CN102436183B - Atmospheric parameter simulator - Google Patents
Atmospheric parameter simulator Download PDFInfo
- Publication number
- CN102436183B CN102436183B CN 201110290697 CN201110290697A CN102436183B CN 102436183 B CN102436183 B CN 102436183B CN 201110290697 CN201110290697 CN 201110290697 CN 201110290697 A CN201110290697 A CN 201110290697A CN 102436183 B CN102436183 B CN 102436183B
- Authority
- CN
- China
- Prior art keywords
- pressure
- control module
- static pressure
- module
- stagnation
- 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
Abstract
The invention relates to the technical field of air pressure test and simulation, in particular to an atmospheric parameter simulator. The invention aims to solve the problems of a pressure control mode based on a proportional valve, such as low response speed, high processing difficulty and the like. In order to fulfill the aim, the atmospheric parameter simulator comprises a main control module, a liquid crystal display module, a keyboard control module, a static pressure and total pressure control module and an air channel module, wherein the main control module is used for performing overriding control on the atmospheric parameter simulator; the liquid crystal display module is used for displaying system parameters and output results; the keyboard control module is used for inputting an operating instruction into a system through a keyboard so as to perform control; the static pressure and total pressure control module is used for controlling and measuring atmospheric parameters of a static pressure channel and a total pressure channel; and the air channel module is used for actually controlling and measuring the atmospheric parameters according to the instruction of the static pressure and total pressure control module. The atmospheric parameter simulator has the advantages of simple structure, low cost, high response speed and the like.
Description
Technical field
The present invention relates to air pressure test and analogue technique field, be specifically related to a kind of atmospheric parameter simulator.
Background technology
The atmospheric parameter simulator can provide the simulation such as atmospheric parameters such as static pressure, stagnation pressure, Mach number, air speeds for the aircraft of space flight and aviation field, especially space industry is higher to the requirement of atmospheric parameter simulator, and it requires high precision air pressure control, response speed faster.Existing atmospheric parameter simulator mainly is based on the pneumatic control system of pressure servo valve/proportioning valve, and the advantage of this pneumatic control system is that apparatus structure is simple relatively, has control accuracy preferably; But the processing that corresponding shortcoming is pressure servo valve is difficulty comparatively, and cost is very high, and is difficult to realize the control of elevated pressures, and response speed is slower.
Summary of the invention
The present invention is intended to solve the problems of the technologies described above, and namely overcomes limitation such as, processing difficulties slow based on the pressure controling mode response speed of pressure servo valve/proportioning valve.For this purpose, the invention provides a kind of atmospheric parameter simulator, this atmospheric parameter simulator comprises: the main control module, and it is used for described atmospheric parameter simulator is carried out upper control; LCD MODULE, it is used for systematic parameter and output result's demonstration; The Keyboard Control module, it is used for instructing in order to control to system's input operation by keyboard; Static pressure and stagnation pressure control module, it is used for the atmospheric parameter of static pressure passage and total pressure passageway is controlled and measured; And gas path module, control and the measurement of the actual execution of its instruction according to described static pressure and stagnation pressure control module atmospheric parameter; This atmospheric parameter simulator is characterised in that described gas path module utilizes high-speed switch electromagnetic valve to carry out the control of atmospheric parameter.
In a preferred embodiment, described gas path module comprises source of the gas, baroceptor, solenoid valve and gas channels, and described gas channels is used for the connection between described source of the gas, baroceptor, the solenoid valve.
In preferred embodiment, described source of the gas comprises forcing pump and vacuum pump, described baroceptor comprises for the static pressure of static pressure passage control sensor and static pressure master reference and the stagnation pressure master reference and the differential pressure control sensor that are used for total pressure passageway, and described solenoid valve comprises for first and second high-speed switch electromagnetic valves of static pressure passage and third and fourth high-speed switch electromagnetic valve that is used for total pressure passageway.
In preferred embodiment, described main control module comprise with the interface of described LCD MODULE, with the interface of described Keyboard Control module, with interface, IEEE488 interface, RS232 serial ports and the printer port of described static pressure and stagnation pressure control module; And the upper control of being carried out by described main control module comprises following: Keyboard Control, liquid crystal display, atmospheric parameter conversion, with communicating by letter of carrying out of static pressure and stagnation pressure control module and control, state demonstration, System self-test function, protection (ground connection etc.) function, leak gas measuring ability and fault diagnosis functions.
In preferred embodiment, described static pressure and stagnation pressure control module are the circuit topworkies between described main control module and the described gas path module, the operation that described static pressure and stagnation pressure control module are carried out comprises following: and communicate between the described main control module, being described main control module sends the result of control command, data processing operation to described static pressure and stagnation pressure control module, and described static pressure and stagnation pressure control module send the status monitoring signal to described main control module; Pressure survey, namely master reference sends to the CPU of described static pressure and stagnation pressure control module with pressure measuring value, and the result after the CPU of described static pressure and stagnation pressure control module will convert sends to the CPU of described main control module; Pressure control, namely described static pressure and stagnation pressure control module receive the pressure target value that described main control module is set, and by carrying out pressure closed loop control, handle described gas path module and produce the required pressure environment.
In further preferred implementation, described LCD MODULE be used for showing static pressure, stagnation pressure, dynamic pressure, static pressure rate of change, stagnation pressure rate of change, dynamic pressure rate of change, highly, Mach number, speed, altitude rate, percentage speed variation.
In further preferred implementation, described Keyboard Control module is used for state change and parameter input, and comprises parameter options button, function selecting key and parameter enter key.
The present invention is according to the every function under the field condition of pressure altimeter, Machmeter, airspeed indicator on aircraft flight track material object and hardware-in-the-loop simulation and the aircraft and the requirement of performance technologies index test, Sealing Technology and the atmospheric parameter model conversion technology of the technology of adjusting of abundant fusion high precision air pressure control technology, PID closed-loop control parameter, high-speed electromagnetic valve driver circuit designing technique, air-channel system, realized atmospheric parameter simulation and measured to have that analog functuion is strong, adaptability is strong, characteristics such as easy for operation, highly versatile.The present invention satisfies every function and the requirement of performance technologies index test under the field condition of pressure altimeter, Machmeter, airspeed indicator on aircraft flight track material object and hardware-in-the-loop simulation and the aircraft.
In brief, the control pressurer system based on high-speed switch electromagnetic valve according to the present invention has simple in structure, with low cost, reliable operation, is convenient to advantages such as computer control, the fine setting that can realize gas circuit and micro-control and response speed be fast.
Description of drawings
Describe preferred implementation of the present invention in conjunction with the drawings, those skilled in the art can understand the present invention more fully, in the accompanying drawing:
Fig. 1 is the theory diagram according to atmospheric parameter simulator of the present invention;
Fig. 2 is the theory diagram according to main control module of the present invention;
Fig. 3 is the theory diagram according to static pressure of the present invention and stagnation pressure control module;
Fig. 4 is the theory diagram according to gas path module of the present invention.
Embodiment
Description to preferred implementation of the present invention only is exemplary in essence below, is not to be intended to limit invention, its application, or uses.Should be noted that; although this preferred implementation has disclosed various concrete structure of the present invention and details; but those skilled in the art are understood that easily; protection scope of the present invention is not limited to these structures and details; under the situation that does not depart from ultimate principle of the present invention; those skilled in the art can make modification or be equal to replacement these structures and details, and the embodiment after revising or replacing also will fall within protection scope of the present invention.
As using among the application, term " module " means following: special IC (ASIC), electronic circuit, combinational logic circuit, field programmable gate array (FPGA), carry out coding processor (shared, special-purpose or in groups), other suitable parts of described function are provided; The perhaps combination of above-mentioned some or all parts.Term " module " can comprise storer (shared, special-purpose or in groups), the coding that described memory stores is carried out by processor.
At first consult Fig. 1, atmospheric parameter simulator according to the present invention comprises main control module, LCD MODULE, Keyboard Control module, static pressure and stagnation pressure control module and gas path module.The main control module is used for carrying out upper control, and the operation of its execution includes but not limited to following: keyboard response control, data output show, atmospheric parameter is changed, communicated by letter so that the executive system centralized control with static pressure and stagnation pressure control module.Particularly, the main control module sends the result of control command, data processing operation etc. to static pressure and stagnation pressure control module, and static pressure and stagnation pressure control module send various status monitoring signals to the main control module.Only as example, the human-computer interaction interface of the apparent control interface of main control module under the WINCE interface, developing, finishing the setting of atmospheric parameter simulator parameter and state shows, pass through serial communication between main control module and static pressure and the stagnation pressure control module, agreement is RS232, the core of static pressure and stagnation pressure control module is singlechip chip and fpga chip, sends the status monitoring signal to the main control module.
LCD MODULE is used for systematic parameter and output result's demonstration.The Keyboard Control module is used for instructing in order to control to system's input operation by keyboard.
Static pressure and stagnation pressure control module are mainly used in the parameters such as air pressure of static pressure passage and total pressure passageway are controlled and measured, the concrete operations of its execution include but not limited to following: communicate with the main control module, as mentioned above, the main control module sends the result of control command, data processing operation to static pressure and stagnation pressure control module, and static pressure and stagnation pressure control module send the status monitoring signal to the main control module; Carry out pressure survey, namely master reference sends to the CPU of static pressure and stagnation pressure control module with pressure measuring value, and the result after the CPU of static pressure and stagnation pressure control module will convert sends to the CPU of main control module; Carry out pressure control, namely receive the pressure target value that the main control module is set, by carrying out pressure closed loop control, handle air-channel system and produce the required pressure environment.Herein, although should be pointed out that among Fig. 1 static pressure control module and stagnation pressure control module are illustrated as standalone module, under the situation that does not depart from principle of the present invention, static pressure control module and stagnation pressure control module can be integrated in the units/modules.
In addition, gas path module is be used to the pneumatic actuator that carries out the isoparametric control of air pressure and measurement, and its instruction according to static pressure and stagnation pressure control module produces required pressure environment.
Consult Fig. 2 now, as mentioned above, the main control module mainly realizes the parsing of man-machine interface order and processing, communicates with static pressure and stagnation pressure control module, and finishes the conversion of atmospheric parameter.As shown in Figure 2, main control module comprises: with the interface of LCD MODULE; Interface with the Keyboard Control module; Interface with the static pressure control module; Interface with the stagnation pressure control module; The IEEE488 interface; RS232 serial ports and printer port etc.
The main control module mainly realizes following function: Keyboard Control; Liquid crystal display; From pressure to the height, the isoparametric conversion of Mach number; And communicate and control between static pressure and the stagnation pressure control module; State shows that for example the duty of solenoid valve shows; The System self-test function; Protection (ground connection etc.) function; The gas leakage measuring ability; Fault diagnosis functions etc.
LCD MODULE be used for to show duty, the parameter of full machine, namely show static pressure, stagnation pressure, dynamic pressure, static pressure rate of change, stagnation pressure rate of change, dynamic pressure rate of change, highly, Mach number, speed, altitude rate, percentage speed variation etc.
The Keyboard Control module is used for by keyboard system being carried out control operation, and the state that is mainly used in changes and the parameter input, and it comprises parameter options button, function selecting key and parameter enter key etc.
Next consult Fig. 3, there is shown static pressure and stagnation pressure control module, described module is the circuit topworks between main control module and the gas path module, and it mainly realizes following function: communicate with the main control module; Carry out pressure survey; Carry out pressure control.After static pressure and stagnation pressure control module received target pressure value from the main control module, the control sensor participated in loop control earlier, and it is with measuring voltage value V
cTarget voltage values V with the CPU generation
rCompare its difference V
oBe admitted to the PID control loop, the PID departure and the triangular-wave generator that produce compare, and comparative result is the pwm signal that drives high-speed electromagnetic valve, and this signal controlling high-speed electromagnetic valve charges and discharge gas.When controlled pressure during near desired value, master reference participates in loop control.In this closed control circuit, key link is control, PID loop design and the PWM control of system accuracy and response time.
Consult Fig. 4 at last, there is shown gas path module, this gas path module is the pneumatic actuator of controlling and measuring for to parameters such as air pressure, and it comprises: source of the gas, for example forcing pump and vacuum pump; Baroceptor, for example static pressure control sensor, static pressure master reference, stagnation pressure master reference and differential pressure control sensor; Solenoid valve, for example high-speed switch electromagnetic valve 1-4; And gas channels, for example gas channels between above-mentioned each parts.Only as example, the top pressure of pressure gas source-be forcing pump is 0.5Mpa (absolute pressure), and the vacuum tightness of vacuum source-be vacuum pump is 2.0kpa (absolute pressure); Solenoid valve is direct-acting electromagnetic valve, and working pressure range is 2.0kpa-0.5Mpa (absolute pressure); Baroceptor requires: precision 0.01%FS, be output as digital quantity, and carry temperature compensation, air pressure range 3.5Kpa-135Kpa (static pressure), 3.5Kpa-350Kpa (stagnation pressure).
Specific to the static pressure passage, when working in control model following time, high-speed switch electromagnetic valve 1, high-speed switch electromagnetic valve 2 are used for the gas control system that charges and discharge of static pressure passage, and static pressure control sensor and static pressure master reference are measured air-capacitor 1 (P
s) force value, measurement result is admitted to the PID control loop, produce pwm signal then, described pwm signal control high-speed switch electromagnetic valve 1 and 2 pairs of air-capacitors 1 are carried out dynamic pressure control, when being about near desired value, the pressure controlling value adopt the control sensor to reach the quick response of gas circuit, enter gas circuit afterwards when stablizing, with master reference work to obtain to satisfy the control accuracy of index request.Similarly, when working in control model following time, high-speed switch electromagnetic valve 3, high-speed switch electromagnetic valve 4 are used for the gas control system that charges and discharge of total pressure passageway, and total pressure-controlled sensor and stagnation pressure master reference are measured air-capacitor 2 (P
t) force value, measurement result is admitted to the PID control loop, produces pwm signal then, described pwm signal control high-speed switch electromagnetic valve 3 and 4 pairs of air-capacitors 2 are carried out dynamic pressure control.
Although described technical scheme of the present invention with reference to preferred implementation; but those skilled in the art are understood that easily; protection scope of the present invention is not limited to these embodiments; under the situation that does not depart from ultimate principle of the present invention; can split, make up and change described embodiment and concrete technical characterictic wherein, the technical scheme after fractionation, combination and the change will fall within protection scope of the present invention.
Claims (5)
1. atmospheric parameter simulator comprises:
The main control module, it is used for described atmospheric parameter simulator is carried out upper control;
LCD MODULE, it is used for systematic parameter and output result's demonstration;
The Keyboard Control module, it is used for instructing in order to control to system's input operation by keyboard;
Static pressure and stagnation pressure control module, it is used for the atmospheric parameter of static pressure passage and total pressure passageway is controlled and measured; And
Gas path module, control and the measurement of the actual execution of its instruction according to described static pressure and stagnation pressure control module atmospheric parameter;
It is characterized in that described gas path module utilizes high-speed switch electromagnetic valve to carry out the control of atmospheric parameter,
Wherein, described gas path module comprises source of the gas, baroceptor, solenoid valve and gas channels, and described gas channels is used for the connection between described source of the gas, baroceptor, the solenoid valve, and
Wherein, described source of the gas comprises forcing pump and vacuum pump, described baroceptor comprises for the static pressure of static pressure passage control sensor and static pressure master reference and the stagnation pressure master reference and the differential pressure control sensor that are used for total pressure passageway, and described solenoid valve comprises for first and second high-speed switch electromagnetic valves of static pressure passage and third and fourth high-speed switch electromagnetic valve that is used for total pressure passageway.
2. atmospheric parameter simulator as claimed in claim 1, it is characterized in that, described main control module comprise with the interface of described LCD MODULE, with the interface of described Keyboard Control module, with interface, IEEE488 interface, RS232 serial ports and the printer port of described static pressure and stagnation pressure control module; And the upper control of being carried out by described main control module comprises following: Keyboard Control, liquid crystal display, atmospheric parameter conversion, with communicating by letter and control, state demonstration, System self-test function, defencive function, gas leakage measuring ability and fault diagnosis functions that static pressure and stagnation pressure control module are carried out.
3. atmospheric parameter simulator as claimed in claim 2, it is characterized in that, described static pressure and stagnation pressure control module are the circuit topworkies between described main control module and the described gas path module, the operation that described static pressure and stagnation pressure control module are carried out comprises following: and communicate between the described main control module, being described main control module sends the result of control command, data processing operation to described static pressure and stagnation pressure control module, and described static pressure and stagnation pressure control module send the status monitoring signal to described main control module; Pressure survey, namely master reference sends to the CPU of described static pressure and stagnation pressure control module with pressure measuring value, and the result after the CPU of described static pressure and stagnation pressure control module will convert sends to the CPU of described main control module; Pressure control, namely described static pressure and stagnation pressure control module receive the pressure target value that described main control module is set, and by carrying out pressure closed loop control, handle described gas path module and produce the required pressure environment.
4. as each described atmospheric parameter simulator in the claim 1 to 3, it is characterized in that, described LCD MODULE be used for to show static pressure, stagnation pressure, dynamic pressure, static pressure rate of change, stagnation pressure rate of change, dynamic pressure rate of change, highly, Mach number, speed, altitude rate, percentage speed variation.
5. as each described atmospheric parameter simulator in the claim 1 to 3, it is characterized in that described Keyboard Control module is used for state change and parameter input, and comprises parameter options button, function selecting key and parameter enter key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110290697 CN102436183B (en) | 2011-09-29 | 2011-09-29 | Atmospheric parameter simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110290697 CN102436183B (en) | 2011-09-29 | 2011-09-29 | Atmospheric parameter simulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102436183A CN102436183A (en) | 2012-05-02 |
| CN102436183B true CN102436183B (en) | 2013-09-25 |
Family
ID=45984287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110290697 Active CN102436183B (en) | 2011-09-29 | 2011-09-29 | Atmospheric parameter simulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102436183B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645644A (en) * | 2013-11-28 | 2014-03-19 | 江西洪都航空工业集团有限责任公司 | Dynamic and static pressure correction method of altitude air pressure simulator in simulation |
| CN105547346A (en) * | 2016-02-18 | 2016-05-04 | 江西洪都航空工业集团有限责任公司 | Pressure altitude simulator |
| CN107525521B (en) * | 2017-09-07 | 2023-09-19 | 国营芜湖机械厂 | Atmospheric data excitation device |
| CN107883980A (en) * | 2017-10-27 | 2018-04-06 | 北京机电工程研究所 | Pressure altimeter base level dynamic testing method |
| CN108106810B (en) * | 2017-12-19 | 2019-07-05 | 北京航空航天大学 | A kind of flight atmospheric parameter calibration experiments device |
| CN110531639A (en) * | 2019-09-10 | 2019-12-03 | 象限空间（天津）科技有限公司 | A kind of pressure simulation device for low flyer |
| CN111608839A (en) * | 2020-06-16 | 2020-09-01 | 成都航利航空科技有限责任公司 | System and method for plateau starting of engine |
| CN112525152B (en) * | 2020-12-14 | 2022-12-27 | 北京空间机电研究所 | Quick response high accuracy atmospheric pressure altitude analog system |
| CN113867433A (en) * | 2021-11-09 | 2021-12-31 | 中国航空工业集团公司北京长城计量测试技术研究所 | Double-channel atmospheric parameter pressure control gas circuit and adjusting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2715118Y (en) * | 2004-06-30 | 2005-08-03 | 上海理工大学 | Split-type combined dynamic tube |
| CN101256417A (en) * | 2008-02-25 | 2008-09-03 | 周德海 | Proportional valve pair accurate atmosphere controller |
| CN201177766Y (en) * | 2008-04-24 | 2009-01-07 | 上海科系思工业设备有限公司 | Electronic pressure controller based on PID control algorithm |
| CN101963147A (en) * | 2010-08-27 | 2011-02-02 | 深圳市普博科技有限公司 | Control panel and corresponding devices of airflow generating equipment |
| CN201788084U (en) * | 2010-08-19 | 2011-04-06 | 杭州沃镭科技有限公司 | Pneumatic electromagnetic valve comprehensive performance detecting device based on PC control |
-
2011
- 2011-09-29 CN CN 201110290697 patent/CN102436183B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2715118Y (en) * | 2004-06-30 | 2005-08-03 | 上海理工大学 | Split-type combined dynamic tube |
| CN101256417A (en) * | 2008-02-25 | 2008-09-03 | 周德海 | Proportional valve pair accurate atmosphere controller |
| CN201177766Y (en) * | 2008-04-24 | 2009-01-07 | 上海科系思工业设备有限公司 | Electronic pressure controller based on PID control algorithm |
| CN201788084U (en) * | 2010-08-19 | 2011-04-06 | 杭州沃镭科技有限公司 | Pneumatic electromagnetic valve comprehensive performance detecting device based on PC control |
| CN101963147A (en) * | 2010-08-27 | 2011-02-02 | 深圳市普博科技有限公司 | Control panel and corresponding devices of airflow generating equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102436183A (en) | 2012-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102436183B (en) | Atmospheric parameter simulator | |
| CN102385397A (en) | High-precision pressure control system based on high-speed solenoid valve | |
| CN101544281A (en) | Semi-physical real-time simulation system of airplane reverse thrust hydraulic unit | |
| US10545464B2 (en) | Control system having variable gain feed forward (VGFF) control | |
| CN105649782A (en) | Micro/small jet engine fuel control system and control method | |
| CN105975692A (en) | Model-based dynamic analysis method for extruded two-component liquid power system | |
| CN104749967A (en) | Quick prototype architecture of aero-engine control unit | |
| CN102521461A (en) | Simulation modeling method of electro-hydraulic servo valve based on Modelica language | |
| CN204495404U (en) | A kind of Atmosphere Data Testing System | |
| CN106777842A (en) | For the method for the thermal machine such as aero-engine system modeling and simulation analysis | |
| CN103021252B (en) | A kind of real-time negative pressure simulation device | |
| CN105302173B (en) | A kind of barometric pressure servo-control system for high-altitude vehicle | |
| CN103645644A (en) | Dynamic and static pressure correction method of altitude air pressure simulator in simulation | |
| CN111008118A (en) | Servo system energy consumption evaluation system and evaluation method | |
| CN108106810B (en) | A kind of flight atmospheric parameter calibration experiments device | |
| CN102840972A (en) | Hydraulic loading device for mechanical part test table | |
| CN202648919U (en) | Anti-skid valve test device | |
| CN107478433A (en) | Associative form HIL test systems and its control method | |
| CN107525521B (en) | Atmospheric data excitation device | |
| CN109508051A (en) | Dynamic negative-pressure servo-control system and method based on symmetrical cylinder | |
| CN113219858B (en) | Semi-physical simulation verification platform for electric hydrostatic actuator | |
| CN108278325B (en) | Large-scale high-precision passive air-floating vibration isolation platform integrated control cabinet | |
| CN202545429U (en) | Segmental pressure release control system for vulcanizing machine | |
| CN215932907U (en) | Simulation training system for airplane air data instrument | |
| CN100501609C (en) | Concrete additive complex production line control 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 | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yang Shuiwang Inventor after: Li Daisong Inventor after: You Fuchu Inventor after: Huang Yongbo Inventor after: Jiang Feng Inventor before: Yang Shuiwang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YANG SHUIWANG TO: YANG SHUIWANG LI DAISONG YOU FUCHU HUANG YONGBO JIANG FENG |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |