CN111089987A - Portable field multi-frequency vibration acceleration correction system and method - Google Patents
Portable field multi-frequency vibration acceleration correction system and method Download PDFInfo
- Publication number
- CN111089987A CN111089987A CN201911369798.6A CN201911369798A CN111089987A CN 111089987 A CN111089987 A CN 111089987A CN 201911369798 A CN201911369798 A CN 201911369798A CN 111089987 A CN111089987 A CN 111089987A
- Authority
- CN
- China
- Prior art keywords
- vibration acceleration
- frequency
- portable
- acceleration sensor
- correction system
- 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.)
- Pending
Links
- 230000001133 acceleration Effects 0.000 title claims abstract description 101
- 238000012937 correction Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 39
- 230000005284 excitation Effects 0.000 claims abstract description 34
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims description 3
- 230000005672 electromagnetic field Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses a portable field multi-frequency vibration acceleration correction system and a method, wherein the system comprises a portable multi-frequency standard vibration source, an acquisition card industrial control box and a computer, and the portable multi-frequency standard vibration source comprises a cylindrical shell, a battery, a modulation circuit, an excitation coil, a central magnetic pole, a porcelain cylinder, a moving coil platform, a guide wheel and a cover cap. The method is used for the portable field multi-frequency vibration acceleration correction system, the standard vibration source side is portable and carried to the field to carry out the vibration test of the converter transformer, the correction system is simple in composition, can be quickly installed for testing, and is simple in operation steps.
Description
Technical Field
The invention relates to the technical field of converter transformer vibration testing equipment, in particular to a portable field multi-frequency vibration acceleration correction system and method.
Background
The converter transformer vibration test is a converter transformer state monitoring method based on vibration signal analysis, a new technical means for detecting the states of a converter transformer winding and an iron core can evaluate the working states of the iron core and the winding, predict the faults of winding deformation, iron core winding and other structural members loosening and the like caused by short circuit which may occur, and make a corresponding converter transformer state maintenance strategy.
The converter transformer vibration testing device is a converter transformer vibration acceleration testing system based on an acceleration sensor, and whether the acceleration sensor, an acquisition card and a data analysis system work normally has great influence on the result of the converter transformer vibration testing. The portable multi-frequency standard vibration source is used as a standard multi-frequency vibration source and is provided for the converter transformer vibration testing device, and the acceleration sensor and the device can be corrected according to detection signals of the vibration source and the converter transformer vibration testing device before vibration testing is carried out on a converter station site; meanwhile, the device can be subjected to balanced zero clearing operation of the vibration signal according to the vibration source signal, zero drift of the acceleration sensor and the converter transformer vibration device is eliminated, and the converter transformer vibration detection precision of the device is ensured. However, the existing equipment applied to the vibration detection of the converter transformer is complex and large in size, is not easy to install and test quickly, and is complex in method.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a portable field multi-frequency vibration acceleration correction system and a method.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a portable on-site multi-frequency vibration acceleration correction system comprises a portable multi-frequency standard vibration source, an acquisition card industrial control box and a computer, wherein the portable multi-frequency standard vibration source comprises a shell, a central magnetic pole, an excitation coil, a modulation circuit and a direct current power supply are arranged in the shell, the modulation circuit converts direct current input current of the direct current power supply into alternating current input current and acts on the excitation coil, at least two excitation coils are coaxially arranged and form an axial center hole, the central magnetic pole is arranged in the axial center hole of the excitation coil and is acted by alternating electromagnetic field of the excitation coil to reciprocate along the axial center hole, a moving coil platform is arranged at one end, facing outwards, of the central magnetic pole, a first screw rod and a second screw rod are arranged on the moving coil platform, the first screw rod is connected with the acquisition card industrial control box through a piezoelectric vibration acceleration sensor for testing, the second screw is connected with the acquisition card industrial control box through a standard vibration acceleration sensor, and the acquisition card industrial control box is connected with the computer control signal.
The portable field multi-frequency vibration acceleration correction system is characterized in that the excitation coil is fixed in the shell through a porcelain cylinder.
The portable field multi-frequency vibration acceleration correction system is characterized in that a guide part for guiding the reciprocating motion of the central magnetic pole is arranged in the shell.
The portable field multi-frequency vibration acceleration correction system is characterized in that a cover is arranged in the shell and used for covering the excitation coil.
The portable field multi-frequency vibration acceleration correction system is characterized in that the housing is a cylinder, the diameter of the housing is 50mm, and the height of the housing is 120mm
The portable field multi-frequency vibration acceleration correction system is characterized in that the modulation circuit is a voltage type single-phase full-bridge bipolar sine pulse width modulation direct current-alternating current inverter circuit.
A portable field multi-frequency vibration acceleration correction method for a portable field multi-frequency vibration acceleration correction system as described above, comprising the steps of:
step 1: mounting a piezoelectric vibration acceleration sensor for testing on a first screw rod, and mounting a standard vibration acceleration sensor on a second screw rod;
step 2: starting a portable multi-frequency standard vibration source, and selecting the frequency of vibration acceleration;
step 4, connecting a communication interface of the acquisition card industrial control box to a computer through a network cable;
and 7, measuring the vibration acceleration in the operation of the converter transformer through signal analysis software to obtain a vibration acceleration signal in the operation of the converter transformer.
According to the portable field multi-frequency vibration acceleration correction method, the frequency of the vibration acceleration is 100Hz, 200Hz or 300Hz, and the frequency deviation is within 2%.
According to the portable field multi-frequency vibration acceleration correction method, further, the amplitude of the vibration acceleration is 10m/s2, and the amplitude deviation is within 5%.
Compared with the prior art, the invention has the beneficial effects that: the vibration source is in a portable design, all parts are sealed in the cylindrical shell, the size of the cylindrical shell is only 50mm in diameter and 120mm in height, and the vibration source is convenient to use when a converter transformer vibration test is carried out on the site of a converter station; the vibration source is powered by a 24V direct current power supply, an external power supply is not needed, and the converter station is convenient to use on site; by adopting a multi-frequency design, the vibration source can be respectively set to have a plurality of frequencies and the same amplitude, and the plurality of frequencies are the same as the characteristic frequency of the converter transformer, so that the vibration detection precision of the converter transformer of the device can be ensured; the method has simple operation steps.
Drawings
FIG. 1 is a schematic diagram of a portable multi-frequency standard vibration source;
FIG. 2 is a schematic diagram of a portable field multi-frequency vibration acceleration correction system.
Description of reference numerals: 1. a housing; 2. a direct current power supply; 3. a modulation circuit; 401. a first excitation coil; 402. a second excitation coil; 5. a central magnetic pole; 6. a porcelain jar; 601. a porcelain cylinder cover; 7. a moving coil platform; 701. a first screw; 702. a second screw; 8. a guide member; 9. a cover; 10. a portable multi-frequency standard vibration source; 11. testing a piezoelectric vibration acceleration sensor; 12. a standard vibration acceleration sensor; 13. a coaxial cable; 14. collecting a card industrial control box; 15. a network cable; 16. and (4) a computer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
referring to fig. 1 and 2, a portable field multi-frequency vibration acceleration correction system comprises a portable multi-frequency standard vibration source 10, an acquisition card industrial control box 14 and a computer 16, wherein the portable multi-frequency standard vibration source comprises a shell 1, a central magnetic pole 5, an excitation coil, a modulation circuit 3 and a direct current power supply 2 are arranged in the shell 1, the modulation circuit 3 converts direct current input current of the direct current power supply 2 into alternating current input current and acts on the excitation coil, the output voltage of the direct current power supply 2 is 24V, the direct current power supply 2 is connected with the modulation circuit 3 to provide stable 24V direct current voltage, the vibration source adopts the 24V direct current power supply 2 to supply power, an external power supply is not needed, and the field use of a convertor station is facilitated. The first excitation coil 401 and the second excitation coil 402 are coaxially arranged and are formed with axial center holes, the central magnetic pole 5 is arranged in the axial center hole of the excitation coil and reciprocates along the axial direction of the axial center hole under the action of an alternating electromagnetic field of the excitation coil, and one end of the central magnetic pole 5 facing to the outside is provided with a moving coil platform 7. The modulation circuit 3 for realizing the direct-alternating current conversion is the prior art, and can be realized by using a single-phase full-bridge inverter bipolar SPWM modulation circuit 3 or other inverters. The modulation circuit 3 can modulate the 24V direct-current voltage into two paths of single-phase alternating-current voltages with the same amplitude, frequency and phase, the two paths of single-phase alternating-current voltages act on the first excitation coil 401 and the second excitation coil 402, sine wave magnetic fields generated by the first excitation coil 401 and the second excitation coil 402 interact with the central magnetic pole 5 at the same time, and the central magnetic pole 5 is acted by electromagnetic force to generate sine wave acceleration in the vertical direction; the central magnetic pole 5 and the moving coil platform 7 are mutually connected in the vertical direction, the moving coil platform 7 is also subjected to sine wave acceleration in the vertical direction, the acceleration frequency is the same as the frequency of single-phase alternating-current voltage, and the speed and the acceleration of the axial reciprocating motion of the moving coil platform 7 along the axial central hole can be realized by controlling the frequency of the output voltage of the modulation circuit 3. The moving coil platform 7 is provided with a first screw 701 and a second screw 702, the first screw 701 is connected with an industrial control box 14 of the acquisition card through a piezoelectric vibration acceleration sensor 11 for testing, the second screw 702 is connected with the industrial control box 14 of the acquisition card through a standard vibration acceleration sensor 12, and the industrial control box 14 of the acquisition card is connected with a computer 16 through control signals.
Further, the excitation coil is fixed in the housing 1 through a porcelain cylinder 6, specifically, the first excitation coil 401 and the second excitation coil 402 are wound on the porcelain cylinder 6, and the porcelain cylinder 6 provides mechanical support and insulation for the first excitation coil 401 and the second excitation coil 402.
Further, the axial reciprocating motion of the central magnetic pole 5 along the axial central hole is facilitated, and a guide member 8 for guiding the reciprocating motion of the central magnetic pole 5 is arranged in the housing 1.
Further, the shell 1 is cylindrical, the diameter of the size of the shell 1 is 50mm, the height of the shell is 120mm, the vibration source is designed in a portable mode, all parts are sealed inside the cylindrical shell 1, and the vibration testing device is convenient to use when a current converting transformer vibration test is carried out on the site of a current converting station.
Further, a cover 9 for covering the exciting coil is provided in the housing 1, so that the electric parts such as the exciting coil, the guide 8, the central magnetic pole 5, etc. inside are prevented from being interfered by external impurities, dust, etc.
Furthermore, the modulation circuit 3 is a voltage type single-phase full-bridge bipolar sine pulse width modulation direct current-alternating current inverter circuit, the modulation circuit 3 is provided with a switching frequency control circuit, the voltage of the switching frequency control circuit is adjusted according to an external button, the switching frequency is adjusted, and the switching frequency is 15 times of the frequency of the single-phase alternating current voltage output by the modulation circuit 3, so that the frequency of the sine wave current output can be adjusted by adjusting the switching frequency; the sine wave acceleration frequency of the moving coil platform 7 can be selected to be 100Hz, 200Hz and 300Hz according to the switching frequency of the modulation circuit, the frequency deviation is within 2 percent, and the sine wave acceleration amplitude of the moving coil platform 5 is 10m/s2The amplitude deviation is within 5%.
A portable field multi-frequency vibration acceleration correction method is used for the portable field multi-frequency vibration acceleration correction system and comprises the following steps:
step 1: the piezoelectric vibration acceleration sensor 11 for testing is installed on the first screw 701, and the standard vibration acceleration sensor 12 is installed on the second screw 702, specifically, a vibration test of a converter transformer in a certain ± 800kV converter station in guangzhou is taken as an example. Before a converter current vibration test is carried out in a converter station, a piezoelectric vibration acceleration sensor 11 and a standard vibration acceleration sensor 12 for test are installed on a screw rod of a moving coil platform 7 of a portable multi-frequency standard vibration source 10 through threads of the sensors, and meanwhile, the installation positions of the piezoelectric vibration acceleration sensor 11 and the standard vibration acceleration sensor 12 for test are guaranteed to be symmetrical positions of the center of the moving coil platform 7.
Step 2: and starting the portable multi-frequency standard vibration source, and selecting the frequency of the vibration acceleration. The frequency of the vibration acceleration is chosen to be 100 Hz. As shown in fig. 1, a 24V dc power supply 2 is connected to the modulation circuit 3 to provide a stable 24V dc voltage for the modulation circuit 3; the modulation circuit 3 is a voltage type single-phase full-bridge bipolar sine pulse width modulation circuit, can modulate 24V direct current voltage into two single-phase alternating current voltages with the same amplitude, frequency and phase, the modulation circuit 3 is provided with a switching frequency control circuit, the external button selects 100Hz frequency, the voltage of the switching frequency control circuit is 2V, and the corresponding modulation circuitThe switching frequency of (2) is set to 1500Hz, and since the switching frequency is 15 times the frequency of the single-phase alternating-current voltage output by the modulation circuit 3, the frequencies of the single-phase alternating-current voltages are 100Hz respectively; two-phase single-phase alternating-current voltages are input to the first excitation coil 401 and the second excitation coil 402; two first exciting coils 401 and a second exciting coil 402 are wound on a porcelain cylinder 6, and the porcelain cylinder 6 provides mechanical support and insulation for the first exciting coils 401 and the second exciting coils 402; sine wave magnetic fields (frequency is 100Hz) generated by the two first magnet exciting coils 401 and the second magnet exciting coil 402 simultaneously interact with the central magnetic pole 5, and the central magnetic pole 5 is acted by electromagnetic force to generate sine wave acceleration in the vertical direction; the central magnetic pole 5 is connected with the moving coil platform 7 in a rigid way in the vertical direction, the moving coil platform 7 is also subjected to sine wave acceleration in the vertical direction, the acceleration frequency is the same as the frequency of single-phase alternating-current voltage, namely 100Hz, and the amplitude is kept to be 10m/s2。
step 4, connecting a communication interface of the acquisition card industrial control box 14 to a computer 16 through a network cable 15;
and 7, measuring the vibration acceleration in the operation of the converter transformer through signal analysis software to obtain a vibration acceleration signal in the operation of the converter transformer.
Further, the frequency of the vibration acceleration is 100Hz, 200Hz or 300Hz, and the frequency deviation is within 2 percent.
Further, the amplitude of the vibration acceleration is 10m/s2, and the amplitude deviation is within 5%.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (9)
1. The portable on-site multi-frequency vibration acceleration correction system is characterized by comprising a portable multi-frequency standard vibration source, an acquisition card industrial control box and a computer, wherein the portable multi-frequency standard vibration source comprises a shell, a central magnetic pole, an excitation coil, a modulation circuit and a direct current power supply are arranged in the shell, the modulation circuit converts direct current input current of the direct current power supply into alternating current input current and acts on the excitation coil, at least two excitation coils are coaxially arranged and form an axial center hole, the central magnetic pole is arranged in the axial center hole of the excitation coil and is acted by an alternating electromagnetic field of the excitation coil to reciprocate along the axial center hole, a moving coil platform is arranged at one end, facing outwards, of the central magnetic pole, a first screw rod and a second screw rod are arranged on the moving coil platform, the first screw rod is connected with the acquisition card industrial control box through a piezoelectric vibration acceleration sensor for testing, the second screw is connected with the acquisition card industrial control box through a standard vibration acceleration sensor, and the acquisition card industrial control box is connected with the computer control signal.
2. The portable field multi-frequency vibration acceleration correction system of claim 1, characterized in that the excitation coil is fixed in the housing by a porcelain cylinder.
3. The portable field multiple frequency vibration acceleration correction system according to claim 1, characterized in that a guide member is provided in the housing for guiding the reciprocating motion of the center magnetic pole.
4. The portable field multiple frequency vibration acceleration correction system of claim 1, characterized in that a cover is provided inside the housing for covering the excitation coil.
5. The portable field multi-frequency vibration acceleration correction system of claim 1, characterized in that the housing is a cylinder and the diameter of the housing is 50mm and the height is 120 mm.
6. The portable field multi-frequency vibration acceleration correction system of claim 1, wherein the modulation circuit is a voltage-type single-phase full-bridge bipolar sine pulse width modulation dc-ac inverter circuit.
7. A portable field multi-frequency vibration acceleration correction method, for use in the portable field multi-frequency vibration acceleration correction system of any one of claims 1 to 6, comprising the steps of:
step 1: mounting a piezoelectric vibration acceleration sensor for testing on a first screw rod, and mounting a standard vibration acceleration sensor on a second screw rod;
step 2: starting a portable multi-frequency standard vibration source, and selecting the frequency of vibration acceleration;
step 3, connecting the piezoelectric vibration acceleration sensor for testing and the standard vibration acceleration sensor to an industrial control box of the acquisition card through a coaxial cable;
step 4, connecting a communication interface of the acquisition card industrial control box to a computer through a network cable;
step 5, starting the computer, and opening signal analysis software installed in the computer;
step 6, carrying out balancing and zero clearing operation on the acceleration vibration signals of the piezoelectric vibration acceleration sensor for testing and the acquisition card industrial control box through signal analysis software, eliminating zero drift of the piezoelectric vibration acceleration sensor for testing and the acquisition card industrial control box, further operating the signal analysis software to obtain the output frequency and the amplitude of the piezoelectric vibration acceleration sensor for testing, comparing the output frequency and the amplitude of the piezoelectric vibration acceleration sensor for testing with the output frequency and the amplitude of the standard vibration acceleration sensor, and finishing correction operation;
and 7, measuring the vibration acceleration in the operation of the converter transformer through signal analysis software to obtain a vibration acceleration signal in the operation of the converter transformer.
8. The portable multi-frequency vibration acceleration correction method for on-site use according to claim 7, wherein the frequency of the vibration acceleration is 100Hz, 200Hz or 300Hz, and the frequency deviation is within 2%.
9. The portable field multi-frequency vibration acceleration correction method of claim 7, wherein the amplitude of the vibration acceleration is 10m/s2The amplitude deviation is within 5%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911369798.6A CN111089987A (en) | 2019-12-26 | 2019-12-26 | Portable field multi-frequency vibration acceleration correction system and method |
| PCT/CN2020/115565 WO2021128971A1 (en) | 2019-12-26 | 2020-09-16 | Portable field multi-frequency vibration acceleration correction system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911369798.6A CN111089987A (en) | 2019-12-26 | 2019-12-26 | Portable field multi-frequency vibration acceleration correction system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111089987A true CN111089987A (en) | 2020-05-01 |
Family
ID=70397203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911369798.6A Pending CN111089987A (en) | 2019-12-26 | 2019-12-26 | Portable field multi-frequency vibration acceleration correction system and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111089987A (en) |
| WO (1) | WO2021128971A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021128971A1 (en) * | 2019-12-26 | 2021-07-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Portable field multi-frequency vibration acceleration correction system and method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1955644A (en) * | 2006-07-07 | 2007-05-02 | 中国航空工业第一集团公司北京长城计量测试技术研究所 | Low-frequency angular vibration table |
| CN202372252U (en) * | 2011-12-30 | 2012-08-08 | 东北石油大学 | Accelerometer checking system-based dynamic checking device of eddy current sensor |
| CN103513060A (en) * | 2012-06-28 | 2014-01-15 | 洛阳市重冶矿山机械有限公司 | Method for converting PR9270 type vibration exciter into piezoelectric accelerometer calibrator |
| CN104459205A (en) * | 2014-12-08 | 2015-03-25 | 福建宁德核电有限公司 | Calibrating method and system of acceleration sensor |
| CN106124803A (en) * | 2016-06-13 | 2016-11-16 | 中国地质大学（武汉） | A kind of calibration system of optical fiber acceleration transducer |
| CN106404160A (en) * | 2016-06-30 | 2017-02-15 | 国网重庆市电力公司电力科学研究院 | Power transmission line monitoring device metering system and method in field environment |
| CN106597023A (en) * | 2016-12-30 | 2017-04-26 | 浙江大学 | Electromagnetic driving type micro-acceleration vibration apparatus |
| CN107421729A (en) * | 2017-08-11 | 2017-12-01 | 南京理工大学 | A kind of MR elastomer vibration isolator dynamic performance testing system |
| CN207248916U (en) * | 2017-09-04 | 2018-04-17 | 广西电网有限责任公司电力科学研究院 | A kind of acceleration transducer calibrating installation |
| CN109579973A (en) * | 2018-11-22 | 2019-04-05 | 国网天津市电力公司电力科学研究院 | A kind of vibrating speed sensors sensitivity coefficient method of calibration |
| CN109579976A (en) * | 2018-11-22 | 2019-04-05 | 国网天津市电力公司电力科学研究院 | A kind of piezoelectric acceleration transducer sensitivity coefficient method of calibration |
| CN209342325U (en) * | 2018-11-09 | 2019-09-03 | 西人马（厦门）科技有限公司 | A kind of shake table |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394145C (en) * | 2006-07-19 | 2008-06-11 | 中国航空工业第一集团公司北京长城计量测试技术研究所 | Electric angular vibration table |
| JP5603162B2 (en) * | 2009-07-27 | 2014-10-08 | 三興コントロール株式会社 | Vibration generator |
| CN105149199B (en) * | 2015-07-14 | 2018-05-15 | 北京卫星环境工程研究所 | The electromagnetic vibration generator system used under spacecraft dynamics apocarpy |
| CN106597024B (en) * | 2016-12-30 | 2020-01-21 | 浙江大学 | Micro-acceleration vibration device |
| CN209069550U (en) * | 2018-11-09 | 2019-07-05 | 苏州东菱振动试验仪器有限公司 | A kind of shake table |
| CN109470888B (en) * | 2018-12-05 | 2020-10-27 | 西北工业大学 | Calibration system and calibration method of high-g-value accelerometer based on deep learning |
| CN111089987A (en) * | 2019-12-26 | 2020-05-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Portable field multi-frequency vibration acceleration correction system and method |
| CN211457013U (en) * | 2019-12-26 | 2020-09-08 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Portable multi-frequency standard vibration source |
-
2019
- 2019-12-26 CN CN201911369798.6A patent/CN111089987A/en active Pending
-
2020
- 2020-09-16 WO PCT/CN2020/115565 patent/WO2021128971A1/en active Application Filing
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1955644A (en) * | 2006-07-07 | 2007-05-02 | 中国航空工业第一集团公司北京长城计量测试技术研究所 | Low-frequency angular vibration table |
| CN202372252U (en) * | 2011-12-30 | 2012-08-08 | 东北石油大学 | Accelerometer checking system-based dynamic checking device of eddy current sensor |
| CN103513060A (en) * | 2012-06-28 | 2014-01-15 | 洛阳市重冶矿山机械有限公司 | Method for converting PR9270 type vibration exciter into piezoelectric accelerometer calibrator |
| CN104459205A (en) * | 2014-12-08 | 2015-03-25 | 福建宁德核电有限公司 | Calibrating method and system of acceleration sensor |
| CN106124803A (en) * | 2016-06-13 | 2016-11-16 | 中国地质大学（武汉） | A kind of calibration system of optical fiber acceleration transducer |
| CN106404160A (en) * | 2016-06-30 | 2017-02-15 | 国网重庆市电力公司电力科学研究院 | Power transmission line monitoring device metering system and method in field environment |
| CN106597023A (en) * | 2016-12-30 | 2017-04-26 | 浙江大学 | Electromagnetic driving type micro-acceleration vibration apparatus |
| CN107421729A (en) * | 2017-08-11 | 2017-12-01 | 南京理工大学 | A kind of MR elastomer vibration isolator dynamic performance testing system |
| CN207248916U (en) * | 2017-09-04 | 2018-04-17 | 广西电网有限责任公司电力科学研究院 | A kind of acceleration transducer calibrating installation |
| CN209342325U (en) * | 2018-11-09 | 2019-09-03 | 西人马（厦门）科技有限公司 | A kind of shake table |
| CN109579973A (en) * | 2018-11-22 | 2019-04-05 | 国网天津市电力公司电力科学研究院 | A kind of vibrating speed sensors sensitivity coefficient method of calibration |
| CN109579976A (en) * | 2018-11-22 | 2019-04-05 | 国网天津市电力公司电力科学研究院 | A kind of piezoelectric acceleration transducer sensitivity coefficient method of calibration |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021128971A1 (en) * | 2019-12-26 | 2021-07-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Portable field multi-frequency vibration acceleration correction system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021128971A1 (en) | 2021-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2982565C (en) | Enhanced optical condition monitoring system for power transformer and method for operating power transformer | |
| US7888915B2 (en) | System for detecting generator winding faults | |
| CN101119090A (en) | High voltage synchronous machine whole digitization vector control device | |
| CA2905668C (en) | Method and system for determining core losses in a permanent magnet synchronous motor | |
| CN105226610A (en) | A kind of Transformer Close magnetizing inrush current arrester | |
| CN111089987A (en) | Portable field multi-frequency vibration acceleration correction system and method | |
| CN103248058B (en) | A kind of Magnetically-controlreactor reactor control system | |
| CN211457013U (en) | Portable multi-frequency standard vibration source | |
| CN110488800A (en) | A kind of electric machine controller test macro and method | |
| CN102156268A (en) | Device for measuring rotating magnetization characteristic of magnetic material | |
| CN102841314A (en) | Temperature rise test method and system for electrically excited synchronous motors | |
| CN101789747B (en) | Control method for speed measurement of asynchronous motor and device therefor | |
| CN201266232Y (en) | AC test device for on-load tap-changer operating characteristic of transformer | |
| CN205176206U (en) | Frequency conversion series resonance ac voltage withstand test test device | |
| CN103338025A (en) | A power frequency induction adjustable resonance apparatus and a frequency modulation method thereof for determining a power frequency in-series resonant condition | |
| CN102946087A (en) | Low voltage frequency converter provided with overvoltage protection function and overvoltage protection method of low voltage frequency converter | |
| CN209177895U (en) | Tower crane lifting safety guard | |
| CN201797317U (en) | Power grid harmonic suppression device | |
| CN201813146U (en) | Shaft current relay protection device of hydro-generator | |
| KR101539405B1 (en) | Industrial vibration display device having self-generation function | |
| CN201398173Y (en) | Speed measurement control device for asynchronous motor | |
| CN215116587U (en) | Measuring device | |
| CN207424204U (en) | A kind of threephase asynchronous machine testing results device | |
| CN213337842U (en) | Transformer electrical fault early warning system | |
| RU128407U1 (en) | AUTONOMOUS UNIVERSAL MEASURING MODULE IN THE ELECTRIC TRANSMISSION NETWORK |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200501 |
|
| RJ01 | Rejection of invention patent application after publication |