CN206583924U - A kind of rotating shaft rotation-speed measuring device based on variable density sine streak - Google Patents
A kind of rotating shaft rotation-speed measuring device based on variable density sine streak Download PDFInfo
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- CN206583924U CN206583924U CN201621259511.6U CN201621259511U CN206583924U CN 206583924 U CN206583924 U CN 206583924U CN 201621259511 U CN201621259511 U CN 201621259511U CN 206583924 U CN206583924 U CN 206583924U
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- rotating shaft
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Abstract
The utility model is related to a kind of rotating shaft rotation-speed measuring device based on variable density sine streak, including a variable density sine streak sensor, is arranged at shaft circumference surface to be measured, the angle position to encode the rotating shaft to be measured；One high-speed image sampling and transport module, to carry out continuous imaging and record to the variable density sine streak sensor in the rotating shaft to be measured, and the stripe pattern signal collected are transmitted to computer；One computer, is stored and is handled to be controlled to the high-speed image sampling and transport module, and to the stripe pattern signal for being transferred to computer.The device can realize the non-cpntact measurement to rotating shaft rotating speed in certain range of speeds, and device is simple, and measuring speed is fast, and precision is high.
Description
Technical field
The utility model is related to optical measurement rotating technique field, more particularly to a kind of based on variable density sine streak
Rotating shaft rotation-speed measuring device.
Background technology
The measurement of corner and rotating speed has very important function and significance in some engineering fields, and such as pump and motor turn
The tachometric survey of the rotating shaft of dynamic equipment；The status information of these rotating machinerys can be obtained and can use by the rotational parameters of measurement
In the condition monitoring and fault diagnosis of machine.For example, bearing is to rotate very important a kind of part in machinery, prolonged
The abrasion of bearing local defect, such as bearing inner race, outer ring or roller is likely to result under operating, these defects will cause interior
Portion is impacted or impulse oscillation, and these defect informations can be analyzed by the characteristic signal to bearing transient speed and obtained.
At present, rotating shaft tachometric survey technology is broadly divided into following three kinds：Mechanical measurement, electric measurement and optics are surveyed
Amount.Mechanical speed meter in Mechanical measurement method multiple tooth wheel disc is arranged in rotating shaft measure rotate machinery corner and
Rotating speed, this Mechanical measurement method typically requires some additional structures being arranged on tumbler, can so cause to survey
Amount is inconvenient and increases the input of equipment.Can be using the magnetic induction sensor or quiet such as based on magnetoresistance in electric measurement
Electric transducer countershaft position and rotating speed are measured, but electric measuring method may introduce electromagnetic interference etc..In recent years
Come, with the progress of imaging sensor manufacturing process, vibration and tachometric survey technology based on machine vision are also fast-developing.This
Kind of technology has high efficiency, a noncontact, and the characteristics of do not introduce additional mass.Many researchers propose based on machine vision
Rotating speed measurement method, these methods mainly is obtained by the characteristic matching and track algorithm of different images frame template image
The rotary speed information of rotating shaft, measuring speed and precision are heavily dependent on speed and the degree of accuracy of image matching algorithm.And
Need the image information in the whole measuring surface of measurement object being acquired when carrying out IMAQ, local feature could be carried out
The tracking and matching of signal.Large-scale IMAQ can not only cause acquisition system burden, and to the biography of picture signal
Defeated speed it is also proposed the high requirement of comparison.
Therefore, on the basis of existing rotating speed measurement method is understood and studied, design it is a kind of accurate, simple and
Efficient non-contact type tachometric measurement apparatus is significant, can not increase the measuring system hardware cost based on machine vision
In the case of realize the real-time measurement of shaft rotary corner and rotating speed.
The content of the invention
In view of this, the purpose of this utility model is to provide a kind of rotating shaft tachometric survey dress based on variable density sine streak
Put, measurement apparatus is simple.
The utility model is realized using following scheme：A kind of rotating shaft rotation-speed measuring device based on variable density sine streak,
Including：
One variable density sine streak sensor, is arranged at shaft circumference surface to be measured, to encode the rotating shaft to be measured
Angle position；
One high-speed image sampling and transport module, to enter to the variable density sine streak sensor in the rotating shaft to be measured
Row continuous imaging and record, and the stripe pattern signal collected is transmitted to computer；
One computer, to be controlled to the high-speed image sampling and transport module, and to being transferred to computer
Stripe pattern signal is stored and handled.
Further, the variable density sine streak sensor is the lightweight paster for specially designing and printing, and the change is close
The front for spending sine streak sensor lightweight paster is stripe pattern, and the back side is viscous layer, and sticks in the rotating shaft circle to be measured
Perimeter surface.
Further, the variable density sine streak sensor is shaped as rectangle, and the variable density sine streak passes
The front of sensor is the stripe pattern changed along sensor length direction sine streak density linear, the variable density sine streak
The length of sensor is equal with the girth of surveyed rotating shaft；It is before measurement, rectangle variable density sine streak sensor edge is long
Degree direction ring is affixed on shaft circumference surface, the rotational angle of survey rotating shaft to encode.
Further, the different fringe densities of the variable density sine streak sensor for being pasted on rotating shaft surface and rotating shaft 0-
Different angles in 2 π corners are corresponded, and shaft rotary corner information can be obtained by calculating fringe density.
Further, the high-speed image sampling and transport module include high-speed image sampling module and high speed image transmission
Module, the high-speed image sampling module includes imaging sensor and optical imaging lens, the high speed image transport module bag
Data transmission module is included, the data transmission module is data wire.
Further, the acquisition frame rate of the high-speed image sampling module and imaging sensor collection pixel coverage are adjustable,
The high-speed image sampling module is positioned over the rotating shaft surface to be measured for being covered with variable density sine streak sensor and rotating shaft core
Vertical front so that the variable density sine streak sensor can blur-free imaging in the high-speed image sampling module
Imaging sensor centre position.
Further, the imaging sensor also includes linear array imaging sensor and face battle array imaging sensor；When it is described into
During as sensor for linear array imaging sensor, the cost of device can be saved.
Further, when the imaging sensor is face battle array imaging sensor, the face battle array imaging sensor is imaging model
Adjustable face battle array imaging sensor is enclosed, it is sinusoidal that imaging width is arranged suitable for the variable density by the face battle array imaging sensor
The width size of striped sensor, and set in re-imaging length direction in a row or several row pixels, to reduce imaged striation figure
The size of picture, improves the space of transmission frame per second and reduction storage.
In the utility model, a kind of implementation method of the rotating shaft tachometric survey based on variable density sine streak, including with
Lower step：
Step S1：Variable density sine streak sensor is arranged in rotating shaft to be measured, and adjusts high-speed image sampling mould
The image space of block, makes striped image in the centre position of imaging sensor in high-speed image sampling module；
Step S2：With the rotation of rotating shaft to be measured, the variable density sine streak sensor on its surface also concomitant rotation is pasted,
Continuous imaging and record are carried out to striped sensor using high-speed image sampling module；The position of the high-speed image sampling module
It is fixed, the density of imaged striation changes also with the change of axis of rotation angle in imaging sensor；
Step S3：The stripe pattern sequence collected is transferred to computer by high speed image transport module, to stripe signal
Handled, calculate the instantaneous angular velocity and rotating speed of rotating shaft
Brief description of the drawings
Fig. 1 is the apparatus structure schematic diagram of the utility model embodiment.
Fig. 2 is the relation between variable density sine streak schematic diagram and fringe density and corner in the utility model embodiment
Schematic diagram.
Fig. 3 is the imaging geometry figure and image processing flow of the utility model embodiment high speed image capture module
Schematic diagram.
In figure, 1- computers, 2- data transmission modules, 3- high-speed image sampling modules, 4- optical imaging lens, 5- becomes close
Sine streak sensor, 6- rotating shafts to be measured, 7- image capture positions and striped are spent, 8- array image sensors, 9- imagings are sinusoidal
Stripe signal.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the utility model is described in further detail.
Fig. 1 is the apparatus structure schematic diagram of the utility model embodiment.It is based on as shown in figure 1, the present embodiment provides one kind
The rotating shaft rotation-speed measuring device of variable density sine streak, including variable density sine streak sensor 5, high-speed image sampling module 3,
Data transmission module 2, computer 1, image processing software module and surveyed rotating shaft 6.Variable density sine streak sensor 5, is set
In the circumferential surface of rotating shaft 6 to be measured, the corner information for encoding rotating shaft 6 to be measured.High-speed image sampling module 3, for treating
The variable density sine streak sensor 5 surveyed in rotating shaft 6 carries out continuous imaging and record, and the stripe pattern collected is passed through into number
Computer 1 is transferred to according to transport module 2.
Fig. 2 is the schematic diagram and fringe density and corner of variable density sine streak sensor 5 in the utility model embodiment
Between relation schematic diagram.In the present embodiment, variable density sine streak sensor 5 is shaped as rectangle, variable density sine bar
The front of line sensor 5 is the stripe pattern changed along sensor length direction sine streak density linear, variable density sine bar
The length of line sensor 5 is equal with the girth of surveyed rotating shaft 6.Before measurement, by the rectangle variable density sine streak sensor 5
Ring is affixed on the circumferential surface of surveyed rotating shaft 6 along its length, and just making variable density sine streak sensor 5, intactly ring is affixed on institute
Survey the surface of rotating shaft 6.The sine streak density of variable density sine streak sensor 5 fromd sLinear change is arrivedd e, so, it is pasted on
The different fringe densities of the variable density sine streak sensor on the surveyed surface of rotating shaft 6 and the different angles in rotating shaft 0-2 π corners are one by one
Correspondence.
Fig. 2 is a kind of variable density sine streak sensor for being used to measure axis of rotation parameter in the utility model embodiment
Schematic diagram.In actual engineering survey, the sensor of different strip forms can be designed according to the characteristics of structure, or adopt
With spraying striped etc. in rotating shaft, the unlisted all a variety of strip forms of this patent or stickup form, but be based on
The measurement that method of the present utility model is carried out belongs to protection domain of the present utility model.
Fig. 3 is the imaging geometry figure and image procossing stream of the utility model embodiment high speed image capture module 3
Journey schematic diagram.In the present embodiment, it is main by 8 groups of optical imaging lens 4 and array image sensor for high-speed image sampling module 3
Into.Arrange variable density sine streak sensor 5 in rotating shaft 6 to be measured, and adjust high-speed image sampling module 3 into image position
The focal length with optical imaging lens 4 is put, the sine streak striped of the left side wire tag position of variable density sine streak sensor 5 is believed
Number 7 blur-free imagings are in the centre position of imaging sensor 8.The imaging width of imaging sensor 8 is arranged suitable for variable density
The width of sine streak sensor 5, and set in re-imaging length direction in a row or several row pixels, to reduce imaged striation figure
The size of picture, improves transmission frame per second, reduces the space of data storage.With the rotation of rotating shaft 6 to be measured, the change for pasting its surface is close
The also concomitant rotation of sine streak sensor 5 is spent, high-speed image sampling module 3 is to the left side lines of variable density sine streak sensor 5
Mark image space carries out continuous imaging and record.The density of imaging sine streak signal 9 changes also with axis of rotation,
Shaft rotary corner information, then the time domain corner for passing through acquisition can be obtained by the fringe density being calculated as sine streak signal 9
The sample frequency of signal and camera draws the tach signal of surveyed rotating shaft 6.
The present embodiment additionally provides the rotating shaft rotating speed measurement method using said apparatus, as shown in Figure 1,2 and 3, including with
Lower step：
Step S1：Variable density sine streak sensor 5 is arranged in rotating shaft 6 to be measured, and adjusts high-speed image sampling
The image space of module 3, makes striped image in the centre position of the imaging sensor 8 of high-speed image sampling module 3；
Step S2：With the rotation of rotating shaft 6 to be measured, the variable density sine streak sensor 5 for pasting its surface also turns therewith
It is dynamic, continuous imaging and record are carried out to striped sensor using high-speed image sampling module 3；Because high-speed image sampling module 3
Position be fixed, so the density that sine streak signal 9 is imaged in imaging sensor 8 becomes also with axis of rotation
Change；
Step S3：The stripe pattern sequence collected is transferred to computer 1 by high speed image transport module 3, to imaging just
String stripe signal 9 is further processed, and calculates the instantaneous angular velocity and rotating speed of rotating shaft.
Above is preferred embodiment of the present utility model, all changes made according to technical solutions of the utility model are produced
Function without departing from technical solutions of the utility model scope when, belong to protection domain of the present utility model.
Claims (8)
1. a kind of rotating shaft rotation-speed measuring device based on variable density sine streak, it is characterised in that：Including
One variable density sine streak sensor, is arranged at shaft circumference surface to be measured, the corner to encode the rotating shaft to be measured
Position；
One high-speed image sampling and transport module, to connect to the variable density sine streak sensor in the rotating shaft to be measured
Continuous imaging and record, and the stripe pattern signal collected is transmitted to computer；
One computer, to be controlled to the high-speed image sampling and transport module, and to being transferred to the striped of computer
Picture signal is stored and handled.
2. a kind of rotating shaft rotation-speed measuring device based on variable density sine streak according to claim 1, it is characterised in that：
The variable density sine streak sensor is lightweight paster, and the front of the variable density sine streak sensor lightweight paster is bar
Print image, the back side is viscous layer, and sticks in the shaft circumference surface to be measured.
3. a kind of rotating shaft rotation-speed measuring device based on variable density sine streak according to claim 2, it is characterised in that：
The variable density sine streak sensor is shaped as rectangle, and the front of the variable density sine streak sensor is along sensing
The stripe pattern of device length direction sine streak density linear change, the length of the variable density sine streak sensor is with being surveyed
The girth of rotating shaft is equal；Before measurement, by the rectangle variable density sine streak sensor, ring is affixed on rotating shaft circle along its length
Perimeter surface, the rotational angle of survey rotating shaft to encode.
4. a kind of rotating shaft rotation-speed measuring device based on variable density sine streak according to claim 3, it is characterised in that：
It is described to be pasted on the different fringe densities of the variable density sine streak sensor on rotating shaft surface and the different angles in rotating shaft 0-2 π corners
Degree is corresponded.
5. a kind of rotating shaft rotation-speed measuring device based on variable density sine streak according to claim 1, it is characterised in that：
The high-speed image sampling and transport module include high-speed image sampling module and high speed image transport module, the high speed image
Acquisition module includes imaging sensor and optical imaging lens, and the high speed image transport module includes data transmission module, institute
Data transmission module is stated for data wire.
6. a kind of rotating shaft rotation-speed measuring device based on variable density sine streak according to claim 5, it is characterised in that：
Acquisition frame rate and imaging sensor the collection pixel coverage of the high-speed image sampling module are adjustable, the high-speed image sampling mould
Block is positioned over the rotating shaft surface to be measured front vertical with rotating shaft core for being covered with variable density sine streak sensor, so that institute
State variable density sine streak sensor can blur-free imaging in the imaging sensor centre position of the high-speed image sampling module.
7. a kind of rotating shaft rotation-speed measuring device based on variable density sine streak according to claim 5, it is characterised in that：
The imaging sensor also includes linear array imaging sensor and face battle array imaging sensor.
8. a kind of rotating shaft rotation-speed measuring device based on variable density sine streak according to claim 7, it is characterised in that：
When the imaging sensor is face battle array imaging sensor, the face battle array imaging sensor is that the adjustable face battle array imaging of areas imaging is passed
Sensor, the width that imaging width is arranged suitable for the variable density sine streak sensor by the face battle array imaging sensor is big
It is small, and set in re-imaging length direction in a row or several row pixels, to reduce the size of imaged striation image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621259511.6U CN206583924U (en) | 2016-11-23 | 2016-11-23 | A kind of rotating shaft rotation-speed measuring device based on variable density sine streak |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621259511.6U CN206583924U (en) | 2016-11-23 | 2016-11-23 | A kind of rotating shaft rotation-speed measuring device based on variable density sine streak |
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| CN201621259511.6U Active CN206583924U (en) | 2016-11-23 | 2016-11-23 | A kind of rotating shaft rotation-speed measuring device based on variable density sine streak |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018095213A1 (en) * | 2016-11-23 | 2018-05-31 | 福州大学 | Apparatus and method for measuring rotational speed of rotary shaft based on variable density sinusoidal fringe |
| WO2018161717A1 (en) * | 2017-03-09 | 2018-09-13 | 福州大学 | Rotation speed measuring device and method employing two sinusoidal variable density fringes |
| CN113447670A (en) * | 2021-06-25 | 2021-09-28 | 福州大学 | Rotation speed measuring method and system for monocular linear array visual tracking stripe coding mark |
-
2016
- 2016-11-23 CN CN201621259511.6U patent/CN206583924U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018095213A1 (en) * | 2016-11-23 | 2018-05-31 | 福州大学 | Apparatus and method for measuring rotational speed of rotary shaft based on variable density sinusoidal fringe |
| US11579162B2 (en) | 2016-11-23 | 2023-02-14 | Fu Zhou University | Apparatus and method for measuring rotational speed of rotary shaft based on variable density sinusoidal fringe |
| WO2018161717A1 (en) * | 2017-03-09 | 2018-09-13 | 福州大学 | Rotation speed measuring device and method employing two sinusoidal variable density fringes |
| CN113447670A (en) * | 2021-06-25 | 2021-09-28 | 福州大学 | Rotation speed measuring method and system for monocular linear array visual tracking stripe coding mark |
| CN113447670B (en) * | 2021-06-25 | 2022-08-16 | 福州大学 | Rotation speed measuring method and system for monocular linear array visual tracking stripe coding mark |
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