CN112857300B - Precision calibration device and method for gap sensor - Google Patents
Precision calibration device and method for gap sensor Download PDFInfo
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- CN112857300B CN112857300B CN202110060134.2A CN202110060134A CN112857300B CN 112857300 B CN112857300 B CN 112857300B CN 202110060134 A CN202110060134 A CN 202110060134A CN 112857300 B CN112857300 B CN 112857300B
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention provides a precision calibration device for a gap sensor and a calibration method thereof, wherein the device comprises a fixed bottom plate, a display, a server, a calibration instrument, a servo motor, a sliding table component, a support and the calibration instrument positioned in the support, wherein the support is provided with a positioning component which positions and fixes a sensor to be calibrated, parameters are input in the server to control the servo motor to operate, the servo motor drives a reciprocating sliding table, a push plate is driven by a reciprocating platform and a sliding plate to perform reciprocating translation, so that the calibration instrument and the sensor to be calibrated are driven to synchronously perform periodic operation of corresponding frequency and amplitude, an operation result is fed back to the server, and the precision and the accuracy of the sensor to be calibrated are judged according to the consistency and deviation conditions of an operation track. The device can effectively calibrate the running accuracy of the clearance sensor, can calibrate a plurality of sensors at the same time, and is also suitable for calibrating stress change sensors.
Description
Technical Field
The invention relates to the field of intelligent monitoring of wind generating sets, in particular to a gap sensor precision calibration device for a wind generating set and a calibration method thereof.
Background
As an important development direction of new energy, a wind power generation technology is taken, and based on wind resource factor consideration and a unit cost analysis conclusion, a wind power generation unit is continuously developed towards large-scale, large-capacity and offshore, but higher requirements are also put forward on the reliability and safety of the unit. Especially for offshore units, the reliability requirements are higher, and thus the demand of the units on intelligent and sensing technologies is increasing. The bolt monitoring in the wind generating set is directly related to the accuracy of the logic control of the set and the timeliness of the action of a safety chain, and has great influence on the safe operation, high reliability, intellectualization and generating capacity of the set, so that higher requirements are provided for the intellectualization, the reliability and the accuracy of the bolt monitoring. The clearance sensor is used as the most advanced bolt safety monitoring technology at present, grasps the essence of bolt looseness and fracture, simplifies system configuration while realizing intelligent monitoring, realizes modularization and integrated layout, and realizes monitoring and reverse calculation in the aspects of impeller rotating speed, load reverse thrust, bolt looseness and the like through a plurality of dimensions, thereby realizing the function of monitoring a plurality of parameters of key components of a unit under the conditions of simple, integrated and low-cost configuration. Therefore, the accuracy and the effectiveness of the monitoring parameters of the gap sensor are ensured to be directly related to the early warning timeliness of the unit and the rationality of the main control strategy.
In order to ensure the accuracy and effectiveness of the clearance sensor monitoring parameters, the precision of the clearance sensor which is just delivered from the factory needs to be calibrated, so that the device and the method for calibrating the precision of the clearance sensor are provided, the running precision of the clearance sensor is effectively calibrated, the requirement of delivery test of the sensor is met, and the device and the method are popular among technicians in the field.
Disclosure of Invention
The precision calibration device and the calibration method for the clearance sensor can effectively calibrate the running precision of the clearance sensor, can calibrate a plurality of sensors at the same time, and are also suitable for calibrating stress change sensors.
The technical scheme adopted for realizing the above purpose of the invention is as follows:
a precision calibration device for a gap sensor comprises a fixed base plate, a display, a server and a calibration instrument, wherein the display, the server and the calibration instrument are positioned on the fixed base plate, the display and the calibration instrument are connected with the server through data lines, the fixed base plate is also provided with a servo motor, a sliding table assembly and a support, the servo motor, the sliding table assembly and the support are positioned on a straight line, the calibration instrument is positioned inside the support, the servo motor is connected with the server through a power line and a signal line, the sliding table assembly comprises a reciprocating sliding table, a sliding plate and a push plate, the reciprocating sliding table is connected with the servo motor and is driven by the servo motor, the sliding plate is arranged above the reciprocating sliding table and slides in a reciprocating manner, and the push plate is vertically fixed on one side of the sliding plate and is driven by the sliding plate to translate in a reciprocating manner; the push plate and the support are arranged adjacently, a gap is arranged between the push plate and the support, the height of the push plate is higher than that of the support, and the moving end of the calibration instrument is fixedly connected with the lower part of the push plate and driven by the push plate to move synchronously; the top of support is provided with locating component, locating component includes clamping part, transverse location cylinder and is used for placing the location platform of waiting to mark the sensor, and the transverse location cylinder is fixed in the top of support, and the location platform is installed on the transverse location cylinder and can lateral shifting, and clamping part installs on the location platform, and clamping part will wait to mark the stiff end and the location platform fixed connection of sensor, and the top of push pedal is held with the removal of waiting to mark the sensor and is connected and drive its synchronous motion, waits to mark the sensor and passes through the cable and be connected with the server.
The support is provided with more than one positioning assembly in parallel, each positioning assembly corresponds to one sensor to be calibrated, and the top of the push plate is connected with the moving end of more than one sensor to be calibrated simultaneously, so that the more than one sensor to be calibrated can be calibrated simultaneously.
The side face of the support is provided with a metal plate, and the metal plate seals and protects a calibration instrument positioned in the support.
The metal plate on the front side surface of the bracket is connected through a screw, so that the calibration instrument can be conveniently placed and replaced.
The clamping components are two clamping type longitudinal positioning cylinders which are respectively connected to two sides of the positioning table, and the longitudinal positioning cylinders lift up and down so as to fix the sensor to be calibrated on the positioning table.
The fixed bottom plate is also provided with an air pump which is positioned behind the support, and the transverse positioning air cylinder and the longitudinal positioning air cylinder are connected with the air pump through air cylinder pipelines.
The precision of the calibration instrument is in a nanometer level.
The stroke of the reciprocating sliding table is-2.5 mm, and the stroke of the push plate is-5 mm, so that damage to the calibration instrument caused by too large stroke of the reciprocating sliding table is avoided.
The invention also provides a precision calibration method for the gap sensor, which comprises the following steps: (1) The fixed end of the sensor to be calibrated is placed on the positioning table, the clamping component fixedly connects the fixed end of the sensor to be calibrated with the positioning table, a cylinder pipeline of the transverse positioning cylinder is opened, the positioning table transversely moves and is connected to the top of the push plate in an adsorption manner, and the fixing and the positioning of the sensor to be calibrated are achieved;
(2) Inputting frequency and reciprocating amplitude parameters in a display, inputting the input parameters by a server through a signal line and controlling a servo motor to operate, outputting parameter values by the servo motor and driving a reciprocating sliding table, driving a push plate to move in a reciprocating manner under the driving of a reciprocating platform and a sliding plate so as to drive a calibration instrument and a sensor to be calibrated to synchronously perform periodic operation of corresponding frequency and amplitude, feeding back operation results of the calibration instrument and the sensor to be calibrated to the server through a data line and a cable, and displaying a test curve and a statistical result on the display in real time;
(3) The server performs kneading and comparison on the operation track of the servo motor, the operation track of the calibrator and the operation track of the sensor to be calibrated, and judges the precision and accuracy of the sensor to be calibrated according to the consistency and deviation of the operation tracks;
(4) And analyzing the factors causing the deviation by the server, generating an analysis report of the sensor to be calibrated, storing the data in real time, supporting the lookup and rechecking of historical data, regularly generating a product quality analysis statistical report within a periodic range, realizing the continuous optimization and upgrade of the product of the whole product line, and ensuring the production quality of the sensor to be calibrated.
The sensor to be calibrated is provided with a mark code, and after the mark code is scanned by the server, the information of the model, the production batch, the manufacturer and the assembly personnel of the sensor to be calibrated can be displayed on a display screen, so that the data of the sensor to be calibrated can be conveniently filed and managed.
Compared with the prior art, the precision calibration device and the calibration method for the gap sensor provided by the invention have the following advantages: 1. the precision calibration device and the calibration method for the gap sensor can effectively calibrate the precision of the gap sensor, thereby ensuring the industrialized application of the advanced sensing technology on a unit and realizing the sensitivity and the accuracy of monitoring data. 2. The precision calibration device and the calibration method for the gap sensor provided by the invention can also be used for calibrating stress change sensors, namely calibrating all sensors for monitoring the strain or deformation state. 3. The positioning assembly is provided with more than one positioning assembly, and can calibrate a plurality of sensors at the same time. 4. The invention can adjust the calibration parameters of the sensor to be consistent with the actual application parameters by changing the input frequency and the reciprocating amplitude parameters, thereby ensuring the reliability and the effectiveness of the calibration precision of the sensor. 5. In the invention, the sensor to be calibrated is calibrated in a mode of being consistent with the actual working condition arrangement in the calibration process, thereby ensuring the consistency of the measurement method and the actual application.
Drawings
FIG. 1 is a schematic diagram of a right side axial structure of a precision calibration device for a gap sensor provided by the invention;
FIG. 2 is a schematic view of a left-side axial structure of the precision calibration device for a gap sensor provided in the present invention;
FIG. 3 is a schematic top view of the precision calibration apparatus for a gap sensor according to the present invention;
FIG. 4 is a schematic diagram of a sensor to be calibrated;
FIG. 5 is a schematic view of a gap sensor arrangement for practical use;
FIG. 6 is a schematic block diagram of a structure of a precision calibration apparatus for a gap sensor according to the present invention;
FIG. 7 is a schematic diagram of a motion track of the precision calibration device for a gap sensor provided by the invention;
in the figure: 1-a fixed bottom plate, 2-a servo motor and 3-a reciprocating sliding table; 4-a sliding plate, 5-a push plate, 6-a calibration instrument, 7-a transverse positioning cylinder, 8-a cylinder pipeline, 9-an air pump, 10-a longitudinal positioning cylinder, 11-a sensor to be calibrated, 111-a fixed end, 112-a movable end, 113-a cable interface, 12-a positioning table, 13-a display, 14-a server, 15-a power line, 16-a signal line, 17-a bracket, 18-a cable, 19-a monitoring object relative fixing surface A and 20-a monitoring object relative displacement surface B.
Detailed Description
The invention is further described below with reference to the figures and examples.
The precision calibration device for the gap sensor provided in the embodiment has a structure shown in fig. 1 to 3, and comprises a fixed base plate 1, a display 13, a server 14 and a calibration instrument 6, wherein the display 13, the server 14 and the calibration instrument are located on the fixed base plate, the display and the calibration instrument are both connected with the server through data lines and are used for communication and data transmission with the server, the precision of the calibration instrument is in a nanometer level, the calibrated gap sensor can be ensured to meet application requirements, the fixed base plate has a damping function, the stability and accuracy of data in the whole test process are ensured, the server has functions of acquisition, analysis, control and feedback, and can calculate a curve comparison result, display a calibration result, and produce and store a data file. Still be provided with servo motor 2, slip table subassembly and the support 17 that is located a straight line on the PMKD, wherein the calibration instrument is located the inside of support, and the support side is provided with the metal sheet, the metal sheet seals the protection to the calibration instrument that is located the support inside, can avoid the calibration instrument to receive any external force damage, ensures the accuracy of demarcation orbit, and the metal sheet of support leading flank passes through bolted connection, the placing and the change of the calibration instrument of being convenient for. The servo motor is connected with the server through a power line 15 and a signal line 16, the sliding table assembly comprises a reciprocating sliding table 3, a sliding plate 4 and a push plate 5, the reciprocating sliding table is connected with the servo motor and driven by the servo motor, the sliding plate is arranged above the reciprocating sliding table and slides in a reciprocating manner, and the push plate is vertically fixed on one side of the sliding plate and is driven by the sliding plate to translate in a reciprocating manner; the stroke of the reciprocating sliding table is-2.5 mm, the stroke is limited in the stroke range of the sensor, so that the adjustment of the sensors with different precisions can be expanded, the stroke of the push plate is-5 mm, and the damage of a calibration instrument caused by the overlarge stroke of the reciprocating sliding table due to accidents is avoided. The push plate and the support are arranged adjacently, a gap is arranged between the push plate and the support, the height of the push plate is higher than that of the support, and the moving end of the calibration instrument is fixedly connected with the lower part of the push plate and driven by the push plate to move synchronously; the top of the bracket is provided with a positioning assembly, the positioning assembly comprises a clamping part, a transverse positioning cylinder 7 and a positioning table 12 for placing a sensor 11 to be calibrated, the sensor to be calibrated is provided with a fixed end 111, a movable end 112 and a cable interface 113, the structure of the positioning assembly is shown in fig. 4, in the actual application process of the gap sensor, the gap sensor spans a relative fixed surface A19 of a monitored object and a relative displacement surface B20 of the monitored object, the monitoring arrangement schematic diagram of the gap sensor is shown in fig. 5, and in the actual calibration process, the positioning assembly is carried out in a mode consistent with the actual working condition arrangement, so that the consistency of the measuring method and the actual application is ensured. The transverse positioning cylinder is fixed at the top of the support, the positioning table is installed on the transverse positioning cylinder and can move transversely, the clamping components in the embodiment are two clamping type longitudinal positioning cylinders 10, the two longitudinal positioning cylinders are connected to two sides of the positioning table respectively, and the longitudinal positioning cylinders lift up and down to fix the sensor to be calibrated on the positioning table. The fixing bottom plate is further provided with an air pump 9, the air pump is located behind the support, the transverse positioning air cylinder and the longitudinal positioning air cylinder are connected with the air pump through an air cylinder pipeline 8, the air pump is opened and closed according to the air tank pressure to reach pre-charging pressure, an air cylinder pipeline of the longitudinal positioning air cylinder is opened to achieve longitudinal positioning of the sensor to be calibrated, then the air cylinder pipeline of the transverse positioning air cylinder is opened, the positioning table moves transversely to move and adsorb the sensor to be calibrated to be connected to the top of the push plate, the sensor to be calibrated is connected with the server through a cable 18 and used for communication and data transmission of the calibration sensor and the server, in the embodiment, the support is provided with a positioning assembly, the support can be further provided with more than one positioning assembly in parallel, at the moment, more than one top connected with the moving end of the sensor to be calibrated is correspondingly arranged above the push plate, and calibration of a plurality of sensors to be calibrated can be achieved simultaneously.
The structural schematic block diagram of the precision calibration device for the gap sensor provided by the invention is shown in fig. 6, and the calibration method comprises the following steps: (1) The fixed end of the sensor to be calibrated is placed on the positioning table, the fixed end of the sensor to be calibrated is fixedly connected with the positioning table through the clamping component, the cylinder pipeline of the transverse positioning cylinder is opened, the sensor to be calibrated is transversely moved and is connected to the top of the push plate in an adsorption mode through the positioning table, and the sensor to be calibrated is fixed and positioned;
(2) Inputting frequency and reciprocating amplitude parameters in a display, inputting the input parameters by a server through a signal line and controlling a servo motor to operate, outputting parameter values by the servo motor and driving a reciprocating sliding table, driving a push plate to move in a reciprocating manner under the driving of a reciprocating platform and a sliding plate so as to drive a calibration instrument and a sensor to be calibrated to synchronously perform periodic operation of corresponding frequency and amplitude, feeding back operation results of the calibration instrument and the sensor to be calibrated to the server through a data line and a cable, and displaying a test curve and a statistical result on the display in real time; the input frequency and the reciprocating amplitude parameter can be changed according to the actual application occasion of the sensor, so that the parameters are consistent with the actual application parameters, and the reliability and the effectiveness of the calibration precision of the sensor are ensured;
(3) The server performs kneading and comparison on the operation track of the servo motor, the operation track of the calibrator and the operation track of the sensor to be calibrated, and judges the precision and accuracy of the sensor to be calibrated according to the consistency and deviation of the operation tracks, wherein schematic diagrams of the operation tracks of the servo motor, the calibrator and the sensor to be calibrated are shown in FIG. 7;
(4) The sensor to be calibrated is provided with a mark code, the mark code can display the model, production batch, manufacturer and assembly personnel information of the sensor to be calibrated on a display screen after being scanned by a server, the server scans the mark code and analyzes the factors causing the deviation to generate an analysis report of the sensor to be calibrated, the data is stored in real time, the reference and rechecking of historical data are supported, a product quality analysis statistical report in a periodic range is generated periodically, the continuous optimization and upgrading of the whole product line product are realized, and the production quality of the sensor to be calibrated is ensured.
The calibration method realizes measurement and evaluation of the correlation of the displacement curve between the sensor to be calibrated and the high-precision calibrator by a method of measuring the same displacement variable quantity by the high-precision calibrator and the sensor to be calibrated and comparing two groups of test data results, thereby finally realizing the aims of measuring the precision of the sensor to be calibrated and controlling the product delivery quality, and being suitable for the calibration of any sensor for monitoring deformation or strain.
Claims (8)
1. The utility model provides a precision calibration device for clearance sensor, includes PMKD and is located display, server and the calibrator on the PMKD, and the display all is connected its characterized in that through data line and server with the calibrator: the fixing bottom plate is also provided with a servo motor, a sliding table assembly and a support which are positioned on a straight line, wherein the calibration instrument is positioned inside the support, the servo motor is connected with a server through a power line and a signal line, the sliding table assembly comprises a reciprocating sliding table, a sliding plate and a push plate, the reciprocating sliding table is connected with the servo motor and driven by the servo motor, the sliding plate is arranged above the reciprocating sliding table and slides in a reciprocating manner, and the push plate is vertically fixed on one side of the sliding plate and is driven by the sliding plate to translate in a reciprocating manner; the push plate and the bracket are arranged adjacently, a gap is arranged between the push plate and the bracket, the height of the push plate is higher than that of the bracket, and the moving end of the calibrator is fixedly connected with the lower part of the push plate and driven by the push plate to move synchronously; the top of the support is provided with a positioning assembly, the positioning assembly comprises a clamping part, a transverse positioning cylinder and a positioning table for placing a sensor to be calibrated, the transverse positioning cylinder is fixed at the top of the support, the positioning table is installed on the transverse positioning cylinder and can transversely move, the clamping part is installed on the positioning table, the clamping part fixedly connects the fixed end of the sensor to be calibrated with the positioning table, the top of the push plate is in adsorption connection with the moving end of the sensor to be calibrated and drives the moving end of the sensor to be calibrated to synchronously move, and the sensor to be calibrated is connected with a server through a cable; the precision of the calibration instrument is in a nanometer level; more than one positioning component is arranged on the bracket in parallel, each positioning component corresponds to one sensor to be calibrated, and the top of the push plate is simultaneously connected with the moving end of more than one sensor to be calibrated, so that the sensors to be calibrated are calibrated simultaneously; and changing the input frequency and reciprocating amplitude parameters of the servo motor according to the actual application occasion of the sensor to be calibrated, so that the calibration parameters of the sensor to be calibrated are consistent with the actual application parameters.
2. The accuracy calibration device for the gap sensor according to claim 1, wherein: the side face of the support is provided with a metal plate, and the metal plate seals and protects a calibration instrument positioned in the support.
3. The accuracy calibration device for the gap sensor according to claim 2, characterized in that: the metal plate on the front side surface of the bracket is connected through a screw, so that the calibration instrument can be conveniently placed and replaced.
4. The accuracy calibration device for the gap sensor according to claim 1, characterized in that: the clamping component is two clamping type longitudinal positioning cylinders which are respectively connected to two sides of the positioning table, and the longitudinal positioning cylinders are lifted up and down so as to fix the sensor to be calibrated on the positioning table.
5. The accuracy calibration device for the gap sensor according to claim 1, characterized in that: the fixed bottom plate is also provided with an air pump, the air pump is positioned behind the bracket, and the transverse positioning air cylinder and the longitudinal positioning air cylinder are connected with the air pump through air cylinder pipelines.
6. The accuracy calibration device for the gap sensor according to claim 1, characterized in that: the stroke of the reciprocating sliding table is-2.5 mm, and the stroke of the push plate is-5 mm, so that damage to the calibration instrument caused by too large stroke of the reciprocating sliding table is avoided.
7. A calibration method based on the precision calibration device for a gap sensor of claim 1, characterized in that: the method comprises the following steps: (1) The fixed end of the sensor to be calibrated is placed on the positioning table, the clamping component fixedly connects the fixed end of the sensor to be calibrated with the positioning table, a cylinder pipeline of the transverse positioning cylinder is opened, the positioning table transversely moves and is connected to the top of the push plate in an adsorption manner, and the fixing and the positioning of the sensor to be calibrated are achieved;
(2) Inputting frequency and reciprocating amplitude parameters in a display, inputting the input parameters by a server through a signal line and controlling a servo motor to operate, outputting parameter values by the servo motor and driving a reciprocating sliding table, driving a push plate to move in a reciprocating manner under the driving of a reciprocating platform and a sliding plate so as to drive a calibration instrument and a sensor to be calibrated to synchronously perform periodic operation of corresponding frequency and amplitude, feeding back operation results of the calibration instrument and the sensor to be calibrated to the server through a data line and a cable, and displaying a test curve and a statistical result on the display in real time;
(3) The server performs kneading and comparison on the operation track of the servo motor, the operation track of the calibrator and the operation track of the sensor to be calibrated, and judges the precision and accuracy of the sensor to be calibrated according to the consistency and deviation of the operation tracks;
(4) And analyzing the factors causing the deviation by the server, generating an analysis report of the sensor to be calibrated, storing the data in real time, supporting the lookup and rechecking of historical data, regularly generating a product quality analysis statistical report within a periodic range, realizing the continuous optimization and upgrade of the product of the whole product line, and ensuring the production quality of the sensor to be calibrated.
8. The calibration method according to claim 7, wherein: the sensor to be calibrated is provided with a mark code, and after the mark code is scanned by the server, the information of the model, the production batch, the manufacturer and the assembly personnel of the sensor to be calibrated can be displayed on a display screen, so that the data of the sensor to be calibrated can be conveniently filed and managed.
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| WO2020014852A1 (en) * | 2018-07-17 | 2020-01-23 | 大连理工大学 | Closed-loop control method for transverse load amplitude of multi-bolt loosening tester |
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| CN103162661A (en) * | 2013-03-08 | 2013-06-19 | 九江精达检测技术有限公司 | Device and method for calibrating convergence meter |
| CN203824546U (en) * | 2014-04-23 | 2014-09-10 | 中国航空动力机械研究所 | Device for calibrating blade tip gap sensor |
| CN108801205A (en) * | 2017-05-04 | 2018-11-13 | 厦门超易捷信息科技有限公司 | A kind of sensitivity calibration device and scaling method of strain transducer |
| CN107894221A (en) * | 2017-11-09 | 2018-04-10 | 中国航发湖南动力机械研究所 | Gap sensor dynamic testboard and static test equipment |
| CN107883910A (en) * | 2017-11-09 | 2018-04-06 | 中国航发湖南动力机械研究所 | Portable gap sensor checkout and diagnosis instrument |
| CN111318979A (en) * | 2018-12-16 | 2020-06-23 | 宁波欣洋检测科技有限公司 | Size detection table with good positioning effect |
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| CN111879350A (en) * | 2020-08-31 | 2020-11-03 | 中国地震局工程力学研究所 | Test performance calibration device for hybrid acceleration sensor and displacement sensor |
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| WO2020014852A1 (en) * | 2018-07-17 | 2020-01-23 | 大连理工大学 | Closed-loop control method for transverse load amplitude of multi-bolt loosening tester |
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| 疲劳传感器标定装置的研制;李训涛等;《实验技术与管理》;20080820(第08期);第69-73页 * |
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