CN204330593U - Contamination level of oil liquid detecting sensor - Google Patents
Contamination level of oil liquid detecting sensor Download PDFInfo
- Publication number
- CN204330593U CN204330593U CN201420726564.9U CN201420726564U CN204330593U CN 204330593 U CN204330593 U CN 204330593U CN 201420726564 U CN201420726564 U CN 201420726564U CN 204330593 U CN204330593 U CN 204330593U
- Authority
- CN
- China
- Prior art keywords
- trans
- photodiode
- impedance amplifier
- oil sump
- contamination level
- 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.)
- Expired - Fee Related
Links
- 238000011109 contamination Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 title claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 229910052594 sapphire Inorganic materials 0.000 claims description 6
- 239000010980 sapphire Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 238000007639 printing Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 43
- 239000002245 particle Substances 0.000 description 12
- 239000013618 particulate matter Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000254 damaging effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a kind of contamination level of oil liquid detecting sensor, belong to the sensor detected for contamination level of oil liquid in pollution detection technical field, its object is to provide that a kind of volume is little, quality light, detect the reliable contamination level of oil liquid detecting sensor of data.Its technical scheme is: comprise the light emitting diode I, oil sump, photodiode I and the photoelectric switching circuit that connect successively, described photoelectric switching circuit is connected with RS485 bus, described oil sump is provided with incident light lens near light emitting diode I side, described oil sump is provided with emergent light lens near photodiode I side; The parallel beam that described light emitting diode I sends through after oil sump through incident light lens is radiated on photodiode I produces electric signal through emergent light lens again, and described electric signal is exported by RS485 bus after photoelectric switching circuit.The utility model is applicable to the sensor that contamination level of oil liquid detects.
Description
Technical field
The utility model belongs to pollution detection technical field, relates to a kind of sensor detected for contamination level of oil liquid, is specifically related to a kind of contamination level of oil liquid detecting sensor based on photovoltaic principals.
Background technology
In recent decades, hydrostatic transmission is widely used in the technical fields such as aviation, machine-building, petrochemical complex, mining machinery, communications and transportation, shipbuilding and earthquake prediction.Along with the usage quantity of hydraulically operated equipment (HOE) and increasing of kind, break down and the workload of keeping in repair also more and more large.And according to domestic and international statistical data, the failure rate more than 75% of hydraulically operated equipment (HOE) is caused by hydraulic oil pollution, and solid particulate matter is the pollutant the most general in hydraulic and lubricating system, damaging effect is maximum.
Along with hydraulic technique is in the widespread use of each industrial sector, the functional reliability of hydraulically operated equipment (HOE) is had higher requirement.Therefore, must detect the pollution situation of hydraulic system, carry out Environmental capacity.It is by regularly sampling at the scene that traditional oil contamination detects, and sample is taken back laboratory and carries out analysis acquisition mechanical movement situation.Although the detection of this off-line has the multifarious advantage of the equipment of analysis and means, there is acquisition long for information cycle, the deficiencies such as the operation conditions of equipment can not be reflected in time.Therefore, be badly in need of finding a kind of detection method more timely and effectively newly.
Application number is that the utility model patent of 201320510929.X discloses a kind of oil particle pollution degree detection sensor, this sensor comprises sleeve, semiconductor laser, measuring sonde, photoelectric switching circuit and signal processing circuit, some lens are provided with between measuring sonde and semiconductor laser, nozzle assembly is provided with in sleeve, fixing collimating mirror is embedded in nozzle assembly, the first slide block be connected with nozzle assembly, first slide block is fixed with filter mirror, second slide block, be fixed on the fourier lense in the second slide block, the sleeve other end is connected with bump joint, the fixture splice be connected with bump joint, and the one group of lens be located in fixture splice, one group of lens is fixed in fixture splice through screwed assembly.This sensor is based on photovoltaic principals, by reasonably arranging all kinds of optical lens, pass through in fluid to be detected oil inlet passage gap through between one group of lens, laser arrives the two ends generation current signal of reception diode after multiple lens, the light path design that this sensor has is simple, but its volume is comparatively large, heavier mass, and it is reliable not to detect data.
Summary of the invention
The purpose of this utility model is to provide that a kind of volume is little, quality light, detect the reliable contamination level of oil liquid detecting sensor of data.
For achieving the above object, the technical solution of the utility model is:
A kind of contamination level of oil liquid detecting sensor, it is characterized in that: comprise the constant-power power source circuit, light emitting diode I, oil sump, photodiode I and the photoelectric switching circuit that connect successively, described photoelectric switching circuit is connected with RS485 bus, described oil sump is provided with incident light lens near light emitting diode I side, described oil sump is provided with emergent light lens near photodiode I side; The parallel beam that described light emitting diode I sends power invariability under the effect of constant-power power source circuit through after oil sump through incident light lens is radiated on photodiode I produces electric signal through emergent light lens again, and described electric signal is exported by RS485 bus after photoelectric switching circuit.
During utility model works, under the effect of constant-power power source circuit, the directional light of light emitting diode I generation power invariability is entered in oil sump by incident light lens, if there is particle to occur in oil sump, these particles will stop light and cause the reduction of luminous energy; Emergent light lens lighting is passed through on photodiode I through the light after oil sump, because the particle in oil sump has blocked some light, thus light intensity decays photodiode I received, by detecting the reduction degree being irradiated to luminous energy on photodiode I and the size and the content that succinctly calculate particle in oil sump, reliablely and stablely oil-liquid-solid particle pollution degree can be provided to detect data, and detect accurately fast.
The purpose of this utility model can also be realized by following approach:
Described incident light lens and emergent light lens are sapphire glass lens.
Described incident light lens are provided with opaque aluminium film, and described opaque aluminium center membrane position offers the viewing window for printing opacity.
Described photoelectric switching circuit comprises:
First trans-impedance amplifier, the positive ends of described first trans-impedance amplifier is connected with the positive ends of the second trans-impedance amplifier, and simultaneously ground connection,
The negative polarity end of described first trans-impedance amplifier is connected with one end of the first resistance with the anode of photodiode I respectively; The negative electrode of described photodiode I is connected with one end of the second resistance with the negative polarity end of described second trans-impedance amplifier respectively; The output terminal of the first trans-impedance amplifier described in another termination of described first resistance; The output terminal of the second trans-impedance amplifier described in another termination of described second resistance; The differential voltage V1-V2 of described first trans-impedance amplifier and described second trans-impedance amplifier output photoelectric conversion.
First electric capacity and the second electric capacity, described first Capacitance parallel connection connects described first resistance, and described second Capacitance parallel connection connects described second resistance.
Compared with prior art, the beneficial effects of the utility model are:
1, in the utility model, the photoelectric sensing parts of sensor adopt light emitting diode I and photodiode I, make that the compact overall structure of sensor, volume are little, quality is light; Under the effect of constant-power power source circuit, the directional light of light emitting diode I generation power invariability is entered in oil sump by incident light lens, if there is particle to occur in oil sump, these particles will stop light and cause the reduction of luminous energy; Emergent light lens lighting is passed through on photodiode I through the light after oil sump, because the particle in oil sump has blocked some light, thus light intensity decays photodiode I received, by detecting the reduction degree being irradiated to luminous energy on photodiode I and the size and the content that succinctly calculate particle in oil sump, reliablely and stablely oil-liquid-solid particle pollution degree can be provided to detect data, and detect accurately fast.
2, in the present embodiment, incident light lens and emergent light lens all adopt sapphire glass lens, and sapphire glass lens can be used as the form mirror at oil sump two ends, conveniently check situation in oil sump, and sapphire glass lens have good thermal characteristics, fabulous electrical specification and dielectric property, and anti-chemical corrosion, it is high temperature resistant, heat conduction is good, hardness is high, thoroughly infrared, and chemical stability is good.
3, in the present embodiment, incident light lens are provided with opaque aluminium film, described opaque aluminium center membrane position offers the viewing window for printing opacity, the directional light that light emitting diode I produces is injected in oil sump by viewing window, effectively can stop that all the other rays pass through lens are injected in oil sump, improve the detection efficiency of sensor, detect data more reliable.
4, in the present embodiment, photoelectric switching circuit is by being connected in parallel the first trans-impedance amplifier and the second trans-impedance amplifier, make the differential voltage V 1-V2 that its output photoelectric is changed, circuit provided by the invention efficiently utilizes supply voltage scope, improves speed and the interference free performance of photoelectric switching circuit.
5, in the present embodiment, when the first resistance and the second resistance are connected in parallel to the first electric capacity and the second electric capacity respectively, improve the filtering performance of photoelectric switching circuit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the circuit diagram of constant-power power source circuit in the utility model;
Fig. 3 is the circuit diagram of photoelectric switching circuit in the utility model;
Fig. 4 is the circuit diagram of photoelectric switching circuit in another embodiment of the utility model;
Wherein, Reference numeral is: 1-light emitting diode I, 2-incident light lens, 3-oil sump, 4-emergent light lens, 5-photodiode I, 6-photoelectric switching circuit, 7-constant-power power source circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
Embodiment one
A kind of contamination level of oil liquid detecting sensor, comprise the constant-power power source circuit 7, light emitting diode I1, oil sump 3, photodiode I5 and the photoelectric switching circuit 6 that connect successively, photoelectric switching circuit 6 is connected with RS485 bus, oil sump 3 two ends are by being communicated with hydraulic system return line respectively by inlet pipe joint, outlet pipe connection, oil sump 3 is provided with incident light lens 2 near light emitting diode I1 side, oil sump 3 is provided with emergent light lens near photodiode I5 side.Wherein incident light lens 2 and emergent light lens all adopt sapphire glass lens.The parallel beam that light emitting diode I1 sends through after oil sump 3 through incident light lens 2 is radiated on photodiode I5 produces electric signal through emergent light lens again, and electric signal is exported by RS485 bus after photoelectric switching circuit 6.
Under the effect of constant-power power source circuit 7, the directional light of light emitting diode I1 generation power invariability is entered in oil sump 3 by incident light lens 2, if having particle to occur in oil sump 3, these particles will stop light and cause the reduction of luminous energy; Emergent light lens lighting is passed through on photodiode I5 through the light after oil sump 3, because the particle in oil sump 3 has blocked some light, thus light intensity decays photodiode I5 received, by detecting the reduction degree being irradiated to luminous energy on photodiode I5 and the size and the content that succinctly calculate particle in oil sump 3, reliablely and stablely oil-liquid-solid particle pollution degree can be provided to detect data, and detect accurately fast.
Embodiment two
On the basis of embodiment one, incident light lens 2 are provided with opaque aluminium film, and this opaque aluminium film can be fitted in incident light lens 2 both sides or wherein side, and opaque aluminium center membrane position offers the viewing window for printing opacity.By being provided with opaque aluminium film on incident light lens 2, described opaque aluminium center membrane position offers the viewing window for printing opacity, the directional light that light emitting diode I1 produces is injected in oil sump 3 by viewing window, effectively can stop that all the other rays pass through lens are injected in oil sump 3, improve the detection efficiency of sensor, detect data more reliable.
Embodiment three
On the basis of embodiment one or embodiment two, in photoelectric switching circuit 6 as shown in Figure 3, this photoelectric switching circuit 6 comprises the first trans-impedance amplifier A1, and the positive ends of the first trans-impedance amplifier A1 is connected with the positive ends of the second trans-impedance amplifier A2, and simultaneously ground connection;
The negative polarity end of the first trans-impedance amplifier A1 is connected with one end of the first resistance R1 with the anode of photodiode D respectively; The negative electrode of photodiode D is connected with one end of the second resistance R2 with the negative polarity end of the second trans-impedance amplifier A2 respectively; The output terminal of another termination first trans-impedance amplifier A1 of the first resistance R1; The output terminal of another termination second trans-impedance amplifier A2 of the second resistance R2; The differential voltage V1-V2 of the first trans-impedance amplifier A1 and the conversion of the second trans-impedance amplifier A2 output photoelectric.
Embodiment four
On the basis of embodiment three, also comprise the first electric capacity C1 and the second electric capacity C2, the first electric capacity C1 is connected in parallel the first resistance R1, and the second electric capacity C2 is connected in parallel the second resistance R2.
Embodiment five
On the basis of embodiment one or embodiment two, as described in Figure 4 in photoelectric switching circuit, A1, A2 are operational amplifier OP27, T1 is semiconductor laser diode, and T2 is light receiving tube, and T1 positive pole is connected with+14V direct supply by resistance R3, the direct ground connection of negative pole.Light receiving tube triode T2 collector is connected with the input end 2 of operational amplifier A 1, and emitter is connected with the input end 3 of operational amplifier A 1.Resistance R1 two ends are connected with output terminal 6 with the input end 2 of operational amplifier A 1 respectively, and resistance R4 connects the output terminal 6 of operational amplifier A 1 and the input end 3 of operational amplifier A 2.Resistance R2 one end is connected publicly with circuit, the other end is connected with the input end 2 of operational amplifier A 2, electric capacity C1 is connected with output terminal 6 with the input end 2 respectively at operational amplifier A 2 after potentiometer R5 parallel connection, the collector of the output terminal 6 of resistance R6 Linked operators amplifier A2 and the base stage triode T3 of triode T3 connects the direct supply of+14V, launches being input in passage of very signal.
Embodiment six
On the basis of above-described embodiment, also be provided with control module, this control module can be the minimum system of single-chip microcomputer, DSP or FPGA/CPLD, or minimum system adding portion peripheral hardware forms, have high-precision a/d converter and certain computing, control ability, control module compartment of terrain sends ultraviolet light start pulse signal.This control module is electrically connected with light emitting diode I1, and this control module compartment of terrain sends start pulse signal, and the start pulse signal that this light emitting diode I1 reception control unit sends also correspondingly sends directional light directive oil sump 3 according to this start pulse signal.This control module is electrically connected with photodiode I5 or photoelectric switching circuit 6, electric signal corresponding to light transmitted through oil sump is delivered to control module by this photodiode I5 or photoelectric switching circuit 6, and this control module obtains the judged result of solid particle pollution degree in oil sump 3 according to the electric signal received.
Claims (5)
1. a contamination level of oil liquid detecting sensor, it is characterized in that: comprise the constant-power power source circuit (7), the light emitting diode I(1 that connect successively), oil sump (3), photodiode I(5) and photoelectric switching circuit (6), described photoelectric switching circuit (6) is connected with RS485 bus, described oil sump (3) is upper near light emitting diode I(1) side is provided with incident light lens (2), described oil sump (3) is upper near photodiode I(5) side is provided with emergent light lens (4); Described light emitting diode I(1 under the effect of constant-power power source circuit (7)) send power invariability parallel beam through incident light lens (2) through after oil sump (3) again through emergent light lens (4) and be radiated at photodiode I(5) on produce electric signal, described electric signal is exported by RS485 bus after photoelectric switching circuit (6).
2. contamination level of oil liquid detecting sensor as claimed in claim 1, is characterized in that: described incident light lens (2) and emergent light lens (4) are sapphire glass lens.
3. contamination level of oil liquid detecting sensor as claimed in claim 2, it is characterized in that: described incident light lens (2) are provided with opaque aluminium film, described opaque aluminium center membrane position offers the viewing window for printing opacity.
4. contamination level of oil liquid detecting sensor as claimed in claim 1, is characterized in that: described photoelectric switching circuit (6) comprising:
First trans-impedance amplifier (A1), the positive ends of described first trans-impedance amplifier (A1) is connected with the positive ends of the second trans-impedance amplifier (A2), and simultaneously ground connection,
The negative polarity end of described first trans-impedance amplifier (A1) is connected with one end of the first resistance (R1) with the anode of photodiode (D) respectively; The negative electrode of described photodiode (D) is connected with one end of the second resistance (R2) with the negative polarity end of described second trans-impedance amplifier (A2) respectively; The output terminal of the first trans-impedance amplifier (A1) described in another termination of described first resistance (R1); The output terminal of the second trans-impedance amplifier (A2) described in another termination of described second resistance (R2); The differential voltage V1-V2 of described first trans-impedance amplifier (A1) and the conversion of described second trans-impedance amplifier (A2) output photoelectric.
5. contamination level of oil liquid detecting sensor as claimed in claim 4, it is characterized in that: the first electric capacity (C1) and the second electric capacity (C2), described first electric capacity (C1) is connected in parallel described first resistance (R1), and described second electric capacity (C2) is connected in parallel described second resistance (R2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420726564.9U CN204330593U (en) | 2014-11-26 | 2014-11-26 | Contamination level of oil liquid detecting sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420726564.9U CN204330593U (en) | 2014-11-26 | 2014-11-26 | Contamination level of oil liquid detecting sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204330593U true CN204330593U (en) | 2015-05-13 |
Family
ID=53166942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420726564.9U Expired - Fee Related CN204330593U (en) | 2014-11-26 | 2014-11-26 | Contamination level of oil liquid detecting sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204330593U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760045A (en) * | 2018-05-25 | 2018-11-06 | 西安工业大学 | A kind of photodetection circuit of Larger Dynamic range |
| CN112739488A (en) * | 2018-08-22 | 2021-04-30 | 奥托立夫开发公司 | Device and method for detecting laser welding protective glass |
-
2014
- 2014-11-26 CN CN201420726564.9U patent/CN204330593U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760045A (en) * | 2018-05-25 | 2018-11-06 | 西安工业大学 | A kind of photodetection circuit of Larger Dynamic range |
| CN108760045B (en) * | 2018-05-25 | 2023-12-15 | 西安工业大学 | A kind of photoelectric detection circuit with large dynamic range |
| CN112739488A (en) * | 2018-08-22 | 2021-04-30 | 奥托立夫开发公司 | Device and method for detecting laser welding protective glass |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103424606B (en) | A kind of low voltage electric power carrier communication zero cross detection circuit of frequency self-adaption | |
| CN105222076B (en) | A kind of solar-tracking passes illuminating apparatus | |
| CN204330593U (en) | Contamination level of oil liquid detecting sensor | |
| CN201945571U (en) | Multi-point measurement and control system for air quality in large space | |
| CN105739595A (en) | Device and method for tracing maximum power point under partial shade of photovoltaic power generation system | |
| CN204241341U (en) | A kind of dustiness detecting sensor based on photovoltaic principals | |
| CN204330571U (en) | Oil Contamination in Hydraulic System intelligent checking system | |
| CN204330538U (en) | Based on the contamination level of oil liquid detecting sensor of photovoltaic principals | |
| CN103809604A (en) | Dish type solar heat power generation tracking control system | |
| CN204330592U (en) | A kind of Oil Contamination in Hydraulic System intelligent checking system | |
| CN204535664U (en) | A kind of wide range optical intensity modulation type optical fibre displacement sensor of new structure | |
| CN203350386U (en) | Photovoltaic inverter multi-path input reverse-connection detection circuit with self-diagnosis function | |
| CN204330548U (en) | A kind of contamination level of oil liquid detecting sensor | |
| CN204330572U (en) | A kind of Oil Contamination in Hydraulic System detection system based on photovoltaic principals | |
| CN102706444B (en) | Method for measuring topological charges of optical vortex | |
| CN204330541U (en) | Based on the Oil Contamination in Hydraulic System detection system of photovoltaic principals | |
| CN112485208B (en) | Method and system for detecting solution ion migration under electric field | |
| CN104535480A (en) | Oil pollution degree detection sensor provided with fluorine-containing epoxy resin coating layer | |
| CN204405183U (en) | A kind of laser power feedback device | |
| CN103970151B (en) | A kind of solar energy tracking control device | |
| CN104502312A (en) | Hydraulic system oil pollution degree detection system provided with fluorinated epoxy resin coating layer | |
| CN102289233A (en) | High-sensitivity photosensitive system for sunlight tracker | |
| CN105353822A (en) | Cascade connection intelligent optimization device for battery strings of photovoltaic module | |
| CN201429565Y (en) | Optical fiber semiconductor laser gas analyzer | |
| CN202443122U (en) | Handheld laser distance measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610000, No. 23, No. 2, building 1, No. 2, Tianyu Road, 2 hi tech Zone, Sichuan, Chengdu Patentee after: Keller Detection Technology Co. Ltd. Sichuan measuring Address before: 610000, No. 23, No. 2, building 1, No. 2, Tianyu Road, 2 hi tech Zone, Sichuan, Chengdu Patentee before: SICHUAN KAILE DETECTION TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 610000 room C1003, Chengdu Intelligent Information Industrial Park, No. 898 Bai Cao Road, Chengdu High-tech Zone, Sichuan. Patentee after: SICHUAN KAILE DETECTION TECHNOLOGY CO., LTD. Address before: 610000 No. 2, unit 23, 2, Tianyu Road, 2 High-tech Zone, Chengdu, Sichuan. Patentee before: Keller Detection Technology Co. Ltd. Sichuan measuring |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20191126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |