CN108872923A - It is a kind of to take control card table interaction fault diagnostic system - Google Patents
It is a kind of to take control card table interaction fault diagnostic system Download PDFInfo
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- CN108872923A CN108872923A CN201810594647.XA CN201810594647A CN108872923A CN 108872923 A CN108872923 A CN 108872923A CN 201810594647 A CN201810594647 A CN 201810594647A CN 108872923 A CN108872923 A CN 108872923A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
Take control card table interaction fault diagnostic system the invention discloses a kind of, belongs to electricity consumption applied technical field, including：Sensing device, for acquiring interactive radiofrequency signal；Signal processing apparatus is converted to real-time radio frequency digital signal for that will interact radiofrequency signal；And Mishap Database, for storing the matching characteristic and Fault Diagnosis Strategy of various normal or abnormal rf digital signals；Central processing unit, for extracting the real-time matching feature of the real-time radio frequency digital signal, the real-time matching feature is matched with the matching characteristic of the Mishap Database, Fault Diagnosis Strategy corresponding with the rf digital signal in the Mishap Database of the real-time matching characteristic matching is fed back into user.It is provided by the present invention to take control card table interaction fault diagnostic system, reason can be diagnosed fault from the data plane for taking control card table interactive signal, and do not need user's professional knowledge with higher, help to reduce the technical requirements to maintenance personnel.
Description
Technical field
The invention belongs to electricity consumption applied technical field more particularly to it is a kind of take control card table interaction fault diagnostic system.
Background technique
With the popularization and use for taking control intelligent electric energy meter, take control intelligent electric meter and power purchase matched with expense control intelligent electric energy meter
IC card can provide real-time power information data for power consumer etc., and local charge control mode is solving tariff recovery hardly possible, communication network
Good effect is obtained on the problems such as payment of under-developed area is supplemented with money.But local charge control mode is in actual operation, key peace
The control of full specification and Data Exchange Standard, data interaction is executed by ammeter program, opens an account and sale of electricity data are by sale of electricity software
Or manufacturer terminal is designed and developed, the foundation of data file and the update of key data are responsible for by Utilities Electric Co. of each province of chip manufacturer.
Each side understands the details of data interaction and measuring means is different, be easy to cause local charge control data in whole life cycle
Occur information exchange in management to report an error.
Currently, taking control card table on-site installation and maintenance personnel in terms of fault diagnosis, visual examination, standard card are only resided within
Table replacement test lacks to the detection means for taking control card table interaction data.In addition, former to control card table progress is taken in signal level
Barrier diagnosis, needs higher professional knowledge, technical threshold with higher, field maintenance person is generally unable to reach.Therefore, one
Denier user terminal takes control card table and breaks down, frequently with the mode integrally replaced, waste of resource.In addition, due to can not positioning failure
Basic reason can not provide amendment reference for card table design defect.Take control card table interaction fault Diagnostic Strategy system, it can be from letter
Failure card table is diagnosed in number level, and reduces the technical requirements to maintenance personnel, field failure is improved and solves efficiency, mention
Customer satisfaction is risen, the wasting of resources is reduced, foundation is provided for the design upgrading of card table, there is significant economic benefit and society's effect
Benefit.
Summary of the invention
Take control card table interaction fault diagnostic system the purpose of the present invention is to provide a kind of, solving field maintenance person can not
The problem of diagnosing fault reason from the data plane for taking control card table.
To achieve the above object, the present invention provides it is a kind of take control card table interaction fault diagnostic system, including：
Sensing device takes between control intelligent electric energy meter and power purchase IC card matched with expense control intelligent electric energy meter for acquiring
Interaction radiofrequency signal；
Signal processing apparatus, for the interactive radiofrequency signal to be converted to real-time radio frequency digital signal；
Mishap Database, for storing the matching characteristic of various normal or abnormal interaction rf digital signals and various
The corresponding Fault Diagnosis Strategy of the normal or abnormal interactive rf digital signal；And
Central processing unit, for extracting the real-time matching feature of the real-time radio frequency digital signal, by described real-time
It is matched with feature with the matching characteristic of the Mishap Database, by the number of faults with the real-time matching characteristic matching
User is fed back to according to the corresponding Fault Diagnosis Strategy of the interactive rf digital signal in library.
Further, the matching characteristic and real-time matching feature include：Temporal signatures, frequency domain character and message letter
Breath.
Further, the Fault Diagnosis Strategy includes：The corresponding time domain of various normal interactive rf digital signals is special
Sign, frequency domain character, message information and feedback information and the various abnormal corresponding temporal signatures of interaction rf digital signal, frequency domain
Feature, item of information, causes abnormal corresponding possible cause, corresponding further verifying means and corresponding event at message information
Hinder solution.
Further, the temporal signatures include：The power-on time of signal, power on the stable time, overshoot, modulation depth,
Duty ratio, fiducial time, interresponse time and lower electric time.
Further, the frequency domain character includes：The centre frequency of signal, bandwidth, neighboring trace leakage, phase noise, power,
Scattered power and spuious.
Further, the message information includes：Message data itself, take the control table number of card table, card number, key state and
Power purchase number.
Further, the sensing device is magnetic coupling coil；The magnetic coupling coil, which has, interacts radio frequency letter with described
Number the matched resonance frequency of frequency, the impedance that matches with the input terminal of the signal processing apparatus and with the power purchase IC card
Matched physical size.
Further, the signal processing apparatus includes signal conditioner and the base band mould connecting with the signal conditioner
Analog-to-digital conversion apparatus.
Further, the central processing unit is built-in PC.
Compared with prior art, the present invention has the advantages that：It is provided by the present invention to take control card table interaction event
Hinder diagnostic system, is penetrated by the interaction between access fee control intelligent electric energy meter and power purchase IC card matched with expense control intelligent electric energy meter
Frequency signal, signal simultaneously can control card table from taking by the cooperation of signal processing apparatus, central processing unit and Mishap Database processing
The data plane of interactive signal diagnoses fault reason, and does not need user's professional knowledge with higher, facilitates reduction pair
The technical requirements of maintenance personnel are improved customer satisfaction so that improving field failure solves efficiency, have significant economic benefit
And social benefit.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical solution of the present invention
It is briefly described, it should be apparent that, the accompanying drawings in the following description is only one embodiment of the present of invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of system block diagram of expense control card table interaction fault diagnostic system of the present invention；
Wherein：10- sensing device, 20- signal processing apparatus, 201- signal conditioner, 202- base band analog-digital commutator,
30- central processing unit.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the present invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's every other embodiment obtained without creative labor,
It shall fall within the protection scope of the present invention.
As shown in Figure 1, expense control card table interaction fault diagnostic system provided by the present invention includes：Sensing device 10, signal
Processing unit 20 and central processing unit 30, sensing device 10 are connect with the input terminal of signal processing apparatus 20.Sensing device 10
Interaction radiofrequency signal for reception fee control intelligent electric energy meter between power purchase IC card matched with control intelligent electric energy meter is taken, according to
The working frequency of contactless IC card and expense control intelligent electric energy meter now on the market is 13.56MHz, therefore sensing device 10 selects
Working frequency is the magnetic coupling coil of 13.56MHz, meets ISO14443A standard, and magnetic coupling coil is non-closed magnetic coupling
Coil, non-closed place are located at the centre of magnetic coupling coil, and the size at non-closed place is matched with the physical size of power purchase IC card,
One end of the magnetic coupling coil of 13.56MHz is connect with the input terminal of signal processing apparatus 20；The magnetic coupling line of 13.56MHz simultaneously
Enclosing has and takes the interaction radio frequency signal frequency between control intelligent electric energy meter and power purchase IC card matched with expense control intelligent electric energy meter
Matched resonance frequency can make the voltage at magnetic coupling coil both ends reach maximum, keep received interactive radiofrequency signal more acurrate；
The magnetic coupling coil of 13.56MHz also has the impedance to match with the input terminal of signal processing apparatus 20, is to reduce interaction and penetrating
Frequency signal is equivalent to the loss for reducing interaction radiofrequency signal in the reflection of the input terminal with signal processing apparatus 20, makes output
Interaction radiofrequency signal is more acurrate.Magnetic coupling coil is connect with power purchase IC card when use.
With further reference to Fig. 1, signal processing apparatus 20 includes signal conditioner 201 and the output with signal conditioner 201
The base band analog-digital commutator 202 of connection is held, the input terminal of signal conditioner 201 is connect with magnetic coupling coil, and base band modulus turns
The output end of changing device 202 is connect with central processing unit 30.Signal conditioner 201 is bandpass filter, base band analog-to-digital conversion
Device 202 uses the modulus conversion chip that resolution ratio is 120MHz for 16, sample rate, and modulus conversion chip is by 32 bit DSP cores
Piece control.Bandpass filter is sent to base band analog-digital commutator after filtering the interaction radiofrequency signal that magnetic coupling coil acquires
202, base band analog-digital commutator 202 sends the signal processing received at real-time radio frequency digital signal.
Further refer to Fig. 1, central processing unit 30 connect with signal processing apparatus 20, i.e., central processing unit 30 and
Base band analog-digital commutator 202 connects.Central processing unit 30 is built-in PC, and built-in PC is equipped with DMAC, and built-in PC makes
Operating system is Linux, and Mishap Database is stored in built-in PC, and Mishap Database uses MySQL relational data
Library.Mishap Database is used to store temporal signatures, frequency domain character and the report of various normal or abnormal interaction rf digital signals
Literary information and the various normal or abnormal corresponding Fault Diagnosis Strategies of interaction rf digital signal.
Fault Diagnosis Strategy includes：The corresponding temporal signatures of various normal interactive rf digital signals, frequency domain character, report
Literary information and feedback information and the corresponding abnormal temporal signatures of various abnormal interaction rf digital signals, abnormal frequency domain character,
Exception information item causes abnormal corresponding possible cause, corresponding further verifying means and corresponding failure solution.
Message information includes the table number, card number, key state and power purchase number of message data itself, expense control card table.Message
The abnormality of information includes that the table number, card number, family number of expense control card table do not correspond to；Retrography file is not reset；Card file is abnormal；
Centre frequency is abnormal；Ammeter underpower；Card authentification failure；Enough electricity frequency abnormalities；Message data exception and protocol stack error.
Take control card table for expense control intelligent electric energy meter and power purchase IC card matched with expense control intelligent electric energy meter.
Central processing unit 30 is used to extract the real-time matching feature of real-time radio frequency digital signal, by real-time matching feature with
The matching characteristic of Mishap Database is matched, by with the interaction radio frequency in Mishap Database similar in real-time matching characteristic matching
The corresponding Fault Diagnosis Strategy of digital signal feeds back to user.
Matching characteristic and real-time matching feature include：Temporal signatures, frequency domain character and message information.Temporal signatures packet
It includes：The power-on time of signal, power on the stable time, overshoot, modulation depth, duty ratio, fiducial time, interresponse time and under
The electric time.Frequency domain character includes：The centre frequency of signal, bandwidth, neighboring trace leakage, phase noise, power, scattered power and miscellaneous
It dissipates.The performance of the information of temporal signatures and frequency domain character is numerical value.
Process similar in the matching of the matching characteristic of real-time matching feature and Mishap Database is：Temporal signatures and frequency domain are special
Sign matching is close, is to find the numerical value of the real-time temporal signatures and frequency domain character corresponding exception section in Mishap Database.
By taking overshoot depth as an example, it is assumed that the overshoot depth in Mishap Database only has three records：0.7%, 0.8% and 1.3%, and it is real
When measured value be 1%；If 0.8% is normal recordings, 1.3% is exception record, then 1% close record is 1.3% note
Record；If 0.8% and 1.3% is all exception record, then two be all 1% close record, close record is then matched to
Information.Message information matching is close, is identical record in trouble-shooting database, if identical record is not present, just seeks
Information consistent in length in long message, consistent most record then information to be matched in message.
The workflow for taking control card table interaction fault diagnostic system to the present invention is described in detail, so that art technology
Personnel know more about the present invention：
The interaction radiofrequency signal of expense control card table enters expense control card table interaction fault diagnostic system by magnetic coupling coil, successively
By bandpass filter and base band analog-digital commutator 202, take the interaction radiofrequency signal of control card table by modulus conversion chip mould
The digital signals that are converted to of number are sent into 32 bit DSP chips and carry out further Digital Signal Processing, and dsp chip is by the number of processing
According to being stored in DMAC；Built-in PC obtains data from DMAC, carries out time domain to data, frequency-domain analysis obtains feature, logarithm
According to being demodulated, decode acquisition message；
Part time domain, the frequency domain character such as the following table 1 extracted
Table 1：
The segment message information such as the following table 2 extracted
Table 2：
Built-in PC retrieves resulting real-time time-domain feature, frequency domain character and message information in Mishap Database
Similar temporal signatures, frequency domain character and message information are matched, obtaining Fault Diagnosis Strategy after matching is：Intelligent electric meter is normal,
CRC check is abnormal in power purchase IC card returned packet ATQA, and operation flow is caused to can not be successfully progress；Possible cause goes out for protocol stack
It is wrong；Solution is to reinitialize power purchase IC card.User can reinitialize power purchase IC card according to Fault Diagnosis Strategy, from
And it solves to take control card table interaction fault.
As stated above, provided to take control card table interaction fault diagnostic system, the signal of expense control card table interaction can be obtained,
Can break failure cause from the data and Information Level facial diagnosis of signal, do not need user's professional knowledge with higher, help to drop
The low technical requirements to maintenance personnel so that improving field failure solves efficiency, while reducing whole replacement user terminal expense control
The maintenance mode of card table reduces the wasting of resources.
Above disclosed is only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation or modification,
It is covered by the protection scope of the present invention.
Claims (9)
1. a kind of take control card table interaction fault diagnostic system, it is characterised in that：Including：
Sensing device, for acquiring the interaction taken between control intelligent electric energy meter and power purchase IC card matched with expense control intelligent electric energy meter
Radiofrequency signal；
Signal processing apparatus, for the interactive radiofrequency signal to be converted to real-time radio frequency digital signal；
Mishap Database, for storing the matching characteristic of various normal or abnormal interaction rf digital signals and various normal
Or the corresponding Fault Diagnosis Strategy of the abnormal interactive rf digital signal；And
Central processing unit, it is for extracting the real-time matching feature of the real-time radio frequency digital signal, the real-time matching is special
Sign is matched with the matching characteristic of the Mishap Database, by the Mishap Database with the real-time matching characteristic matching
In the corresponding Fault Diagnosis Strategy of the interactive rf digital signal feed back to user.
2. according to claim 1 take control card table interaction fault diagnostic system, it is characterised in that：The matching characteristic and reality
When matching characteristic include：Temporal signatures, frequency domain character and message information.
3. according to claim 1 take control card table interaction fault diagnostic system, it is characterised in that：The Fault Diagnosis Strategy
Including：The corresponding temporal signatures of various normal interactive rf digital signals, frequency domain character, message information and feedback information and each
Kind abnormal interaction rf digital signal corresponding temporal signatures, message information, item of information, cause abnormal pair at frequency domain character
Possible cause, corresponding further verifying means and the corresponding failure solution answered.
4. according to claim 2 or 3 take control card table interaction fault diagnostic system, it is characterised in that：The temporal signatures
Including：The power-on time of signal, power on the stable time, overshoot, modulation depth, duty ratio, fiducial time, interresponse time and
The lower electricity time.
5. according to claim 2 or 3 take control card table interaction fault diagnostic system, it is characterised in that：The frequency domain character
Including：The centre frequency of signal, bandwidth, neighboring trace leakage, phase noise, power, scattered power and spuious.
6. according to claim 2 or 3 take control card table interaction fault diagnostic system, it is characterised in that：The message information
Including：Message data itself, table number, card number, key state and the power purchase number for taking control card table.
7. according to claim 1 take control card table interaction fault diagnostic system, it is characterised in that：The sensing device is magnetic
Coupling coil；The magnetic coupling coil has and the matched resonance frequency of the frequency for interacting radiofrequency signal and the signal
Impedance that the input terminal of processing unit matches and with the matched physical size of power purchase IC card.
8. according to claim 1 take control card table interaction fault diagnostic system, it is characterised in that：The signal processing apparatus
Including signal conditioner and the base band analog-digital commutator being connect with the signal conditioner.
9. according to claim 1 take control card table interaction fault diagnostic system, it is characterised in that：The central processing unit
For built-in PC.
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| CN201810594647.XA CN108872923B (en) | 2018-06-11 | 2018-06-11 | It is a kind of to take control card table interaction fault diagnostic system |
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|---|---|---|---|
| CN201810594647.XA CN108872923B (en) | 2018-06-11 | 2018-06-11 | It is a kind of to take control card table interaction fault diagnostic system |
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| CN108872923B CN108872923B (en) | 2019-09-10 |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1267870A (en) * | 1998-03-12 | 2000-09-27 | 关宏 | Intelligent network water, electric and gas meter charging and managing system |
| EP2425301B1 (en) * | 2009-04-30 | 2015-03-04 | Israel Aerospace Industries Ltd. | Relative time measurement system with nanosecond level accuracy |
| CN105574999A (en) * | 2015-12-16 | 2016-05-11 | 国家电网公司 | Electricity vending function testing method for local cost-control intelligent electric energy meter |
| CN205228561U (en) * | 2015-11-23 | 2016-05-11 | 江苏中科君达物联网股份有限公司 | Intelligence prepayment radio -frequency card water gauge |
| CN205450246U (en) * | 2015-12-21 | 2016-08-10 | 国网四川省电力公司电力科学研究院 | Portable smart electric meter supplements fault detection device with money |
| CN106093832A (en) * | 2016-05-27 | 2016-11-09 | 南方电网科学研究院有限责任公司 | Account opening function test method and system for charge control electric energy meter |
| CN106228098A (en) * | 2016-07-12 | 2016-12-14 | 华立科技股份有限公司 | Electric energy meter radio-frequency module low-power consumption inspection X 2 method |
| CN206039701U (en) * | 2016-08-31 | 2017-03-22 | 四川海力智能科技股份有限公司 | Data communication system of IC -card table |
| CN106781057A (en) * | 2017-01-17 | 2017-05-31 | 国网四川省电力公司成都供电公司 | Intelligent electric energy meter supplements the method that fault detection system and detection process supplement failure with money with money |
| CN206710505U (en) * | 2017-05-23 | 2017-12-05 | 夏国庆 | A kind of power utility check handheld terminal based on NFC function |
| CN107831363A (en) * | 2017-12-05 | 2018-03-23 | 广西电网有限责任公司电力科学研究院 | A kind of acquisition system and acquisition methods for taking control card table interaction data and sequential |
| CN207148927U (en) * | 2017-08-21 | 2018-03-27 | 国家电网公司 | A kind of electric power equipment inspection system based on mobile interchange technology |
-
2018
- 2018-06-11 CN CN201810594647.XA patent/CN108872923B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1267870A (en) * | 1998-03-12 | 2000-09-27 | 关宏 | Intelligent network water, electric and gas meter charging and managing system |
| EP2425301B1 (en) * | 2009-04-30 | 2015-03-04 | Israel Aerospace Industries Ltd. | Relative time measurement system with nanosecond level accuracy |
| CN205228561U (en) * | 2015-11-23 | 2016-05-11 | 江苏中科君达物联网股份有限公司 | Intelligence prepayment radio -frequency card water gauge |
| CN105574999A (en) * | 2015-12-16 | 2016-05-11 | 国家电网公司 | Electricity vending function testing method for local cost-control intelligent electric energy meter |
| CN205450246U (en) * | 2015-12-21 | 2016-08-10 | 国网四川省电力公司电力科学研究院 | Portable smart electric meter supplements fault detection device with money |
| CN106093832A (en) * | 2016-05-27 | 2016-11-09 | 南方电网科学研究院有限责任公司 | Account opening function test method and system for charge control electric energy meter |
| CN106228098A (en) * | 2016-07-12 | 2016-12-14 | 华立科技股份有限公司 | Electric energy meter radio-frequency module low-power consumption inspection X 2 method |
| CN206039701U (en) * | 2016-08-31 | 2017-03-22 | 四川海力智能科技股份有限公司 | Data communication system of IC -card table |
| CN106781057A (en) * | 2017-01-17 | 2017-05-31 | 国网四川省电力公司成都供电公司 | Intelligent electric energy meter supplements the method that fault detection system and detection process supplement failure with money with money |
| CN206710505U (en) * | 2017-05-23 | 2017-12-05 | 夏国庆 | A kind of power utility check handheld terminal based on NFC function |
| CN207148927U (en) * | 2017-08-21 | 2018-03-27 | 国家电网公司 | A kind of electric power equipment inspection system based on mobile interchange technology |
| CN107831363A (en) * | 2017-12-05 | 2018-03-23 | 广西电网有限责任公司电力科学研究院 | A kind of acquisition system and acquisition methods for taking control card table interaction data and sequential |
Non-Patent Citations (2)
| Title |
|---|
| 李晓斌 等: "智能电能表费控功能检测异常分析", 《山西电力》 * |
| 陶鹏 等: "本地费控智能电能表的特点及参数设置分析", 《河北电力技术》 * |
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| CN108872923B (en) | 2019-09-10 |
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