw 2 is also connected with servomotor 1 output shaft; The helical pitch of described accurate lead screw 2 is 2.5mm, control accurate lead screw 2 by servomotor 1 to rotate and often walk angle accurate lead screw 2 and axially move ahead or retreat 0.010mm, thus drive calibration instrument clamps mobile base 10 advance or retreat, thus calibration instrument is treated in axial compression or elongation.
In the present embodiment, be provided with in described computing machine and be responsible for diagnosing in advance measure-controlling unit and servomotor state and the system diagnostics module of inline diagnosis; Be responsible for computing machine and measure-controlling unit communication and to measure-controlling unit sampling period, sampling periods, motor speed, revolution arranges and the measure-controlling unit of Discrete control controls and sampling module; Be responsible for the rod-type displacement meter calibration module that calibration rod-type displacement meter type is arranged, numbering is arranged, calibration formula is selected, calibration coefficient calculates automatically, calibration form generates automatically; Described computing machine is connected with measure-controlling unit by RS-232 connection, and the integrated circuit that described measure-controlling unit is is core controller with MSP430 single-chip microcomputer; And this integrated circuit comprises circuit for controlling motor, displacement meter metering circuit and diagnostic circuit; Described circuit for controlling motor and diagnostic circuit are communicated with servomotor 1 simultaneously, described displacement meter metering circuit then with treat that the rod-type displacement meter 8 of calibration is communicated with.
In addition, in order to the stability supported, described support comprises four root architectures and fixes steel pole 7, and what be parallel to each other respectively is connected with back up pad four angles, two, left and right; And the wherein root architecture that described dial gauge 6 is arranged on support bottom is fixed on steel pole 7; Two root architectures that described calibration instrument clamps mobile base 10 is arranged on frame upper by linear bearing 4 are fixed on steel pole 7.
And at least two rod-type displacement meter pickup grooves are being formed away from the support back up pad of servomotor 1 end and the end face correspondence of calibration instrument clamps mobile base 10, and described fixture 9 is arranged on the top of pickup groove, and fixture 9 is also formed with groove with the contact jaw of pickup groove, described groove forms the clip slot of rod-type displacement meter together with pickup groove, and fixture 9 is fixed by clamping screw and grip nut with the back up pad and calibration instrument clamps mobile base 10 forming pickup groove.
Utilize above-mentioned rod-type displacement meter lot sample automatic calibration device to carry out the method for the automatic calibration of rod-type displacement meter lot sample, step is as follows:
(1) computer software control measure-controlling unit is first utilized; Measure-controlling unit starts servomotor 1 by Electric Machine Control and signal cable; Servomotor 1 drives accurate lead screw 2 to rotate, and then calibration rod-type displacement meter 8 is treated in push-and-pull;
(2) rotate all numbers by nominal pitch on accurate lead screw 2 and accurate lead screw 2, therefore obtain and treat the displacement that calibration rod-type displacement meter 8 is stretched or compressed, i.e. standard displacement;
(3) electricity that calibration rod-type displacement meter 8 exports or light signal are treated in measure-controlling unit collection, according to signal and standard displacement, adopt Least absolute deviation or least square to calibration frame treats that corresponding calibration formula drafted out by calibration rod-type displacement meter 8;
(4) generate calibration form by computer software by specification, standard or user's requirement, record all check data, and change into Word document;
Wherein, described treats that calibration rod-type displacement meter 8 is for type vibration wire, resistance-type, differential resistance type rod-type displacement meter, and range is 0 ~ 100mm; And the resolution of this method calibration is 0.010mm.
specific works process:
Computer application software mainly contains three zones module: (1) system diagnostics module; Be responsible for measure-controlling unit and servomotor 1 state are diagnosed and inline diagnosis in advance, guarantee measure-controlling unit and servomotor 1 working properly, when abnormal propose sound and light alarm; (2) measure-controlling unit control and sampling arrange module; Communication between this module in charge computer and measure-controlling unit, is responsible for arranging and Discrete control measure-controlling unit sampling period, sampling periods, motor speed, revolution; (3) sensor calibration module; The functions such as this module in charge calibration sensor type is arranged, numbering is arranged, calibration formula is selected, calibration coefficient calculates automatically, sensor calibration form generates automatically.
As shown in Figure 5 and Figure 6: by computer controlled measurement control module, measure-controlling unit controls to start servomotor 1 by Electric Machine Control and signal cable, servomotor 1 drives accurate lead screw 2 to rotate, and accurate lead screw 2 rotates and pulls calibration instrument clamps mobile base 10; Rotate all numbers by nominal pitch on accurate lead screw 2 and accurate lead screw 2 and can obtain the displacement (mm) treating that calibration rod-type displacement meter 8 is stretched or compressed, this displacement is as standard displacement (approximate true value); Measure-controlling unit is by treating that the communication cable collection of calibration rod-type displacement meter 8 treats that calibration rod-type displacement meter 8 exports electricity or light signal simultaneously, according to signal and standard displacement, by Least absolute deviation or least square to calibration frame treats that corresponding calibration formula drafted out by calibration rod-type displacement meter 8; Automatically generate corresponding calibration form on computers by specification, standard or user's requirement simultaneously and change into Word document, convenient printing, editor.
Whole device adopts electromechanical integration and modular design, and hardware is made up of computing machine, measure-controlling unit and calibration frame.Be provided with application software in computing machine, described application software, by multiple calibration formula algorithm, comprises Least absolute deviation and least-squares algorithm is embedded in software; Software adopts the C# based on .net platform to develop, and friendly interface is portable strong; There is provided multiple calibration formula to select simultaneously, comprise linear calibration formula and non-linear (quadratic polynomial and exponential form) calibration formula; Realize the control survey to system and calibration data processing.Measure-controlling unit forms for core with MSP430 single-chip microcomputer, comprises circuit for controlling motor and displacement meter metering circuit and diagnostic circuit and forms.Calibration frame is primarily of support and adopt digital servomotor 1, accurate lead screw 2, calibration instrument clamps mobile base 10, fixture 9, the dial gauge 6 exchanged of high precision to form, treat that calibration rod-type displacement meter 8 is fixed on calibration frame by fixture 9, treat that calibration rod-type displacement meter cable directly accesses measure-controlling unit.For length different treat calibration rod-type displacement meter 8, can by adjustment fixture 9 position even calibration frame length realize calibration.At calibration frame, wherein calibration rod-type displacement meter 8 pickup groove is treated on a back up pad and reserved one or at least two of calibration instrument clamps mobile base 10 top, calibration can be carried out to one or at least two rod-type displacement meters simultaneously, can realize treating that calibration rod-type displacement meter 8 is fixed to different-diameter according to rod-type displacement meter pickup groove and fixture 9 Aided design, thus realize the calibration to different-diameter rod-type displacement meter.High precision digital ac servo motor 1 can rotate on request and stop under measure-controlling unit controls, many grades are divided into according to instrument rate provisioning request, every grade advance or backway between hold-up time determined by apparatus measures time and stabilization time, it is 2 seconds (adjustable) that such as potentiometer type machine motors revolves stop time between two grades, and vibrating wire instrument is 4 seconds (adjustable); Thus drive accurate lead screw 2 to realize many grades of calibrations by the segmentation of high precision digital ac servo motor 1.Described accurate lead screw 2 one end is connected with servomotor 1 output shaft through a back up pad of support, and the other end is connected with another back up pad of support through calibration instrument clamps mobile base 10; Described accurate lead screw 2 adopts the wear-resistant precise ball screw of stainless steel, and screw lead is 2.5mm, controls accurate lead screw 2 rotate and necessarily walk angle by servomotor 1, often walks angle screw axis 0.010mm forward or backward, the resolution of Here it is calibration device of the present invention.Total makes full use of physical construction and ensures that bracket stable is firm; Accurate lead screw 2 screw thread is even, pitch consistent, is also provided with special stage clip, avoids gap error in screw pair 3 structure that supporting accurate lead screw 2 and calibration instrument clamps mobile base 10 are formed; Two root architectures that calibration instrument clamps mobile base 10 is arranged on frame upper by linear bearing 4 are fixed on steel pole 7; Ensure stationarity during instrument calibration.
Present invention incorporates every technology such as integrated sensor, software, machinery, electronics, software operation interface is clear, easy to use, need not manual operation in the middle of whole checkout procedure, time saving and energy saving, and ensure that precision and the consistance of calibration.
Above-described embodiment does not limit the present invention in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.
Claims (10)
1. the automatic calibration device of rod-type displacement meter lot sample, is characterized in that, the calibration frame comprising computing machine, the measure-controlling unit be communicated with computing machine and be communicated with measure-controlling unit; Described calibration frame comprises support, servomotor, accurate lead screw, calibration instrument clamps mobile base, fixture, dial gauge; Described servomotor is arranged on one end of support; And the input end of described servomotor is connected with measure-controlling unit; Described support comprises two back up pads be arrangeding in parallel of left and right, and described two back up pads are fixed steel pole by structure and are fixedly connected with; Described calibration instrument clamps mobile base, dial gauge are arranged on structure and fix on steel pole; Wherein one end of described fixture is arranged in a back up pad of support, and the other end is then arranged in calibration instrument clamps mobile base, and treats that the rod-type displacement meter of calibration is arranged in fixture; Wherein one end of described accurate lead screw is communicated with the output shaft of servomotor, the other end is then successively through another back up pad of the back up pad of support, calibration instrument clamps mobile base and support, and the back up pad of accurate lead screw and support is formed and is coupling, form screw pair structure with calibration instrument clamps mobile base.
2. the automatic calibration device of a kind of rod-type displacement meter lot sample according to claim 1, is characterized in that, is provided with and is responsible for diagnosing in advance measure-controlling unit and servomotor state and the system diagnostics module of inline diagnosis in described computing machine; Be responsible for computing machine and measure-controlling unit communication and to measure-controlling unit sampling period, sampling periods, motor speed, revolution arranges and the measure-controlling unit of Discrete control controls and sampling module; Be responsible for the rod-type displacement meter calibration module that calibration rod-type displacement meter type is arranged, numbering is arranged, calibration formula is selected, calibration coefficient calculates automatically, calibration form generates automatically.
3. the automatic calibration device of a kind of rod-type displacement meter lot sample according to claim 1, it is characterized in that, described computing machine is connected with measure-controlling unit by RS-232 connection, and the integrated circuit that described measure-controlling unit is is core controller with MSP430 single-chip microcomputer; And this integrated circuit comprises circuit for controlling motor, displacement meter metering circuit and diagnostic circuit; Described circuit for controlling motor and diagnostic circuit are communicated with servomotor simultaneously, described displacement meter metering circuit then with treat that the rod-type displacement meter of calibration is communicated with.
4. the automatic calibration device of a kind of rod-type displacement meter lot sample according to claim 1, it is characterized in that, described support comprises four root architectures and fixes steel pole, and what be parallel to each other respectively is connected with back up pad four angles, two, left and right; And the wherein root architecture that described dial gauge is arranged on support bottom is fixed on steel pole; Two root architectures that described calibration instrument clamps mobile base is arranged on frame upper by linear bearing are fixed on steel pole.
5. the automatic calibration device of a kind of rod-type displacement meter lot sample according to claim 1, it is characterized in that, at least two rod-type displacement meter pickup grooves are formed in the back up pad of the support away from servomotor end and the end face correspondence of calibration instrument clamps mobile base, and described fixture is arranged on the top of pickup groove, and the contact jaw of fixture and pickup groove is also formed with groove, described groove forms the clip slot of rod-type displacement meter together with pickup groove, and fixture is fixed by clamping screw and grip nut with the back up pad and calibration instrument clamps mobile base forming pickup groove.
6. the automatic calibration device of a kind of rod-type displacement meter lot sample according to claim 1, is characterized in that, is also provided with stage clip in the screw pair structure that described accurate lead screw and calibration instrument clamps mobile base are formed; Described accurate lead screw is connected by ball bearing with the back up pad of two on support.
7. the automatic calibration device of a kind of rod-type displacement meter lot sample according to claim 6, is characterized in that, the helical pitch of described accurate lead screw is 2.5mm, is rotated by Serve Motor Control accurate lead screw, often walks angle accurate lead screw and axially moves ahead or retreat 0.010mm.
8. utilize the rod-type displacement meter lot sample automatic calibration device described in claim 1 to carry out a method for the automatic calibration of rod-type displacement meter lot sample, it is characterized in that, step is as follows:
(1) computer software control measure-controlling unit is first utilized; Measure-controlling unit starts servomotor by Electric Machine Control and signal cable; Servomotor drives accurate lead screw to rotate, and then calibration rod-type displacement meter is treated in push-and-pull;
(2) rotate all numbers by nominal pitch on accurate lead screw and accurate lead screw, therefore obtain and treat the displacement that calibration rod-type displacement meter is stretched or compressed, i.e. standard displacement;
(3) electricity that calibration rod-type displacement meter exports or light signal are treated in measure-controlling unit collection, according to signal and standard displacement, adopt Least absolute deviation or least square to calibration frame treats that corresponding calibration formula drafted out by calibration rod-type displacement meter;
(4) generate calibration form by computer software by specification, standard or user's requirement, record all check data, and change into Word document.
9. the method for the automatic calibration of a kind of rod-type displacement meter lot sample according to claim 8, is characterized in that, described treats that type vibration wire, resistance-type, differential resistance type rod-type displacement meter are counted in the displacement of calibration rod-type, and range is 0 ~ 100mm.
10. the method for the automatic calibration of a kind of rod-type displacement meter lot sample according to claim 8, is characterized in that, the resolution of calibration is 0.010mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410805471.XA CN104457543B (en) | 2014-12-23 | 2014-12-23 | A kind of automatic calibration apparatus and method of rod-type displacement meter lot sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410805471.XA CN104457543B (en) | 2014-12-23 | 2014-12-23 | A kind of automatic calibration apparatus and method of rod-type displacement meter lot sample |
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| CN104457543A true CN104457543A (en) | 2015-03-25 |
| CN104457543B CN104457543B (en) | 2018-01-05 |
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| CN104457543B (en) | 2018-01-05 |
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