CN203133252U - Linear stepping motor test device - Google Patents
Linear stepping motor test device Download PDFInfo
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- CN203133252U CN203133252U CN 201320138931 CN201320138931U CN203133252U CN 203133252 U CN203133252 U CN 203133252U CN 201320138931 CN201320138931 CN 201320138931 CN 201320138931 U CN201320138931 U CN 201320138931U CN 203133252 U CN203133252 U CN 203133252U
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- stepping motor
- linear stepping
- motor
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- power sensor
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Abstract
The utility model discloses a linear stepping motor test device, which comprises a load simulation assembly arranged on a pedestal, a placing support used for fixing a linear stepping motor and a force transducer and a displacement sensor used for testing performance of a motor to be detected, a stator of a loading motor in the load simulation assembly is fixed on the pedestal through a first support, a mover of the loading motor is fixed on a slide block on a linear guide rail through a second support, two ends of the force transducer are respectively connected to the second support and an output shaft of the linear stepping motor, the displacement sensor is arranged on the linear guide rail and its slide block, and a controller is connected to the linear stepping motor through wire harness for controlling the motion of the loading motor and the linear stepping motor. The scheme realizes the repeatable test for the linear stepping motor, and the testing precision of the linear stepping motor can be increased.
Description
Technical field
The utility model relates to the motor performance field tests, relates in particular to a kind of linear stepping motor testing apparatus.
Background technology
Linear stepping motor, or claim linear stepper motor, be to be converted into a kind of stepper motor of linear movement at motor internal rotatablely moving.The ultimate principle of linear stepping motor is to adopt a screw rod and nut to be meshed, and takes to prevent someway that bolt and nut from relatively rotating, thereby screw axial is moved.Linear stepping motor is widely used in comprising that manufacturing, close adjustment, accurate fluid measurement, exact position many high-precision requirement field such as move, these application all have very high requirement to the step angle precision of linear stepping motor, the performances such as maximum thrust of leading into pull out torque and motor, so, the performance test of linear stepping motor is even more important.
At present, when linear stepping motor is carried out performance test, mainly contained following two kinds by the mode of measured motor offered load:
(1) adopt the form of counterweight, counterweight is fixed in an end of motor by rope, just can change load value by the size that changes counterweight;
(2) form of employing spring is with the different load of spring generation of different elasticity coefficient.
In the existing testing apparatus, the load mode of spring can not provide constant loading force, and the elastic force of spring can change with the displacement of motor movement; After through long test, spring will lose efficacy.Fall in the test mode of counterweight and since counterweight by rope be connected by measured motor, the elastic deformation of rope causes measurement result inaccurate, repeatability is also bad.
As seen, there is following shortcoming in existing measuring technology to linear stepping motor: low, the poor repeatability of the precision of test result; Data acquisition and record are inconvenient, and testing efficiency is low, is unfavorable for that problem is reviewed and data analysis.
Therefore, but how realizing repeated test to linear stepping motor, and improve its measuring accuracy, is the present technical issues that need to address of those skilled in the art.
The utility model content
In view of this, the utility model provides a kind of linear stepping motor testing apparatus, but is used for realization to the repeated test of linear stepping motor, and improves its measuring accuracy.
In order to address the above problem, the utility model provides a kind of linear stepping motor testing apparatus, comprising:
Base;
The load simulation assembly, comprise loading motor, line slideway and slide block, the stator of described loading motor is fixed in described base by first support, the mover of described loading motor is fixedlyed connected with second support that is fixed in described slide block, described line slideway is fixed in described base, and described slide block slidably is installed on described line slideway;
The power sensor, an end of described power sensor is fixedlyed connected with described second support, and the other end of described power sensor is connected with the output shaft of described linear stepping motor;
Be used for measuring the displacement transducer of described mover displacement;
For the support of laying of the stator of fixing described linear stepping motor, the described support of laying is fixed in described base;
Link to each other with described linear stepping motor by wire harness, control the controller of described loading motor motion and the motion of described linear stepping motor.
Preferably, described equipment also is included in the sliding stand perpendicular to displacement-adjustable in the plane of the output shaft of described linear stepping motor, and the described support of laying is installed on described sliding stand.
Preferably, one end of described power sensor is connected with first transmission shaft, described first transmission shaft is connected with described mover, and the other end of described power sensor is connected with second transmission shaft, and described second transmission shaft links to each other with the output shaft of described linear stepping motor by shaft coupling.
Preferably, be provided with the bracing frame of band through hole between described power sensor and the described shaft coupling, the through hole of support frame as described above is provided with linear bearing, and described second transmission shaft passes described linear bearing and is connected with described shaft coupling.
Preferably, described displacement transducer is the grating rule displacement sensor, and the grating chi of described grating rule displacement sensor is fixed in described line slideway, and the read head of described grating rule displacement sensor is fixed in described slide block.
Preferably, described power sensor is strain chip power sensor.
Preferably, described base is provided with for described load simulation assembly and the described groove of laying support are installed.
Preferably, described load simulation assembly also comprises the base plate that is fixed in described base, and described first support and described line slideway are fixedly installed in described base plate.
Preferably, described controller comprises:
Generate the load simulation closed loop controller of analog voltage;
Generate the tested electric machine controller of giving the motion orientation signal;
Be connected with described load simulation closed loop controller, and be connected with the described loading motor of stating, receive described analog voltage, and drive the loading motor driver of described loading motor motion according to described analog voltage;
Be connected with described linear stepping motor controller, and be connected with described linear stepping motor, receive the described motion orientation signal of giving, and according to the described linear stepping motor driver of driving described linear stepping motor motion for the motion orientation signal;
Gather the data acquisition controller of the shift value of the stressed size of the biphase current of described linear stepping motor, described power sensor and described loading motor simultaneously.
Preferably, described equipment also comprises:
The host computer that is connected with described controller.
The utility model scheme advantage: the linear stepping motor testing apparatus that this programme provides comprises the load simulation assembly that is installed on the base and is used for the support of laying of fixing linear stepping motor, the power sensor and the displacement transducer that are used for the tested motor performance of test, also comprise by wire harness with linked to each other the controller of control loading motor motion and tested motor movement by measured motor.Wherein, the stator of the loading motor in the load simulation assembly is fixed in base by first support, the mover of loading motor is fixed in slide block on the line slideway by second support, the two ends of power sensor connect the output shaft of second support and linear stepping motor respectively, and displacement transducer then is installed on line slideway and the slide block thereof.During test, loading motor provides load force, the big I of its load simulation is regulated according to different testing requirements, and the load force that loading motor provides is more constant, after repeatedly testing, can not change yet, so, compare with the load mode that adopts spring with falling counterweight in the prior art, but this programme has been realized very easy repeated test.This programme adopts the power sensor to measure loading force in real time in loading procedure, be convenient to analyze the problem that occurs in the loading procedure, the measuring head of displacement transducer is fixed on the slide block, can follow the mover motion of loading motor and do straight reciprocating motion at line slideway, in order to measure by the moving displacement value of measured motor, thereby judge by measured motor step-out whether, the measuring accuracy of power sensor and displacement transducer is higher, so compare with existing measuring technology, this programme has improved the measuring accuracy of linear stepping motor.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The integrally-built a kind of synoptic diagram of testing apparatus that Fig. 1 provides for the utility model embodiment;
The testing apparatus one-piece construction front view that Fig. 2 provides for the utility model embodiment;
The structural representation of the controller that Fig. 3 provides for the utility model embodiment;
Integrally-built another synoptic diagram of testing apparatus that Fig. 4 provides for the utility model embodiment.
Among Fig. 1, Fig. 2, Fig. 4:
Base 1, loading motor 21, stator 211, mover 212, line slideway 22, slide block 23, first support 24, second support 25, base plate 26, power sensor 3, first transmission shaft 31, second transmission shaft 32, displacement transducer 4, grating chi 41, read head 42, lay support 5, sliding stand 6, shaft coupling 7, bracing frame 8, linear bearing 9, linear stepping motor 10, controller 11, host computer 12.
Embodiment
Core of the present utility model provides a kind of linear stepping motor testing apparatus, but is used for realization to the repeated test of linear stepping motor, and improves its measuring accuracy.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1 and Fig. 2, the testing apparatus one-piece construction synoptic diagram that Fig. 1 provides for the utility model embodiment; The testing apparatus one-piece construction front view that Fig. 2 provides for the utility model embodiment.
In a kind of specific embodiment, a kind of linear stepping motor testing apparatus that this programme provides comprise base 1, load simulation assembly, power sensor 3, displacement transducer 4 and be used for fixing linear stepping motor 10 stator lay support 5.
Base 1 is provided with for dead load simulated assembly and the stationary installation of laying support 5 parts such as grade, as threaded hole, pilot hole or groove etc., present embodiment is provided with a plurality of grooves at base 1, groove can be very easily with the load simulation assembly or lay parts such as support 5 firm be fixed in base 1, and can realize the installation site of each parts is suitably adjusted along the groove direction, can also dismantle and change each parts easily.
The load simulation assembly is that load force and the primary clustering of testing are provided in this testing apparatus, this assembly comprises loading motor 21, line slideway 22 and slide block 23 again, the stator 211 of loading motor 21 is fixed in base 1 by first support 24, and therefore, stator 211 also maintains static; The mover 212 of loading motor 21 is fixedlyed connected with second support 25 that is fixed in slide block 23, line slideway 22 is fixed in base 1, slide block 23 slidably is installed on line slideway 22, so mover 212 just can be done straight reciprocating motion along line slideway 22, thereby linear stepping motor 10 is applied fictitious load power.
The kind of power sensor 3 has strain tubular type, strain chip and combined type etc., because the precision of strain chip power sensor is higher, can test the performance of exerting oneself of linear stepping motor 10 more accurately, so power sensor 3 has been selected strain chip power sensor for use in the present embodiment.
Utilize power sensor 3 that the output shaft of mover 212 with linear stepping motor 10 coupled together for convenience, usually the end at power sensor 3 is connected with first transmission shaft 31, first transmission shaft 31 is connected with mover 212, being connected with second transmission shaft, 32, the second transmission shafts 32 at the other end of power sensor 3 links to each other with the output shaft of linear stepping motor 10 by shaft coupling 7.
Because after increasing by second transmission shaft 32, distance between power sensor 3 and the linear stepping motor 10 strengthens, second transmission shaft 32 can produce vibration in the test process, in order to reduce the vibration in the test process, make test process more steady, so, the bracing frame 8 of being with through hole between power sensor 3 and shaft coupling 7, be provided with usually, bracing frame 8 can reduce the part vibration of second transmission shaft 32, thereby makes test process more steady.
In order to reduce the friction force of motor movement, improve the stress-bearing capability of second transmission shaft 32 simultaneously, usually be provided with linear bearing 9 in the through hole of bracing frame 8,32 of second transmission shafts pass this linear bearing 9 and are connected with shaft coupling 7, this linear bearing 9 has guide effect, can guarantee the right alignment in the motor movement process.
In test process, need the stator of tested linear stepping motor 10 is fixed, so just can make the output shaft of linear stepping motor 10 do straight reciprocating motion along the axis direction of second transmission shaft 32, so the stator of tested linear stepping motor 10 is fixed in lays support 5, lay support 5 and be fixed in base 1.It is removable laying support 5, tests so that the linear stepping motor 10 of different size is installed.
Right alignment between tested linear stepping motor 10 and loading motor 21 and the power sensor 3 is more high, then the precision of test result is also just more high, so in order to improve its right alignment, this testing apparatus also is included in the sliding stand 6 perpendicular to displacement-adjustable in the plane of the output shaft of linear stepping motor 10, lays 5 on support and is installed on this sliding stand 6.When tested linear stepping motor 10 was installed before test, just can finely tune sliding stand 6, then finely tune thereupon the locus of tested linear stepping motor 10, thereby can make its right alignment reach default standard.
The kind of displacement transducer 4 has multiple, as potentiometric displacement transducer, capacitive displacement transducer, Hall displacement transducer, grating rule displacement sensor etc., because grating rule displacement sensor precision height, signal is handled and is easier to, so, displacement transducer 4 in the present embodiment has been selected the grating rule displacement sensor for use, the grating chi 41 of grating rule displacement sensor is fixed in a side of line slideway 22,42 homonymies that are fixed in slide block 23 of the read head of grating rule displacement sensor, read head 42 is with mover 212 and slide block 23 motions of loading motor 21, thereby can measure the displacement of tested linear stepping motor 10, can judge tested linear stepping motor 10 step-out whether under a fixed load.
The installation of each parts for convenience, load simulation assembly comprise that also base plate 26, the first supports 24 that are fixed in base 1 are fixedly installed in base plate 26 with line slideway 22.Like this, loading motor 21, line slideway 22, slide block 23, first support 24 and second support 25 can be installed on base plate 26 in advance, thereby have reduced assembly process.In addition, because base plate 26 is fixed in base 1, so, other parts that are fixed in base 1 also can be installed on base plate 26, such as will lay support 5 and bracing frame 8 according to default position predetermined fixed in base plate 26, so not only can improve the right alignment of motor, can also further reduce assembly process.
Referring to Fig. 3, Fig. 3 shows a kind of structural representation of above-mentioned controller 11, and controller 11 can comprise:
Generate the load simulation closed loop controller 111 of analog voltage;
Generate the linear stepping motor controller 112 of giving the motion orientation signal;
Be connected with load simulation closed loop controller 111, and be connected with loading motor 21, receive analog voltage, and drive the loading motor driver 113 of loading motor 21 motions according to analog voltage;
Be connected with linear stepping motor controller 112, and be connected with linear stepping motor 10, receive the above-mentioned motion orientation signal of giving, and according to driving the linear stepping motor driver 114 of linear stepping motor 10 motions for the motion orientation signal;
Gather the data acquisition controller 115 of the shift value of the stressed size of biphase current, power sensor 3 of linear stepping motor 10 and loading motor 21 simultaneously.
Above-mentioned load simulation closed loop controller 111 generates analog voltage, and analog voltage is transferred to loading motor driver 113, loading motor driver 113 drives loading motor 21 motions according to the analog voltage that receives, the given power of control loading motor 21 outputs; Linear stepping motor controller 112 generates gives the motion orientation signal, and will be transferred to linear stepping motor driver 114 to the motion orientation signal, linear stepping motor 10 is given the side-to-side movement of motion orientation signal drive motor according to linear stepping motor driver 114 output, data acquisition controller 115 can be gathered the biphase current of linear stepping motor 10 simultaneously in the process of motor movement, the stressed size of power sensor 3, the shift value of loading motor 2, wherein, the above-mentioned motion orientation signal of giving can comprise frequency and the step number of motor movement, and the frequency of motion and step number can be set.
Referring to Fig. 4, integrally-built another synoptic diagram of testing apparatus that Fig. 4 provides for the utility model embodiment.
Different with the said equipment is that this equipment can also comprise the host computer 12 that is connected with controller 11.
Above-mentioned data acquisition controller 115 is gathered the biphase current of linear stepping motor 10, the stressed size of power sensor 3 and the shift value of loading motor 21 simultaneously in the process of motor movement, and with these data upload that collect to host computer 12, observe the operation conditions of judging motors according to the synchronous data presented of host computer 12, and size that can online change load.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments herein.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a linear stepping motor testing apparatus is characterized in that, comprising:
Base (1);
The load simulation assembly, comprise loading motor (21), line slideway (22) and slide block (23), the stator (211) of described loading motor (21) is fixed in described base (1) by first support (24), the mover (212) of described loading motor (21) is fixedlyed connected with second support (25) that is fixed in described slide block (23), described line slideway (22) is fixed in described base (1), and described slide block (23) slidably is installed on described line slideway (22);
Power sensor (3), an end of described power sensor (3) is fixedlyed connected with described second support (25), and the other end of described power sensor (3) is connected with the output shaft of described linear stepping motor;
Be used for measuring the displacement transducer (4) of described mover (212) displacement;
Be used for fixing described linear stepping motor (10) stator lay support (5), the described support (5) of laying is fixed in described base (1);
Link to each other with described linear stepping motor (10) by wire harness, control the controller (11) of described loading motor (21) motion and described linear stepping motor (10) motion.
2. equipment according to claim 1 is characterized in that, described equipment also is included in the sliding stand (6) perpendicular to displacement-adjustable in the plane of the output shaft of described linear stepping motor, and the described support (5) of laying is installed on described sliding stand (6).
3. equipment according to claim 1, it is characterized in that, one end of described power sensor (3) is connected with first transmission shaft (31), described first transmission shaft (31) is connected with described mover (212), the other end of described power sensor (3) is connected with second transmission shaft (32), and described second transmission shaft (32) links to each other with the output shaft of described linear stepping motor by shaft coupling (7).
4. equipment according to claim 3, it is characterized in that, be provided with the bracing frame (8) of band through hole between described power sensor (3) and the described shaft coupling (7), the through hole of support frame as described above (8) is provided with linear bearing (9), and described second transmission shaft (32) passes described linear bearing (9) and is connected with described shaft coupling (7).
5. equipment according to claim 1, it is characterized in that, described displacement transducer (4) is the grating rule displacement sensor, and the grating chi of described grating rule displacement sensor is fixed in described line slideway (22), and the read head of described grating rule displacement sensor is fixed in described slide block (23).
6. equipment according to claim 1 is characterized in that, described power sensor (3) is strain chip power sensor.
7. equipment according to claim 1 is characterized in that, described base (1) is provided with for described load simulation assembly and the described groove of laying support (5) are installed.
8. equipment according to claim 1 is characterized in that, described load simulation assembly also comprises the base plate (26) that is fixed in described base (1), and described first support (24) is fixedly installed in described base plate (26) with described line slideway (22).
9. equipment according to claim 1 is characterized in that, described controller (11) comprising:
Generate the load simulation closed loop controller of analog voltage;
Generate the tested electric machine controller of giving the motion orientation signal;
Be connected with described load simulation closed loop controller, and be connected with described loading motor (21), receive described analog voltage, and drive the loading motor driver of described loading motor (21) motion according to described analog voltage;
Be connected with described linear stepping motor controller, and be connected with described linear stepping motor (10), receive the described motion orientation signal of giving, and according to the described linear stepping motor driver of driving described linear stepping motor (10) motion for the motion orientation signal;
Gather the data acquisition controller of the shift value of the stressed size of biphase current, described power sensor (3) of described linear stepping motor (10) and described loading motor (21) simultaneously.
10. according to any described equipment of claim 1-9, it is characterized in that described equipment also comprises:
The host computer (12) that is connected with described controller (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320138931 CN203133252U (en) | 2013-03-25 | 2013-03-25 | Linear stepping motor test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320138931 CN203133252U (en) | 2013-03-25 | 2013-03-25 | Linear stepping motor test device |
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| CN203133252U true CN203133252U (en) | 2013-08-14 |
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| CN 201320138931 Expired - Lifetime CN203133252U (en) | 2013-03-25 | 2013-03-25 | Linear stepping motor test device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926031A (en) * | 2014-04-24 | 2014-07-16 | 中南大学 | Thrust detection method and system for linear motor |
| CN104898056A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Linear motor test device |
| CN105004993A (en) * | 2015-05-28 | 2015-10-28 | 西北工业大学 | Apparatus and method for testing force-frequency characteristic of linear stepping motor |
| CN106772031A (en) * | 2016-11-28 | 2017-05-31 | 北京航空航天大学 | A kind of straight line force offered load analogue means for linear vibration motor |
| CN108254204A (en) * | 2016-12-28 | 2018-07-06 | 中国科学院长春光学精密机械与物理研究所 | A kind of electric cylinder real-timely testing performance system of dynamically changeable load |
| CN109946011A (en) * | 2019-04-01 | 2019-06-28 | 哈尔滨工业大学 | Linear motor normal force real-time test device |
| CN111812508A (en) * | 2020-06-12 | 2020-10-23 | 星展测控科技股份有限公司 | Motor testing method, device and system and computing equipment |
| CN112924076A (en) * | 2021-01-28 | 2021-06-08 | 南京金城机械有限公司 | Motorcycle braking thrust displacement detection system |
| CN113484540A (en) * | 2021-06-25 | 2021-10-08 | 中国科学院宁波材料技术与工程研究所 | Linear driving device and method for correcting system error of linear driving device |
| CN114136521A (en) * | 2021-11-26 | 2022-03-04 | 西安微电机研究所 | Device and method for testing push-pull force and stroke of linear driving motor |
| CN114397053A (en) * | 2022-01-25 | 2022-04-26 | 西安微电机研究所有限公司 | Linear drive motor push-pull force and stroke testing device |
| CN113484540B (en) * | 2021-06-25 | 2024-04-16 | 中国科学院宁波材料技术与工程研究所 | Linear driving device and correction method for system error of linear driving device |
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2013
- 2013-03-25 CN CN 201320138931 patent/CN203133252U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104898056A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Linear motor test device |
| CN103926031B (en) * | 2014-04-24 | 2016-01-20 | 中南大学 | The thrust measurement method of linear electric motors and detection system |
| CN103926031A (en) * | 2014-04-24 | 2014-07-16 | 中南大学 | Thrust detection method and system for linear motor |
| CN105004993A (en) * | 2015-05-28 | 2015-10-28 | 西北工业大学 | Apparatus and method for testing force-frequency characteristic of linear stepping motor |
| CN106772031B (en) * | 2016-11-28 | 2019-07-12 | 北京航空航天大学 | A kind of straight line force offered load simulator for linear vibration motor |
| CN106772031A (en) * | 2016-11-28 | 2017-05-31 | 北京航空航天大学 | A kind of straight line force offered load analogue means for linear vibration motor |
| CN108254204A (en) * | 2016-12-28 | 2018-07-06 | 中国科学院长春光学精密机械与物理研究所 | A kind of electric cylinder real-timely testing performance system of dynamically changeable load |
| CN109946011A (en) * | 2019-04-01 | 2019-06-28 | 哈尔滨工业大学 | Linear motor normal force real-time test device |
| CN111812508A (en) * | 2020-06-12 | 2020-10-23 | 星展测控科技股份有限公司 | Motor testing method, device and system and computing equipment |
| CN111812508B (en) * | 2020-06-12 | 2022-05-17 | 星展测控科技股份有限公司 | Motor testing method, device and system and computing equipment |
| CN112924076A (en) * | 2021-01-28 | 2021-06-08 | 南京金城机械有限公司 | Motorcycle braking thrust displacement detection system |
| CN113484540A (en) * | 2021-06-25 | 2021-10-08 | 中国科学院宁波材料技术与工程研究所 | Linear driving device and method for correcting system error of linear driving device |
| CN113484540B (en) * | 2021-06-25 | 2024-04-16 | 中国科学院宁波材料技术与工程研究所 | Linear driving device and correction method for system error of linear driving device |
| CN114136521A (en) * | 2021-11-26 | 2022-03-04 | 西安微电机研究所 | Device and method for testing push-pull force and stroke of linear driving motor |
| CN114397053A (en) * | 2022-01-25 | 2022-04-26 | 西安微电机研究所有限公司 | Linear drive motor push-pull force and stroke testing device |
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| CP03 | Change of name, title or address |
Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hengrun Technology Co.,Ltd. Address before: 8 / F, block B, No. 11, Anxiang Beili, Chaoyang District, Beijing 100101 Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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Granted publication date: 20130814 |