CN116736000A - Charging pile verification circuit and charging pile verification method - Google Patents
Charging pile verification circuit and charging pile verification method Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
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- G—PHYSICS
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- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
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- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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- Y02T10/00—Road transport of goods or passengers
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02T10/00—Road transport of goods or passengers
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- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The application is applicable to the technical field of electronic circuits, and provides a charging pile verification circuit and a charging pile verification method, wherein the charging pile verification circuit comprises the following steps: the first acquisition module is used for acquiring standard active power energy data in the charging process of the charging pile; the second acquisition module is used for acquiring external active power data after the charging pile is charged; the positioning module is used for acquiring geographic position data of the charging pile; the data processing module is used for preprocessing the standard active power data to obtain first preprocessed data, preprocessing the external active power data to obtain second preprocessed data and preprocessing the geographic position data to obtain third preprocessed data; the communication module is used for sending the first preprocessing data, the second preprocessing data and the third preprocessing data to the remote background system, so that the remote background system can verify the charging pile according to the first preprocessing data, the second preprocessing data and the third preprocessing data, and a verification result is generated. The application can improve the efficiency and accuracy of charging pile verification.
Description
Technical Field
The application belongs to the technical field of electronic circuits, and particularly relates to a charging pile verification circuit and a charging pile verification method.
Background
With the popularization of electric vehicles, the number of charging piles is also increasing, at present, the charging piles are already listed in a metering appliance catalog of forced verification regulated in the aspect of market supervision, the forced verification must be accepted in the use process, and verification work of the charging piles must be completed by units and professionals with verification qualification, otherwise, legitimacy is not acknowledged.
However, because the number of the charging piles is huge, and the position distribution is relatively scattered, units and professionals with verification qualification are quite limited, so that verification work of the charging piles is difficult to be effectively unfolded. Therefore, in order to improve the verification efficiency, in the verification working process, the work with low qualification requirements such as installation of verification equipment and collection of verification data can be delegated to personnel not engaged in verification authentication, and the work of data screening and authentication is carried out by professional personnel with verification qualification, so that the verification working efficiency is effectively improved, but in this way, the data uncertainty is greatly increased due to various human factors, for example, the electric power data in the data collection process is artificially tampered, or the charging pile receiving verification is inconsistent with the pre-designated charging pile to be verified. Therefore, a set of more reasonable verification schemes are required to be formulated so as to complete efficient and accurate verification of the charging pile.
Disclosure of Invention
In view of the above, the embodiment of the application provides a charging pile verification circuit and a charging pile verification method, which are used for solving the technical problems that the existing charging pile is low in verification efficiency and verification data are easy to tamper so as to influence verification accuracy.
In a first aspect, there is provided a charging post verification circuit, the circuit comprising:
the first acquisition module is used for acquiring standard active power energy data in the charging process of the charging pile;
the second acquisition module is used for acquiring external active electric energy data after the charging of the charging pile is finished;
the positioning module is used for acquiring geographic position data of the charging pile;
the data processing module is respectively connected with the first acquisition module, the second acquisition module, the positioning module and the communication module, and is used for preprocessing the standard active power data to obtain first preprocessing data, preprocessing the external active power data to obtain second preprocessing data, and preprocessing the geographic position data to obtain third preprocessing data;
the communication module is in communication connection with the remote background system and is used for sending the first preprocessing data, the second preprocessing data and the third preprocessing data to the remote background system, so that the remote background system can verify the charging pile according to the first preprocessing data, the second preprocessing data and the third preprocessing data to generate verification results.
In a possible implementation manner of the first aspect, the charging pile verification circuit further includes:
the charging cable is connected between the first socket and the second socket;
the first socket is used for connecting the power supply end of the charging pile;
and the second socket is used for connecting with the charging end of the target charging object.
In a possible implementation manner of the first aspect, the first obtaining module includes:
the current acquisition unit is used for acquiring current signals in the charging process of the charging pile;
the voltage acquisition unit is used for acquiring voltage signals in the charging process of the charging pile;
the data conversion unit is respectively connected with the data conversion unit and the voltage acquisition unit and is used for carrying out analog-to-digital conversion on the current signal to obtain a digital current signal, carrying out analog-to-digital conversion on the voltage signal to obtain a digital voltage signal and sending the digital current signal and the digital voltage signal to the data processing module.
In a possible implementation manner of the first aspect, the data conversion unit includes: the AD converter comprises a first AD conversion subunit, a second AD conversion subunit and a communication subunit;
The power utilization end of the AD converter is connected with the reference power supply;
a first end of the first AD conversion subunit is connected with a first end of the first resistor, a second end of the first AD conversion subunit is grounded, and a third end of the first AD conversion subunit is connected with an input end of the communication subunit;
the first end of the second AD conversion subunit is connected with the first end of the second resistor, the second end of the second AD conversion subunit is grounded, and the third end of the second AD conversion subunit is connected with the input end of the communication subunit;
the output end of the communication subunit is connected with the data processing module;
the second end of the first resistor is connected with the current acquisition unit, and the second end of the second resistor is connected with the voltage acquisition unit.
In a possible implementation manner of the first aspect, the current collecting unit includes a current transformer and a third resistor;
the current transformer is connected in series with the charging cable, a first end of the third resistor is respectively connected with the first end of the current transformer and a second end of the first resistor, and a second end of the third resistor is respectively connected with the second end of the current transformer and a second end of the first AD conversion subunit.
In a possible implementation manner of the first aspect, the voltage acquisition unit includes a fourth resistor and a fifth resistor;
the first end of the fourth resistor is connected with the first end of the charging cable and the second end of the second resistor respectively, the second end of the fourth resistor is connected with the first end of the fifth resistor and the second end of the second AD conversion subunit respectively, and the second end of the fifth resistor is connected with the second end of the charging cable.
In a possible implementation manner of the first aspect, the charging pile verification circuit further includes:
the power supply module is respectively connected with the first acquisition module, the second acquisition module, the data processing module, the positioning module and the communication module and is used for supplying power to the first acquisition module, the second acquisition module, the data processing module, the positioning module and the communication module.
In a possible implementation manner of the first aspect, the charging pile verification circuit further includes:
the display module is connected with the data processing module and used for displaying the external active power data;
and the external input module is connected with the data processing module and is used for inputting charging parameters.
In a second aspect, an embodiment of the present application provides a method for calibrating a charging pile, including:
standard active electric energy data in the charging process of the charging pile are obtained;
acquiring external active electric energy data after the charging pile is charged;
obtaining geographic position data of the charging pile;
preprocessing the standard active power data to obtain first preprocessed data, and
preprocessing the external active power data to obtain second preprocessed data, and
preprocessing the geographic position data to obtain third preprocessed data;
and sending the first preprocessing data, the second preprocessing data and the third preprocessing data to a remote background system, so that the remote background system carries out verification on the charging pile according to the first preprocessing data, the second preprocessing data and the third preprocessing data, and a verification result is generated.
In a possible implementation manner of the second aspect, the step of verifying the charging pile according to the first pre-processing data, the second pre-processing data and the third pre-processing data, and generating a verification result includes:
if the third preprocessing data accords with the preset condition and the second preprocessing data is larger than the preset threshold, calculating the electric energy error of the charging pile according to the first preprocessing data and the second preprocessing data, and generating a verification result. The charging pile verification circuit and the charging pile verification method provided by the embodiment of the application have the following beneficial effects:
The application provides a charging pile verification circuit which comprises a first acquisition module, a second acquisition module, a data processing module, a positioning module and a communication module, wherein standard active power data of a charging pile is acquired through the first acquisition module in a verification site, external active power data of the charging pile is acquired through the second acquisition module, geographic position data of the charging pile is acquired through the positioning module, the standard active power data, the external active power data and the geographic position data are preprocessed through the data processing module, and the preprocessed data are sent to a remote background system through the communication module, so that a verification result of the charging pile is obtained according to the preprocessed standard active power data and the preprocessed external active power data when the preprocessed geographic position data meet the conditions. Because the standard active power data and the external active power data cannot be edited and modified on the verification site, and whether the charging pile is a target charging pile to be detected can be judged according to the position data, the verification efficiency of the charging pile is improved through the matching of the verification site and a remote background system, and the probability that the accuracy of a verification result is influenced due to false presentation of the site verification data can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a charging pile verification circuit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a charging pile verification circuit according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a charging pile verification circuit according to another embodiment of the present application;
fig. 4 is a schematic circuit diagram of a data conversion unit in a charging pile verification circuit according to another embodiment of the present application;
fig. 5 is a schematic circuit diagram of a charging pile verification circuit according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a charging pile verification circuit according to another embodiment of the present application;
fig. 7 is a schematic structural diagram of a charging pile verification circuit according to an embodiment of the present application;
fig. 8 is a schematic step diagram of a charging pile verification method according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It should be noted that the terms used in the implementation section of the embodiment of the present application are only used to explain the specific embodiment of the present application, and are not intended to limit the present application. In the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing a relationship, meaning that there may be three relationships, e.g., a and/or B, may mean: a exists alone, A and B exist together, and B exists alone.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. The terms "comprising," including, "" having, "and variations thereof mean" including but not limited to.
Along with the popularization of electric vehicles, the number of charging piles is also increasing, the charging piles belong to metering devices for forced verification specified in the aspect of market supervision, the charging piles are required to be subjected to forced verification in the use process, and in order to ensure the authority and accuracy of verification results, the verification work of the charging piles is required to be completed by units and professionals with verification qualification.
However, the current charging pile has large amount of storage and scattered position distribution, and units and professionals with verification qualification are quite limited, so that verification work of the charging pile is difficult to be effectively unfolded. In order to improve verification efficiency, in the verification working process, for the work with low qualification requirements such as installation of verification equipment and verification data acquisition, personnel not engaged in verification authentication can be commissioned, and data screening and authentication work is carried out by professional personnel with verification qualification, so that the verification working efficiency is effectively improved, but in the mode, the data uncertainty is greatly improved due to various human factors, for example, the electric power data in the data acquisition process is artificially tampered, and the verified charging pile is inconsistent with a pre-designated charging pile to be verified. Therefore, the embodiment of the application provides a charging pile verification circuit and a charging pile verification method, which are used for solving the technical problems that the existing charging pile is low in verification efficiency and verification data are easy to tamper so as to influence verification accuracy, and enabling the verification of the charging pile to be realized efficiently and accurately.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a charging pile verification circuit according to an embodiment of the present application. As shown in fig. 1, the charging pile verification circuit 10 includes a first acquisition module 101, a second acquisition module 102, a positioning module 103, a data processing module 104, and a communication module 105.
The first obtaining module 101 is connected to the data processing module 104, and is configured to obtain standard active power data during the charging process of the charging pile 20.
The standard active power data include active power data actually consumed in the charging process of the charging pile, and the active power data can be characterized by electric parameters such as actual charging current, actual charging voltage and the like monitored in the charging process.
The second obtaining module 102 is connected to the data processing module 104, and is configured to obtain external active power data after the charging of the charging pile 20 is completed.
The external active power data includes, but is not limited to, active power data published to the outside after the charging pile 20 is charged, for example, the external active power data may be active power data displayed to the user on a display device collocated with the charging pile 20 (for example, 40kWh is consumed in the present charging), active power data displayed on a charging APP, a public code-sweeping applet and the like bound with the charging pile by the user, or active power data which is not directly displayed to the user but only summarized and stored in a charging pile management background.
The positioning module 103 is connected with the data processing module 104 and is used for acquiring the geographic position data of the charging pile 20.
Specifically, the positioning module 103 is configured to obtain the geographical position data of the charging pile 20, so that the remote background system 30 can determine, according to the geographical position data obtained by the positioning module 103, whether the currently-verified charging pile is the target verified charging pile, or whether the currently-obtained standard active power data or the externally-obtained standard active power data is detected from the target verified charging pile, that is, whether the data is real target charging pile verification data or artificially-forged verification data. Therefore, in the verification process, if the geographic position data does not meet preset conditions, for example, the geographic position information of the charging pile represented by the geographic position data is not in a preset effective geographic position range, the verification data is directly judged to be abnormal, namely verification is disqualified, so that verification efficiency is improved, and the credibility of verification results is improved.
The data processing module 104 is respectively connected with the first acquiring module 101, the second acquiring module 102, the positioning module 103 and the communication module 105, and is used for preprocessing standard active power data to obtain first preprocessed data, preprocessing external active power data to obtain second preprocessed data, and preprocessing geographic position data to obtain third preprocessed data.
The standard active power data includes parameters such as an actual charging current, an actual charging voltage, and a charging duration provided by the charging pile in the charging process, and the data processing module 104 may calculate and obtain the standard active power, that is, the first preprocessing data, according to the active power calculation rule according to the parameters such as the actual charging current, the actual charging voltage, and the charging duration. For example, for a dc charging pile, the data processing module 104 obtains, through the first obtaining module 101, a plurality of discrete sampling values of charging current and discrete sampling values of charging voltage in the charging process, and according to the foregoing discrete sampling values of charging current and discrete sampling values of charging voltage, the data processing module may calculate and obtain the discretized instantaneous active power, specifically, obtain the instantaneous active power by the following formula:
P i ＝U i *I i ，
wherein i is a sampling point, P i For the instant active power corresponding to the ith sampling point, U i For the charging voltage sampling value corresponding to the ith sampling point, I i And the charging current sampling value corresponding to the ith sampling point.
Because the electric energy is the integral of power and time, the calculation of the standard active electric energy can be performed by adopting a mode of summing the instantaneous active power points, and specifically, the standard active electric energy can be calculated by the following formula:
Wherein, ep is standard active power, n is sampling total point number, and Ts is sampling interval time.
In the above formula for calculating the standard active power, if the unit of the charging voltage U is V, the unit of the charging current is a multiple of a V, the unit of the sampling interval time Ts is s, the unit of the standard active power Ep obtained by the final calculation is watt-second (w·s), and conventionally, the power is generally in kilowatt-hour (kw·h), so if the unit of the standard active power Ep obtained by the calculation is watt-second, it is also required to be converted into kilowatt-hour, and the specific unit conversion formula is as follows:
standard active electric energy with the unit of kilowatt-hour can be obtained through the unit conversion formula.
For example, the external active power data may include power consumption data (for example, 40kWh is consumed in the current charging) displayed by the charging pile on the display device by the user after the charging obtained by shooting, and the data processing module 104 extracts key information (for example, a specific active power consumption value) in the image according to the shot image by using a preset image processing algorithm, so as to obtain second preprocessing data. In other embodiments, the external active power data may also be obtained by obtaining from a charging pile management background, obtaining from a cloud server of a charging APP bound by a charging pile, and the like, which is not limited herein.
For example, the geographic position data may include geographic position information (such as latitude and longitude information) of the current position of the charging pile, and the data processing module 104 generates the position coordinates as third preprocessing data according to the geographic position information acquired by the positioning module 103.
The communication module 105 is communicatively connected to the remote background system 30, and is configured to send the first pre-processing data, the second pre-processing data, and the third pre-processing data to the remote background system 30, so that the remote background system 30 performs verification on the charging pile 20 according to the first pre-processing data, the second pre-processing data, and the third pre-processing data, and generates a verification result.
Illustratively, the first pre-processed data is the standard active power 49kWh, the second pre-processed data is the external active power 50kWh, and the third pre-processed data is (50 DEG 52 '48' N,118 DEG 24 '20' E). The remote background system 30 firstly checks the third preprocessing data, that is, the geographic coordinates of the charging pile 20, and judges whether the geographic position coordinates thereof are within the preset effective range of the geographic coordinates of the target verification charging pile, if the geographic coordinates of the charging pile 20 are within the effective range of the geographic coordinates of the target verification charging pile, the verification error of the charging pile 20 is calculated according to the standard active electric energy and the external active electric energy, and the verification error can be calculated according to the following formula:
Wherein eta is verification error, ex is external active power, and Ep is standard active power.
In some embodiments, it may be predetermined that the assay result is acceptable when the assay error η is less than a predetermined error threshold (e.g., 2%), otherwise the assay result is unacceptable. The professional with verification qualification can manually review the verification result generated by the remote background system 30, the received first preprocessing data, the received second preprocessing data, the received third preprocessing data and the like to ensure the accuracy of the verification result, and if the verification result generated by the remote background system 30 is confirmed to be correct, the professional with verification qualification can generate a verification report with authority, thereby completing the efficient and accurate verification of the charging pile.
The charging pile verification circuit 10 provided by the application comprises a first acquisition module 101, a second acquisition module 102, a positioning module 103, a data processing module 104 and a communication module 105, wherein standard active power data of a charging pile 20 is acquired through the first acquisition module 101 in a verification site, external active power data of the charging pile 20 is acquired through the second acquisition module 102, geographic position data of the charging pile 20 is acquired through the positioning module 103, the standard active power data, the external active power data and the geographic position data are preprocessed through the data processing module 104, and the preprocessed data are sent to a remote background system 30 through the communication module 105, so that the remote background system 30 obtains a verification result of the charging pile 20 according to the preprocessed standard active power data and the preprocessed external active power data when the preprocessed geographic position data meet the conditions. Because the standard active power data and the external active power data cannot be edited and modified at the verification site, and whether the charging pile 20 is the target verification charging pile can be judged according to the position data, the verification efficiency of the charging pile is improved and the probability of influencing the accuracy of the verification result due to false presentation of the site verification data can be reduced through the matching of the verification site and the remote background system 30.
In some embodiments, referring to fig. 2, the charging post verification circuitry further includes a charging cable 106, a first receptacle 107, and a second receptacle 108.
The charging cable 106 is connected between the first socket 107 and the second socket 108; the first socket 107 is used for connecting with a power supply end of the charging pile 20; the second socket 108 is used to connect the charging end of the target charging object 40.
In this embodiment, a charging link between the charging post 20 and the target charging object 40 is constructed through the charging cable 106, the first socket 107 and the second socket 108, and the first acquisition module 101 is connected to the charging cable 106, so as to collect standard active power data (such as real-time charging current, real-time charging voltage, etc.).
In some embodiments, referring to fig. 3, the first acquisition module 101 includes a current acquisition unit 1011, a voltage acquisition unit 1012, and a data conversion unit 1013.
The current acquisition unit 1011 is connected to the data conversion unit 1013 and is used for acquiring a current signal during the charging process of the charging pile 20.
The current collecting unit 1011 may be, for example, a current transformer, a shunt, a rogowski coil, or the like, which has a current collecting capability, or a circuit structure, which is not limited herein.
The voltage acquisition unit 1012 is connected to the data conversion unit 1013, and is configured to acquire a voltage signal during the charging process of the charging pile 20.
By way of example, the voltage acquisition unit 1012 may be a voltage transformer, a voltage dividing resistor network, or other devices or circuit structures with voltage acquisition capability, which are not limited herein.
The data conversion unit 1013 is configured to convert the current signal from a current analog signal to a current digital signal, and to convert the voltage signal from a voltage analog signal to a voltage digital signal, and to transmit the current digital signal and the voltage digital signal to the data processing module 104.
Because the data processing module 104 is usually implemented by digital processing systems such as an MCU (micro controller) and a DSP (digital signal processing system), and the digital signal has the advantages of strong interference resistance and no noise accumulation, the data converting unit 1013 (such as an AD converter) converts the analog current signal collected by the current collecting unit 1011 into a digital current signal, converts the voltage signal collected by the voltage collecting unit 1012 into a digital voltage signal from the analog voltage signal, and finally sends the digital current signal and the digital voltage signal obtained by conversion to the data processing module 104, so that the data processing module 104 performs further data processing according to the actual application scenario.
In some embodiments, referring to fig. 4, the data conversion unit 1013 includes an AD converter 1013a, a reference power supply 1013b, a first resistor R1 and a second resistor R2, and the AD converter 1013a includes a first AD conversion subunit ADC1, a second AD conversion subunit ADC2 and a communication subunit SPI.
The reference power supply 1013b is connected to the power end REF of the AD converter 1013a, and provides a reference operating voltage thereto; the first end of the first AD conversion subunit ADC1 is connected with the first end of the first resistor R1, the second end of the first AD conversion subunit ADC1 is grounded, and the third end of the first AD conversion subunit ADC1 is connected with the input end of the communication subunit SPI; the first end of the second AD conversion subunit ADC2 is connected with the first end of the second resistor R2, the second end of the second AD conversion subunit ADC2 is grounded, and the third end of the second AD conversion subunit ADC2 is connected with the input end of the communication subunit SPI; the output end of the communication subunit SPI is connected with the data processing module 104; the second end of the first resistor R1 is connected with the current acquisition unit 1011, and the second end of the second resistor R2 is connected with the voltage acquisition unit 1012.
The data conversion unit 1013 shown in fig. 4 operates as follows:
the operation voltage suitable for the AD converter 1013a is obtained by performing operations such as voltage stabilization and voltage reduction on the external power supply by the reference power supply 1013b, so as to supply power to the AD converter 1013a to make it work normally; the first sampling resistor, namely the first resistor R1, receives an analog current signal from the current acquisition unit 1011, sends the analog current signal to the first AD conversion subunit ADC1 for analog-to-digital conversion to obtain a corresponding digital current signal, and then transmits the digital current signal to the data processing module 104 through the communication subunit SPI; and receiving the analog voltage signal from the voltage acquisition unit 1012 through the second sampling resistor, namely the second resistor R2, sending the analog voltage signal to the second AD conversion subunit ADC2 for analog-to-digital conversion to obtain a corresponding digital voltage signal, and then transmitting the digital voltage signal to the data processing module 104 through the communication subunit SPI.
In some embodiments, referring to fig. 4 and fig. 5 together, the current collection unit 1011 includes a current transformer 1011a and a third resistor R3.
The current transformer 1011a is connected in series with the charging cable 106, a first end of the third resistor R3 is respectively connected to the first end of the current transformer 1011a and a second end (i.e., i+ end) of the first resistor R1, and a second end of the third resistor R3 is respectively connected to the second end of the current transformer 1011a and a second end (i.e., I-end) of the first AD conversion subunit ADC 1.
For example, the current transformer 1011a is selected as a zero-flux transformer of 1:1000, the resistance value of the first resistor R1 is 5Ω, the maximum value of the charging current I is 250A, and the equivalent impedance value equivalent to the primary charging current is (5/1000) =0.005 Ω. In this embodiment, the current transformer 1011a reduces the output charging current of the charging pile 20 by 1000 times and outputs the reduced charging current to the shunt resistor, that is, the first resistor R1, and the first resistor R1 converts the circuit signal into the voltage signal, so that the maximum voltage can be obtained by the following formula:
VI＝Iz*I＝0.005*250＝1.25V，
VI is the maximum voltage, iz is the equivalent impedance, and I is the maximum charge current.
That is, in the present embodiment, the differential mode input range of the AD converter 1013a to the current acquisition unit 1011 is 0V to 1.25V.
In some embodiments, referring to fig. 4 and 5, the voltage acquisition unit 1012 includes a fourth resistor R4 and a fifth resistor R5.
The first end of the fourth resistor R4 is connected to the first end of the charging cable 106 and the second end (i.e., the u+ end) of the second resistor R2, respectively, the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5 and the second end (i.e., the U-end) of the second AD conversion subunit ADC2, respectively, and the second end of the fifth resistor R5 is connected to the second end of the charging cable 106.
For example, the resistance of the fourth resistor R4 is 998Ω, the resistance of the fifth resistor R5 is 2Ω, and the maximum value of the primary charging voltage U is 1000V. That is, the voltage dividing ratio Kv of the voltage acquisition unit 1012 can be calculated by the following formula:
Kv＝(998+2)/2＝500，
since the maximum value of the primary charging voltage U is 1000V, the maximum value of the output voltage VU can be obtained by:
VU＝U/Kv＝1000/500＝2V,
that is, in the present embodiment, the differential mode input range of the AD converter 1013a to the voltage acquisition unit 1012 is 0V to 2V.
In summary, for the selection of the specification of the AD converter 1013a, reference may be made to the differential mode input range of the current acquisition unit 1011 and the voltage acquisition unit 1012 based thereon.
In some embodiments, referring to fig. 6, the charging post verification circuit 10 further includes a power supply module 109. The power supply module 109 is respectively connected with the first acquisition module 101, the second acquisition module 102, the positioning module 103, the data processing module 104 and the communication module 105, and is used for supplying power to the first acquisition module 101, the second acquisition module 102, the positioning module 103, the data processing module 104 and the communication module 105.
In some embodiments, referring to fig. 7, the charging post verification circuit 10 further includes a display module 110 and an external input module 111.
The display module 110 is connected to the data processing module 104, and is used for displaying external active power data, and the display module 110 may be an LCD display screen, an LED display screen, or the like; the external input module 111 is connected to the data processing module 104 for inputting charging parameters (such as charging current, charging voltage, charging power, etc.), and the external input module 111 may be a keyboard, a mouse, a handwriting board, etc., for example.
In some embodiments, please refer again to fig. 4 and 5 together, fig. 4 and 5 illustrate a possible implementation of the charging post verification circuit. In the embodiment shown in fig. 4, the data conversion unit 1013 includes an AD converter 1013a, a reference power supply 1013b, a first resistor R1, and a second resistor R2, and the AD converter 1013a includes a first AD conversion subunit ADC1, a second AD conversion subunit ADC2, and a communication subunit SPI.
In the embodiment shown in fig. 5, the charging pile verification circuit 10 includes a first acquisition module 101 formed by a current acquisition unit 1011, a voltage acquisition unit 1012, and a data conversion unit 1013, wherein the current acquisition unit 1011 includes a current transformer 1011a and a third resistor R3, and the voltage acquisition unit 1012 includes a fourth resistor R4 and a fifth resistor R5. The charging post verification circuit 10 further includes a camera (i.e., the second acquisition module 102), a GPS module (i.e., the positioning module 103), a 4G communication module (i.e., the communication module 105), a charging cable 106, a first socket 107, a second socket 108, a power supply module 109, a display (i.e., the display module 110), and a keyboard (i.e., the external input module 111).
The working principle of the charging pile verification circuit 10 in the embodiment shown in fig. 4 and 5 is explained below with reference to fig. 4 and 5, specifically as follows:
the power supply module 109 is used for respectively supplying power to the data conversion unit 1013, the data processing module 104, the camera, the GPS module and the 4G communication module in the first acquisition module 101, so that the modules can work normally.
The charging current of the charging pile 20 is reduced to a preset multiple (for example, reduced by 1000 times) through the current transformer 1011a and then output to the first resistor R1, the first resistor R1 converts the charging current signal into a charging voltage signal, and the charging voltage signal is transmitted to the first AD conversion subunit ADC1 through the second resistor R2, and the first AD conversion subunit ADC1 converts the received analog signal representing the charging current into a current digital signal and then transmits the current digital signal to the communication subunit SPORT1 of the data processing module 104 (MCU) through the communication subunit SPI; the charging voltage of the charging pile 20 is reduced to a preset multiple (for example, reduced by 500 times) through a voltage division network formed by the fourth resistor R4 and the fifth resistor R5, and is transmitted to the second AD conversion subunit ADC2 through the third resistor R3, and the second AD conversion subunit ADC2 converts the received analog signal representing the charging voltage into a voltage digital signal, and then is transmitted to the communication subunit SPORT1 of the data processing module 104 (MCU) through the port1 interface of the data processing module 104 through the communication subunit SPI. Through the steps, the collection of the active standard electric energy data is completed.
And shooting active power data displayed on a display by a camera after charging is finished, transmitting the active power data to a corresponding position of the data processing module 104 by a USB interface of the data processing module 104, collecting geographic position data of the charging pile 20 by a GPS module in real time, and transmitting the geographic position data to the corresponding position of the data processing module 104 by a UART1 interface of the data processing module 104.
After receiving the standard active power data, the external power data and the geographic position data, the data processing module 104 performs further data processing on the standard active power data, for example, calculates standard active power according to the standard active power data, extracts external active power according to the standard active power data, generates geographic position coordinates and the like of the charging pile according to the geographic position data, and sends the processed data such as the standard active power, the external active power, the geographic position coordinates and the like to the remote background system 30 through the 4G communication module, so that when the preprocessed geographic position data meets the condition, the remote background system 30 obtains verification results of the charging pile 20 according to the preprocessed standard active power data and the preprocessed external active power data.
Further, the professional with verification qualification can manually review the verification result generated by the remote background system 30, the received first preprocessing data, the second preprocessing data, the third preprocessing data and the like to ensure the accuracy of the verification result, and if the verification result generated by the remote background system 30 is confirmed to be correct, the professional with verification qualification can generate a verification report with authority, thereby completing the efficient and accurate verification of the charging pile.
The embodiment of the application also provides a charging pile verification method, referring to fig. 8, fig. 8 shows a schematic step diagram of the charging pile verification method, wherein the charging pile verification method comprises the following steps:
s101, acquiring standard active power data in the charging process of a charging pile;
s102, acquiring external active power data after the charging pile is charged;
s103, obtaining geographic position data of the charging pile;
s104, preprocessing the standard active power data to obtain first preprocessed data, preprocessing the external active power data to obtain second preprocessed data, and preprocessing the geographic position data to obtain third preprocessed data;
S105, the first preprocessing data, the second preprocessing data and the third preprocessing data are sent to a remote background system, so that the remote background system carries out verification on the charging pile according to the first preprocessing data, the second preprocessing data and the third preprocessing data, and a verification result is generated.
As described in step S101, the standard active power data includes active power data actually consumed in the charging process of the charging pile, which may be obtained by calculating electric parameters such as an actual charging current and an actual charging voltage monitored in the charging process. The actual charging current can be obtained through devices or circuit structures with current acquisition capability, such as a current transformer, a shunt, a rogowski coil and the like, and the actual charging voltage can be obtained through devices or circuit structures with voltage acquisition capability, such as a voltage transformer, a voltage dividing resistor network and the like.
As described in step S102, the external active power data includes, but is not limited to, the external published active power data after the charging of the charging pile is completed, for example, the external active power data may be active power data displayed to the user on the display device matched with the charging pile (for example, 40kWh is consumed in the charging), or active power data displayed on the charging APP, the public code-sweeping applet and the like bound to the charging pile by the user, or active power data which is not directly displayed to the user but only summarized and stored in the charging pile management background.
As described in step S103, it may be determined whether the currently-verified charging pile is the target verified charging pile or whether the currently-obtained standard active power data or the externally-active power data is detected from the target verified charging pile, that is, whether the data is the actual target charging pile verification data or the artificially-forged verification data, based on the obtained geographic position data. Therefore, in the verification process, if the geographic position data does not meet preset conditions, for example, the geographic position information of the charging pile represented by the geographic position data is not in a preset effective geographic position range, the verification data is directly judged to be abnormal, namely verification is disqualified, so that verification efficiency is improved, and the credibility of verification results is improved.
As described in the above step S104, the standard active power data is preprocessed to obtain first preprocessed data, the external active power data is preprocessed to obtain second preprocessed data, and the geographic location data is preprocessed to obtain third preprocessed data.
The standard active power data includes parameters such as an actual charging current, an actual charging voltage, and a charging duration provided by the charging pile in the charging process, and may be calculated according to the parameters such as the actual charging current, the actual charging voltage, and the charging duration, and the active power calculation rule to obtain standard active power, that is, first preprocessing data; the external active power data comprise the power consumption data (such as 40kWh consumed by the charging pile in total) displayed on the display device by the user after the charging is finished, and the key information (such as a specific power consumption value) in the image can be extracted by utilizing a preset image processing algorithm according to the shot image to obtain the external active power, namely second preprocessing data; and the geographic position data comprises geographic position information (such as longitude and latitude information) of the current position of the charging pile, and the position coordinates of the charging pile, namely third preprocessing data, are generated according to the obtained geographic position information.
As described in step S105, the first pre-processing data, the second pre-processing data and the third pre-processing data are sent to the remote background system, so that the remote background system performs verification on the charging pile according to the received first pre-processing data, second pre-processing data and third pre-processing data, and a verification result is generated.
The remote background system is used for receiving data such as standard active electric energy, external active electric energy, position coordinates of the charging pile and the like acquired by the charging pile verification site and obtained through data preprocessing, verifying the charging pile according to the received data such as the standard active electric energy, the external active electric energy, the position coordinates of the charging pile and the like, and generating verification results. The remote background system firstly checks the position coordinates of the charging pile to determine whether the geographic position of the charging pile is within a preset effective geographic position range, and if the geographic position of the charging pile is within the preset effective geographic position range of the target verification charging pile, the verification error of the charging pile is calculated according to the standard active electric energy and the external active electric energy, and the verification error can be calculated according to the following formula:
wherein eta is verification error, ex is external active power, and Ep is standard active power.
In some embodiments, it may be predetermined that the assay result is acceptable when the assay error η is less than a predetermined error threshold (e.g., 2%), otherwise the assay result is unacceptable. In addition, in the embodiment of the application, the professional with verification qualification can also manually check the verification result generated by the remote background system, the received first pretreatment data, the received second pretreatment data, the received third pretreatment data and the like so as to ensure the accuracy of the verification result, and if the verification result generated by the remote background system is confirmed to be accurate, the professional with verification qualification can generate a verification report with authority, thereby completing the efficient and accurate verification of the charging pile.
In the embodiment of the application, in order to reduce the probability of occurrence of the problem that the verification result is unreliable due to the fact that the data acquired or preprocessed by the verification site on the charging pile is artificially tampered or directly forged, the embodiment of the application can set certain tamper-proof settings on the verification data acquisition device, for example, various data acquired by the verification site are set to be invisible, and the acquired data is automatically sent to a remote background system after being preprocessed in the device. In addition, in the embodiment of the application, the position data of the charging pile is collected, so that whether the verification data come from a preset target verification charging pile instead of artificial forging or not or whether the verified charging pile is the preset target verification charging pile is judged according to the position data, and verification targets are ensured to be free of errors.
According to the charging pile verification method provided by the application, standard active power data of the charging pile is obtained, external active power data of the charging pile is obtained, and geographic position data of the charging pile is obtained; preprocessing standard active power data to obtain first preprocessed data, preprocessing external active power data to obtain second preprocessed data, and preprocessing geographic position data to obtain third preprocessed data; and sending the first preprocessing data, the second preprocessing data and the third preprocessing data to a remote background system, so that the remote background system carries out verification on the charging pile according to the first preprocessing data, the second preprocessing data and the third preprocessing data, and a verification result is generated. The field verification data obtained by the data acquisition device can not be edited and modified due to tamper-proof setting on the verification field, and whether the charging pile is a target verification charging pile can be judged based on the obtained geographic position data.
In some embodiments, the step of generating the certification result from the standard active power data and the external active power data comprises:
if the third preprocessing data accords with the preset condition and the second preprocessing data is larger than the preset threshold, calculating the electric energy error of the charging pile according to the first preprocessing data and the second preprocessing data, and generating a verification result. As described above, in some embodiments, the position coordinates of the charging pile, that is, the third pre-processing data, are first checked to determine whether the position coordinates of the charging pile meet the preset requirements, for example, whether the geographic position of the charging pile is within the preset valid geographic position range is determined, if the geographic position of the charging pile is within the preset valid geographic position range of the target verification charging pile, the position coordinates of the charging pile meet the preset conditions, the verification errors of the charging pile are further calculated according to the standard active power and the external active power, otherwise, the verification result is directly determined to be unqualified, and the verification is performed again on the charging pile to improve the verification efficiency and the reliability of the verification result.
In addition, according to the requirements of a part of the verification procedure, for example, the ratio of the electric energy value represented by the digital last bit (or the minimum graduation) displayed by the display of the charging pile to the accumulated electric energy should be not more than one tenth of the grade index of the charging pile, therefore, only when the external active electric energy value (i.e. the second preprocessing data) represented by the external active electric energy data is more than the preset threshold (for example, the first-stage charging pile with the resolution of 0.001kWh requires at least 1.000kWh of electric quantity, the second-stage charging pile with the resolution of 0.001kWh requires at least 0.500kWh of electric quantity), and the third preprocessing data accords with the preset condition, the electric energy error of the charging pile is calculated according to the standard active electric energy data and the external active electric energy, so as to generate the verification result, so as to improve the verification efficiency of the charging pile.
The embodiment of the application also provides a terminal device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the steps in the method embodiments can be realized when the processor executes the computer program.
The embodiments of the present application also provide a computer-readable storage medium storing a computer program, which when executed by a processor, implements the steps of the respective method embodiments described above.
The embodiments of the present application also provide a computer program product which, when run on a terminal device, causes the terminal device to perform the steps of the method embodiments described above.
It should be noted that, all or part of the flow of the method in the foregoing embodiment of the present application may be implemented by a computer program, which may be stored in a computer readable storage medium and executed by a processor, and instruct related hardware to implement the steps of each embodiment of the foregoing method. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing device/terminal apparatus, recording medium, computer Memory, read-Only Memory (ROM), random access Memory (RAM, random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. Such as a U-disk, removable hard disk, magnetic or optical disk, etc. In some jurisdictions, computer readable media may not be electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. A charging post verification circuit, comprising:
the first acquisition module is used for acquiring standard active power energy data in the charging process of the charging pile;
the second acquisition module is used for acquiring external active electric energy data after the charging of the charging pile is finished;
the positioning module is used for acquiring geographic position data of the charging pile;
the data processing module is respectively connected with the first acquisition module, the second acquisition module, the positioning module and the communication module, and is used for preprocessing the standard active power data to obtain first preprocessed data, preprocessing the external active power data to obtain second preprocessed data, and preprocessing the geographic position data to obtain third preprocessed data;
The communication module is in communication connection with the remote background system and is used for sending the first preprocessing data, the second preprocessing data and the third preprocessing data to the remote background system, so that the remote background system can verify the charging pile according to the first preprocessing data, the second preprocessing data and the third preprocessing data to generate verification results.
2. The charging post verification circuit of claim 1, further comprising:
the charging cable is connected between the first socket and the second socket;
the first socket is used for connecting the power supply end of the charging pile;
and the second socket is used for connecting with the charging end of the target charging object.
3. The charging post verification circuit of claim 2, wherein the first acquisition module comprises:
the current acquisition unit is used for acquiring current signals in the charging process of the charging pile;
the voltage acquisition unit is used for acquiring voltage signals in the charging process of the charging pile;
the data conversion unit is respectively connected with the current acquisition unit and the voltage acquisition unit and is used for carrying out analog-to-digital conversion on the current signals to obtain digital current signals, carrying out analog-to-digital conversion on the voltage signals to obtain digital voltage signals, and sending the digital current signals and the digital voltage signals to the data processing module.
4. A charging post verification circuit according to claim 3, wherein the data conversion unit comprises: the AD converter comprises a first AD conversion subunit, a second AD conversion subunit and a communication subunit;
the power utilization end of the AD converter is connected with the reference power supply;
a first end of the first AD conversion subunit is connected with a first end of the first resistor, a second end of the first AD conversion subunit is grounded, and a third end of the first AD conversion subunit is connected with an input end of the communication subunit;
the first end of the second AD conversion subunit is connected with the first end of the second resistor, the second end of the second AD conversion subunit is grounded, and the third end of the second AD conversion subunit is connected with the input end of the communication subunit;
the output end of the communication subunit is connected with the data processing module;
the second end of the first resistor is connected with the current acquisition unit, and the second end of the second resistor is connected with the voltage acquisition unit.
5. The charging pile verification circuit of claim 4, wherein the current acquisition unit comprises a current transformer and a third resistor;
The current transformer is connected in series with the charging cable, a first end of the third resistor is respectively connected with the first end of the current transformer and a second end of the first resistor, and a second end of the third resistor is respectively connected with the second end of the current transformer and a second end of the first AD conversion subunit.
6. The charging pile verification circuit of claim 4, wherein the voltage acquisition unit comprises a fourth resistor and a fifth resistor;
the first end of the fourth resistor is connected with the first end of the charging cable and the second end of the second resistor respectively, the second end of the fourth resistor is connected with the first end of the fifth resistor and the second end of the second AD conversion subunit respectively, and the second end of the fifth resistor is connected with the second end of the charging cable.
7. The charging post verification circuit of any one of claims 1 to 6, further comprising:
the power supply module is respectively connected with the first acquisition module, the second acquisition module, the data processing module, the positioning module and the communication module and is used for supplying power to the first acquisition module, the second acquisition module, the data processing module, the positioning module and the communication module.
8. The charging post verification circuit of claim 7, further comprising:
the display module is connected with the data processing module and used for displaying the external active power data;
and the external input module is connected with the data processing module and is used for inputting charging parameters.
9. A method of calibrating a charging pile, comprising:
standard active electric energy data in the charging process of the charging pile are obtained;
acquiring external active electric energy data after the charging pile is charged;
obtaining geographic position data of the charging pile;
preprocessing the standard active power data to obtain first preprocessed data, and
preprocessing the external active power data to obtain second preprocessed data, and
preprocessing the geographic position data to obtain third preprocessed data;
and sending the first preprocessing data, the second preprocessing data and the third preprocessing data to a remote background system, so that the remote background system carries out verification on the charging pile according to the first preprocessing data, the second preprocessing data and the third preprocessing data, and a verification result is generated.
10. The method of claim 9, wherein the step of calibrating the charging post according to the first pre-processing data, the second pre-processing data, and the third pre-processing data to generate a calibration result comprises:
if the third preprocessing data accords with the preset condition and the second preprocessing data is larger than the preset threshold, calculating the electric energy error of the charging pile according to the first preprocessing data and the second preprocessing data, and generating a verification result.
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