CN101949995B - Device for measuring distance of cable fault points - Google Patents
Device for measuring distance of cable fault points Download PDFInfo
- Publication number
- CN101949995B CN101949995B CN2010102704133A CN201010270413A CN101949995B CN 101949995 B CN101949995 B CN 101949995B CN 2010102704133 A CN2010102704133 A CN 2010102704133A CN 201010270413 A CN201010270413 A CN 201010270413A CN 101949995 B CN101949995 B CN 101949995B
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- module
- flip flop
- type flip
- 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
Images
Abstract
The invention discloses a device for measuring distance of cable fault points, comprising five components: a power module, a control module, an impulse generation module, an integral module and a display module, wherein the control module transmits incident signals to the cable by the impulse generation module, the incident signals trigger a D flip flop in the integral module to generate high level to charge an integral circuit; the incident signals are reflected by the fault points to generate reflected signals which return in the same way, the reflected signals trigger the D flip flop to generate low level to stop charging the integral circuit; a sampling circuit in the integral module samples voltage output by the integral circuit and transmits sampling signals to the control module; the control module works out the fault distance on the cable to finish the process of measuring the distance of cable fault points according to the sampling signals. The device of the invention features simple circuit structure, easy debugging and operation, portability, low manufacturing cost and wide application range.
Description
Technical field
The present invention relates to the electronic surveying field, design a kind of cable open circuit fault point distance measuring equipment.
Background technology
At present, the various cables of transmitting electric power are ubiquitous, but because the various cable open circuit faults that reasons such as construction cause also emerge in an endless stream, bring and seriously influence for production, life.
Cable can be thought a kind of transmission line; In order accurately to measure the position of breaking down on the cable, method commonly used at present is to adopt row wave measurement method, and test signal is all sampled; According to transmission line Distribution parameter theory analytic signal, Method of Cable Trouble Point is found range.Adopt this method to have following shortcoming: 1, cost is high; 2, distance-measuring device volume in trouble spot is bigger, and power supply and surrounding enviroment are required height, brings many restrictions to surveying work; 3, device structure is complicated, and is difficult in maintenance; 4, complicated operation.Therefore, it is very necessary that the device that designs a kind of low cost and can fast, conveniently detect the Method of Cable Trouble Point distance seems.
Summary of the invention
The present invention utilizes the propagation property of capable ripple on transmission line, and the distance between launching site and the trouble spot is converted into voltage signal, through measurement and the analysis to voltage signal, realizes the measurement to the trouble spot distance.
A kind of cable fault detecting device is made up of control module, pulse generation module, integration module, display module, power module;
Described control module produces detection signal, receives the sampled signal of integration module output, and sampled signal is handled and calculated, the distance of position to the incident end that obtains breaking down;
Described pulse generation module comprises signal transformation circuit and signal follow circuit, and signal transformation circuit receives the detection signal of control module generation and carries out shaping, and the signal follow circuit improves the carrying load ability of incoming signal and carries out the cable resistance coupling;
Described integration module; Comprise d type flip flop, integrating circuit and sample circuit, the incoming signal after the shaping of d type flip flop received pulse generation module receives reflected signal simultaneously; Incoming signal triggers d type flip flop to begin integrating circuit is charged; Reflected signal triggers d type flip flop and stops the charging to integrating circuit, and sample circuit is to the integrating circuit output voltage sampling after stopping to charge, and the signal after the sampling is delivered to control module;
Display module comprises the charactron display, control module is handled the testing result that obtains be presented on the charactron display;
Power module is for above-mentioned module provides working power.
Described control module adopts the microcontroller chip of inner integrated mould/number conversion function, is digital signal with the sampled signal that receives by analog signal conversion in microcontroller chip inside, carries out relevant treatment again.Described control module is claimed detection signal to pulse generation module input pulse signal.
Described pulse generation module is made up of the signal transformation circuit and the signal follow circuit of series connection; Signal transformation circuit is made up of four not gate G1, G2, G3, G4, diode D1, multi-way switch S1, multichannel resistance Var1 and capacitor C 1; After connecting, two not gate G1, G2 connect the negative electrode of diode D1; The anode of diode D1 is connected with not gate G3, the G4 of two series connection again, and multi-way switch S1 connects with multichannel resistance Var1, is attempted by diode D1 two ends again; Capacitor C 1 one ends connect diode D1 anode, other end ground connection; Signal transformation circuit carries out shaping to detection signal; Change the detection signal pulsewidth to adapt to the cable of different length; The minimum pulse width that can provide pulse when adopting the 12M crystal oscillator like microcontroller chip is 1/12us; This pulsewidth is oversize when measuring short-range cable, therefore must reduce pulsewidth through shaping, and the synchronous signal shaping circuit can reduce incoming signal rising edge, negative edge time.
The signal follow circuit is composed in series by operational amplifier Op1, multi-way switch S2 and multichannel resistance Var2, can improve the incoming signal carrying load ability and carry out the cable resistance coupling.
Integration module; Comprise d type flip flop, integrating circuit and sample circuit; A pin PA1 of d type flip flop zero clearing termination microcontroller chip; The input end D of d type flip flop links to each other with reversed-phase output
, and the in-phase output end Q of d type flip flop connects with multi-way switch S3, multichannel resistance Var3;
Integrating circuit is made up of multi-way switch S3, multichannel resistance Var3, operational amplifier Op2 and capacitor C 2; Wherein connect the inverting input of operational amplifier Op2 after multi-way switch S3 and the multichannel resistance Var3 series connection; The in-phase input end ground connection of operational amplifier Op2, capacitor C 2 are connected between the inverting input and output terminal of operational amplifier Op2.
Be provided with diode D2 between described d type flip flop and the integrating circuit, the electrical leakage quantity of integrating circuit after minimizing stops to charge to integrating circuit, the accuracy of raising integrating circuit output voltage.
Sample circuit comprises that sampling keeps chip and sampling capacitance C3 to form, and sampling keeps the input end of chip to be connected with integrating circuit, and sampling keeps output terminal, the clear terminal of chip to be connected with microcontroller chip.
Incoming signal after the shaping of d type flip flop received pulse generation module; Receive reflected signal simultaneously; Incoming signal triggers d type flip flop to begin integrating circuit is charged; Reflected signal triggers d type flip flop and stops the charging to integrating circuit, and sample circuit is to the integrating circuit output voltage sampling after stopping to charge, and the signal after the sampling is delivered to control module.
After the shaping of the described pulse generation module of incoming signal process, trigger the d type flip flop in the said integration module, d type flip flop output high level charges to integrating circuit.The trouble spot that incoming signal runs on the cable is reflected, and produces the reflected signal that former road, an edge is returned, and reflected signal triggers the d type flip flop in the integration module for the second time, and the d type flip flop output low level stops the charging to integrating circuit.At this moment; Sample circuit in the integration module is delivered to sampled result in the control module integrating circuit output voltage values that control module obtains according to sampling to the sampling of integrating circuit output voltage; Can calculate the Method of Cable Trouble Point distance, and the result is presented on the light-emitting diode display of display module.
Described power module is a joint 12V lead-acid accumulator, and adopts an isolated form DC-DC power supply chip to convert the output voltage of lead-acid accumulator into stable ± 5V DC voltage, for other modules of circuit provide stable operating voltage.
Described pulse generation module signal transformation circuit can be in very large range continuous the pulse width of adjusting detection signal; Said integrating circuit can be in very large range continuous adjusting integration speed; Said pulse module and integration module are applicable to the cable of various features impedance and multiple length range, and the optimization of realization resolution and finding range.
The present invention through 1, multi-way switch S1, regulate the detection signal pulsewidth, to adapt to the cable of different length; 2, multi-way switch S2 regulates matched impedance, and is identical with the characteristic impedance of cable, so that reflected signal at the incident end reflection does not for the second time take place; 3, multi-way switch S3 regulates integration speed, to adapt to different cable length scopes." three adjustings " acting in conjunction makes the present invention can measure the cable of different characteristic impedance, different length scope, and realizes the optimization of resolution and finding range.
The present invention uses is basic electronic component and general-purpose chip, and cost reduces greatly; Circuit structure is simple, is easy to debugging and operation; Equipment volume is little, is convenient for carrying; Power supply only needs a joint 12V lead-acid accumulator.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is the circuit diagram of pulse generation module of the present invention;
Fig. 3 is the circuit diagram of integration module of the present invention;
Fig. 4 is the circuit diagram of power module of the present invention;
Fig. 5 is the circuit diagram of display module of the present invention;
Fig. 6 is control module circuit principle of compositionality figure of the present invention;
Fig. 7 is an oscillogram (Pspice simulation waveform) before and after the incident pulse shaping.
Embodiment
As shown in Figure 1, a kind of Method of Cable Trouble Point distance-measuring device of the present invention is made up of power module, control module, pulse generation module, integration module and five parts of display module, and wherein power module provides stable working power for other four modular units.
Fig. 2 is the circuit diagram of pulse generation module of the present invention; Four not gate G1, G2, G3, G4, multi-way switch S1, multichannel resistance Var1, diode D1 and capacitor C 1 have been formed signal transformation circuit; Operational amplifier Op1, multi-way switch S2 and multichannel resistance Var2 have been composed in series the signal follow circuit; The signal follow circuit can increase load capacity, also can make input impedance matching.Wherein, a pin PA0 of the input termination microcontroller chip of not gate G1, the input end of the output termination not gate G2 of not gate G1; The input end of the output terminal of not gate G2 and not gate G3 connects negative electrode and the anode of diode D1 respectively; Multi-way switch S1 connects with multichannel resistance Var1, is connected in parallel on diode D1 two ends again, capacitor C 1 one end ground connection; The anode of another terminating diode D1; The input end of the output termination not gate G4 of not gate G3, the in-phase input end of the output termination operational amplifier Op1 of not gate G4, the inverting input of operational amplifier Op1 is connected with its output terminal; The end of the end of operational amplifier Op1 output termination multi-way switch S2, another termination multichannel resistance Var2 of multi-way switch S2, the other end (Impulse) of multichannel resistance Var2 connects the cable input end.
Fig. 3 is the circuit diagram of integration module of the present invention; The reversed-phase output of d type flip flop
meets input end D; Clock signal terminal (Sample) connects the cable input end; In-phase output end Q connects the anode of diode D2, the PA1 end of zero clearing termination microcontroller, set end ground connection.D type flip flop under connecting like this makes that the d type flip flop output level all overturn when each clock signal (Sample) arrived.
Multi-way switch S3, multichannel resistance Var3, operational amplifier Op2 and capacitor C 2 are formed integrating circuit; Wherein connect the reverse input end of operational amplifier Op2 after multi-way switch S3 and the multichannel resistance Var3 series connection; The in-phase input end ground connection of operational amplifier Op2, capacitor C 2 are connected between the inverting input and output terminal of operational amplifier Op2.The output terminal of operational amplifier Op2 connects the input end that sampling keeps chip,
Sampling keeps chip can adopt the LF398N sampling of National Semiconductor company to keep chip; Its effect is the microcontroller PA3 end input voltage instability that prevents that the integrating circuit capacity fall off from causing.Sampling keeps the mould/number conversion input end of the output termination microcontroller of chip, and sampling keeps the chip clear terminal to connect the PA2 end of microcontroller.C3 is a sampling capacitance, and sampling keeps chip to charge to sampling capacitance, equals on the voltage value of sampling capacitance to sample to keeping the output voltage of chip, and is promptly stable through sampling capacitance keep the sampling integral voltage that obtains.
Diode D2 is set before integrating circuit can reduces, improve the accuracy of integrating circuit output voltage integrating circuit stop the to charge electric leakage of back integrating circuit.
Fig. 4 is a power module of the present invention; Comprise a joint 12V lead-acid accumulator, and adopt the A1205S-2W isolated form DC-DC DC voltage-stabilizing chip of MORNSUN company, this DC voltage-stabilizing chip; Input 12V; Output is two independent 5V voltage, one road anodal connect and compose with one road negative pole " public ground ", and two other positive and negative electrode is exactly ± 5V.
Fig. 5 is the circuit diagram of display module of the present invention, and display circuit has adopted four eight sections anode charactron displays altogether.Adopt the method that dynamically shows, a certain moment has only one digit number sign indicating number pipe by gating.Wherein, The emitter of triode S1, S2, S3, S4 connects power Vcc, and the collector of triode S1, S2, S3, S4 connects " the position route selection " of 4 of charactrons respectively, and resistance R s1, Rs2, Rs3, Rs4 one end connect the base stage of triode S1, S2, S3, S4 respectively; The other end is connected to the first bus B us1; The first bus B us1 connects microcontroller PA4～PA7 port, and the position gating of first total line traffic control charactron is realized dynamically showing." the section route selection " of resistance R 1, R2, R3, R4, R5, R6, R7, R8 one termination charactron, a termination second bus B us2.The second bus B us2 connects microcontroller PB0～PB7 port, and the section gating of second total line traffic control charactron is realized the demonstration of tens digit.
Fig. 6 is the circuit principle of compositionality figure of control module, and circuit comprises microcontroller chip, crystal oscillator, electrify restoration circuit etc., and microcontroller chip can adopt the Atmegal of Atmel company 6 microcontrollers.
Fig. 7 is waveform before and after the incident pulse shaping of the present invention, and following waveform is a microcontroller PA0 waveform, and last waveform is an Impulse end waveform after the shaping.
The present invention to the process of trouble spot range observation on the cable is: at first, microcontroller produces a pulse signal, and this pulse signal is sent into the pulse generation module by PA0.Signal transformation circuit in the pulse generation module carries out shaping to this pulse signal, reduces pulse width to adapt to the requirement of range finding.Signal after the shaping of pulse generation module is added on the cable through Impulse end as shown in Figure 1, as the incoming signal of cable.Simultaneously; The logical Sample end of this incoming signal is sent into integration module, triggers d type flip flop, the in-phase output end Q output high level of d type flip flop; Behind diode D2, integrating circuit is charged; Make the linear negative growth of integrating circuit output voltage, i.e. the linear negative growth of operational amplifier Op2 output end voltage, computing formula:
Wherein V is: the integrating circuit output voltage;
R
Var3For: multichannel resistance Var3 inserts the resistance of integrating circuit;
T is: integral time (go into, the reflected signal time interval).
Being added in incoming signal on the cable runs into the trouble spot and will be reflected; Form reflected signal, reflected signal returns along former road by the Sample end and sends into integration module, triggers d type flip flop; Make the in-phase output end Q output low level of d type flip flop, then the charging to integrating circuit stops.If it is initial point (size compared of this pick-up unit itself can be ignored in the length of cable) that this pick-up unit sends the output terminal of incoming signal; The distance of initial point to the position of breaking down is L; The speed that signal (comprising incoming signal and reflected signal) moves on cable is v, and then the duration of charging t to integrating circuit is:
t＝2L/v
Sampling in the integration module keeps chip that the integrating circuit output voltage after stopping to charge is sampled, and send microcontroller with sampled value through the PA3 end.The analog signal conversion that sampling is obtained in microcontroller inside is a digital signal; Calculate the distance L that breaks down on the cable according to the relation between voltage and the fault distance then; And the result that will calculate is presented on the charactron display through display module, thereby accomplishes fault localization and demonstration.
Claims (2)
1. Method of Cable Trouble Point distance-measuring device comprises:
Control module produces detection signal, receives the sampled signal of integration module output, and sampled signal is handled and calculated, the distance of position to the incident end that obtains breaking down;
The pulse generation module comprises signal transformation circuit and signal follow circuit, and signal transformation circuit receives the detection signal of control module generation and carries out shaping, and the signal follow circuit improves the carrying load ability of incoming signal and carries out the cable resistance coupling;
Integration module; Comprise d type flip flop, integrating circuit and sample circuit, the incoming signal after the shaping of d type flip flop received pulse generation module receives reflected signal simultaneously; Incoming signal triggers d type flip flop to begin integrating circuit is charged; Reflected signal triggers d type flip flop and stops the charging to integrating circuit, and sample circuit is to the integrating circuit output voltage sampling after stopping to charge, and the signal after the sampling is delivered to control module;
Display module comprises the charactron display, control module is handled the testing result that obtains be presented on the charactron display;
Power module is for above-mentioned module provides working power;
Described control module adopts the microcontroller chip of inner integrated mould/number conversion function;
Described pulse generation module is made up of the signal transformation circuit and the signal follow circuit of series connection; Signal transformation circuit is made up of four not gate G1, G2, G3, G4, diode D1, multi-way switch S1, multichannel resistance Var1 and capacitor C 1; After connecting, two not gate G1, G2 connect the negative electrode of diode D1; The anode of diode D1 is connected with not gate G3, the G4 of two series connection again, and multi-way switch S1 connects with multichannel resistance Var1, is connected in parallel on diode D1 two ends again; Capacitor C 1 one ends connect diode D1 anode, other end ground connection; The signal follow circuit is composed in series by operational amplifier Op1 and multi-way switch S2, multichannel resistance Var2;
In the described integration module:
A pin PA1 of described d type flip flop zero clearing termination microcontroller chip; The input end D of d type flip flop links to each other with reversed-phase output
, and the in-phase output end Q of d type flip flop connects with the multi-way switch S3 of integrating circuit, multichannel resistance Var3;
Described integrating circuit is made up of multi-way switch S3, multichannel resistance Var3, operational amplifier Op2 and capacitor C 2; Wherein multi-way switch S3 and the reverse input end that meets operational amplifier Op2 after multichannel resistance Var3 connects; The in-phase input end ground connection of operational amplifier Op2, capacitor C 2 are connected between the inverting input and output terminal of operational amplifier Op2;
Be provided with diode D2 between described d type flip flop and the integrating circuit;
Described sample circuit comprises that sampling keeps chip and sampling capacitance C3 to form.
2. Method of Cable Trouble Point distance-measuring device according to claim 1 is characterized in that, described microcontroller chip adopts the Atmega16 microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102704133A CN101949995B (en) | 2010-09-02 | 2010-09-02 | Device for measuring distance of cable fault points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102704133A CN101949995B (en) | 2010-09-02 | 2010-09-02 | Device for measuring distance of cable fault points |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101949995A CN101949995A (en) | 2011-01-19 |
| CN101949995B true CN101949995B (en) | 2012-09-12 |
Family
ID=43453563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102704133A Expired - Fee Related CN101949995B (en) | 2010-09-02 | 2010-09-02 | Device for measuring distance of cable fault points |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101949995B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445637B (en) * | 2011-09-29 | 2016-08-03 | 顾士平 | The online short-circuit point test implementation device of cable |
| CN107727907B (en) * | 2017-09-28 | 2020-10-09 | 歌尔股份有限公司 | Current detection device |
| CN112803720B (en) * | 2021-03-19 | 2021-06-22 | 中国电子科技集团公司第九研究所 | Power supply voltage monitoring circuit of multi-power supply system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001033036A (en) * | 1999-07-22 | 2001-02-09 | Yokogawa Denshikiki Co Ltd | High energy discharge type ignition device |
| CN1450354A (en) * | 2002-02-22 | 2003-10-22 | 英特尔公司 | Integrated adjustable short-haul/long-haul time domain reflectometry |
| CN2610570Y (en) * | 2003-03-06 | 2004-04-07 | 重庆东电通信技术有限公司 | Intelligent testing device for fault of communication line |
| CN2677895Y (en) * | 2003-09-03 | 2005-02-09 | 上海复旦微电子股份有限公司 | Temp. measuring circuit |
| CN1981444A (en) * | 2004-05-07 | 2007-06-13 | 恩德莱斯和豪瑟尔韦泽两合公司 | Device for the analog/digital conversion of a measuring voltage |
| CN101241164A (en) * | 2008-01-25 | 2008-08-13 | 东南大学 | Multifunctional electric cable failure detector |
| CN201255761Y (en) * | 2008-08-11 | 2009-06-10 | 重庆大学 | Micro built-in electric cable failure detection instrument |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3190158B2 (en) * | 1993-03-05 | 2001-07-23 | 株式会社フジクラ | Method for detecting insulator defects or impurities |
-
2010
- 2010-09-02 CN CN2010102704133A patent/CN101949995B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001033036A (en) * | 1999-07-22 | 2001-02-09 | Yokogawa Denshikiki Co Ltd | High energy discharge type ignition device |
| CN1450354A (en) * | 2002-02-22 | 2003-10-22 | 英特尔公司 | Integrated adjustable short-haul/long-haul time domain reflectometry |
| CN2610570Y (en) * | 2003-03-06 | 2004-04-07 | 重庆东电通信技术有限公司 | Intelligent testing device for fault of communication line |
| CN2677895Y (en) * | 2003-09-03 | 2005-02-09 | 上海复旦微电子股份有限公司 | Temp. measuring circuit |
| CN1981444A (en) * | 2004-05-07 | 2007-06-13 | 恩德莱斯和豪瑟尔韦泽两合公司 | Device for the analog/digital conversion of a measuring voltage |
| CN101241164A (en) * | 2008-01-25 | 2008-08-13 | 东南大学 | Multifunctional electric cable failure detector |
| CN201255761Y (en) * | 2008-08-11 | 2009-06-10 | 重庆大学 | Micro built-in electric cable failure detection instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101949995A (en) | 2011-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203705621U (en) | Metering circuit of residual capacity of battery pack | |
| CN101949995B (en) | Device for measuring distance of cable fault points | |
| CN102890243A (en) | Measuring circuit and measuring device for battery capacity as well as battery capacity meter | |
| CN105259532A (en) | Electric vehicle charging pile DC electric energy meter calibration system | |
| CN206710549U (en) | Multistation DC parameter test device for UIS tests | |
| CN104819773A (en) | Device and method for testing peak value optical power of continuous narrow pulse width laser | |
| CN107861027A (en) | A kind of plane cable fault positioner | |
| CN204556103U (en) | The proving installation of continuous narrow spaces peak laser luminous power | |
| CN202256480U (en) | Voltage and current detecting device of power supply of radio-frequency remote system | |
| CN203242917U (en) | A pulse semiconductor laser device driving circuit based on an avalanche transistor | |
| CN202443121U (en) | Laser pulse distance finder | |
| CN103094833A (en) | Pulse drive circuit of semiconductor laser based on avalanche transistor | |
| CN103869144A (en) | Isolation voltage sampling circuit | |
| CN203772933U (en) | Isolation voltage sampling circuit | |
| CN203324878U (en) | Multi-input maximum power tracking control device of photovoltaic power generation inverter | |
| CN2039028U (en) | Dynamic-characteristics tester for a thyristor | |
| CN204886901U (en) | Narrow pulse generating circuit based on tunnel diode | |
| CN104678160B (en) | The measuring circuit of monomer battery voltage in series battery | |
| CN217931992U (en) | Single core cable online fault positioning device | |
| CN203574621U (en) | Pulse switch drive circuit based on laser ranging | |
| CN209496138U (en) | A kind of pulse type laser telescope range-measurement system | |
| CN209590128U (en) | The bionical circuit of neuron and signal frequency detection system | |
| CN107525961A (en) | AC signal zero crossing point detection device | |
| CN201773149U (en) | Real-time online detection device for series voltage source | |
| CN2411489Y (en) | Logic testing probe with easyly testing frequency and duty ratio function |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20150902 |
|
| EXPY | Termination of patent right or utility model |