CN109238125B - Blade displacement calibration control method and control system - Google Patents
Blade displacement calibration control method and control system Download PDFInfo
- Publication number
- CN109238125B CN109238125B CN201810904721.3A CN201810904721A CN109238125B CN 109238125 B CN109238125 B CN 109238125B CN 201810904721 A CN201810904721 A CN 201810904721A CN 109238125 B CN109238125 B CN 109238125B
- Authority
- CN
- China
- Prior art keywords
- blade
- displacement
- measured
- adjusting
- voltage value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003750 conditioning effect Effects 0.000 claims description 18
- 238000012360 testing method Methods 0.000 abstract description 13
- 230000003068 static effect Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a blade displacement calibration control method and a control system, wherein the control method comprises the following steps: respectively adjusting the positions of the measured blade and the displacement sensor along the third direction, and/or adjusting the included angles between the tenon of the measured blade and the displacement sensor and the first preset line respectively, and adjusting the spatial attitude of the measured blade; adjusting the relative position between the measured blade and the displacement sensor to obtain an initial voltage value and an initial displacement value; adjusting the relative position between the measured blade and the displacement sensor along the first direction, and/or adjusting the position of the measured blade along the second direction to obtain a voltage value and a displacement value; and fitting the initial voltage value, the initial displacement value, the voltage value and the displacement value to obtain the relation of the voltage value changing along with the displacement distance. The invention can simulate real blades to carry out static and dynamic calibration tests without processing blade and blade disc models, thereby saving a large amount of cost.
Description
Technical Field
The invention belongs to the technical field of aero-engines, and particularly relates to a blade displacement calibration control method and a control system.
Background
The measurement of the clearance between the tip of the engine rotor blade and the casing (blade tip clearance, abbreviated as TC) is a key technology for engine testing. In the prior art, two modes, namely a static manual calibration system and a dynamic automatic calibration system, are mainly adopted to measure the rotor blade tip clearance, but the mode of adopting the static manual calibration system has low automation degree, generally needs 0.5-1 h to complete a single-point calibration test, has low calibration efficiency, and is easy to cause the condition of calibration failure due to misoperation; the dynamic automatic calibration system is adopted, the calibration efficiency is high, but the calibration precision is very low, the vibration of the calibration platform is large due to the adoption of the rotating mechanism, the calibration accuracy is generally not higher than 0.01mm, and the test requirement cannot be met.
Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned problems of the prior art.
Disclosure of Invention
It is an object of the present invention to provide a blade displacement calibration control method and control system that overcomes or at least alleviates at least one of the above-mentioned problems of the prior art.
In order to achieve the above object, the present invention provides a blade displacement calibration control method, including: respectively adjusting the positions of the measured blade and the displacement sensor along a third direction, and/or adjusting the included angles between the tenon of the measured blade and the displacement sensor and a first preset line respectively, and adjusting the spatial attitude of the measured blade; adjusting the relative position between the measured blade and a displacement sensor to enable the measured blade to be in a zero position, and acquiring an initial voltage value and an initial displacement value; adjusting the relative position between the measured blade and the displacement sensor along a first direction, and/or adjusting the position of the measured blade along a second direction, and acquiring a voltage value and a displacement value; and fitting the initial voltage value, the initial displacement value, the voltage value and the displacement value to obtain the relation of the voltage value changing along with the displacement distance.
In a preferred embodiment of the above control method, before calibrating the blade to be measured, the control method further includes: respectively adjusting the distance between the measured blade and the displacement sensor along the first direction and/or the third direction to obtain a first feedback signal; adjusting the position of the blade to be measured along the second direction to obtain a second feedback signal; and determining whether the equipment normally operates according to the first feedback signal and the second feedback signal.
In another aspect, the present invention further provides a blade displacement calibration control system, which includes a linear motor driver, a displacement angle controller, a signal conditioning module, and a micron-scale sensor, which are electrically connected, wherein the linear motor driver is configured to adjust the position of a blade to be measured along a second direction; the displacement angle controller is configured to adjust the relative position between the measured blade and the displacement sensor along a first direction, and/or is configured to adjust the positions of the measured blade and the displacement sensor along a third direction, and/or is configured to adjust the included angles between the displacement sensor and the tenon of the measured blade and a first preset line; the signal conditioning module is configured to detect a voltage value and an initial voltage value; and the micron-scale sensor is used for detecting an initial displacement value and a displacement value.
In the preferable technical scheme of the control system, the control system further comprises an industrial personal computer, and the industrial personal computer is electrically connected with the linear motor driver, the displacement angle controller, the signal conditioning module and the micron-sized sensor respectively.
The technical scheme includes that the blade displacement calibration control method is matched with a control system to be used, free selection of four modes of static manual calibration, static automatic calibration, dynamic manual calibration and dynamic automatic calibration is achieved, test efficiency is greatly improved under the condition that measurement accuracy is guaranteed, and test time for completing single-point calibration is shortened to 20 s; the seven-axis combined control and the position information feedback are received for the first time, the automation degree is extremely high, four-way voltage data acquisition and input are realized, and a data table is automatically generated; the dynamic calibration test is carried out by utilizing the linear reciprocating motion to replace the traditional rotating mechanism, the test accuracy is greatly improved, the static and dynamic calibration test can be carried out by adopting the real blade, the blade and blade disc model does not need to be processed, and a large amount of cost is saved.
Drawings
FIG. 1 is a schematic flow chart of a control method provided by an embodiment of the invention;
FIG. 2 is a circuit diagram for zeroing according to an embodiment of the present invention;
fig. 3 is a block diagram of a control system according to an embodiment of the present invention.
Reference numerals:
1. an industrial personal computer; 2. a linear motor driver; 3. a displacement controller; 4. a signal conditioning module; 5. micron-sized sensor
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the scope of the present invention and that the terms "first" and "second" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.
The embodiment of the invention provides a blade displacement calibration control method and a control system, which are used for measuring a corresponding relation curve of the distance of blade displacement and corresponding voltage.
The first direction, the second direction and the third direction provided by the embodiment of the present invention are perpendicular to each other, for example, the first direction is an x-axis, the second direction is a y-axis and the third direction is a z-axis in a three-dimensional coordinate system.
The following describes the technical solution of the present invention in detail by taking the first direction as the x-axis, the second direction as the y-axis and the third direction as the z-axis in the three-dimensional coordinate system as an example.
Fig. 1 is a schematic flow chart of a control method according to an embodiment of the present invention, and as shown in fig. 1, the blade displacement calibration control method includes the following steps:
and s101, respectively adjusting the positions of the measured blade and the displacement sensor along a third direction, and/or adjusting the included angle between the tenon of the measured blade and the first preset line of the displacement sensor, and adjusting the spatial attitude of the measured blade.
And s102, adjusting the relative position between the measured blade and the displacement sensor to enable the measured blade to be in a zero point position, and acquiring an initial voltage value and an initial displacement value.
The measured blade is in contact with the displacement sensor through adjustment, and the voltage output by the displacement sensor after the contact is zero, namely the measured blade is located at a zero position.
It should be noted that, referring to fig. 2, the positive pole of the 24V power supply is connected with the support plate, and the support plate is connected with the blade to be tested, it can be understood that the support plate and the blade to be tested are electrically connected, the negative pole of the 24V power supply is connected with the zero setting device indicator light and the blade displacement sensor, and the zero setting device indicator light is conducted with the blade displacement sensor, and the blade to be tested is contacted with the displacement sensor by adjusting the relative position between the blade to be tested and the displacement sensor, so that the circuit shown in fig. 2 is conducted, and the zero setting device indicator light is turned on at this time.
And s103, adjusting the relative position between the measured blade and the displacement sensor along the first direction, and/or adjusting the positions of the measured blade and the displacement sensor along the second direction respectively, and acquiring a voltage value and a displacement value.
It should be noted that, the step s101 and the step s102 may be executed simultaneously, or may be executed separately, or the step s102 may be executed first, and then the step s101 may be executed, and a specific execution manner thereof may be flexibly set by a person skilled in the art in practical application, and is not limited herein.
As will be appreciated by those skilled in the art, the vanes are mounted on a shaft of the engine, which is driven to rotate by the engine, and the displacement sensors are typically located on or outside of a circle on which the vanes rotate.
Taking the first direction as the radial direction of the engine, the second direction as the circumferential direction of the engine and the third direction as the axial direction of the engine as an example, the distance between the measured blade and/or the displacement sensor is adjusted in the first direction, the second direction and the third direction to simulate the distance between the blade and the displacement sensor in the real rotation process of the blade, and the distance is expressed by a voltage value and a displacement value.
In the dynamic calibration test, the measured blade and/or the displacement sensor are adjusted in the first direction and the second direction simultaneously to simulate the movement of the blade in the radial direction and the circumferential direction of the engine, the displacement value of the measured blade is output through the micron-sized sensor, and meanwhile, the voltage value corresponding to the measured blade is output through the bit signal conditioning module (namely, the displacement sensor).
In the static calibration test, the position of the measured blade is adjusted in the first direction, namely the motion of the blade in the radial direction of the engine is simulated, the displacement value of the measured blade is output through the micron-sized sensor, and meanwhile, the voltage value corresponding to the measured blade is output through the signal conditioning module (namely, the displacement sensor).
In the actual assembly process of the blade, the blade tenon plane is a standard plane and is perpendicular to the axial direction of the engine, so that in the test process, a real assembly position needs to be simulated, a standard parallel plane is arranged below the measured blade, the included angle between the measured blade tenon along the first direction and a first preset line is adjusted, the installation position of the measured blade is calibrated, and the measured blade is kept consistent with the installation position angle of the actual blade, wherein the first preset line can be the axial line of the engine.
And s104, fitting the initial voltage value, the initial displacement value, the voltage value and the displacement value to obtain the relation of the voltage value changing along with the displacement distance.
In the embodiment of the present invention, the following data are obtained through actual measurement:
| feedback signal displacement value of micron-sized sensor | Signal voltage value fed back by signal conditioning module |
| 0.305 | 6.992 |
| 0.504 | 4.572 |
| 0.701 | 3.239 |
| 0.912 | 2.395 |
| 1.223 | 1.615 |
| 1.549 | 1.159 |
| 1.854 | 0.846 |
| 2.141 | 0.630 |
| 2.432 | 0.491 |
| 2.726 | 0.367 |
| 3.021 | 0.294 |
Fitting the displacement value and the voltage value to obtain a cubic curve, wherein the cubic curve equation is as follows:
y＝-0.9497x3+6.1282x2-13.147x+10.081。
when the blade to be measured is calibrated, the calibration equipment needs to be checked to verify whether the calibration equipment can work normally, and specifically, the following steps need to be executed before step s101 is executed:
and s201, respectively adjusting the distance between the measured blade and the displacement sensor along the first direction and/or the third direction to acquire a first feedback signal.
And s202, adjusting the position of the blade to be detected along the second direction to obtain a second feedback signal.
And s203, determining whether the equipment normally operates according to the first feedback signal and the second feedback signal.
In this embodiment, whether the equipment normally operates can be known according to the feedback signal by adjusting the measured blade and the displacement sensor in the first direction, the second direction and the third direction respectively. For example, if the distance between the measured blade and the displacement sensor is changed, the voltage signal fed back by the signal conditioning module will change in an increasing or decreasing trend, which indicates that the device can operate normally; if the distance between the measured blade and the displacement sensor is changed, the feedback signal is not changed, or the feedback model is not available, the equipment cannot normally operate.
In another aspect, the present invention provides a blade displacement calibration control system, as shown in fig. 3, including a linear motor driver, a displacement angle controller, and a signal conditioning module, which are electrically connected.
Wherein the linear motor driver is configured to adjust the position of the blade under test in a second direction; the displacement angle controller is configured to adjust the relative position between the measured blade and the displacement sensor along the first direction, and/or is configured to adjust the positions of the measured blade and the displacement sensor along the third direction, and/or is configured to adjust the included angles between the displacement sensor and the tenon of the measured blade and the first preset line; the signal conditioning module is configured to detect a voltage value and an initial voltage value; the micron-scale sensor is used for detecting an initial displacement value and a displacement value.
As will be appreciated by those skilled in the art, the vanes are mounted on a shaft of the engine, which is driven to rotate by the engine, and the displacement sensors are typically located on or outside of a circle on which the vanes rotate.
Taking the first direction as the radial direction of the engine, the second direction as the circumferential direction of the engine and the third direction as the axial direction of the engine as an example, the distance between the measured blade and/or the displacement sensor is adjusted in the first direction, the second direction and the third direction to simulate the distance between the blade and the displacement sensor in the real rotation process of the blade, and the distance is expressed by a voltage value and a displacement value.
And simultaneously adjusting the measured blade and/or the displacement sensor in the first direction and the second direction to simulate the movement of the blade in the radial direction and the circumferential direction of the engine, outputting the displacement value of the measured blade through the micron-sized sensor, and outputting the corresponding voltage value of the measured blade through the signal conditioning module (namely the displacement sensor).
In the first direction, the position of the blade to be measured is adjusted, namely the blade is simulated to move in the radial direction of the engine, the displacement value of the blade to be measured is output through a micron-sized sensor, and the voltage value corresponding to the blade to be measured is output through a signal conditioning module (displacement sensor).
In some optional embodiments, the control system further includes an industrial personal computer, the industrial personal computer is electrically connected to the linear motor driver, the displacement angle controller, the signal conditioning module and the micron-scale sensor, and the industrial personal computer is used for supplying power to the linear motor driver, the displacement angle controller, the signal conditioning module and the micron-scale sensor, controlling the linear low-level driver and the displacement angle controller to execute corresponding operations, and reading corresponding feedback of the linear motor driver, the displacement angle controller, the signal conditioning module and the micron-scale sensor.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A blade displacement calibration control method is characterized by comprising
Respectively adjusting the positions of the measured blade and the displacement sensor along the third direction, and adjusting the included angles between the tenon of the measured blade and the displacement sensor and the first preset line respectively, so as to adjust the spatial attitude of the measured blade; adjusting the relative position between the measured blade and a displacement sensor to enable the measured blade to be in a zero position, and acquiring an initial voltage value and an initial displacement value; adjusting the relative position between the measured blade and the displacement sensor along a first direction, adjusting the position of the measured blade along a second direction, and acquiring a voltage value and a displacement value; fitting the initial voltage value, the initial displacement value, the voltage value and the displacement value to obtain a relation of the voltage value changing along with the displacement distance;
wherein,
the third direction is the axial direction of the engine
The first preset line is an axis of the engine;
the first direction is radial to the engine;
the second direction is a circumferential direction of the engine.
2. The blade displacement calibration control method according to claim 1, wherein before the blade to be measured is calibrated, the control method further comprises adjusting distances between the blade to be measured and the displacement sensor in the first direction and the third direction, respectively, to obtain a first feedback signal; adjusting the position of the blade to be measured along the second direction to obtain a second feedback signal; and determining whether the equipment normally operates according to the first feedback signal and the second feedback signal.
3. The blade displacement calibration control system is characterized by comprising a linear motor driver, a displacement angle controller, a signal conditioning module and a micron-sized sensor which are electrically connected, wherein the linear motor driver is configured to adjust the position of a blade to be measured along a second direction; the displacement angle controller is configured to adjust the relative position between the measured blade and the displacement sensor along a first direction, adjust the positions of the measured blade and the displacement sensor along a third direction respectively, and adjust the included angles between the displacement sensor and the tenon of the measured blade and the first preset line respectively; the signal conditioning module is configured to detect a voltage value and an initial voltage value; the micron-scale sensor is used for detecting an initial displacement value and a displacement value;
wherein,
the third direction is the axial direction of the engine
The first preset line is an axis of the engine;
the first direction is radial to the engine;
the second direction is a circumferential direction of the engine.
4. The blade displacement calibration control system according to claim 3, further comprising an industrial personal computer electrically connected to the linear motor driver, the displacement angle controller, the signal conditioning module, and the micron-scale sensor, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810904721.3A CN109238125B (en) | 2018-08-09 | 2018-08-09 | Blade displacement calibration control method and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810904721.3A CN109238125B (en) | 2018-08-09 | 2018-08-09 | Blade displacement calibration control method and control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109238125A CN109238125A (en) | 2019-01-18 |
| CN109238125B true CN109238125B (en) | 2020-08-11 |
Family
ID=65070645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810904721.3A Active CN109238125B (en) | 2018-08-09 | 2018-08-09 | Blade displacement calibration control method and control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109238125B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719732A (en) * | 2022-06-08 | 2022-07-08 | 中国航发四川燃气涡轮研究院 | Static calibration method and device for blade tip clearance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661707A (en) * | 2012-04-10 | 2012-09-12 | 中国人民解放军海军航空工程学院 | Universal calibrating device for linear displacement |
| CN107524477A (en) * | 2016-06-20 | 2017-12-29 | 中国航发商用航空发动机有限责任公司 | For eliminating the instrument and method of High Pressure Turbine Rotor blade joint gap |
| CN206905694U (en) * | 2017-05-17 | 2018-01-19 | 四川天利科技有限责任公司 | A kind of automatic tip clearance test system calibrating installation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9341462B2 (en) * | 2013-10-09 | 2016-05-17 | Siemens Energy, Inc | Sensor for measuring blade tip clearance in gas turbines |
| CN105588509A (en) * | 2015-12-16 | 2016-05-18 | 中国航空工业集团公司沈阳发动机设计研究所 | Dynamic measurement system for blade tip clearance |
| CN106482694A (en) * | 2016-12-06 | 2017-03-08 | 中国航空工业集团公司北京长城计量测试技术研究所 | Tip clearance measurement sensor dynamic calibration apparatus under hot environment |
| CN108931223B (en) * | 2018-07-06 | 2020-06-05 | 中国航空工业集团公司北京长城计量测试技术研究所 | Dynamic calibration system and calibration method for blade tip clearance measurement sensor |
-
2018
- 2018-08-09 CN CN201810904721.3A patent/CN109238125B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661707A (en) * | 2012-04-10 | 2012-09-12 | 中国人民解放军海军航空工程学院 | Universal calibrating device for linear displacement |
| CN107524477A (en) * | 2016-06-20 | 2017-12-29 | 中国航发商用航空发动机有限责任公司 | For eliminating the instrument and method of High Pressure Turbine Rotor blade joint gap |
| CN206905694U (en) * | 2017-05-17 | 2018-01-19 | 四川天利科技有限责任公司 | A kind of automatic tip clearance test system calibrating installation |
Non-Patent Citations (1)
| Title |
|---|
| 航空发动机转子叶尖间隙及同心度变化规律研究;张龙;《燃气涡轮试验与研究》;20170228;第44-47页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109238125A (en) | 2019-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10145682B2 (en) | Reduction of errors of a rotating device used during the determination of coordinates of a workpiece or during the machining of a workpiece | |
| CN105051489B (en) | Method for correcting angular deviation when coordinate measuring apparatus is run | |
| CN103365246B (en) | Device for the error correction of Digit Control Machine Tool | |
| US9009000B2 (en) | Method for evaluating mounting stability of articulated arm coordinate measurement machine using inclinometers | |
| CN106908240B (en) | Online testing device and testing method for thermal error of machine tool spindle | |
| CN110567639B (en) | Multi-axis force sensor calibration method and calibration device | |
| CN106643576B (en) | Method and device for measuring non-concentricity | |
| CN108188835B (en) | Machine vision-based numerical control machine tool spindle thermal elongation testing device and testing method | |
| JP2019014035A (en) | Monitoring and evaluation method of cnc machine geometry error and accuracy | |
| CN109238721B (en) | Blade displacement calibrating device | |
| CN109238125B (en) | Blade displacement calibration control method and control system | |
| CN109759897A (en) | A kind of measurement of the horizontal assembly of large size shell and aligning method | |
| CN109540382A (en) | A kind of active control sine Inertia Based on Torsion Pendulum Method rotational inertia measuring device and method | |
| CN100458361C (en) | Inclinometer zero point and sensitivity temperature compensation device and compensation method thereof | |
| JP2017530345A (en) | A coordinate measurement method and apparatus for inspecting a workpiece, the method comprising the step of generating a measurement correction value using a reference shape that is known not to deviate substantially from an ideal form. Coordinate measuring method and apparatus for inspecting workpiece | |
| CN108927533B (en) | The angle correction method and computer readable storage medium of rotary shaft | |
| CN110220451A (en) | A kind of Electromagnetic Treatment bearing axis circumferential surface device for testing deformation amount and its detection method | |
| CN113405517B (en) | Method, device and system for assembling parts of aero-engine and industrial personal computer | |
| CN109297691B (en) | Detection equipment and method for parameters of smoke machine | |
| CN212513104U (en) | Encoder calibration system | |
| CN110631539A (en) | Eccentric shaft system with angular position self-checking and automatic calibration functions | |
| CN115773729A (en) | Device and method for measuring coaxiality of rotor unit in assembly state of aircraft engine | |
| CN103630234A (en) | Automatic detection system for illuminometer | |
| KR100900897B1 (en) | Rotor shaft center measuring apparatus in a rotation system by memory and rotor shaft center measuring method by using the same | |
| CN117681053A (en) | Method, system, equipment and medium for detecting dynamic motion error of numerical control machine tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |