CN101275987A - Equipment test system and method - Google Patents
Equipment test system and method Download PDFInfo
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- CN101275987A CN101275987A CNA2008100669208A CN200810066920A CN101275987A CN 101275987 A CN101275987 A CN 101275987A CN A2008100669208 A CNA2008100669208 A CN A2008100669208A CN 200810066920 A CN200810066920 A CN 200810066920A CN 101275987 A CN101275987 A CN 101275987A
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Abstract
The present invention relates to the communication field and provides an equipment testing system and a method thereof. The method comprises the following procedures: A. transmitting the performance data which is collected in the running process by the equipment to be tested to a wireless communication apparatus; B. transmitting the performance data by the wireless communication equipment to a data processing equipment through a wireless transmission mode; C. analyzing the performance data by the data processing equipment, obtaining the operation parameter of this time and storing locally; D. feeding back the operation parameter of this time to the tested equipment by the wireless communication equipment through a wireless transmission mode, executing the procedure A to C repeatedly; and E. comparing the operation parameter at each time by the data processing equipment, and determining the optimum operation parameter of the tested equipment. From the content above, in the process for executing equipment testing according to the invention, the difference is that the data is executed with a wireless automatic receiving and transmitting mode compared with prior art, and the test efficiency is higher combined with an independent data processing equipment for analyzing and calculating.
Description
Technical field
The present invention relates to the communications field, more particularly, relate to a kind of device test system and method.
Background technology
Electronic equipment generally all needs to carry out testing of equipment in development at present, and utilize debugger to debug according to test result, present test mode is: tested equipment is linked to each other with computing machine, by the performance data of the tested equipment of manual input, analyze to obtain the optimized operation parameter according to these performance datas then.These performance datas mainly are the data that tested equipment obtains in operational process.For example, if this tested equipment is variable-frequency motor, these performance datas are data such as line current, voltage, speed, magnetic flux so; If this tested equipment is stirring machine, these performance datas are the data that can record speed and rate of change, overshoot and overshoot time etc. so.Existing multiple control modes is carried out this test, comprise fuzzy control, proportion integration differentiation (Proportional-Integral-Differential, PID) control, expert's control etc., no matter but be which kind of control mode, all need experience accumulation just can obtain optimized parameter.
Current mainly is to adopt adaptive algorithm to debug, and adaptive algorithm is calculated more complicated, because the defective of single-chip microcomputer arithmetic capability causes operation efficiency too low, it is slower that system obtains the speed of empirical data.In addition, tested equipment generally need link to each other with computing machine, and this can cause test under some is not suitable for placing the situation of computing machine difficulty makes the range of application of this test mode be restricted.
Therefore need a kind of new apparatus testing method, improve the testing efficiency of electronic equipment.
Summary of the invention
The object of the present invention is to provide a kind of device test system, be intended to solve the low problem of testing efficiency that exists when prior art is carried out testing of equipment.
The present invention also aims to provide a kind of apparatus testing method, to solve the above-mentioned problems in the prior art better.
In order to realize goal of the invention, described device test system comprises tested equipment, data processing equipment, also comprise the Wireless Telecom Equipment that carries out data interaction respectively with wireless mode with described tested equipment and data processing equipment, it receives the performance data that tested equipment is gathered in operational process, and is forwarded to data processing equipment and carries out data analysis.
Preferably, described tested equipment further comprises data acquisition module, reaches the communication interface that is complementary with described Wireless Telecom Equipment;
The tested equipment of described data collecting module collected is in the performance data in when operation, and described performance data is sent to Wireless Telecom Equipment by communication interface according to communication protocol.
Preferably, described Wireless Telecom Equipment further comprises radio receiving transmitting module, data processing module and communication interface;
The performance data that described radio receiving transmitting module is used for tested equipment is sent is imported data processing module;
Described data processing module carries out data qualification and data processing to described performance data;
Described communication interface is used to set up communicating to connect between tested equipment and described data processing module.
Preferably, described radio receiving transmitting module is a radio-frequency antenna, and described data processing module is a microcontroller.
Preferably, described data processing equipment further comprises radio receiving transmitting module, data conversion module, parameter calculating module, data memory module and statistics contrast module;
Described radio receiving transmitting module and Wireless Telecom Equipment carry out data interaction, comprise receiving the performance data that tested equipment repeatedly sends, and the operational factor each time that calculates of feedback data treatment facility, and the feedback optimal operating parameter;
Described data conversion module is used for the data that radio receiving transmitting module receives or sends are changed;
Described parameter calculating module is used for analyzing according to the performance data that receives, and calculates operational factor each time;
The described operational factor each time of described data memory module storage;
Described statistics contrast module links to each other with data memory module, is used for described performance data and corresponding operational factor each time compared, and judges optimal operating parameter.
In order to realize goal of the invention better, a kind of method of carrying out testing of equipment also is provided, may further comprise the steps:
A. tested equipment is sent to Wireless Telecom Equipment with the performance data that it collects in operational process;
B. Wireless Telecom Equipment is transmitted to data processing equipment by wireless transmission method with described performance data;
C. data processing equipment is analyzed described performance data, obtains preserving when time operational factor and in this locality;
D. Wireless Telecom Equipment feeds back to tested equipment by wireless transmission method with the described time operational factor of working as, and repeats steps A to C;
E. data processing equipment compares each time operational factor, and judges the optimal operating parameter of described tested equipment.
Preferably, the Frame of performance data comprises the test coding in the described steps A, and described test coding comprises device type frame, analysis type frame and test data section.
Preferably, the wireless transmission method among the described step B comprises Bluetooth transmission, Infrared Transmission, the transmission of purple honeybee.
Preferably, among the described step C, data processing equipment adopts Kalman filtering that described performance data is carried out Filtering Processing, and utilizes genetic algorithm or by neural network described performance data is analyzed.
Preferably, in the described step e, data processing equipment is with graph mode or X-Y plane curve mode reflection performance data and corresponding operational factor each time, and compares.
As from the foregoing, the present invention is in the process of carrying out testing of equipment, difference with the prior art is data are adopted the mode of wireless receiving and dispatching, in conjunction with data processing equipment independently, replace the more weak tested device handler of computing power to carry out high-precision analytical calculation automatically with its powerful performance, make higher, the better effects if of testing efficiency; In addition, the Frame of transmitting-receiving adopts general test coding, and native system can be tested various types of electronic equipments, and range of application is wider.
Description of drawings
Fig. 1 is the structural drawing of device test system among the present invention;
Fig. 2 is the structural drawing of device test system in one embodiment of the present of invention;
Fig. 3 is the method flow diagram that carries out testing of equipment among the present invention;
Fig. 4 is that the Z-N method PID that adopted when calculating operational factor according to performance data in one embodiment of the present of invention is from adjusting the experience table;
Fig. 5 is the waveform chart that is used to write down the actual operation parameters of tested equipment in one embodiment of the present of invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the present invention, tested equipment carries out data interaction by a Wireless Telecom Equipment and data processing equipment independently, the performance data that obtains in the time of can be with its each run sends to this data processing equipment and carries out computational analysis, and operation once more after the operational factor that receives the data processing equipment feedback, report new performance data, and so forth repeatedly, by data processing equipment preservation operational factor each time, be analyzed then, obtain the optimal operating parameter of this tested equipment.Because the present invention adopts the mode of wireless automatic transmitting-receiving to data, and in conjunction with independently data processing equipment analytical calculation, makes testing efficiency higher.
Fig. 1 shows the structure of device test system among the present invention, and this system comprises tested equipment 100, Wireless Telecom Equipment 200 and data processing equipment 300.Should be noted that the annexation between each equipment is the needs of explaining its information interaction and control procedure for clear in all diagrams of the present invention, therefore should be considered as annexation in logic, and should not only limit to physical connection.Wherein:
(1) tested equipment 100 can be various electronic, for example variable-frequency motor, stirring machine etc.It comprises one section test procedure, is used at the operational process collecting performance data, and is transferred to Wireless Telecom Equipment 200 by certain communication mode.The data that these performance datas obtain when being 100 operations of tested equipment: if variable-frequency motor then is data such as line current, voltage, speed, magnetic flux; If stirring machine, generally have only the data that speed and rate of change thereof, overshoot and overshoot time etc. can record.
In an exemplary scenario, as shown in Figure 2, tested equipment 100 further comprises data acquisition module 101 and communication interface 102:
(2) Wireless Telecom Equipment 200 receives the performance data that tested equipment 100 is gathered in operational process, and is forwarded to data processing equipment 300 and carries out data analysis.
In an exemplary scenario, as shown in Figure 2, Wireless Telecom Equipment 200 further comprises radio receiving transmitting module 201, data processing module 202 and communication interface 203:
Radio receiving transmitting module 201 is used for the performance data that tested equipment 100 sends is imported data processing module 202.In one embodiment, radio receiving transmitting module 201 is RF, carries out data interaction with the communication interface 102 in the tested equipment 100, and its wireless transmission method comprises Bluetooth transmission, Infrared Transmission, purple honeybee (ZigBee) transmission etc.
202 pairs of described performance datas of data processing module are carried out data qualification, and carry out data necessary and handle.In one embodiment, this data processing module 202 is MCU.
In an example, Wireless Telecom Equipment 200 is connected on the 6 pin sockets of tested equipment 100 by 6 pin contact pins, tested equipment 100 is carried out transmitting/receiving program in the time of on connecting, and finally obtains high-precision system model or optimal PID value by data processing equipment 300; After Wireless Telecom Equipment 200 is pulled out, tested equipment 100 is not carried out transmitting/receiving program, then carry out computing time short but system model observation that precision is low or PID from setting procedure, still can carry out router feature after Wireless Telecom Equipment 200 is pulled out simultaneously, wireless data is transmitted to satisfy the long situation of some wireless communication distance.In one embodiment, this system is by tested equipment 100, patches Wireless Telecom Equipment 200 thereon, and constitutes with Wireless Telecom Equipment 200 isostructural wireless routing devices and data processing equipment 300.
(3) data processing equipment 300 is used to carry out data processing, comprise and receive the performance data that tested equipment 100 sends, calculate when inferior operational factor according to these performance datas, and the operational factor that will work as time feeds back to tested equipment 100 and moves once more, so circulation, operational factor with each time of being stored is analyzed at last, determines optimal operating parameter.This data processing equipment 300 typically can be personal computer (Personal Computer, PC)
In an exemplary scenario, as shown in Figure 2, data processing equipment 300 further comprises radio receiving transmitting module 301, data conversion module 302, parameter calculating module 303, data memory module 304 and statistics contrast module 305;
Radio receiving transmitting module 301 is used for carrying out data interaction with Wireless Telecom Equipment 200, comprises receiving the performance data that tested equipment sends for more than 100 time, and the operational factor each time that calculates of feedback data treatment facility 300, and the feedback optimal operating parameter.
This step specifically comprises: (1) data processing equipment 300 according to the data layout identification equipment type that receives, require the function analyzed, as pid parameter obtain, motor internal parameter acquiring etc.; (2) actual parameter that obtains is used as variable and is joined pid parameter in setting procedure or parameter recognition program, calculate the pid parameter or the motor internal parameter of needs according to the rule (best performance, time optimal etc.) of user's needs; (3) keeping records comprises the current time, comes the data of self-testing device, the findings data that computing draws etc., and sends to tested equipment 100 and be used for next time debugging.
About concrete algorithm in the step (2), be example with PID from adjusting, adopt the simplest Z-N method PID from adjusting.In the data layout that receives: device type is a stirring machine, analytical approach is that Z-N method PID is from adjusting, real data is speed, percentage speed variation, threshold oscillation cycle, overshoot, overshoot time, it is wherein last that both have reflected the performance of pid parameter, do not need to participate in calculating, but must record.For the PID system, promptly remove differential and integral action, only keep the proportional control effect, behind T after the selected suitable sampling period, make k
pIncrease gradually from zero.Till system's step response presents lasting continuous oscillation.Write down threshold oscillation period T u.The experimental formula that provides by Z-N experience table is determined k again
p, K
i, k
dSee accompanying drawing 4, wherein δ=1/k
p, δ k=1/k
u, the K that finally obtains
i=k
p/ T
i, k
d=k
p* T
dThis be the simplest pid from setting mode, also have fuzzy in addition from mode such as adjusting, do not do herein and give unnecessary details.
In one embodiment, data memory module 304 performance data, analytic process and the result that will at every turn receive is stored in this locality with report form.The alleged form of the present invention comprises waveform chart and form, and the actual operation parameters of the tested equipment 100 of oscillogram table record wherein is as the motor speed time curve, as accompanying drawing 5.The data that charting receives and sends are also made performance comparison, and are as shown in the table:
| Time | Device type | Require analytical form | Real data | Calculate data | Performance data | Performance and last secondary data changes in contrast |
| 2008.4.15 11:22 | Stirring machine | Fuzzy is from adjusting | Speed 1520, percentage speed variation 15 | K p：1.2 K i：0.6 K d：0.8 | Overshoot 350, overshoot time 1ms | / |
| 2008.4.15 11:24 | Stirring machine | Fuzzy is from adjusting | Speed 1510, percentage speed variation 10 | K p：1.1 K i：0.7 K d：0.9 | Overshoot 220, overshoot time 1.2s | Overshoot reduces 130, and the overshoot time increases 0.2ms, performance assessment optimization 1% |
| 2008.4.15 | Stirring machine | The Z-N method | Speed | K p：1.3 | Overshoot | Overshoot increases |
| 11:26 | PID is from adjusting | 1540, percentage speed variation 40 | K i：1.1 K d：0.7 | 400 overshoot time 1.4s | 180, the overshoot time increases 0.2s, performance assessment optimization-10% |
Statistics contrast module 305 links to each other with data memory module 304, is used for each time operational factor is compared, and the judgement optimal operating parameter.In one embodiment, statistics contrast module 305 reflects each secondary data with graph mode or X-Y plane curve mode, compares and judges which kind of operational factor is more excellent according to rule.PID is that overshoot increases by 130 from the test result of adjusting as the first time, and the overshoot time increases 0.2ms, and then performance parameter relatively is k
1* 130+k
2* (0.2), k
1And k
2Be the rule of user oneself definition, can be the overshoot time optimization, also can be the overshoot principle of optimality, the performance of calculating this secondary data and last secondary data according to this rule is to rise or descend.
Fig. 3 shows the method flow that carries out testing of equipment among the present invention, and this method flow is based on Fig. 1, system architecture shown in Figure 2, and detailed process is as follows:
In step S301, tested equipment 100 is sent to Wireless Telecom Equipment 200 with its performance data that collects in operational process.The data that these performance datas obtain when being 100 operations of tested equipment: if variable-frequency motor then is data such as line current, voltage, speed, magnetic flux; If stirring machine, generally have only the data that speed and rate of change thereof, overshoot and overshoot time etc. can record.The types that the Frame of performance data can the indicating equipment type, need test etc., in one embodiment, Frame comprises a test coding, is made up of at least three parts, that is: device type frame, analysis type frame and test data section.
In above-mentioned steps, the present invention can gather these performance datas by sensor, for example Hall element or other speed pickup etc.If tested equipment 100 stirring machines when by Hall element or other speed pickup sample rate value, are observed these velocity amplitudes and rate of change thereof, time, can obtain motor speed, rate of change, overshoot, this class parameter of overshoot time.If variable-frequency washing machine can adopt Hall element sampling motor speed, Current Transformer sample rate current, voltage obtain easily from line voltage.
In step S302, Wireless Telecom Equipment 200 is transmitted to data processing equipment 300 by wireless transmission method with described performance data.In one embodiment, wireless transmission method comprises Bluetooth transmission, Infrared Transmission, ZigBee or common 2.4G wireless transmission etc.Wherein the applications distances of bluetooth is near excessively, therefore generally can use as ZigBee or common 2.4G wireless transmission, and applications distances is distant, such as the tested equipment 100 that can detect and debug in office outside tens meters.
In step S303,300 pairs of described performance datas of data processing equipment are analyzed, and obtain preserving when time operational factor and in this locality.In the present invention, data processing equipment 300 adopts genetic algorithm or by neural network described performance data is analyzed.This step specifically comprises: (1) data processing equipment 300 according to the data layout identification equipment type that receives, require the function analyzed, as pid parameter obtain, motor internal parameter acquiring etc.; (2) actual parameter that obtains is used as variable and is joined pid parameter in setting procedure or parameter recognition program, calculate the pid parameter or the motor internal parameter of needs according to the rule (best performance, time optimal etc.) of user's needs; (3) keeping records comprises the current time, comes the data of self-testing device, the findings data that computing draws etc., and sends to tested equipment 100 and be used for next time debugging.
About concrete algorithm in the step (2), be example with PID from adjusting, adopt the simplest Z-N method PID from adjusting.In the data layout that receives: device type is a stirring machine, analytical approach is that Z-N method PID is from adjusting, real data is speed, percentage speed variation, threshold oscillation cycle, overshoot, overshoot time, it is wherein last that both have reflected the performance of pid parameter, do not need to participate in calculating, but must record.For the PID system, promptly remove differential and integral action, only keep the proportional control effect, behind T after the selected suitable sampling period, make k
pIncrease gradually from zero.Till system's step response presents lasting continuous oscillation.Write down threshold oscillation period T u.The experimental formula that provides by Z-N experience table is determined k again
p, K
i, k
dSee accompanying drawing 4, wherein δ=1/k
p, δ k=1/k
u, the K that finally obtains
i=k
p/ T
i, k
d=k
p* T
dThis be the simplest pid from setting mode, also have fuzzy in addition from mode such as adjusting, do not do herein and give unnecessary details.
In one embodiment, data processing equipment 300 performance data, analytic process and the result that will at every turn receive is stored in this locality with report form.The alleged form of the present invention comprises waveform chart and form, and the actual operation parameters of the tested equipment 100 of oscillogram table record wherein is as the motor speed time curve, as accompanying drawing 5.The data that charting receives and sends are also made performance comparison, and are as shown in the table:
| Time | Device type | Require analytical form | Real data | Calculate data | Performance data | Performance and last secondary data changes in contrast |
| 2008.4.15 11:22 | Stirring machine | Fuzzy is from adjusting | Speed 1520, percentage speed variation 15 | K p：1.2 K i：0.6 K d：0.8 | Overshoot 350, overshoot time 1ms | / |
| 2008.4.15 | Stirring machine | Fuzzy | Speed | K p：1.1 | Overshoot | Overshoot reduces |
| .11:24 | PID is from adjusting | 1510, percentage speed variation 10 | K i：0.7 K d：0.9 | 220, overshoot time 1.2s | 130, the overshoot time increases 0.2ms, performance assessment optimization 1% | |
| 2008.4.15 11:26 | Stirring machine | Z-N method PID is from adjusting | Speed 1540, percentage speed variation 40 | K p：1.3 K i：1.1 K d：0.7 | 400 overshoot time of overshoot 1.4s | Overshoot increases by 180, and the overshoot time increases 0.2s, performance assessment optimization-10% |
In step S304, Wireless Telecom Equipment 200 feeds back to tested equipment 100 by wireless transmission method with the described time operational factor of working as, and repeated execution of steps S301 to S303.
In step S305,300 pairs of operational factors each time of data processing equipment compare, and judge the optimal operating parameter of described tested equipment 100.In one embodiment, statistics contrast module 305 reflects each secondary data with graph mode or X-Y plane curve mode, compares and judges which kind of operational factor is more excellent according to rule.PID is that overshoot increases by 130 from the test result of adjusting as the first time, and the overshoot time increases 0.2ms, and then performance parameter relatively is k
1* 130+k
2* (0.2), k
1And k
2Be the rule of user oneself definition, can be the overshoot time optimization, also can be the overshoot principle of optimality, the performance of calculating this secondary data and last secondary data according to this rule is to rise or descend.
According to the above as can be known, the present invention obtains reliable pid parameter or device parameter model fast by the powerful performance of PC, and the performance of single-chip microcomputer itself is not enough to do too complicated analysis, can be partially slowly during as the speed of adjusting certainly of calculation of complex, and inefficiency.Wireless mode then makes test macro be easy to management, equipment can be placed on special test environment under to test and the developer still can monitor this system works situation.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of device test system, comprise tested equipment, data processing equipment, it is characterized in that, also comprise the Wireless Telecom Equipment that carries out data interaction respectively with wireless mode with described tested equipment and data processing equipment, it receives the performance data that tested equipment is gathered in operational process, and is forwarded to data processing equipment and carries out data analysis.
2, device test system according to claim 1 is characterized in that, described tested equipment further comprises data acquisition module, reaches the communication interface that is complementary with described Wireless Telecom Equipment;
The tested equipment of described data collecting module collected is in the performance data in when operation, and described performance data is sent to Wireless Telecom Equipment by communication interface according to communication protocol.
3, device test system according to claim 1 is characterized in that, described Wireless Telecom Equipment further comprises radio receiving transmitting module, data processing module and communication interface;
The performance data that described radio receiving transmitting module is used for tested equipment is sent is imported data processing module;
Described data processing module carries out data qualification and data processing to described performance data;
Described communication interface is used to set up communicating to connect between tested equipment and described data processing module.
4, device test system according to claim 3 is characterized in that, described radio receiving transmitting module is a radio-frequency antenna, and described data processing module is a microcontroller.
5, device test system according to claim 1 is characterized in that, described data processing equipment further comprises radio receiving transmitting module, data conversion module, parameter calculating module, data memory module and statistics contrast module;
Described radio receiving transmitting module and Wireless Telecom Equipment carry out data interaction, comprise receiving the performance data that tested equipment repeatedly sends, and the operational factor each time that calculates of feedback data treatment facility, and the feedback optimal operating parameter;
Described data conversion module is used for the data that radio receiving transmitting module receives or sends are changed;
Described parameter calculating module is used for analyzing according to the performance data that receives, and calculates operational factor each time;
The described operational factor each time of described data memory module storage;
Described statistics contrast module links to each other with data memory module, is used for described performance data and corresponding operational factor each time compared, and judges optimal operating parameter.
6, a kind ofly carry out the method for testing of equipment, it is characterized in that, said method comprising the steps of according to the described system of claim 1:
A. tested equipment is sent to Wireless Telecom Equipment with the performance data that it collects in operational process;
B. Wireless Telecom Equipment is transmitted to data processing equipment by wireless transmission method with described performance data;
C. data processing equipment is analyzed described performance data, obtains preserving when time operational factor and in this locality;
D. Wireless Telecom Equipment feeds back to tested equipment by wireless transmission method with the described time operational factor of working as, and repeats steps A to C;
E. data processing equipment compares each time operational factor, and judges the optimal operating parameter of described tested equipment.
7, apparatus testing method according to claim 6 is characterized in that, the Frame of performance data comprises the test coding in the described steps A, and described test coding comprises device type frame, analysis type frame and test data section.
8, apparatus testing method according to claim 6 is characterized in that, the wireless transmission method among the described step B comprises Bluetooth transmission, Infrared Transmission, the transmission of purple honeybee.
9, apparatus testing method according to claim 6, it is characterized in that, among the described step C, data processing equipment adopts Kalman filtering that described performance data is carried out Filtering Processing, and utilizes genetic algorithm or by neural network described performance data is analyzed.
10, apparatus testing method according to claim 6 is characterized in that, in the described step e, data processing equipment is with graph mode or X-Y plane curve mode reflection performance data and corresponding operational factor each time, and compares.
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| CN2008100669208A CN101275987B (en) | 2008-04-28 | 2008-04-28 | Equipment test system and method |
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| CN102073290A (en) * | 2010-12-13 | 2011-05-25 | 宋四海 | Zigbee protocol based proportion integration differentiation (PID) parameter tuning controller |
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| CN101902769B (en) * | 2010-07-06 | 2014-12-10 | 中兴通讯股份有限公司 | Single board wireless debugging method and device |
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| CN102073290B (en) * | 2010-12-13 | 2013-03-13 | 宋四海 | Zigbee protocol based proportion integration differentiation (PID) parameter tuning controller |
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| CN104569653A (en) * | 2014-12-04 | 2015-04-29 | 深圳市金溢科技股份有限公司 | Automatic test system for password cards |
| CN105301495A (en) * | 2015-10-23 | 2016-02-03 | 常州大学怀德学院 | Wireless detection and fault diagnosis device for motor assembly line |
| CN110618396A (en) * | 2019-09-20 | 2019-12-27 | 国网浙江省电力有限公司电力科学研究院 | Electric meter verification method based on Bluetooth transmission |
| CN110618396B (en) * | 2019-09-20 | 2022-01-21 | 国网浙江省电力有限公司营销服务中心 | Electric meter verification method based on Bluetooth transmission |
| CN113253011A (en) * | 2020-01-28 | 2021-08-13 | 罗德施瓦兹两合股份有限公司 | Signal analysis method and test system |
| CN113253011B (en) * | 2020-01-28 | 2024-02-27 | 罗德施瓦兹两合股份有限公司 | Signal analysis method and test system |
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