CN116718098A - Online measurement device for coaxiality of main stay bar of helicopter and application method - Google Patents
Online measurement device for coaxiality of main stay bar of helicopter and application method Download PDFInfo
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- CN116718098A CN116718098A CN202310996634.6A CN202310996634A CN116718098A CN 116718098 A CN116718098 A CN 116718098A CN 202310996634 A CN202310996634 A CN 202310996634A CN 116718098 A CN116718098 A CN 116718098A
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- 238000005259 measurement Methods 0.000 title claims abstract description 54
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses an online measurement device for coaxiality of a main stay bar of a helicopter and an application method, which relate to the field of equipment detection and comprise the following steps: the workbench is provided with two V-shaped blocks with equal height in a opposite way; the magnetic gauge stand is arranged on the workbench, and is provided with two digital display dial gauges aligned with the upper element line and the lower element line of the vertical section of the main reducing brace rod; the test terminal is in communication connection with the digital display dial indicator; the upper element line and the lower element line of the vertical section of each digital display dial indicator and the main reducing brace rod are provided with compression amounts of 1-2 circles, and the V-shaped block is provided with a metal layer on the end face contacted with the main reducing brace rod. The invention provides an online measurement device for coaxiality of a main stay bar of a helicopter and an application method thereof, which can effectively realize automatic reading, transmission, filtering, calculation and storage of measurement data, ensure timeliness and objectivity of data acquisition and solve the problems of tedious filling of a detection report, missed filling and the like.
Description
Technical Field
The invention relates to the field of equipment detection. More particularly, the invention relates to an online measurement device for coaxiality of a main stay bar of a helicopter and an application method.
Background
Main reducing brace rod is as the important structure of connecting helicopter main reducer and organism, can normally work after in order to guarantee to avoid appearing local overheated, wearing and tearing, problem such as vibration, its axiality that need detect when overhauing, its detection accuracy requirement reaches 0.001mm, carries out following description to main axiality that reduces the brace rod among its prior art below:
1. preparing a work piece
The V-shaped blocks are placed on a cast iron flat plate, the level is adjusted, the middle section of the reference profile element of the main reducing brace rod is placed on two V-shaped blocks with equal height, and the reference axis is simulated by the V-shaped blocks.
2. Mounting dial gauge
The two dial gauges are respectively arranged on the magnetic gauge stand, the magnetic gauge stand is arranged on the cast iron platform, and the position and the height of the magnetic gauge stand are adjusted, so that the measuring head of the dial gauge is aligned with the upper element line and the lower element line of the vertical section of the main reducing brace rod, and the compression amount of 1-2 circles is reserved.
3. Zero calibration
And the zero point of the dial indicator is manually calibrated, so that the deviation value of the dial indicator at the initial measurement position is 0.
4. Measuring coaxiality
The main reducing brace rod is manually rotated slowly and uniformly for a circle, and the dial indicator can automatically display the deviation condition of the surface of the main reducing brace rod and the dial indicator. And respectively recording the dial indicator deviation of eight measuring points a week, and taking the difference value of the maximum reading and the minimum reading as the coaxiality error of the cross section.
5. Multipoint measurement
And rotating the main reducing stay bar, respectively detecting coaxiality of other different sections, and taking the maximum coaxiality error measured by each section as the coaxiality error of the part.
As can be seen from the above detection procedure, the disadvantage is that:
1. poor data reproducibility
Firstly, the dial indicator may touch the extruded main reducing stay bar in the manual zeroing process, so that the measurement accuracy is reduced. Then the rotation angle randomness is large, and the rotation angles of 8 measurement points in a circle are judged only by measurement experience.
2. The judgment accuracy is not high
In the existing measurement process, dial data change is visually read, coaxiality errors of all sections are manually calculated and compared, whether the measurement is in a process range or not is finally judged, the risk of human errors exists, and judgment accuracy is affected.
3. Low measurement efficiency
After the main stay bar, the V-shaped block and the dial indicator are installed, the dial indicator measuring head is contacted with the measured surface of the main stay bar, the worker rotates the main stay bar, reads on the dial indicator, visualizes the dial indicator in the rotating process, records the change of dial data, measures 4 positions in total in the measuring process, debugs 2 times, records 24 data, hands the worker to record and calculate data in the measuring process, judges whether the measuring process is in the process range, and fills the detection report by hands, so that the single measuring work efficiency is low, and the daily repair requirement of coaxial measurement of the main stay bar cannot be completely met.
Disclosure of Invention
It is an object of the present invention to address at least the above problems and/or disadvantages and to provide at least the advantages described below.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided an on-line measuring device for coaxiality of a main strut of a helicopter, comprising:
the workbench is provided with two V-shaped blocks with equal height in a opposite way;
the magnetic gauge stand is arranged on the workbench, and is provided with two digital display dial gauges aligned with the upper element line and the lower element line of the vertical section of the main reducing brace rod;
the test terminal is in communication connection with the digital display dial indicator;
the upper element line and the lower element line of the vertical section of each digital display dial indicator and the main reducing brace rod are provided with compression amounts of 1-2 circles, and the V-shaped block is provided with a metal layer on the end face contacted with the main reducing brace rod.
An application method of an on-line measuring device for coaxiality of a main stay bar of a helicopter comprises the following steps:
s1, preparing a measuring device;
s2, sending a zeroing signal to the digital display dial indicator through measurement software of the terminal, so that the deviation value of the initial measurement position of the digital display dial indicator is 0 under the condition that the dial indicator is not touched, and completing zero calibration;
s3, the measuring software sends a data acquisition signal to the digital display dial indicator at a preset interval time, and the digital display dial indicator is triggered to automatically send deviation data to the terminal so as to measure coaxiality deviation of the current section;
s4, simultaneously and slowly and uniformly rotating the main reducing brace rod for one circle to acquire a plurality of deviation data of coaxiality of the main reducing brace rod in different sections through a digital display dial indicator under the rotating state, and obtaining coaxiality errors of all sections through measuring software by taking the difference value of the maximum reading and the minimum reading;
and S5, using the maximum coaxiality error measured by each section as the coaxiality error of the part by the measuring software.
Preferably, the preparation of the measuring device includes:
s11, placing the V-shaped block on a workbench, and adjusting the level to be the same;
s12, placing the middle section of the basic outline element of the main stay bar on two equal-height V-shaped blocks;
s13, respectively mounting two digital display dial indicators on the magnetic meter seat;
s14, placing the magnetic gauge stand on the cast iron platform, and adjusting the position and the height of the magnetic gauge stand, so that the measuring head of the dial gauge is aligned to the upper and lower element lines of the vertical section of the main reducing brace rod, and the compression amount of 1-2 circles is reserved, thereby completing the preparation work before measurement.
Preferably, in S4-S5, the measurement software eliminates noise for the collected deviation data by using a kalman filter, and the elimination method is that coaxiality deviation data corresponding to all measurement points of a measurement workpiece are stored in a vector array to obtain;
processing data in the vector array through a Kalman filter to obtain a state variable and a covariance matrix;
for each state variable, it is compared to the expected value, if within the expected range, the state variable is considered to be the correct coaxiality error, otherwise it is determined not.
Preferably, the process of eliminating noise by using the deviation data is as follows:
defining a state transition matrix A, a measurement matrix H, a state noise covariance matrix Q and a measurement noise covariance matrix R:
wherein ,dtis the time step;
initializing a state variable x and a state covariance matrix P:
sequentially inputting a numerical value 0 and measured deviation data into a prediction formula, and taking a current input value as m:
synchronously updating initialization variables:
wherein y isRepresents the observed value, S represents the state covariance matrix, S -1 Represents the inverse of S, K represents the state transition matrix, x 1 Representing intermediate state variables, P 1 Representing an intermediate state variable covariance matrix;
will beAnd storing the difference value of each element in the estimated variable array e and the previous element in the estimated variable array e, filtering deviation data corresponding to elements with the difference value larger than the expected value from the vector array, and eliminating noise data in the measuring process.
Preferably, in S2, before sending the zeroing signal by the measurement software of the terminal, the method further comprises:
s20, the measurement software firstly transmits an acquisition signal to the digital display dial indicator;
s21, based on a communication protocol, the internal sensor of the digital display dial indicator returns to the measured value of the current digital display dial indicator;
s22, the measurement software judges whether the measured value is zero, and if not, a zeroing signal is sent to the digital display dial indicator.
Preferably, the measurement software is compiled by using an MVVM of the WPF interface frame, and comprises four modules of data acquisition, data analysis, data storage and data report.
The invention at least comprises the following beneficial effects:
1. high data repeatability
Firstly, the dial indicator zeroing method is changed from manual operation to remote zeroing through matched software, and the extrusion main reducing supporting rod cannot be touched. Then the rotation angle is easier to control, and the main stay bar is uniformly rotated within 8 seconds for one circle.
2. High determination accuracy
In the measuring process, dial data change does not need to be read visually, then coaxiality errors of all sections are calculated and compared manually, and finally whether the measured values are in a process range is judged. The method is changed into matched software for automatic reading, calculation and filtering, so that the risk of human errors is reduced, and the judgment accuracy is improved.
3. High measuring efficiency
And cumbersome work of visual recording, calculating, filtering data, manually filling detection reports and the like is omitted. The single measurement work efficiency is improved, and the daily repair requirement of the coaxial measurement of the main reducing brace rod is completely met.
4. Data structured storage
The generated detection report is automatically collected in a database, and the detection data can be studied and analyzed later.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of the hardware connection principle of the measuring device of the present invention;
FIG. 2 is a schematic side view of the V-block of the present invention mated with a primary reduction stay;
FIG. 3 is a flow chart of the operation of the measuring software of the on-line measuring device of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
1. On-line measurement hardware device
The main hardware functional block diagram of the on-line measuring device is shown in figures 1-2.
The device mainly comprises a digital display dial indicator 1, a cast iron flat plate (also called a workbench) 2, a V-shaped supporting block 3 (also called a V-shaped block or a V-shaped frame), a V-shaped metal layer matched with the V-shaped surface contacted with a main reduction supporting rod in practical application and used for reducing friction and guaranteeing the flatness of the surface, and a magnetic meter seat (not shown), wherein the dial indicator is a digital display dial indicator instead of a scale dial indicator. The digital dial indicator data transmission mode supports a USB transmission line and a wireless sensor.
The device judges the coaxiality of the main reducing brace rod 4 by reading the deviation value of the digital display dial indicator, the cast iron flat plate is used as a measuring reference surface in practical application, the V-shaped frame and the universal magnetometer base respectively support the main reducing brace rod and the digital display dial indicator, and the position of the V-shaped frame and the universal magnetometer base is kept unchanged in the measuring process. The digital display dial indicator is connected with the computer terminal 5, and the coaxiality value can be measured by rotating the position of the main reduction stay bar.
2. Matched on-line measuring software
The online measurement software is compiled by MVVM of the WPF interface frame, and has good expandability and maintainability. The software mainly realizes the input of basic data, the data reading of the digital display dial indicator, the calculation of coaxiality and the filtering function. The user can intuitively read the coaxiality value through the software, and save the measurement data and the result, and further, the software also supports paper output of the calculation result.
The software mainly comprises four modules of data acquisition, data analysis, data storage and data report. The data acquisition is carried out by reading serial data transmitted to the computer by the digital display dial indicator, the data analysis module can process and analyze the acquired data, the data storage module can store the data such as the measurement process, the result data and the basic information in the local database, and the data report module can generate a coaxiality test report of the main speed reducer stay bar.
Still further, the measurement software also has the following functions:
kalman filter noise cancellation
The main stay bar surface that subtracts occasionally has pit or protruding, and measuring software uses Kalman filter to eliminate the measuring point axiality at this moment, filters the defect point of work piece voluntarily, and in further detail, measuring software uses Kalman filter algorithm to eliminate measuring point axiality at this moment, and the flow of automatically filtering the defect point of work piece is:
firstly, defining a state transition matrix A, a measurement matrix H, a state noise covariance matrix Q and a measurement noise covariance matrix R:
where dt is the time step, defaulting to 0.1.
Then initializing a state variable x and a state covariance matrix P:
then, sequentially inputting the numerical value 0 and the measured value array into a prediction formula, and setting the input value as m:
synchronously updating initialization variables:
will beAnd storing the measured value array elements into an estimated variable array e, sequentially calculating the difference value between each element in the e and the previous element, filtering measured value array elements corresponding to elements with the difference value larger than 0.4, and eliminating noise data in the measuring process.
Remote zero calibration of digital display dial indicator
After the preparation work is finished, the matched software of the computer terminal is operated to send an acquisition instruction to the digital display dial indicator. According to the communication protocol, the internal sensor returns the measured value of the current digital display dial indicator. The matching software judges whether the measured value is zero, if not, a return-to-zero instruction PRE+/-000.000000 is sent to the digital display dial indicator, and the measured value is set to zero. The method can ensure that the deviation value is 0 when the initial measuring position is not touched on the dial indicator.
3. Timing acquisition of deviation data
The supporting software can be set to send the acquisition instruction to the digital display dial indicator at intervals of 1 second (capable of being set in a self-defining mode), the digital display dial indicator returns the deviation value of the current measurement point in real time, and the measurement efficiency is improved. The on-line measuring device and matched software are used for enabling two digital display dial indicators to be in contact with two measured surfaces of the supporting rod, a worker rotates the supporting rod, the measuring software automatically records 2 positions of one supporting rod, 8 times of installation and measurement are needed, 144 items of data are recorded, only 1 minute is needed for completing the measurement of one supporting rod, and after the measurement, the measuring software completes data processing and prints repair records.
The on-site acceptance is adopted, the service condition is good, the existing hardware resources and informatization means are researched and applied, the automatic acquisition and transmission of repair data, the automatic interpretation of the repair data and the automatic measurement of the data are realized, the integrity and the authenticity of the detection result of test data are improved, and meanwhile, the working intensity and time of operators and inspectors are reduced. The automatic reading, transmission, calculation and storage of the data in the measuring process are realized, the measuring accuracy is improved, the timeliness and objectivity of data acquisition are improved, and the problems of tedious record filling, misplacement filling and the like are solved. The invention provides a main speed reducer stay bar coaxiality measurement scheme which is high in precision and easy to operate, has a wide application prospect, and can be applied to the fields of machining, measurement and detection and the like.
Examples:
as shown in fig. 1-2, the process steps include:
1. preparation of work piece, installation of dial gauge
As shown in fig. 1-2, V-block 1 is placed on cast iron slab 2 and leveled. The middle section of the reference profile element of the main stay bar 3 is placed on two equal-height V-shaped blocks, from which the reference axis is simulated.
The two-piece digital display dial indicator 4 is respectively arranged on a magnetic gauge stand (not shown), the magnetic gauge stand is arranged on a cast iron platform, and the position and the height of the magnetic gauge stand are adjusted, so that the dial indicator measuring head is aligned with the upper element line and the lower element line of the vertical 5 section of the main reduction stay bar, and the compression amount of 1-2 circles is reserved.
2. Zero calibration
And the matched software of the computer terminal 6 is used for sending a return-to-zero instruction to the digital display dial indicator, so that the deviation value is ensured to be 0 when the dial indicator is at the initial measurement position under the condition of not touching the dial indicator.
3. Measuring coaxiality
And starting a measuring function of matched software of the computer terminal, wherein the software can send a data acquisition instruction to the digital display dial indicator at intervals of 1 second at the moment, and triggering the digital display dial indicator to automatically send deviation data to the computer terminal. Simultaneously, the main reducing stay bar is slowly and uniformly rotated for one circle manually or through other power mechanisms (motors), and the digital display dial indicator can automatically send deviation data to the computer terminal. The matching software automatically records the dial indicator deviation of eight measuring points in a week, and takes the difference between the maximum reading and the minimum reading as the coaxiality error of the section.
4. Kalman filter noise cancellation
The main reducing brace rod surface occasionally has pits or protrusions, the measuring software uses a Kalman filter to eliminate the coaxiality of the measuring points at the moment and automatically filters out the defect points of the workpiece, the method is that firstly, all coaxiality errors of the measuring points are stored in a vector array, then, the Kalman filter is used for processing data to obtain state variables and covariance matrixes, each state variable is compared with an expected value, if the state variable is in an expected range, the state variable is considered to be the correct coaxiality error, and otherwise, the state variable is not considered to be the correct coaxiality error.
5. Multipoint measurement
And rotating the main reducing stay bar, respectively detecting coaxiality of other different sections, and taking the maximum coaxiality error measured by each section as the coaxiality error of the part.
6. Report filling
The coaxiality test report can be generated and printed by the matched software data report module without filling the detection report by hand. And (5) finishing the detection appliance, and finishing the test.
The method can effectively realize automatic reading, transmission, filtering, calculation and storage of the measurement data, ensure timeliness and objectivity of data acquisition, and solve the problems of tedious filling of detection reports, missed filling and the like. In a specific application process, the work flow of the software matched with the online measuring device is shown in fig. 3, the function of the work flow is to realize automatic reading of the measured data through the measuring software matched with the device, the local storage of the process data, the automatic calculation of the shape and position errors, the formation of a detection record meeting the specification, the replacement of the original manual record and calculation, and the improvement of the accuracy. The method realizes automatic reading, transmission, calculation and storage of the data in the measuring process, ensures timeliness and objectivity of data acquisition, solves the problems of tedious record filling, error filling and the like, forms a complete closed-loop measuring process, and lays a foundation for fine control of the repairing process, structural conversion of repairing data and quantitative evaluation of overhaul quality. In the technical research process, the interface parameters of the high-precision metering appliance are searched, the data transmission protocol is accurately identified, the technical research is required to be carried out on acquisition of measurement data, secondary processing of the acquired data and the like, a large amount of development practice is required to be carried out, and finally, the online measurement technology is known and applied, so that the digital measurement of the product is realized.
The above is merely illustrative of a preferred embodiment, but is not limited thereto. In practicing the present invention, appropriate substitutions and/or modifications may be made according to the needs of the user.
The number of equipment and the scale of processing described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be readily apparent to those skilled in the art.
Although embodiments of the invention have been disclosed above, they are not limited to the use listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (7)
1. The utility model provides a helicopter owner subtracts stay axiality on-line measuring device which characterized in that includes:
the workbench is provided with two V-shaped blocks with equal height in a opposite way;
the magnetic gauge stand is arranged on the workbench, and is provided with two digital display dial gauges aligned with the upper element line and the lower element line of the vertical section of the main reducing brace rod;
the test terminal is in communication connection with the digital display dial indicator;
the upper element line and the lower element line of the vertical section of each digital display dial indicator and the main reducing brace rod are provided with compression amounts of 1-2 circles, and the V-shaped block is provided with a metal layer on the end face contacted with the main reducing brace rod.
2. An application method of an on-line measuring device for coaxiality of main stay bar of a helicopter according to claim 1, comprising the following steps:
s1, preparing a measuring device;
s2, sending a zeroing signal to the digital display dial indicator through measurement software of the terminal, so that the deviation value of the initial measurement position of the digital display dial indicator is 0 under the condition that the dial indicator is not touched, and completing zero calibration;
s3, the measuring software sends a data acquisition signal to the digital display dial indicator at a preset interval time, and the digital display dial indicator is triggered to automatically send deviation data to the terminal so as to measure coaxiality deviation of the current section;
s4, simultaneously and slowly and uniformly rotating the main reducing brace rod for one circle to acquire a plurality of deviation data of coaxiality of the main reducing brace rod in different sections through a digital display dial indicator under the rotating state, and obtaining coaxiality errors of all sections through measuring software by taking the difference value of the maximum reading and the minimum reading;
and S5, using the maximum coaxiality error measured by each section as the coaxiality error of the part by the measuring software.
3. The method for applying the helicopter main stay coaxiality online measurement device according to claim 2, wherein the preparation of the measurement device comprises the following steps:
s11, placing the V-shaped block on a workbench, and adjusting the level to be the same;
s12, placing the middle section of the basic outline element of the main stay bar on two equal-height V-shaped blocks;
s13, respectively mounting two digital display dial indicators on the magnetic meter seat;
s14, placing the magnetic gauge stand on the cast iron platform, and adjusting the position and the height of the magnetic gauge stand, so that the measuring head of the dial gauge is aligned to the upper and lower element lines of the vertical section of the main reducing brace rod, and the compression amount of 1-2 circles is reserved, thereby completing the preparation work before measurement.
4. The method for applying the helicopter main stay bar coaxiality online measurement device according to claim 2, wherein in the step S4-S5, the measurement software eliminates noise for collected deviation data through a Kalman filter, and the elimination method is that coaxiality deviation data corresponding to all measurement points of a measurement workpiece are stored in a vector array to obtain;
processing data in the vector array through a Kalman filter to obtain a state variable and a covariance matrix;
for each state variable, it is compared to the expected value, if within the expected range, the state variable is considered to be the correct coaxiality error, otherwise it is determined not.
5. The method for applying the helicopter main stay bar coaxiality online measurement device according to claim 4, wherein the process of eliminating noise by using deviation data is as follows:
defining a state transition matrix A, a measurement matrix H, a state noise covariance matrix Q and a measurement noise covariance matrix R:
wherein ,dtis the time step;
initializing a state variable x and a state covariance matrix P:
sequentially inputting a numerical value 0 and measured deviation data into a prediction formula, and taking a current input value as m:
synchronously updating initialization variables:
wherein y represents the observed value, S represents the state covariance matrix, S -1 Represents the inverse of S, K represents the state transition matrix, x 1 Representing intermediate state variables, P 1 Representing an intermediate state variable covariance matrix;
will beAnd storing the difference value of each element in the estimated variable array e and the previous element in the estimated variable array e, filtering deviation data corresponding to elements with the difference value larger than the expected value from the vector array, and eliminating noise data in the measuring process.
6. The method for applying the helicopter main stay coaxiality online measurement device according to claim 2, wherein in S2, before the zeroing signal is sent by the measurement software of the terminal, the method further comprises:
s20, the measurement software firstly transmits an acquisition signal to the digital display dial indicator;
s21, based on a communication protocol, the internal sensor of the digital display dial indicator returns to the measured value of the current digital display dial indicator;
s22, the measurement software judges whether the measured value is zero, and if not, a zeroing signal is sent to the digital display dial indicator.
7. The method for applying the helicopter main stay bar coaxiality online measurement device according to claim 2, wherein the measurement software is compiled by using an MVVM of a WPF interface frame and comprises four modules of data acquisition, data analysis, data storage and data report.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310996634.6A CN116718098B (en) | 2023-08-09 | 2023-08-09 | Online measurement device for coaxiality of main stay bar of helicopter and application method |
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| CN202310996634.6A CN116718098B (en) | 2023-08-09 | 2023-08-09 | Online measurement device for coaxiality of main stay bar of helicopter and application method |
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| CN116718098A true CN116718098A (en) | 2023-09-08 |
| CN116718098B CN116718098B (en) | 2023-10-17 |
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| CN (1) | CN116718098B (en) |
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Inventor after: Tian Chongchong Inventor after: Zhang Junjun Inventor after: Wang Liling Inventor after: Jian Guangjian Inventor after: Wei Qing Inventor after: Wang Jia Inventor after: Tang Cheng Inventor after: Jiang Shan Inventor after: Fu Bing Inventor after: Deng Qiwei Inventor before: Tian Chongchong Inventor before: Zhang Junjun Inventor before: Wang Liling Inventor before: Jian Guangjian Inventor before: Wei Qing Inventor before: Wang Jia Inventor before: Tang Cheng Inventor before: Jiang Shan Inventor before: Fu Bing Inventor before: Deng Qiwei |