CN108974398B - Multi-angle atomic oxygen test online monitoring device and monitoring method - Google Patents
Multi-angle atomic oxygen test online monitoring device and monitoring method Download PDFInfo
- Publication number
- CN108974398B CN108974398B CN201811087657.0A CN201811087657A CN108974398B CN 108974398 B CN108974398 B CN 108974398B CN 201811087657 A CN201811087657 A CN 201811087657A CN 108974398 B CN108974398 B CN 108974398B
- Authority
- CN
- China
- Prior art keywords
- test
- atomic oxygen
- test sample
- thickness
- angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a multi-angle atomic oxygen test on-line monitoring device and a monitoring method, wherein the device comprises: testing the cabin; an atomic oxygen generator and control system, comprising: an atomic oxygen generator and an atomic oxygen generator control system; a frequency testing system, comprising: a frequency detection system and a frequency receiving system; a mechanical control and piezoelectric system, comprising: the device comprises a displacement control mechanism, a thickness monitoring platform, a test sample, a temperature control platform and vibration feedback control; a vacuum system; a support platform, and a thickness monitoring system. The multi-angle atomic oxygen test online monitoring device and the monitoring method can effectively solve the problem of the relation between the test sample degradation condition and the atomic oxygen accumulated flux in the ground atomic oxygen test process; the method has the advantages that the step of out-of-tank weighing detection in the test process is reduced, process test errors are avoided, the accuracy of atomic oxygen test data is improved, multi-angle atomic oxygen erosion on-line monitoring is realized, and the research and development, application and development progress of aerospace products is promoted.
Description
Technical Field
The invention relates to the field of long-life and low-orbit spacecraft space atomic oxygen environment performance testing, in particular to a multi-angle atomic oxygen test online monitoring device and method.
Background
The Low Earth Orbit (LEO) refers to an orbit with the height of 200 km-700 km, and due to the higher running speed of the spacecraft and the larger oxidizability of atomic oxygen, exposed materials on the outer surface of the spacecraft in the orbit space are seriously threatened by the atomic oxygen. The space flight test has incomparable advantages for researching the atomic oxygen effect of the aerospace material and testing the main function and performance change of the aerospace material in the rail service life, but the flight test has extremely high cost and few carrying opportunities, so the ground simulation test still has extremely important practical significance.
Therefore, requirements are provided for a ground atomic oxygen test method and atomic oxygen on-line monitoring. The Li Tao patent 'method for testing atomic oxygen resistance of long-life spacecraft material' provides an innovative design for aspects of test sample treatment, vacuum, temperature control and the like. Zhengkuhai article 'model for calculating atomic oxygen flux density at different attack angles of spacecraft in low earth orbit', adopts a programming design method to calculate the atomic oxygen flux density. The ginger and Haifu patent 'testing method for the action of fragments of materials with protective coatings and atomic oxygen for spacecraft' provides a performance degradation condition evaluation method for the space fragments of materials with protective coatings and the atomic oxygen environment. Yangsheng 'an atomic oxygen integral flux measuring method and an atomic oxygen sensor' adopts a Wheatstone bridge-based method to measure the atomic oxygen flux, but the method is sensitive to a temperature environment.
However, no on-line monitoring device and method for multi-angle atomic oxygen test are available, and atomic oxygen simulation equipment used on the ground can be mainly divided into two categories, namely a thermal plasma type and a directional beam flow type. At present, the atomic oxygen test mechanism of most products is not clear, and the test process has randomness. On the premise that it is impossible to develop ground simulation equipment which is the same as the real atomic oxygen action environment of an LEO space, researchers basically adopt an effect equivalent method. However, a series of differences from the actual space environment brought by ground acceleration test may affect the equivalence of the atomic oxygen effect. This difference mainly includes the following aspects:
1. the ground acceleration test can only simulate a vertical angle;
2. test interruption may occur in the ground test, which affects the existence of the sample;
3. the damage of the test sample when weighing can occur in the ground test;
4. the space has comprehensive environments of high and low temperature, irradiation and the like.
Up to now, atomic oxygen ground simulation tests have not yet formed a mandatory standard test specification, which directly leads to the fact that the testers in atomic oxygen test tests do not choose among different test methods and test conditions. Even with highly experienced researchers, different testing procedures may affect the reproducibility and validity of test results.
Disclosure of Invention
The invention aims to solve the problem of on-line monitoring of a ground atomic oxygen test, and designs an on-line monitoring device for on-line monitoring of atomic oxygen erosion at different angles aiming at the ground atomic oxygen simulation test.
In order to achieve the above object, the present invention provides an online monitoring device for multi-angle atomic oxygen test, comprising:
testing the cabin;
install atomic oxygen generator and control system on experimental cabin body, it contains: an atomic oxygen generator and an atomic oxygen generator control system;
a frequency testing system mounted on a test capsule, comprising: a frequency detection system and a frequency receiving system;
install mechanical control and piezoelectric system on experimental cabin body, it contains: the device comprises a displacement control mechanism, a thickness monitoring platform, a test sample, a temperature control platform and vibration feedback control;
a vacuum system communicated with the test chamber body;
a supporting platform for fixing experimental cabin body, and
and the thickness monitoring system is connected with the frequency testing system, the mechanical control system and the piezoelectric system in a wireless or wired mode.
Preferably, the thickness monitoring system can monitor the thickness change condition of the test sample on line, so as to obtain the thickness change condition Δ d of the test sample after atomic oxygen degradation: d ═ d0D, wherein d0Is the initial thickness of the test sample and d is the real-time thickness of the test sample monitored on-line.
Preferably, the mechanical control and piezoelectric system uses a piezoelectric ceramic material to monitor the frequency of the test sample, so as to obtain the real-time thickness d of the test sample,
wherein f is the measured resonance frequency and E is that of the test sampleAnd (3) the comprehensive elastic modulus, L is the length of the suspended area of the test sample, and rho is the comprehensive density of the test sample.
Preferably, the mechanical control and displacement control mechanism of the piezoelectric system can realize the rotation of the test sample by 0-90 degrees.
Preferably, the temperature control platform can control the temperature of the test sample, and the temperature control range is-180 ℃ to +200 ℃.
The invention also provides an online monitoring method for the multi-angle atomic oxygen test, which comprises the following steps:
step one, manufacturing a test sample, wherein the length of a suspended part of a fixed support is L, the width is b, and the thickness is d0；
Step two, mounting a test sample, so that the test sample is positioned between the thickness monitoring platform and the temperature control platform and forms a mechanical control and piezoelectric system with vibration feedback control;
step three, mounting the mechanical control and piezoelectric system on the test cabin;
step four, closing the test cabin body, and vacuumizing to 10-3Adjusting the angle between the surface of the test sample and the atomic oxygen generator to a set value through a displacement control mechanism below Pa;
step five, before the test, detecting the thickness of the test sample through a thickness monitoring system, and recording thickness data d before the test0；
Opening the atomic oxygen generator and the control system to start a test, and measuring the real-time thickness d of the test sample;
step seven, calculating a thickness variation value delta d: d-d0And converting the atomic oxygen cumulative flux to obtain the atomic oxygen cumulative flux under a set angle.
Preferably, in the sixth step, the real-time thickness d of the test sample is obtained through monitoring by the thickness monitoring system. And the thickness monitoring system is used for realizing online monitoring on the sample by means of atomic oxygen test equipment.
Preferably, in the first step, a layer of piezoelectric material with a thickness d is mounted on the lower surface of the test samplexAnd d isx：d0＝0.01～0.1：1。
Preferably, in the sixth step, the mechanical control and piezoelectric system monitors the frequency of the test sample through the piezoelectric ceramic material, so as to obtain the real-time thickness d of the test sample,
wherein f is the measured resonant frequency, E is the comprehensive elastic modulus of the test sample, L is the length of the suspended area of the test sample, and rho is the comprehensive density of the test sample.
Preferably, in the sixth step, the temperature control platform is adopted to control the temperature of the test sample, and the temperature control range is-180 ℃ to +200 ℃.
The multi-angle atomic oxygen test online monitoring device and the monitoring method can effectively solve the problem of the relation between the test sample degradation condition and the atomic oxygen accumulated flux in the ground atomic oxygen test process; the method has the advantages that the step of out-of-tank weighing detection in the test process is reduced, process test errors are avoided, the accuracy of atomic oxygen test data is improved, multi-angle atomic oxygen erosion on-line monitoring is realized, and the research and development, application and development progress of aerospace products is promoted.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a multi-angle atomic oxygen test on-line monitoring device provided by the invention.
FIG. 2 is a schematic view of the multi-angle atomic oxygen test mechanical control and piezoelectric system and the test chamber installation provided by the present invention.
FIG. 3 is a schematic diagram of a mechanical control and piezoelectric system in a multi-angle atomic oxygen test provided by the present invention.
FIG. 4 is a schematic view of the assembly of a test sample and a mechanical control and piezoelectric system in the multi-angle atomic oxygen test on-line monitoring device provided by the invention.
FIG. 5 is an illustration of the atomic oxygen test sample dimensions and clamped interface provided by the present invention.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings of embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.
The present invention will now be further described by way of detailed description of preferred embodiments in accordance with the present invention.
As shown in fig. 1 and fig. 2, the multi-angle atomic oxygen test online monitoring device according to the embodiment of the present invention includes an atomic oxygen generator and control system, a frequency testing system, a mechanical control and piezoelectric system 3, a test chamber 4, a vacuum system 5, a support platform 6, a thickness monitoring system 7, and the like.
The atomic oxygen generator and the control system are composed of an atomic oxygen generator 1-1 and an atomic oxygen generator control system 1-2.
The frequency testing system consists of a frequency detection system 2-1 and a frequency receiving system 2-2, wherein the frequency detection system 2-1 is used for detecting the frequency of the test sample; the frequency receiving system 2-2 receives the frequency and then sends the frequency to the thickness monitoring system 7 for processing, and the real-time thickness of the test sample can be obtained through calculation.
The mechanical control and piezoelectric system 3 is composed of a displacement control mechanism 3-1, a thickness monitoring platform 3-2, a temperature control platform 3-3, a vibration feedback control 3-4 and a test sample 3-5, and is shown in figure 3. The thickness monitoring platform 3-2 is used for clamping a test sample and determining the lengths of the sample fixing and supporting interface and the suspended part. The temperature control platform 3-3 is used for controlling the temperature in the test process. The vibration feedback control 3-4 is part of the mechanical control and is used for improving the mechanical control precision.
The specific working steps of the multi-angle atomic oxygen test on-line monitoring method are as follows:
step oneTest samples 3-5 were made, which were generally elongated in size. The length of the suspended portion of the fixed-branch interface is L, the width of the suspended portion is b (effective area for calculating test, e.g., S ═ L × b), and the thickness of the suspended portion is d0，L0Is the physical dimension of the test sample. The test samples 3-5 had a layer of piezoelectric material (e.g., piezoceramic material) on the lower surface and had a thickness dxWherein d isxMuch smaller than d0(preferably, d)x：d00.01-0.1: 1) see fig. 5. The piezoelectric material can feed back vibration signals and transmit the vibration signals through electric signals, and the thickness of the piezoelectric material is far less than d0The resonance interference of the piezoelectric material to the test sample is reduced. The fixed branch interface is used for installing a test sample, wherein the fixed branch end is installed on the thickness monitoring platform and does not participate in the atomic oxygen test; the suspended area of the sample is not fixed and is exposed in the atomic oxygen beam environment.
Step two, installing a test sample 3-5: the test sample 3-5 is located between the thickness monitoring platform 3-2 and the temperature control platform 3-3, and forms a mechanical control and piezoelectric system 3 with the vibration feedback control 3-4, as shown in fig. 4.
And step three, mounting the mechanical control and piezoelectric system 3 on the atomic oxygen test chamber body 4.
Step four, closing the atomic oxygen test chamber body 4, vacuumizing to 10-3And adjusting the angle between the surface of the test sample 3-5 and the atomic oxygen generator 1-1 to reach a set value below Pa. Wherein, the displacement control mechanism 3-1 of the mechanical control and piezoelectric system 3 can realize the rotation of 0 to 90 degrees.
Step five, detecting the thickness of the test sample 3-5 through a thickness monitoring system 7 before the test, and recording the thickness data d before the test0. And opening the atomic oxygen generator and the control system to start the test. Under a certain angle, the frequency detection system 2-1 and the frequency receiving system 2-2 are used for monitoring the test sample 3-5 to obtain the frequency f of the test sample 3-5 under a certain atomic oxygen erosion flux, the thickness monitoring system 7 is used for obtaining the thickness change value delta d (the thickness d monitored in the experiment,
Δd＝d-d0) And 3-5 thickness changes of the test sample can be recorded in real time in the test process. And the atomic oxygen test result is monitored on line through the thickness change condition of the test sample.
The test process can control the temperature of the test sample, and the temperature control capability reaches minus 180 ℃ to plus 200 ℃.
Experiments prove that the thickness monitoring system 7 is used for detecting the test samples 3-5 in real time to obtain the thickness change of the test samples, and then the atomic oxygen accumulated flux is converted according to the atomic oxygen degradation coefficient a of 3: 3 × 10 of the DuPont HN type polyimide material-24cm3And/atom, the cumulative flux of atomic oxygen at a set angle is obtained (flux Q ═ Δ d × s/a, s is the area of the test sample, and s ═ L ×, b).
The invention can effectively solve the problem of the relationship between the sample degradation condition and the atomic oxygen cumulative flux in the ground atomic oxygen test process; the method has the advantages that the step of out-of-tank weighing detection in the test process is reduced, process test errors are avoided, the accuracy of atomic oxygen test data is improved, multi-angle atomic oxygen erosion on-line monitoring is realized, and the research and development, application and development progress of aerospace products is promoted.
The multi-angle atomic oxygen test online monitoring device and method provided by the invention can provide an effective solution for the environmental simulation of the atomic oxygen test on the ground of the space material.
Those not described in detail in this specification are within the skill of the art. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. The utility model provides a multi-angle atomic oxygen test on-line monitoring device which characterized in that, the device contains:
testing the cabin;
install atomic oxygen generator and control system on experimental cabin body, it contains: an atomic oxygen generator and an atomic oxygen generator control system;
a frequency testing system mounted on a test capsule, comprising: a frequency detection system and a frequency receiving system;
install mechanical control and piezoelectric system on experimental cabin body, it contains: the device comprises a displacement control mechanism, a thickness monitoring platform, a test sample, a temperature control platform and vibration feedback control;
a vacuum system communicated with the test chamber body;
a supporting platform for fixing experimental cabin body, and
and the thickness monitoring system is connected with the frequency testing system, the mechanical control system and the piezoelectric system in a wireless or wired mode.
2. The multi-angle atomic oxygen test on-line monitoring device of claim 1, wherein the thickness monitoring system can obtain the thickness change condition Δ d of the test sample after atomic oxygen degradation by on-line monitoring the thickness change condition of the test sample: d ═ d0D, wherein d0Is the initial thickness of the test sample and d is the real-time thickness of the test sample monitored on-line.
3. The multi-angle atomic oxygen test on-line monitoring device as claimed in claim 1, wherein the mechanical control and piezoelectric system uses piezoelectric material layer to test sampleThe frequency of the test sample is monitored to obtain the real-time thickness d of the test sample,
wherein f is the measured resonant frequency, E is the comprehensive elastic modulus of the test sample, L is the length of the suspended area of the test sample, and rho is the comprehensive density of the test sample.
4. The multi-angle atomic oxygen test on-line monitoring device of claim 1, wherein the mechanical control and displacement control mechanism of the piezoelectric system can realize the rotation of the test sample by 0-90 °.
5. The multi-angle atomic oxygen test on-line monitoring device of claim 1, wherein the temperature control platform can control the temperature of the test sample, and the temperature control range is-180 ℃ to +200 ℃.
6. A multi-angle atomic oxygen test on-line monitoring method, which adopts the multi-angle atomic oxygen test on-line monitoring device of any one of claims 1 to 5, and is characterized in that the method comprises the following steps:
step one, manufacturing a test sample, wherein the length of a suspended part of a fixed support is L, the width is b, and the thickness is d0；
Step two, mounting a test sample, so that the test sample is positioned between the thickness monitoring platform and the temperature control platform and forms a mechanical control and piezoelectric system with vibration feedback control;
step three, mounting the mechanical control and piezoelectric system on the test cabin;
step four, closing the test cabin body, and vacuumizing to 10-3Adjusting the angle between the surface of the test sample and the atomic oxygen generator to a set value through a displacement control mechanism below Pa;
step five, before the test, detecting the thickness of the test sample through a thickness monitoring system, and recording thickness data d before the test0；
Opening the atomic oxygen generator and the control system to start a test, and measuring the real-time thickness d of the test sample;
step seven, calculating a thickness variation value delta d: d-d0And converting the atomic oxygen cumulative flux to obtain the atomic oxygen cumulative flux under a set angle.
7. The multi-angle atomic oxygen test on-line monitoring method as claimed in claim 6, wherein in step six, the real-time thickness d of the test sample is obtained through monitoring by the thickness monitoring system.
8. The multi-angle atomic oxygen test on-line monitoring method as claimed in claim 6, wherein in the first step, a layer of piezoelectric material with a thickness d is mounted on the lower surface of the test samplexAnd d isx：d0＝0.01～0.1：1。
9. The multi-angle atomic oxygen test on-line monitoring method of claim 8, wherein in step six, the mechanical control and piezoelectric system monitors the frequency of the test sample through the piezoelectric ceramic material, so as to obtain the real-time thickness d of the test sample,
wherein f is the measured resonant frequency, E is the comprehensive elastic modulus of the test sample, L is the length of the suspended area of the test sample, and rho is the comprehensive density of the test sample.
10. The multi-angle atomic oxygen test on-line monitoring method as claimed in claim 6, wherein in the sixth step, the temperature control platform is adopted to control the temperature of the test sample, and the temperature control range is from-180 ℃ to +200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811087657.0A CN108974398B (en) | 2018-09-18 | 2018-09-18 | Multi-angle atomic oxygen test online monitoring device and monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811087657.0A CN108974398B (en) | 2018-09-18 | 2018-09-18 | Multi-angle atomic oxygen test online monitoring device and monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108974398A CN108974398A (en) | 2018-12-11 |
| CN108974398B true CN108974398B (en) | 2020-08-11 |
Family
ID=64545638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811087657.0A Active CN108974398B (en) | 2018-09-18 | 2018-09-18 | Multi-angle atomic oxygen test online monitoring device and monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108974398B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201133900Y (en) * | 2007-12-04 | 2008-10-15 | 北京卫星环境工程研究所 | System for measuring space atomic oxygen environmental simulation experiment VUV |
| CN102175665B (en) * | 2011-02-11 | 2013-01-16 | 哈尔滨工业大学 | Experiment device for simulating atomic oxygen oxidation ground of super-high temperature heat-protection material |
| CN102706312A (en) * | 2012-06-29 | 2012-10-03 | 北京卫星环境工程研究所 | Testing system for elemental oxygen scattering angle distribution and erosion ratio measurement |
| US10249509B2 (en) * | 2012-11-09 | 2019-04-02 | Tokyo Electron Limited | Substrate cleaning method and system using atmospheric pressure atomic oxygen |
| CN107024496A (en) * | 2017-03-29 | 2017-08-08 | 北京卫星环境工程研究所 | Spacecraft Material elemental oxygen and heat cycle effect test method |
-
2018
- 2018-09-18 CN CN201811087657.0A patent/CN108974398B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108974398A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chavers et al. | Momentum flux measuring instrument for neutral and charged particle flows | |
| WO2014107827A1 (en) | Testing device for simulating service environment of thermal barrier coating and detecting failure of thermal barrier coating in real time | |
| CN206192402U (en) | Gaseous little water of SF6, density on -line monitoring system | |
| CN109855835B (en) | Wind tunnel inner section wind speed monitoring device, monitoring system and monitoring method | |
| CN100592080C (en) | Device and method for measuring explosive article coefficient of linear expansion | |
| CN107709969A (en) | Coating residual stress test method and instrument | |
| Qin et al. | A novel dynamometer for monitoring milling process | |
| CN108974398B (en) | Multi-angle atomic oxygen test online monitoring device and monitoring method | |
| CN113587992A (en) | Ultrasonic double-wave measurement method, application and equipment for pretightening force and temperature of solid material | |
| CN111412951B (en) | Sensor for monitoring vibration fatigue load of mechanical part in real time under impact load and design method | |
| CN104990849A (en) | Oil-gas subsea pipeline silt carrying capacity online monitoring device and method based on bridge balance | |
| CN109387349A (en) | A kind of fractal antenna window surface heat flux and device for pressure measurement | |
| CN111664920A (en) | Device for accurately measuring sample mass change under microwave action | |
| Friehe | Fine-scale measurements of velocity, temperature, and humidity in the atmospheric boundary layer | |
| Goyne et al. | Transducer for direct measurement of skin friction in hypervelocity impulse facilities | |
| CN115372013A (en) | Comprehensive test platform and test method for engine and air entraining system | |
| CN1779452A (en) | Method for measuring polymer-base foam material linear expansion coefficient by displacement sensor | |
| CN114993392A (en) | Vortex street moisture flow measuring method based on acceleration amplitude modeling | |
| CN204855313U (en) | Oil gas sea pipe volume of taking sand on -line monitoring device based on bridge balance | |
| CN209102329U (en) | A kind of fractal antenna window surface heat flux and device for pressure measurement | |
| Lai et al. | Processing monitoring of carbon/phenolic composites using smart sensors | |
| Iqbal et al. | Performance Evaluation of Low-Cost Vibration Sensors in Industrial IoT Applications | |
| Zhang et al. | Waveform Prediction of Blade Tip-Timing Sensor Based on Kriging Model and Static Calibration Data | |
| CN109297899A (en) | A kind of drag-line corrosion sensor | |
| CN117129320A (en) | Pre-tensioning force detection method for membrane material of existing membrane structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |