CN102589404B - Method for measuring displacement by using intelligent differential transformer-type static and dynamic displacement transducer - Google Patents
Method for measuring displacement by using intelligent differential transformer-type static and dynamic displacement transducer Download PDFInfo
- Publication number
- CN102589404B CN102589404B CN 201210017412 CN201210017412A CN102589404B CN 102589404 B CN102589404 B CN 102589404B CN 201210017412 CN201210017412 CN 201210017412 CN 201210017412 A CN201210017412 A CN 201210017412A CN 102589404 B CN102589404 B CN 102589404B
- Authority
- CN
- China
- Prior art keywords
- differential transformer
- displacement
- host computer
- coil
- secondary coil
- 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
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 86
- 230000003068 static Effects 0.000 title claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 11
- 238000009529 body temperature measurement Methods 0.000 claims description 10
- 230000003750 conditioning Effects 0.000 claims description 7
- 230000001105 regulatory Effects 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 description 5
- 230000001131 transforming Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001702 transmitter Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005039 chemical industry Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
The invention discloses an intelligent differential transformer-type static and dynamic displacement transducer and a displacement measuring method thereof. The intelligent differential transformer-type static and dynamic displacement transducer comprises a voltage/current measuring unit, a temperature measuring unit, a processing unit and a memory unit, wherein the voltage/current measuring unit comprises a differential transformer and a voltage/current processing module; the processing unit comprises a processor, a displacement value computing module, a temperature compensating module and a number identifying module; the cross sections of a secondary coil a (2) and a secondary coil b (3) are stepped; the secondary coil a (2) and the secondary coil b (3) are horizontally wound incrementally from the central line of a coil cavity (8) to two ends respectively; and the memory unit at least stores an equipment number, a calibrating linear coefficient and a temperature compensating coefficient. The intelligent differential transformer-type static and dynamic displacement transducer and the displacement measuring method thereof have the advantages that a target displacement value can be directly output; the linear precision of the differential transformer is high; a host machine can operate and control a transducer with a specified number; and the transducer can work independently without the control of the host computer.
Description
Technical field
The present invention relates to a kind of Intelligent differential transformer-type sound state displacement transducer and displacement measurement method thereof.
Background technology
Along with the development of Chinese national economy, the progress of science and technology, the improving constantly of automaticity, the consumption of sensor is increasing, and exploitation new and high technology displacement transducer product has broad prospects.Differential transformation type displacement sensor (LVDT) because it is simple in structure, good linearity, precision is high, measurement range is large, be subject to that extraneous interference is little, dynamic perfromance reaches well the job stability advantages of higher, has been widely used at present the numerous areas such as engineering machinery, space flight and aviation, railway traffic, bridge exploration, chemical industry and scientific research.
Yet, there is the problem of the following aspects in existing differential transformation type displacement sensor: (1) existing displacement transducer mostly can only output current or the intermediate value such as voltage, also need to be processed and calculate through processing and the computing module on backstage, just can obtain displacement of targets value (mm of unit etc.), usually need to arrange a lot of displacement transducers in large-scale supervisory system, the processing on backstage and amount of calculation are just very huge like this, have increased the working load on backstage.(2) as shown in Figure 1, the coil turn of secondary coil institute's coiling from position of center line to both ends of the surface of existing differential transformer is identical, when armature moves to coil end, the output of the electromotive force of generation diminishes, and the linear precision of this conventional coil winding method is poor.(3) we know, temperature drift has a strong impact on the displacement measurement precision in many occasions, and traditional differential transformation type displacement sensor set temperature compensating module not all, have affected the measuring accuracy of displacement of targets value.(4) existing differential transformation type displacement sensor does not arrange the numbering identification module, the also number information of storage sensors not in storage unit, host computer can't specify the sensor of numbering to be operated and control to certain, under the occasion of a large amount of use same sensors, easily cause the confusion of order in system.
Summary of the invention
The object of the invention is to solve the deficiency of existing differential transformer displace￣ ment transducer, provide that a kind of novel high precision, little temperature floated, long life and be output as Intelligent differential transformer-type sound state displacement transducer and the displacement measurement method thereof of displacement of targets value, overcoming traditional differential transformer displace￣ ment transducer can only output current or the intermediate value such as voltage; The coil turn of secondary coil institute's coiling from position of center line to both ends of the surface is identical, and when armature moves toward end face, the electromotive force output of generation diminishes, and linear precision is poor; Set temperature compensating module not, affected the measuring accuracy of displacement of targets value; Transmitter is not numbered, easily causes the shortcomings such as confusion of order.
The objective of the invention is to be achieved through the following technical solutions: Intelligent differential transformer-type sound state displacement transducer, it comprises voltage/current measuring unit, temperature measurement unit, processing unit and storage unit, and voltage/current measuring unit, temperature measurement unit and storage unit are connected with processing unit respectively, the voltage/current measuring unit comprises differential transformer and voltage/current processing module, and the output of differential transformer is connected with the voltage/current processing module, and the output of voltage/current processing module is connected with processing unit, processing unit comprises processor and shift value computing module, temperature compensation module and numbering identification module, described differential transformer comprises primary coil, secondary coil a, secondary coil b, coil rack, magnetic conductive shell, connecting link and the armature of being located at the connecting link top, coil rack is provided with coil bore near a side of magnetic conductive shell, the opposite side of coil rack surrounds hollow reservoir, primary coil is wrapped in the side of coil bore near coil rack, secondary coil a and secondary coil b symmetry are wrapped in the side of coil bore near magnetic conductive shell, the cross section of secondary coil a and secondary coil b is stepped appearance, secondary coil a and secondary coil b press the coiling of incremental manner horizontal symmetrical with the center line of coil bore respectively to two ends, connecting link and armature are positioned at hollow reservoir, storage unit at least stores device numbering, calibration line property coefficient and temperature compensation coefficient.
Temperature measurement unit of the present invention comprises a temperature sensor and an analog to digital converter, and the output of temperature sensor is connected with analog to digital converter, and the output of analog to digital converter is connected with processing unit.
Processing unit of the present invention also can be connected with host computer by communication bus, and communication bus comprises RS-485 bus or CAN bus.
Processor of the present invention comprises microprocessor or field programmable gate array PFGA.
The displacement measurement method of Intelligent differential transformer-type sound state displacement transducer, it comprises the following steps:
(1) drive displacement is conveyed to armature by connecting link by displacement, and armature is the left and right translation in hollow reservoir, makes between the electromotive force of secondary coil a and secondary coil b and produces difference;
Electromotive Difference Of Potential between (2) two secondary coils exports circuit for signal conditioning to, obtains the DC voltage/current value after regulating, then is converted to the target number voltage/current signals and transfers to processing unit through analog to digital converter;
(3) the real-time ambient temperature value of temperature sensor sensing, be converted to the target number temperature signal and transfer to processing unit by analog to digital converter;
(4) the calibration line property coefficient of storing in the processor reading cells, the shift value computing module multiplies each other target number voltage/current signals and calibration line property coefficient, obtains the initial displacement value;
(5) processor is read the penalty coefficient at this temperature according to the target number temperature signal, and temperature compensation module, by initial displacement value and penalty coefficient addition, obtains the displacement of targets value.
The present invention also can comprise the step that a processing unit is communicated by letter with host computer, and processing unit, according to the operational order of host computer, is sent to host computer by the displacement of targets value by communication bus.
Intelligent differential transformer-type sound state displacement transducer of the present invention can work alone, and independently completes collection, calculating and the output of shift value; Simultaneously, Intelligent differential transformer-type sound state displacement transducer also can be connected with host computer by communication bus, host computer is by the described Intelligent differential transformer-type sound of numbering addressing state displacement transducer, realize exchanges data and processing easily, include numbering in the packet that Intelligent differential transformer-type sound state displacement transducer sends, be convenient to host computer identification and process.
The control that processor of the present invention can break away from host computer works alone, and completes measurement and the Processing tasks of certain autonomous time point static object shift value according to its internal processes; Perhaps receive the time point operational order from host computer, gather the static object shift value of this time point and feed back to host computer.
The control that processor of the present invention can break away from host computer works alone, and completes measurement and the Processing tasks of dynamic object shift value in certain autonomous time period according to its internal processes; Perhaps receive the operational order from the host computer time period, read survey frequency, start time and concluding time information, complete the measurement of the dynamic object shift value in this time period and feed back to host computer.
The invention has the beneficial effects as follows:
(1) direct export target shift value (mm of unit etc.), without being processed and calculate in backstage, reduced the workload on backstage.
(2) secondary coil divides the echelon coiling to end face, and at armature, toward end face while moving, the electromotive force stable output of generation, improved the linear precision of differential transformer.
(3) environment temperature that temperature measurement unit records it exports processing unit to, and processing unit carries out temperature compensation according to the temperature compensation coefficient of storing in its storage unit to the shift value that calculates gained, has further improved the measuring accuracy of displacement transducer.
(4) cell stores the device numbering of transmitter, host computer is by the described Intelligent differential transformer-type sound of numbering addressing state displacement transducer, realize exchanges data and processing easily, include numbering in the packet that Intelligent differential transformer-type sound state displacement transducer sends, be convenient to host computer identification and process.
(5) transmitter can break away from the control of host computer, as independent component, independently completes measuring and processing of task according to its internal processes.
The accompanying drawing explanation
Fig. 1 is traditional differential transformer structural representation;
Fig. 2 is differential transformer structural representation of the present invention;
Fig. 3 is structural representation block scheme of the present invention;
In figure, 1-primary coil, 2-secondary coil a, 3-secondary coil b, 4-coil rack, 5-magnetic conductive shell, 6-connecting link, 7-armature, 8-coil bore, 9-hollow reservoir.
Embodiment
Further describe technical scheme of the present invention below in conjunction with accompanying drawing: as shown in Figure 3, Intelligent differential transformer-type sound state displacement transducer, it comprises voltage/current measuring unit, temperature measurement unit, processing unit and storage unit, and voltage/current measuring unit, temperature measurement unit and storage unit are connected with processing unit respectively.The voltage/current measuring unit comprises differential transformer and voltage/current processing module, and the output of differential transformer is connected with the voltage/current processing module, and the output of voltage/current processing module is connected with processing unit; The voltage/current processing module comprises a circuit for signal conditioning and an analog to digital converter, and the output of differential transformer is connected with circuit for signal conditioning, and the output of circuit for signal conditioning is connected with analog to digital converter, and the output of analog to digital converter is connected with processing unit; Circuit for signal conditioning comprises mu balanced circuit, sine-wave generator, detuner and amplifier.Temperature measurement unit comprises a temperature sensor and an analog to digital converter, and the output of temperature sensor is connected with analog to digital converter, and the output of analog to digital converter is connected with processing unit.Processing unit comprises processor and shift value computing module, temperature compensation module and numbering identification module, and processor comprises microprocessor or field programmable gate array PFGA.As shown in Figure 2, described differential transformer comprises primary coil 1, secondary coil a2, secondary coil b3, coil rack 4, magnetic conductive shell 5, connecting link 6 and is located at the armature 7 on connecting link top, and armature 7 is ingot iron armature, ferrite armature or permalloy armature; Coil rack 4 is provided with coil bore 8 near a side of magnetic conductive shell 5, the opposite side of coil rack 4 surrounds hollow reservoir 9, primary coil 1 is wrapped in the side of coil bore 8 near coil rack 4, secondary coil a2 and secondary coil b3 symmetry are wrapped in the side of coil bore 8 near magnetic conductive shell 5, the cross section of secondary coil a2 and secondary coil b3 is stepped appearance, secondary coil a2 and secondary coil b3 press the coiling of incremental manner horizontal symmetrical with the center line of coil bore 8 respectively to two ends, connecting link 6 and armature 7 are positioned at hollow reservoir 9; Storage unit at least stores device numbering, calibration line property coefficient and temperature compensation coefficient.
The processing unit of Intelligent differential transformer-type sound state displacement transducer can also be connected with host computer by communication bus, and for completing and the communicating by letter of host computer, communication bus comprises RS-485 bus or CAN bus.
The displacement measurement method of Intelligent differential transformer-type sound state displacement transducer, it comprises the following steps:
(1) drive displacement is conveyed to armature 7 by connecting link 6 by displacement, and armature 7 is in hollow reservoir 9 interior left and right translation, makes between the electromotive force of secondary coil a2 and secondary coil b3 and produces difference;
Electromotive Difference Of Potential between (2) two secondary coils exports circuit for signal conditioning to, obtains the DC voltage/current value after regulating, then is converted to the target number voltage/current signals and transfers to processing unit through analog to digital converter;
(3) the real-time ambient temperature value of temperature sensor sensing, be converted to the target number temperature signal and transfer to processing unit by analog to digital converter;
(4) the calibration line property coefficient of storing in the processor reading cells, the shift value computing module multiplies each other target number voltage/current signals and calibration line property coefficient, obtains the initial displacement value;
(5) processor is read the penalty coefficient at this temperature according to the target number temperature signal, and temperature compensation module, by initial displacement value and penalty coefficient addition, obtains the displacement of targets value.
Displacement measurement method also can comprise the step that a processing unit is communicated by letter with host computer, and processing unit, according to the operational order of host computer, is sent to host computer by the displacement of targets value by communication bus.
Intelligent differential transformer-type sound state displacement transducer can work alone, and independently completes collection, calculating and the output of shift value; Simultaneously, Intelligent differential transformer-type sound state displacement transducer also can be connected with host computer by communication bus, host computer is by the described Intelligent differential transformer-type sound of numbering addressing state displacement transducer, realize exchanges data and processing easily, include numbering in the packet that Intelligent differential transformer-type sound state displacement transducer sends, be convenient to host computer identification and process.
The control that processor can break away from host computer works alone, and completes measurement and the Processing tasks of certain autonomous time point static object shift value according to its internal processes; Perhaps receive the time point operational order from host computer, gather the static object shift value of this time point and feed back to host computer.The control that processor can break away from host computer works alone, and completes measurement and the Processing tasks of dynamic object shift value in certain autonomous time period according to its internal processes; Perhaps receive the operational order from the host computer time period, read survey frequency, start time and concluding time information, complete the measurement of the dynamic object shift value in this time period and feed back to host computer.
Sound state displacement transducer take by existing module integrated becoming the Intelligent overall that processing unit is core, and the control that can break away from host computer works independently, and completes the task of some measurement and processing according to its internal processes; Also can communicate by communication bus and host computer, carry out the measurement of different time points or time period according to the instruction of host computer, after the compensation of calibration line property coefficient and temperature compensation coefficient, final high precision displacement of targets value is sent to host computer after collection, and then realize the measurement of sound state.
Claims (7)
1. Intelligent differential transformer-type sound state displacement transducer is measured the method for displacement, it is characterized in that: described Intelligent differential transformer-type sound state displacement transducer comprises voltage/current measuring unit, temperature measurement unit, processing unit and storage unit, and voltage/current measuring unit, temperature measurement unit and storage unit are connected with processing unit respectively, the voltage/current measuring unit comprises differential transformer and voltage/current processing module, and the output of differential transformer is connected with the voltage/current processing module, and the output of voltage/current processing module is connected with processing unit, temperature measurement unit comprises a temperature sensor and an analog to digital converter, and the output of temperature sensor is connected with analog to digital converter, and the output of analog to digital converter is connected with processing unit, processing unit comprises processor and shift value computing module, temperature compensation module and numbering identification module, described differential transformer comprises primary coil (1), secondary coil a(2), secondary coil b(3), coil rack (4), magnetic conductive shell (5), connecting link (6) and be located at the armature (7) on connecting link top, coil rack (4) is provided with coil bore (8) near a side of magnetic conductive shell (5), the opposite side of coil rack (4) surrounds hollow reservoir (9), primary coil (1) is wrapped in the side of coil bore (8) near coil rack (4), secondary coil a(2) and secondary coil b(3) symmetry is wrapped in coil bore (8) near a side of magnetic conductive shell (5), secondary coil a(2) and secondary coil b(3) cross section be stepped appearance, secondary coil a(2) and secondary coil b(3) respectively with the center line of coil bore (8) to two ends by the coiling of incremental manner horizontal symmetrical, connecting link (6) and armature (7) are positioned at hollow reservoir (9), storage unit at least stores device numbering, calibration line property coefficient and temperature compensation coefficient,
The method of described measurement displacement comprises the following steps:
(1) drive displacement is conveyed to armature (7) by connecting link (6) by displacement, and armature (7) is in hollow reservoir (9)
The translation of interior left and right, make secondary coil a(2) and secondary coil b(3) electromotive force between produce difference;
Electromotive Difference Of Potential between (2) two secondary coils exports circuit for signal conditioning to, obtains the DC voltage/current value after regulating, then is converted to the target number voltage/current signals and transfers to processing unit through analog to digital converter;
(3) the real-time ambient temperature value of temperature sensor sensing, be converted to the target number temperature signal and transfer to processing unit by analog to digital converter;
(4) the calibration line property coefficient of storing in the processor reading cells, the shift value computing module multiplies each other target number voltage/current signals and calibration line property coefficient, obtains the initial displacement value;
(5) processor is read the penalty coefficient at this temperature according to the target number temperature signal, and temperature compensation module, by initial displacement value and penalty coefficient addition, obtains the displacement of targets value.
2. Intelligent differential transformer-type sound state displacement transducer according to claim 1 is measured the method for displacement, it is characterized in that: described processing unit also is connected with host computer by RS-485 bus or CAN bus.
3. Intelligent differential transformer-type sound state displacement transducer according to claim 1 is measured the method for displacement, and it is characterized in that: described processor comprises microprocessor or field programmable gate array PFGA.
4. Intelligent differential transformer-type sound state displacement transducer according to claim 1 is measured the method for displacement, it is characterized in that: it also comprises the step that a processing unit is communicated by letter with host computer, processing unit, according to the operational order of host computer, is sent to host computer by the displacement of targets value by communication bus.
5. Intelligent differential transformer-type sound state displacement transducer according to claim 1 is measured the method for displacement, it is characterized in that: when described Intelligent differential transformer-type sound state displacement transducer works alone, independently complete collection, calculating and the output of shift value; Simultaneously, Intelligent differential transformer-type sound state displacement transducer is connected with host computer by communication bus, host computer is by the described Intelligent differential transformer-type sound of numbering addressing state displacement transducer, realize exchanges data and processing easily, include numbering in the packet that Intelligent differential transformer-type sound state displacement transducer sends, be convenient to host computer identification and process.
6. Intelligent differential transformer-type sound state displacement transducer according to claim 1 is measured the method for displacement, it is characterized in that: when the control of described processor disengaging host computer works alone, complete measurement and the Processing tasks of certain autonomous time point static object shift value according to its internal processes; Perhaps receive the time point operational order from host computer, gather the static object shift value of this time point and feed back to host computer.
7. Intelligent differential transformer-type sound state displacement transducer according to claim 1 is measured the method for displacement, it is characterized in that: when the control of described processor disengaging host computer works alone, complete measurement and the Processing tasks of dynamic object shift value in certain autonomous time period according to its internal processes; Perhaps receive the operational order from the host computer time period, read survey frequency, start time and concluding time information, complete the measurement of the dynamic object shift value in this time period and feed back to host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210017412 CN102589404B (en) | 2012-01-19 | 2012-01-19 | Method for measuring displacement by using intelligent differential transformer-type static and dynamic displacement transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210017412 CN102589404B (en) | 2012-01-19 | 2012-01-19 | Method for measuring displacement by using intelligent differential transformer-type static and dynamic displacement transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102589404A CN102589404A (en) | 2012-07-18 |
| CN102589404B true CN102589404B (en) | 2013-12-25 |
Family
ID=46478401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210017412 Active CN102589404B (en) | 2012-01-19 | 2012-01-19 | Method for measuring displacement by using intelligent differential transformer-type static and dynamic displacement transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102589404B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871527A (en) * | 2012-12-14 | 2014-06-18 | 中国核动力研究设计院 | Temperature compensating method used for rod position detector |
| CN107910171B (en) * | 2013-09-17 | 2020-03-20 | 精量电子（深圳）有限公司 | Linear variable differential transformer |
| CN113188432B (en) * | 2021-06-25 | 2021-09-14 | 西安联飞智能装备研究院有限责任公司 | LVDT sensor and winding method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2248058C1 (en) * | 2003-07-07 | 2005-03-10 | Открытое ационерное общество "АО Спецэлектрод" | Adjustable transformer (alternatives) |
| CN202420424U (en) * | 2012-01-19 | 2012-09-05 | 四川金码科技有限公司 | Intelligent differential transformer type dynamic and static displacement transmitter |
-
2012
- 2012-01-19 CN CN 201210017412 patent/CN102589404B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102589404A (en) | 2012-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104139322B (en) | A kind of condenser type intelligence handle of a knife system for the detection of four-dimensional cutting power | |
| CN200986484Y (en) | Magnetic field sensor | |
| CN102478033A (en) | Measuring and controlling system of electro-hydraulic servo valve | |
| CN102589404B (en) | Method for measuring displacement by using intelligent differential transformer-type static and dynamic displacement transducer | |
| CN101556138A (en) | Time-grating straight-line displacement sensor | |
| CN103105479A (en) | Full-automatic collecting liquid-plastic limit combined measuring system | |
| CN109062199A (en) | Magnetic navigation sensor system and its control method | |
| CN202420424U (en) | Intelligent differential transformer type dynamic and static displacement transmitter | |
| CN104835326A (en) | Vehicle detector based on anisotropy magnetic resistance sensor array | |
| CN102393540B (en) | Magnetic suspension rainfall intensity recorder | |
| CN209659349U (en) | A kind of Internet of Things weighing sensor and system | |
| CN205210163U (en) | Huge magnetoresistive effect current sensor | |
| CN102841278B (en) | Automatic measuring method for RFID (radio frequency identification) read range of logistics transportation line | |
| CN200986470Y (en) | Temperature sensor | |
| CN200989917Y (en) | Voltage sensor | |
| CN101825428B (en) | Gap sensor calibration system of magnetic-levitation train | |
| CN201311269Y (en) | Sensor for measuring linear displacement | |
| CN104655236A (en) | Liquid level measuring system | |
| CN205209534U (en) | Distribution transformer network management system based on zigbee and RFID technique | |
| CN209044375U (en) | Engineering machinery assemble production line moment measuring device | |
| CN203069578U (en) | Full-automatic collection liquid-plastic limit combined determination system | |
| CN203518936U (en) | Reading head of displacement sensor | |
| CN203011610U (en) | Novel digital altimeter based on AVR one-chip microcomputer | |
| CN110940440A (en) | Giant magnetostrictive pressure measuring device and pressure measuring method | |
| CN206353049U (en) | A kind of intelligent electronic-scale system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |