CN201532393U - Laser rotating speed measuring instrument - Google Patents
Laser rotating speed measuring instrument Download PDFInfo
- Publication number
- CN201532393U CN201532393U CN2009202409845U CN200920240984U CN201532393U CN 201532393 U CN201532393 U CN 201532393U CN 2009202409845 U CN2009202409845 U CN 2009202409845U CN 200920240984 U CN200920240984 U CN 200920240984U CN 201532393 U CN201532393 U CN 201532393U
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- laser
- displacement sensor
- rotating speed
- laser displacement
- measuring instrument
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Abstract
The utility model relates to a laser rotating speed measuring instrument, which is used for measuring rotating speed of various devices and belongs to the technical field of instrument structures. The laser rotating speed measuring instrument is characterized by comprising a laser displacement sensor arranged on a fixed support, the laser displacement sensor is connected with a controller of the laser displacement sensor through a cable, the controller of the laser displacement sensor is in connection communication with a computer used for acquiring and processing measurement data, one side of the laser displacement sensor is provided with a measured rotating workpiece, the computer is used for reading the measurement data of the laser displacement sensor, the measurement data is in difference separation by aid of a multi-level filter algorithm, and then rotating speed of an measured object is calculated, thereby synchronously controlling a laser CCD displacement sensor 1, performing data processing at real time and displaying measurement results. The laser rotating speed measuring instrument is high in measurement precision, simple in structure, convenient in use and simple and convenient in operation, and can integrally measure automatically.
Description
Technical field
The utility model relates to a kind of laser tachometer of measuring, is used to measure the rotating speed of various device, belongs to the surveying instrument technical field of structures.
Background technology
At present, whether laser tachometric survey instrument is an electromechanical equipment manufacturing visual plant, contact with the equipment of testing the speed according to tested rotary body, is divided into contact type measurement and non-contact measurement.When adopting the contact method to carry out velocity survey, because the error that the mechanical wear and the usually generation of skidding are difficult to eliminate.The non-contact measurement for rotation speed method can overcome above-mentioned measuring error, constantly improves the non-contact measurement for rotation speed technology and is subjected to people's attention more.
Summary of the invention
The purpose of this utility model is to provide a kind of precision height, simple in structure, easy to use, easy and simple to handle, intelligent, the laser tachometer of measuring that can carry out surperficial Non-Destructive Testing and lossless detection to a precise part rotating speed.
The utility model belongs to the new instrument of a kind of advanced person's high precision non-contact laser tachometric survey.Innovation is embodied in the laser and CCD displacement transducer and gathers measurement data, and the emission of laser beam and catoptrical reception are finished by same sensor.Apparatus structure is simple, and size has only 12cm * 10cm * 3cm, and spot diameter 20-150 μ m can the interference of filtering surface roughness to measuring.Selecting laser and CCD displacement transducer resolution for use is 0.1 μ m, and minimal sampling time is spaced apart 100 μ s, and useful range is 0～80mm, and the installation site is in distance measured target surface 20mm～200mm scope.The workpiece rotational frequency that can accurately measure sample point changes.
Measurand is measured diameter range from 5mm to 5000mm in the experiment, and measuring rotating speed is to obtain accurate measurement result from 5 rev/mins to 6000 rev/mins, is not measured diameter restrictions in theory, applied widely.This instrument has the precision height, and good stability is arranged, and in high precision tachometric survey field good using value is arranged.
Technical solutions of the utility model are as follows:
The laser tachometer of measuring, special character is to comprise the laser displacement sensor 1 that is installed on the fixed support 3, laser displacement sensor 1 links to each other with the controller 2 of laser displacement sensor by cable, the controller 2 of laser displacement sensor is connected communication by USB interface with the computing machine 4 that is used to gather with handling measurement data, one side of laser displacement sensor 1 is provided with tested rotational workpieces 5, with calculating machine-readable measurement data of getting laser displacement sensor 1, and by the multiple-stage filtering algorithm count difference from, calculate the rotating speed of measured target then, realize synchro control laser and CCD displacement transducer 1, carry out data processing in real time and show measurement result.
The utility model laser tachometer of measuring has the following advantages:
The first, simple in structure, this surveying instrument has only been installed the laser and CCD displacement transducer on a fixed support, easy to use, simple to operate, safe and reliable, and data acquisition and processing (DAP) is directly calculated with computer, shows measurement result in real time.
The second, the utility model automaticity is higher, calculates function and realizes multinomial work such as data acquisition and data processing synchronously; With high-precision laser displacement transducer image data; Classification filtering algorithm and small echo major component filtering algorithm, intelligentized data processing software has improved Instrument measuring precision.
The 3rd, this instrument can be realized striding the yardstick workpiece rotational frequency and measure, measuring object diameter range 10mm-5000mm, and rotating speed is from 5 rev/mins to 6000 rev/mins.
Description of drawings
Fig. 1: laser tachometer of measuring structural drawing.
Fig. 2: measuring principle figure.
In the drawings, the controller 2 of laser displacement sensor 1, laser displacement sensor, fixed support 3, computing machine 4, tested rotational workpieces 5.
Embodiment
Following with reference to accompanying drawing, provide embodiment of the present utility model, be used for formation of the present utility model is further specified.
Present embodiment is studied around the off-line measurement technology on the basis to noncontact measurement research, requires design proposal according to the enterprise practical measuring accuracy.
The laser tachometer of measuring is with reference to figure 1,2, by the controller 2 of laser displacement sensor 1, laser displacement sensor, laser displacement sensor 1 is installed on the fixed support.Laser displacement sensor 1 links to each other with the controller 2 of laser displacement sensor by cable, the controller 2 of laser displacement sensor is communicated by letter with computing machine 4 by USB interface, gather multinomial functions such as measurement data and data processing with computational data, computing machine carries out data processing and shows measurement result.
Measuring method:
Present embodiment is with reference to figure 2, and mobile laser tachometer of measuring is near the measured workpiece surface, in entering laser displacement sensor 1 effective range, survey crew is set initial parameter according to actual conditions on computing machine 4, as: the workpiece model, between measurement zone, data sampling density etc.After beginning to measure, computing machine 4 is gathered the laser displacement sensor measurement data in real time.Software systems record measurement data is carried out data processing simultaneously, preserves raw data, shows measurement result.
Measuring principle:
As shown in Figure 2, workpiece at the uniform velocity rotates with respect to the laser and CCD displacement transducer during measurement.Measuring system scans the cross section of measured workpiece under the control of special software.The A point is the reference zero of laser and CCD displacement transducer, P
i(Δ
i, φ
i) (i=1,2,3......n is the sequence number of the point that scans on each cross section) and being being scanned a little on the surface of the work, O is the rotation center of workpiece, Δ
iBe the laser and CCD reading of this point, φ
iIt is this angle that turns over respect to scanning cross-section starting point workpiece.So signal s={ Δ that obtains scanning
i, i=1,2,3......n}.
This instrument selection laser and CCD displacement transducer image data, its measuring principle adopts triangulation, records the displacement of object by inspected object surface reflection laser beam position change of imaging on Li-CCD.Characteristics such as the laser and CCD displacement transducer has that low temperature floats, precision height, sample rate are fast, good stability.The time interval of image data, I reached 1 microsecond, and data acquisition density is big, and the data volume of collection is abundant.Very outstanding aspect accuracy, resolution reaches 0.6 μ m, measurement range selection scope 20mm-200mm.High rigidity die casting fuselage has effectively reduced the deviation that produces because of temperature variation.
After with error separating algorithm and small echo-principal component analysis algorithm the signal of laser and CCD displacement transducer collection being carried out error separating, surface roundness or rotating shaft turn error are measured rotating speed when utilizing rotary body to rotate.Carry out data acquisition and data processing with microcomputer control laser and CCD displacement transducer, separate with high frequency noise with the low frequency signal of small echo multifrequency analytical approach signal, signal after will separating according to sampling thheorem carries out frequency and extracts, and realizes measuring rotating speed.
Claims (1)
1. laser tachometer of measuring, it is characterized in that comprising the laser displacement sensor (1) that is installed on the fixed support (3), laser displacement sensor (1) links to each other with the controller (2) of laser displacement sensor by cable, the controller of laser displacement sensor (2) is connected communication by USB interface with being used to gather with the computing machine of handling measurement data (4), and a side of laser displacement sensor (1) is provided with tested rotational workpieces (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202409845U CN201532393U (en) | 2009-11-04 | 2009-11-04 | Laser rotating speed measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202409845U CN201532393U (en) | 2009-11-04 | 2009-11-04 | Laser rotating speed measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201532393U true CN201532393U (en) | 2010-07-21 |
Family
ID=42527796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202409845U Expired - Fee Related CN201532393U (en) | 2009-11-04 | 2009-11-04 | Laser rotating speed measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201532393U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712561A (en) * | 2014-01-20 | 2014-04-09 | 上海博泽电机有限公司 | Testing method and testing device of cooling assembly with jump testing function and rotating-speed testing function |
| CN104181323B (en) * | 2013-05-24 | 2017-02-01 | 深圳市海洋王照明工程有限公司 | Hand-cranked power generator speed measuring tooling |
| CN107505475A (en) * | 2017-10-13 | 2017-12-22 | 河海大学 | A kind of measurement apparatus and method of rotating shaft transient speed and throw based on laser |
-
2009
- 2009-11-04 CN CN2009202409845U patent/CN201532393U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181323B (en) * | 2013-05-24 | 2017-02-01 | 深圳市海洋王照明工程有限公司 | Hand-cranked power generator speed measuring tooling |
| CN103712561A (en) * | 2014-01-20 | 2014-04-09 | 上海博泽电机有限公司 | Testing method and testing device of cooling assembly with jump testing function and rotating-speed testing function |
| CN107505475A (en) * | 2017-10-13 | 2017-12-22 | 河海大学 | A kind of measurement apparatus and method of rotating shaft transient speed and throw based on laser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100721 Termination date: 20111104 |