CN101377153B - Non-contact type automobile electric gasoline throttle angle sensor for outputting multiplex signals - Google Patents
Non-contact type automobile electric gasoline throttle angle sensor for outputting multiplex signals Download PDFInfo
- Publication number
- CN101377153B CN101377153B CN2008101988817A CN200810198881A CN101377153B CN 101377153 B CN101377153 B CN 101377153B CN 2008101988817 A CN2008101988817 A CN 2008101988817A CN 200810198881 A CN200810198881 A CN 200810198881A CN 101377153 B CN101377153 B CN 101377153B
- Authority
- CN
- China
- Prior art keywords
- output
- signal
- comparison circuit
- throttle angle
- angle sensor
- 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
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The present invention discloses a non-contact automobile electronic throttle angle sensor capable of outputting multiplex signals, which comprises a rotary magnet, a sensing unit, a first comparison circuit and a second comparison circuit; wherein, a linearly changing electric signal generated by the sensing unit is independently and directly outputted to a later-sage electronic control unit; and meanwhile, the linearly changing electric signal generated by the sensing unit is respectively connected with the comparison circuits, for outputting a first pulse signal and a second pulse signal. The non-contact automobile electronic throttle angle sensor has the following advantages: when the two output pulses hop, the precision of corresponding linear output voltages can reach the millivolt level; power supply isolation or groundwire isolation is adopted between the two pulse signal voltages and the linear output signals, so that the electronic control unit can be better protected; crystal triodes are adopted in drive circuits in order to avoid the false operation or operation failure of photocouplers; and since the non-contact automobile electronic throttle angle sensor realizes no contact and two pulse signals and still has linear signal output, the application range of the non-contact automobile electronic throttle angle sensor is widened.
Description
Technical field
The present invention relates to a kind of angle transducer of E-Gas, relate in particular to a kind of non-contact electronic throttle angle sensor for automobile of outputting multiplex signals.
Background technique
During automobile was advanced, the conventional engines operating mechanism was by drag-line (stone dead wire) or pull bar, and an end connects throttle and quickens foot treadle, the other end joint valve interlock plate and working.But this traditional throttle application category is restricted and lacks accuracy, and under the automotive electronic technology development situation that makes rapid progress, E-Gas arises at the historic moment.
The E-Gas control system mainly is made up of gas pedal, potentiometer, ECU (electronic control unit), data/address bus, servomotor and throttle execution mechanism.In early days, the potentiometer here is to adopt the swept resistance formula, it has many shortcomings, because it has point of contact, the electrical spark that have (rotational life: about 3,000,000 times) easy to wear, poor reliability, produces once in a while can disturb working state many shortcomings such as (thereby burying potential safety hazard) of ECU.Therefore, research and develop and apply the magnetosensitive non-contact angle sensor in recent years abroad one after another.The magnetosensitive non-contact angle sensor is to make magneto sensitive element place rotating magnetic field, and it exports voltages having different magnitude because of the difference along with rotation angle.It is contactless, can not wear and tear does not have noise (rotational life: 〉=1,000 ten thousand times) yet, be fit to the application of automotive electronicsization with the industrial control of various requirement strictness, but also there is the shortcoming of having only linear signal output in existing magnetosensitive non-contact angle sensor simultaneously.
Summary of the invention
The object of the invention is to provide a kind of both can export linear signal, also can export the non-contact electronic throttle angle sensor for automobile of the above pulse signal of two-way simultaneously.
Purpose of the present invention can realize by following scheme: a kind of non-contact electronic throttle angle sensor for automobile of outputting multiplex signals comprises:
Rotary magnet is used to produce the magnetic signal that corresponding gasoline throttle angle changes;
Sensing unit is used to receive the magnetic signal of magnet generation and is converted into linear electrical signal output;
First comparison circuit and second comparison circuit are used for one road electrical signal of sensing unit output is exported two pulse signals behind each comparison circuit;
The linear change electrical signal that sensing unit produces divides one the tunnel directly to output to back level electronic control unit separately; The linear change electrical signal of sensing unit generation simultaneously inserts described comparison circuit respectively, wherein the linear change electrical signal inserts the relatively back output first via of the in-phase input end pulse signal of first comparison circuit, and the linear change electrical signal inserts the inverting input of second comparison circuit and relatively exports the second road pulse signal in the back.
The present invention also can comprise:
First photo coupler and second photo coupler are used for the isolation output of every road pulse signal;
First drive circuit and second drive circuit are used to drive corresponding photo coupler;
The first comparison circuit output pulse signal again through first drive circuit and first photoelectric coupler isolation output first via pulse signal to back grade electronic control unit; The second comparison circuit output pulse signal is exported the second road pulse signal to back grade electronic control unit through second drive circuit and second photoelectric coupler isolation again.
Drive circuit of the present invention adopts the transistor driving element.
The present invention will export the power supply of linear voltage separately and separate with the power supply of output two pulse signals.
The present invention will export linear voltage separately and separate with the ground circuit of output two pulse signals.
First pulse signal of the present invention is for often opening idle signal, and the first pulse signal generation saltus step jumps to low level by high level when sensor rotates to set angle.
Second pulse signal of the present invention is the normally-closed slow-speed signal, the second pulse signal generation saltus step when sensor rotates to set angle, by low transition to high level.
The present invention also can implement with following technological scheme: a kind of non-contact electronic throttle angle sensor for automobile of outputting multiplex signals comprises: rotary magnet is used to produce the magnetic signal that corresponding gasoline throttle angle changes; Sensing unit is used to receive the magnetic signal of magnet generation and is converted into linear electrical signal output; Comparison circuit more than two pairs is used for the pulse signal of road electrical signal more than output two-way behind each comparison circuit with sensing unit output; The photo coupler corresponding with paired comparison circuit is used for the isolation output of every road pulse signal; Be connected with the photo coupler drive circuit between the input end of each comparison circuit output terminal and corresponding photo coupler; The linear change electrical signal that sensing unit produces divides one the tunnel directly to output to back level electronic control unit separately; The linear change electrical signal of sensing unit generation simultaneously inserts every pair of relatively circuit, in every pair of comparison circuit, the linear change electrical signal inserts the relatively back output of in-phase input end of one of them comparison circuit, export one road pulse signal to back grade electronic control unit through drive circuit and photoelectric coupler isolation again, relatively back output of the inverting input that the linear change electrical signal inserts another comparison circuit is exported another road pulse signal to back grade electronic control unit through drive circuit and photoelectric coupler isolation again.
The invention has the advantages that:
1) obtains comparative voltage by the linear output signal of sensor, thereby can both realize that corresponding linear output voltage is accurate to the millivolt level when making two-way output impulse hits, can accomplish that so corresponding gas pedal angle stroke reaches to the precision of 5/1000ths degree.
2) making two pulse signals voltage and linear output signal voltage is to use light-coupled isolation, adopts power supply to isolate, and promptly the power supply of the linear output voltage signal of output and two pulse signals output is isolated separately; Perhaps the ground wire between them is isolated, and has strengthened the protective capability of the electronic control unit (ECU) to automobile like this, can improve reliability.
3) drive circuit that adopts transistor to make can be avoided the malfunction of optocoupler or motionless, thereby improve reliability.
4) realized being the contactless two pulse signals that has again, also kept linear signal output, this has just enlarged the application area of non-contact electronic throttle angle sensor for automobile, adapts to the application of the automotive electronicsization of various requirement strictness.
5) product of the present invention is contactless, not also just not wearing and tearing of friction, and output voltage is very constant, has not both had noise also to prolong working life widely.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is embodiments of the invention one circuit theory diagrams;
Fig. 3 is a signal curve schematic representation of the present invention;
Fig. 4 is embodiments of the invention two circuit theory diagrams.
Embodiment
The present invention is a kind of non-contact electronic throttle angle sensor for automobile of outputting multiplex signals, comprising: rotary magnet is used to produce the magnetic signal that corresponding gasoline throttle angle changes; Sensing unit is used to receive the magnetic signal of magnet generation and is converted into linear electrical signal output; A pair of above comparison circuit is used for the pulse signal of road electrical signal more than output two-way behind each comparison circuit with sensing unit output; The photo coupler corresponding with paired comparison circuit is used for the isolation output of every road pulse signal; Be connected with the photo coupler drive circuit between the input end of each comparison circuit output terminal and corresponding photo coupler; The linear change electrical signal that sensing unit produces divides one the tunnel directly to output to back level electronic control unit separately; The linear change electrical signal of sensing unit generation simultaneously inserts every pair of relatively circuit, in every pair of comparison circuit, the linear change electrical signal inserts the in-phase input end of one of them comparison circuit and relatively exports, export one road pulse signal to back grade electronic control unit through drive circuit and photoelectric coupler isolation again, the linear change electrical signal inserts the inverting input of another comparison circuit and relatively exports, and exports another road pulse signal to back grade electronic control unit through drive circuit and photoelectric coupler isolation again.
Above-mentioned input difference can be to obtain from same sensing unit to the comparative voltage that compares circuit, also can obtain from different sensing units, and the method for connection is the same.
As shown in Figure 1, for the present invention adopts the embodiment of a pair of comparator, gas pedal driven rotary magnet rotates, and the magnetic line of force is produced electrical signal by the cutting of the magneto sensitive element of sensing unit.Integrated magneto sensitive element, microprocessor MCU and digital signal processing circuit DSP in sensing unit RV1 the inside, it is the IC composition module of KMZ41 and UZZ9001 that sensing unit RV1 can adopt model.Magnetic signal is by this module converts output linear voltage, and its first via is linear output voltage signal APS.The APS signal wherein has one the tunnel to be the linearizing signal that changes with the electronic accelerator pedal of automobile angle; Two-way is input to the two-way comparison circuit respectively in addition, obtains two pulse signals IVS2 and IVS3 through drive circuit and photo coupler.Wherein IVS2 often opens idle signal, and IVS3 is the normally-closed slow-speed signal.The electronic control unit ECU that three road signal APS, IVS2 and IVS3 offer in the automobile at last uses.
Its corresponding circuit diagram mainly comprises integrated comparator U1 as shown in Figure 2, drives transistor Q1, the Q2 of photoelectricity coupling, photo coupler U2, U3, diode D1 and some resistance R 1～12.Wherein the model of integrated comparator employing is LM2904, comprises a pair of comparison circuit U1:A and U1:B.
Directly export from the first via linear signal of sensing unit RV1 output as the APS signal.
Pass through the end of oppisite phase 2 that resistance R 1 is input to the first comparison circuit U1:A from the second route signal of sensing unit RV1 output, in-phase end 3 current potentials are fixed by resistance R 4, R5, and output terminal 1 connects transistor Q1 base stage through resistance R 7; The radio utmost point ground connection of transistor Q1, collector electrode connect the light-emitting diodes tube cathode of photo coupler U2 the inside; The light-emitting diodes tube anode of photo coupler U2 connects power Vcc 1 through R11, and the phototube base stage of photo coupler U2 the inside is unsettled, and collector electrode connects diode D1 negative electrode, and radio is pulse signal IVS2 output terminal very, through load resistance R9 ground connection; Diode D1 anode connects power Vcc 2.Realize that by first, second photo coupler the circuit that will export linear voltage separately separates with the power supply of the both circuits of output two pulse signals like this.
Connect similar from the Third Road linear signal of sensing unit RV1 output to the second the tunnel, difference is that sensing unit RV1 output signal is input to the in-phase end 5 of the second comparison circuit U1:B after resistance R 2, the current potential of its end of oppisite phase 6 is fixed by resistance R 3, R6, and output terminal 7 connects transistor Q2 base stage through resistance R 8.
According to above-mentioned connection, two photo couplers can be with the isolated from power of linear output voltage signal APS and two pulse signal IVS2, IVS3.
Working principle of the present invention is seen Fig. 3, and wherein the APS among Fig. 3 is the linear output voltage signal of angle transducer, IVS2 be angle transducer often open idle signal, IVS3 is the normally-closed slow-speed signal of angle transducer;
Spacing starting point and spacing terminal point on the transverse axis when θ=A ° and the rotation of θ=B ° of expression angle transducer, a is the limited possibility of an angle transducer rotation angle range, b is the angle value of the IVS2 idle signal of angle transducer when occurring being low level by the high level saltus step, c is the angle value of angle transducer IVS3 idle signal when occurring being high level by low transition, d is that the angle transducer output voltage can be realized the rotation angle range that linear lifting changes, and e is the angle that may error to occur when installing and reserve in order to look after;
The longitudinal axis is represented output voltage values: the Vcc=5V that top occurs is the operating voltage of angle transducer, the minimum point of the longitudinal axis is 0V, f is the minimum value of APS, g is the instant numerical value of IVS2 idle signal APS when occurring being low level by the high level saltus step, h is the instant numerical value of IVS3 idle signal APS when occurring being high level by low transition, j is the maximum value of APS, and 5V/0V represents that the magnitude of voltage of the high level of IVS2, IVS3 two-way idle signal is 5V, and the magnitude of voltage during low level is 0V; The 5V/0V voltage value here admits of predetermined range with interior deviation.
The voltage trace of three-way output signal APS, IVS2, IVS3 with dashed lines in Fig. 3 is represented respectively.
After the motor of automobile started, when electronic accelerator pedal of automobile was in full relaxation state, the APS output voltage was the voltage that the f in the corresponding diagram 3 is ordered.When the driver begins a little firmly to trample efp, drive the rotating shaft rotation of E-Gas angle transducer and make angle transducer rotate slight angle stroke forward, output characteristics according to angle transducer, it can improve output voltage, it is exactly the APS rising among Fig. 3, when APS rises to g point voltage among Fig. 3, the first comparison circuit U1:A among Fig. 2 can take place by high level to low level saltus step, this low level becomes the transistor Q1 that is originally conducting to end, thereby the light emitting diode among the photo coupler U2 is extinguished, causing phototube among the photo coupler U2 to be transferred to by original conducting ends, thereby IVS2 is an output low level by the saltus step of original output high level, and keeps down always.In like manner, when APS rises to h point voltage among Fig. 3, integrated operational amplifier U1:B among Fig. 2 can take place by the saltus step of low level to high level, this high level makes and is originally that the transistor Q2 that ends becomes conducting, thereby the light emitting diode among the photo coupler U3 is lighted, cause the phototube among the photo coupler U3 to transfer conducting to, thereby IVS3 is a high level by original output low level saltus step, and keeps down always by original ending.When the driver continued firmly to trample efp, the rotating shaft of drive E-Gas angle transducer was rotated and the output voltage APS of angle transducer is constantly risen.Be input to the real-time control that has just realized in the electronic control unit (ECU) of automobile the motor car engine working condition along with the voltage of these variations of APS, IVS2, IVS3.
As shown in Figure 4, the foregoing description difference is that the light-emitting diodes tube anode of diode D1 anode and photo coupler U2, U3 is connected to same power Vcc relatively; The light-emitting diodes tube cathode of photo coupler U2, U3 is connected to the first grounding end GND1 through transistor Q1 and Q2, the phototube signal output part of photo coupler U2, U3 meets the second grounding end GND2 respectively behind resistance R 9, R10, realize that by first, second photo coupler the circuit that will export linear voltage separately separates with the ground circuit of the both circuits of output two pulse signals like this.
Embodiments of the present invention are not limited thereto, and as selecting two pairs or more comparison circuit for use, adopt connection same as the previously described embodiments, correspondingly can export four road pulse signals; Driving triode also can be with other drive circuit etc.; therefore according to foregoing of the present invention; ordinary skill knowledge and customary means according to related domain; do not breaking away under the above-mentioned basic fundamental thought of the present invention prerequisite; can also make modification, replacement or the change of other various ways, all drop within the rights protection scope of the present invention.
Claims (8)
1. the non-contact electronic throttle angle sensor for automobile of an outputting multiplex signals comprises:
Rotary magnet is used to produce the magnetic signal that corresponding gasoline throttle angle changes;
Sensing unit is used to receive the magnetic signal of magnet generation and is converted into linear electrical signal output;
It is characterized in that also comprising:
First comparison circuit and second comparison circuit are used for one road electrical signal of sensing unit output is exported two pulse signals behind each comparison circuit;
The linear change electrical signal one tunnel that sensing unit produces directly outputs to back level electronic control unit separately; The linear change electrical signal of sensing unit generation simultaneously inserts described first, second comparison circuit respectively, wherein the linear change electrical signal in-phase input end that inserts first comparison circuit is through back output first via pulse signal relatively, and the inverting input that the linear change electrical signal inserts second comparison circuit is through back output the second road pulse signal relatively.
2. the non-contact electronic throttle angle sensor for automobile of a kind of outputting multiplex signals according to claim 1 is characterized in that, also comprises:
First photo coupler and second photo coupler are used for the isolation output of every road pulse signal;
First drive circuit and second drive circuit are used to drive corresponding photo coupler;
The first comparison circuit output pulse signal again through first drive circuit and first photoelectric coupler isolation output first via pulse signal to back grade electronic control unit; The second comparison circuit output pulse signal is exported the second road pulse signal to back grade electronic control unit through second drive circuit and second photoelectric coupler isolation again.
3. the non-contact electronic throttle angle sensor for automobile of a kind of outputting multiplex signals according to claim 2 is characterized in that, described first, second drive circuit adopts the transistor driving element.
4. the non-contact electronic throttle angle sensor for automobile of a kind of outputting multiplex signals according to claim 2 is characterized in that, the linear output voltage signal of output separately and the power supply of two-way pulse output signals are separated.
5. the non-contact electronic throttle angle sensor for automobile of a kind of outputting multiplex signals according to claim 2 is characterized in that, the linear output voltage signal of output separately and the ground circuit of two-way pulse output signals are separated.
6. the non-contact electronic throttle angle sensor for automobile of a kind of outputting multiplex signals according to claim 1, it is characterized in that, saltus step takes place for often opening idle signal in described first pulse signal when sensor rotates to set angle, jump to low level by high level.
7. the non-contact electronic throttle angle sensor for automobile of a kind of outputting multiplex signals according to claim 1, it is characterized in that, described second pulse signal is the normally-closed slow-speed signal, and saltus step takes place when sensor rotates to set angle, by low transition to high level.
8. the non-contact electronic throttle angle sensor for automobile of an outputting multiplex signals comprises: rotary magnet is used to produce the magnetic signal that corresponding gasoline throttle angle changes; Sensing unit is used to receive the magnetic signal of magnet generation and is converted into linear electrical signal output; It is characterized in that also comprising: the comparison circuit more than two pairs is used for a route electrical signal of sensing unit output is exported pulse signal more than four tunnel behind each comparison circuit; The photo coupler corresponding with paired comparison circuit is used for the isolation output of every road pulse signal; Be connected with the photo coupler drive circuit between the input end of each comparison circuit output terminal and corresponding photo coupler; The linear change electrical signal that sensing unit produces divides one the tunnel directly to output to back level electronic control unit separately; The linear change electrical signal of sensing unit generation simultaneously inserts every pair of relatively circuit, in every pair of comparison circuit, the linear change electrical signal inserts the in-phase input end of one of them comparison circuit, compare back output in real time, export one road pulse signal to back grade electronic control unit through drive circuit and photoelectric coupler isolation again; The linear change electrical signal inserts the inverting input of another comparison circuit, compares back output in real time, exports another road pulse signal to back grade electronic control unit through drive circuit and photoelectric coupler isolation again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101988817A CN101377153B (en) | 2008-09-27 | 2008-09-27 | Non-contact type automobile electric gasoline throttle angle sensor for outputting multiplex signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101988817A CN101377153B (en) | 2008-09-27 | 2008-09-27 | Non-contact type automobile electric gasoline throttle angle sensor for outputting multiplex signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101377153A CN101377153A (en) | 2009-03-04 |
| CN101377153B true CN101377153B (en) | 2011-03-09 |
Family
ID=40420863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101988817A Expired - Fee Related CN101377153B (en) | 2008-09-27 | 2008-09-27 | Non-contact type automobile electric gasoline throttle angle sensor for outputting multiplex signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101377153B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1553277A1 (en) * | 2004-01-06 | 2005-07-13 | Yamaha Hatsudoki Kabushiki Kaisha | Throttle device and vehicle |
| CN2878151Y (en) * | 2005-03-23 | 2007-03-14 | 北京理工大学 | Electronic device capable of preventing accelerator misoperation for automobile |
| CN2934604Y (en) * | 2006-08-01 | 2007-08-15 | 天津卓远电工科技有限公司 | Electronic throttle for automobile |
-
2008
- 2008-09-27 CN CN2008101988817A patent/CN101377153B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1553277A1 (en) * | 2004-01-06 | 2005-07-13 | Yamaha Hatsudoki Kabushiki Kaisha | Throttle device and vehicle |
| CN2878151Y (en) * | 2005-03-23 | 2007-03-14 | 北京理工大学 | Electronic device capable of preventing accelerator misoperation for automobile |
| CN2934604Y (en) * | 2006-08-01 | 2007-08-15 | 天津卓远电工科技有限公司 | Electronic throttle for automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101377153A (en) | 2009-03-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109831073B (en) | Linear motor position feedback device | |
| CN206523760U (en) | The general detection circuit of digital quantity input signal | |
| CN101377153B (en) | Non-contact type automobile electric gasoline throttle angle sensor for outputting multiplex signals | |
| CN201503258U (en) | Non-contact electronic accelerator pedal position sensor for automobile | |
| CN205860980U (en) | High-precision magnetostrictive displacement sensor signal conditioning circuit | |
| CN101151449B (en) | Device and method for communication between a control system for small internal combustion engines and an external computer | |
| CN103174524A (en) | Electronic throttle valve control system | |
| CN106094653B (en) | A kind of current control circuit based on retaining mechanism | |
| CN202053255U (en) | Control system with man-machine interface for manipulator with multiple steering engines | |
| CN102880483B (en) | Serial port programming and watchdog compatible circuit of electric driving controller of electric vehicle | |
| CN101718797B (en) | Post processor for double-path output of revolution speed transducer | |
| CN100535881C (en) | Asynchronous serial communication method based on electric current loop | |
| CN206517053U (en) | Vehicle electric appliance device with protection and detection mechanism for reverse connection of power supply | |
| CN205958993U (en) | Current control circuit based on locking mechanism | |
| CN101205838A (en) | Electronic accelerator controller | |
| CN110785634A (en) | Current sensor | |
| CN201364475Y (en) | Intelligent control system based on laser displacement sensor and servo controller | |
| CN202300671U (en) | Electric injection control device integrating throttle valve position sensor | |
| CN206057367U (en) | A kind of automobile speed pulse hunting and the instrument of terminal pulse coefficient calibration | |
| CN206060600U (en) | Based on the electric motor car of STM32 brshless DC motor arrangements for speed regulation | |
| CN202628288U (en) | Engine rotational speed signal converting device and engineering machine | |
| JP2017522220A (en) | Haptic accelerator pedal with controller assembly | |
| CN203854589U (en) | Protective circuit for external sensor of commercial vehicle instrument | |
| CN112444274A (en) | Split type encoder with automatic calibration function | |
| CN204373669U (en) | A kind of dual rotary transformer decode system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20090116 Address after: No. 40, No. 104, Heping Road, Guangdong, Zhaoqing, No. 103 Applicant after: Zhaoqing sound optical electronic equipment Co., Ltd. Co-applicant after: Huang Hui Co-applicant after: Wu Guowei Address before: No. 40, No. 104, Heping Road, Guangdong, Zhaoqing, No. 103 Applicant before: Zhaoqing sound optical electronic equipment Co., Ltd. Co-applicant before: Huang Hui |
|
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110309 Termination date: 20200927 |