CN113702737B

CN113702737B - Charging pile and inspection method, device and equipment applied to charging pile

Info

Publication number: CN113702737B
Application number: CN202110980674.2A
Authority: CN
Inventors: 李文强; 杨梅; 管泽鑫; 马雪锋; 刘建波; 王尚; 黄建钟
Original assignee: Shandong Institute of Metrology
Current assignee: Shandong Institute of Metrology
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2024-04-23
Anticipated expiration: 2041-08-25
Also published as: CN113702737A

Abstract

The embodiment of the invention discloses a charging pile, and a verification method, a verification device and verification equipment applied to the charging pile, wherein the method comprises the following steps: responding to a received verification request for verifying the charging pile to be detected, and acquiring a reference information table for storing the reference electric energy accumulated pulse number and the reference time mark with corresponding relations; receiving first to-be-detected information and second to-be-detected information sent by the to-be-detected charging pile at different moments, wherein the first to-be-detected information comprises a first to-be-detected accumulated pulse number and a first to-be-detected time mark, and the second to-be-detected information comprises a second to-be-detected accumulated pulse number and a second to-be-detected time mark; determining a first reference accumulated pulse number and a second reference accumulated pulse number according to the first time mark to be detected, the second time mark to be detected and the reference time mark in the reference information table; and determining and outputting a checking result of the charging pile to be checked according to the first accumulated pulse number to be checked, the second accumulated pulse number to be checked, the first reference accumulated pulse number and the second reference accumulated pulse number, so as to realize accurate, rapid and safe checking of the charging pile.

Description

Charging pile and inspection method, device and equipment applied to charging pile

Technical Field

The invention relates to the technical field of new energy application, in particular to a charging pile and a checking method, a checking device and checking equipment applied to the charging pile.

Background

The new energy automobile has the advantages of low energy consumption, light pollution and the like which are incomparable with the traditional fuel automobile, and can solve the problems of energy shortage, environmental pollution and the like. Under the macroscopic background of low carbon and energy saving economy construction, the development of new energy automobiles is a trend. The quantity and the quality of the charging piles are closely related to the sales of the new energy automobile. In order to ensure the safety of charging, an AC/DC charging pile and an off-board DC charger are already listed in a forced catalog of a metering appliance catalog for forced management, and the active electric energy of the charging pile is a forced detection project every year.

Most of the current AC/DC charging piles do not have pulse output. For the charging pile without pulse output, the related art mainly uses an electric energy comparison method to measure active electric energy, and is limited by working current, and the measuring speed is very slow because 30 minutes or longer (some even one day) are required for detecting one point. For the charging pile with pulse output, two types are mainly classified according to output modes: the electric pile adopts the electric interface to carry out pulse output, and field wiring is needed when active electric energy is measured, so that the efficiency is low, and potential safety hazards exist; the other type is a charging pile for pulse output by adopting a Light-emitting diode (Light-RmittingDiode, LED), because the charging pile is quite a lot of outdoor, the Light is strong, and natural Light interference can cause inaccurate focusing of the photoelectric head, so that the Light inlet quantity obtained by the photoelectric head is inconsistent before and after, the converted pulse of the photoelectric head is distorted, and the measurement accuracy is affected.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a charging pile, and a method, an apparatus, and a device for inspecting the charging pile, which are used to solve at least the problems of low accuracy, slow detection speed, long detection time, and low safety in the prior art when the charging pile is inspected, so as to implement accurate, rapid, and safe inspection of the charging pile.

To achieve one or a part or all of the above or other objects, an embodiment of the present invention provides a method for verifying a charging pile, including:

Responding to a received verification request for verifying the charging pile to be detected, and acquiring a reference information table, wherein the reference information table is used for storing a reference electric energy accumulated pulse number and a reference time mark, which are obtained by sampling electric energy of the reference charging pile and have a corresponding relation;

Receiving first to-be-detected information and second to-be-detected information sent by the to-be-detected charging pile at different moments, wherein the first to-be-detected information comprises a first to-be-detected accumulated pulse number and a first to-be-detected time mark, and the second to-be-detected information comprises a second to-be-detected accumulated pulse number and a second to-be-detected time mark;

determining a first reference accumulated pulse number and a second reference accumulated pulse number according to the first time mark to be detected, the second time mark to be detected and the reference time mark in the reference information table;

and determining and outputting a verification result of the charging pile to be detected according to the first accumulated pulse number to be detected, the second accumulated pulse number to be detected, the first reference accumulated pulse number and the second reference accumulated pulse number.

In some embodiments, the obtaining, in response to a received verification request for verifying the charging pile to be detected, a reference information table includes:

Responding to a received verification request for verifying the charging pile to be detected, and sampling the reference electric energy of the reference charging pile according to a preset sampling period to obtain a plurality of sampling information;

Determining a reference accumulated pulse number and a reference time mark corresponding to each piece of sampling information according to each piece of sampling information and the sampling period;

and storing the reference accumulated pulse number and the reference time mark corresponding to each piece of sampling information to obtain a reference information table.

In some embodiments, the sampled information includes at least active electrical energy and active power;

The determining the reference accumulated pulse number and the reference time mark corresponding to each sampling information according to each sampling information and the sampling period comprises the following steps:

Acquiring first active energy and second active energy obtained by sampling two adjacent times from each sampling information;

determining an energy difference according to the second active energy and the first active energy;

when the energy difference is larger than the single-pulse equivalent energy, determining a reference accumulated pulse number and a reference time scale corresponding to each piece of sampling information according to the single-pulse equivalent energy, the sampling period and the active power included in each piece of sampling information.

In some embodiments, the responding to the received verification request for verifying the charging pile to be detected samples the reference electric energy of the reference charging pile according to a preset sampling period to obtain a plurality of sampling information, including:

Responding to a received verification request for verifying the charging pile to be detected, and adjusting a reference clock of the reference charging pile according to the clock to be detected of the charging pile to be detected to obtain an adjusted reference clock;

Determining a time setting error of the charging pile to be detected and the reference charging pile according to the clock to be detected and the adjusted reference clock;

and when the time setting error is smaller than a preset error threshold, determining that the accuracy grade of the reference charging pile accords with the verification precision, and sampling the reference electric energy of the reference charging pile according to a preset sampling period to obtain a plurality of sampling information.

In some embodiments, the responding to the received verification request for verifying the to-be-detected charging pile, according to the to-be-detected clock of the to-be-detected charging pile, adjusts the reference clock of the reference charging pile to obtain an adjusted reference clock, and includes:

Responding to a received verification request for verifying a charging pile to be detected, sampling a reference voltage of the reference charging pile according to the sampling period to obtain a first sampling voltage value and a second sampling voltage value, wherein the first sampling voltage value is a previous sampling voltage value of the second sampling voltage value;

And when the first sampling voltage value is smaller than a preset voltage threshold value and the second sampling voltage value is larger than the preset voltage threshold value, adjusting the reference clock of the reference charging pile according to the to-be-detected clock of the to-be-detected charging pile to obtain an adjusted reference clock.

In some embodiments, the adjusting the reference clock of the reference charging pile according to the to-be-detected clock of the to-be-detected charging pile to obtain an adjusted reference clock includes:

Acquiring an initial reference time mark according to a reference clock of the reference charging pile, wherein the initial reference time mark is the time of the reference clock when the first sampling voltage value is sampled;

Determining a reference time mark to be adjusted according to the initial reference time mark, the sampling period, the first sampling voltage value and the second sampling voltage value;

Acquiring a first time mark corresponding to the reference time mark to be adjusted according to a clock to be detected of the charging pile to be detected;

determining clock deviation of the reference charging pile and the charging pile to be detected according to the first time scale and the reference time scale to be adjusted;

and adjusting the reference clock of the reference charging pile based on the clock deviation to obtain an adjusted reference clock.

In some embodiments, the method further comprises:

And when the first to-be-detected information and/or the second to-be-detected information are not received, or the electric energy difference is smaller than or equal to the single pulse equivalent electric energy, or the time setting error is larger than or equal to a preset error threshold value, determining and outputting prompt information of failed detection.

The embodiment of the invention provides a verification device applied to a charging pile, which comprises the following components:

The acquisition module is used for responding to a received verification request for verifying the charging pile to be detected, and acquiring a reference information table, wherein the reference information table is used for storing a reference electric energy accumulated pulse number and a reference time mark, which are obtained by sampling electric energy of the reference charging pile and have a corresponding relation;

The receiving module is used for receiving first to-be-detected information and second to-be-detected information sent by the to-be-detected charging pile at different moments, wherein the first to-be-detected information comprises a first to-be-detected accumulated pulse number and a first to-be-detected time mark, and the second to-be-detected information comprises a second to-be-detected accumulated pulse number and a second to-be-detected time mark;

The first determining module is used for determining a first reference accumulated pulse number and a second reference accumulated pulse number according to the first time scale to be detected, the second time scale to be detected and the reference time scale in the reference information table;

The second determining module is used for determining and outputting a checking result of the charging pile to be checked according to the first accumulated pulse number to be checked, the second accumulated pulse number to be checked, the first reference accumulated pulse number and the second reference accumulated pulse number.

The embodiment of the invention provides verification equipment applied to a charging pile, which comprises the following components:

A memory for storing executable instructions;

and the processor is used for realizing the method provided by the embodiment of the invention when executing the executable instructions stored in the memory.

The embodiment of the invention provides a charging pile, which comprises:

the charging pile comprises a charging pile body, an acquisition module, a control module, a clock module, a transmission module and a detection module;

The control module is connected with the charging pile body, the acquisition module, the clock module, the transmission module and the detection module and is used for controlling the charging pile body, the acquisition module, the clock module, the transmission module and the detection module to realize the method provided by the embodiment of the invention.

The implementation of the embodiment of the invention has the following beneficial effects:

When the verification device receives a verification request for verifying the to-be-detected charging pile, sampling the electric energy of the reference charging pile, and storing the reference electric energy accumulated pulse number and the reference time mark obtained by sampling into a reference information table. When receiving to-be-detected information sent by the to-be-detected charging pile at different moments, determining a reference time mark corresponding to the to-be-detected time mark at different moments from a reference information table according to the to-be-detected time mark in the to-be-detected information so as to further obtain a reference accumulated pulse number corresponding to the reference time mark, and thus, according to the reference accumulated pulse number at different moments and the to-be-detected accumulated pulse number, realizing the verification of the to-be-detected charging pile.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is a schematic diagram of an implementation flow of a verification method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an implementation flow for obtaining a reference information table according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a composition structure of a charging pile according to an embodiment of the present invention;

FIG. 4 is a schematic block diagram illustrating an internal process of a charging stake according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a process for implementing a zero-crossing clock synchronization task according to an embodiment of the present invention;

FIG. 6 is a schematic flow chart of an implementation of time scale calculation according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of calculating an accumulation of electrical energy according to an embodiment of the present invention;

fig. 8 is a schematic flow chart of an implementation of a method for verifying a charging pile based on virtual pulse output of wireless bluetooth according to an embodiment of the present invention;

FIG. 9 is a schematic flow chart of an implementation of a clock tick task according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a flow chart for implementing an active power error checking task according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of calculating an active power calibration error according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a structure of a verification device according to an embodiment of the present invention;

fig. 13 is a schematic diagram of a composition structure of a verification device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In order to better understand the verification method provided by the embodiment of the invention, the charging pile, the verification method and the defects in the related art are described first.

And according to the charging infrastructure of the electric automobile in China, the alliance data display is promoted, and up to 2021, 83.7 thousands of public class charging piles are reported to member units in the alliance, wherein 48.8 thousands of alternating current charging piles, 34.9 thousands of direct current charging piles and 481 alternating current and direct current integrated charging piles are reported.

The invention relates to a method for measuring the active electric energy of a charging pile of a new energy automobile, which is characterized in that the charging pile of the new energy automobile is listed in the key field of a new foundation of the country, the charging pile of the China is constructed in the next ten years, 6300 ten thousands of gaps exist in the construction of the charging pile of the China, an electric automobile alternating (direct) current charging pile/an off-vehicle direct current charger is listed in the forced catalogue of a metering appliance catalogue for implementing forced management, the active electric energy of the charging pile is taken as a forced verification project every year, most of the charging piles which are in alternating direct current charging at present do not have pulse detection output of hardware, the measuring speed is very slow, the charging pile without pulse output measures the accuracy of the active electric energy by using an electric energy comparison method, the measuring speed is 30 minutes or more under the minimum working current, the potential safety hazard of field connection can be brought about by adopting an electric interface for the charging pile with pulse output, the output of an optical LED is adopted, the charging pile is mostly outdoors, the light is strong, the photoelectric interference can cause that the photoelectric head is not focused on the time, the light quantity obtained by the photoelectric head is inconsistent, the pulse generation distortion is introduced into errors, the charging pile is low in efficiency of the field detection, the reliability is poor, the reliability of the charging pile is greatly detected by adopting the method for measuring the charging pile with the current on the basis of the electric energy, the invention, the current is greatly reduced by the time of the field connection and the current measurement, and the charging pile has high practical pulse output and the practical pulse detection time.

Referring to fig. 1, fig. 1 is a schematic flow chart of an implementation of a verification method according to an embodiment of the present invention, where the method is applied to a charging pile, and the following description will refer to the steps shown in fig. 1.

Step S101, a reference information table is acquired in response to a received verification request for verifying the charging pile to be detected.

When a check person needs to check, starting the reference charging pile and the charging pile to be checked, triggering a triggering instruction for sending a check request by a user through starting operation, and after the check device receives the check request, responding to the request to acquire a reference information table of the reference charging pile, wherein data obtained by sampling electric energy of the reference charging pile is stored in the reference information table, and the data at least comprises a reference electric energy accumulated pulse number and a reference time mark and a corresponding relation between the reference electric energy accumulated pulse number and the reference time mark.

In one implementation, when sampling the reference charging pile, the sampling frequency may be 10 Kilo samples per Second (ksps), i.e., 10000 samples per Second(s) with a sampling period of 100 microseconds (us), and the sampling task is performed every 100 us. In the embodiment of the invention, the sampling frequencies of the reference charging pile and the charging pile to be detected are the same and are all 10ksps, and of course, other sampling frequencies can be adopted, so that the sampling frequency is not lower than 10ksps for ensuring the accuracy.

In this embodiment, the reference information table may be an information table in a buffer space, where information collected in a period of time closest to the reference information table is recorded, for example, the accumulated pulse number of the reference electric energy collected in the buffer 10s and the reference time stamp. The reference charging stake may be a charging stake calibrator.

Step S102, receiving first to-be-detected information and second to-be-detected information sent by the to-be-detected charging pile at different moments.

Here, when the charging pile to be detected works normally, the charging pile to be detected can send the accumulated pulse number and the time scale of the electric energy of the charging pile to be detected once every pulse period, for example, 1 second. Here, the first to-be-detected information and the second to-be-detected information may be information sent to the verification device at two adjacent times, or may be non-adjacent times, and in this embodiment, adjacent times are taken as an example for explanation.

The first to-be-detected information comprises a first to-be-detected accumulated pulse number and a first to-be-detected time mark, and the second to-be-detected information comprises a second to-be-detected accumulated pulse number and a second to-be-detected time mark. For convenience of description and distinction, the number of accumulated pulses to be detected included in the second to-be-detected information is denoted as N _n, the second to-be-detected time mark T _n included in the second to-be-detected information is denoted as information acquired at adjacent time instants, and since the time interval is 1s, the to-be-detected charging pile acquires 10000 times per second, the number of accumulated pulses to be detected included in the first to-be-detected information is denoted as N _n-10000, and the first to-be-detected time mark T _n-10000 included in the first to-be-detected information.

Step S103, determining a first reference accumulated pulse number and a second reference accumulated pulse number according to the first to-be-detected time scale, the second to-be-detected time scale and the reference time scale in the reference information table.

When the reference charging pile is collected in step S101, the reference power accumulated pulse number N _bn and the reference time scale T _bn may be saved at a sampling interval of 100 us. According to the received second to-be-detected time mark T _n and the first to-be-detected time mark T _n-10000 of the to-be-detected charging pile, searching a reference time mark T _bn closest to the second to-be-detected time mark T _n in a reference information table, and acquiring a reference electric energy accumulated pulse number corresponding to the reference time mark T _bn, namely a second reference accumulated pulse number N _bn in the reference information table.

Because the charging pile to be detected sends the information to be detected once every 1s, and the reference charging pile acquires 10000 times per second, the first time mark to be detected is sent once according to the time mark T _n-10000 (the sampling rate is 10ksps,1 second) of the last received charging pile to be detected, the reference time mark T _bn-10000 closest to the first time mark T _n-10000 to be detected is searched in the reference information, and the reference electric energy pulse accumulated pulse number of the reference charging pile corresponding to the reference time mark T _bn-10000 is obtained in the reference information table, namely the first reference accumulated pulse number N _bn-10000;

Step S104, determining and outputting a verification result of the charging pile to be detected according to the first accumulated pulse number to be detected, the second accumulated pulse number to be detected, the first reference accumulated pulse number and the second reference accumulated pulse number.

According to the first number of accumulated pulses to be detected N _n-10000, the second number of accumulated pulses to be detected N _n, the first number of accumulated pulses to be detected N _bn-10000, and the second number of accumulated pulses to be detected N _bn obtained in step S103, the active power error Err is calculated according to the following formula (1):

In the embodiment of the invention, the ultra-high frequency pulse method is used for checking the charging pile to be checked, and due to high pulse resolution, the pulse number of active electric energy is changed within 100us time, and the rapid detection of the active electric energy within 1 second can be realized by matching the electric energy buffer data (i.e. the accumulated pulse number of reference electric energy) and the time mark buffer data (i.e. the reference time mark) in the reference data table of the reference charging pile. Compared with the traditional low-frequency pulse method, the method has the advantages that measurement variation caused by the non-synchronization of the low-frequency pulse method does not exist, the low-frequency pulse method has large detection variation under the on-site dynamic load, the detection requirement can be met only by long test time, the measurement time is short, and the checking of the charging pile to be detected can be realized only by 1 second in the two-time interval. Compared with the traditional low-frequency pulse method, the method does not need wiring or collecting through a photoelectric collector, the wiring brings potential safety hazard on site and additional workload, the photoelectric collection is easy to receive sunlight interference, the method does not need wiring or a photoelectric head, and the method is safe and convenient in a non-contact mode. Compared with the method that the current majority of charging piles to be detected are manually compared with the reference charging pile by reading the electric energy of the charging piles to be detected through a screen of the charging piles to be detected or an Application (APP) mobile phone screen, the method can be used for carrying out electric energy error verification, and the verification can be completed only by a few hours or even more, and the method can be used for obtaining a verification result in1 second and is quick and effective. The quick detection method can be suitable for quick detection of the charging pile under the distortion load of the charging site.

The verification method applied to the charging pile provided by the embodiment of the invention comprises the following steps: responding to a received verification request for verifying the charging pile to be detected, and acquiring a reference information table, wherein the reference information table is used for storing a reference electric energy accumulated pulse number and a reference time mark, which are obtained by sampling electric energy of the reference charging pile and have a corresponding relation;

Receiving first to-be-detected information and second to-be-detected information sent by the to-be-detected charging pile at different moments, wherein the first to-be-detected information comprises a first to-be-detected accumulated pulse number and a first to-be-detected time mark, and the second to-be-detected information comprises a second to-be-detected accumulated pulse number and a second to-be-detected time mark; determining a first reference accumulated pulse number and a second reference accumulated pulse number according to the first time mark to be detected, the second time mark to be detected and the reference time mark in the reference information table; and determining and outputting a checking result of the charging pile to be checked according to the first accumulated pulse number to be checked, the second accumulated pulse number to be checked, the first reference accumulated pulse number and the second reference accumulated pulse number, so as to accurately, quickly and safely check the charging pile.

In some embodiments, "obtaining the reference information table in response to the received verification request for verifying the charging pile to be detected" in step S101 in the embodiment shown in fig. 1 described above may be implemented by steps S1011 to S1013 shown in fig. 2:

Step S1011, in response to a received verification request for verifying the charging pile to be detected, sampling the reference electric energy of the reference charging pile according to a preset sampling period to obtain a plurality of sampling information.

Here, the sampling information includes at least active electric energy and active power.

The method for collecting the active electric energy can adopt dot product and algorithm. P _n is the active power of the current sampling point n, P _n is the product of the current sampling points of the voltage or current for a direct current charging pile or a single-phase alternating current charging pile, and P _n is the sum of the products of the three-phase voltage and current sampling points for a three-phase alternating current charging pile. The active power value is accumulated according to formula (2) every time data of one sampling point is sampled.

Wherein E _pn is the active energy of the nth sampling point, E _pn-1 is the active energy of the n-1 (i.e. last) sampling point, P _n is the active power of the nth sampling point, T _s is the sampling period (which can take a value of 100us in the invention), and DeltaE _p is the difference between the last output active energy and the last output active energy, lastE _pn is the last output active energy.

Step S1012, determining the reference accumulated pulse number and the reference time scale corresponding to each piece of sampling information according to each piece of sampling information and the sampling period.

Acquiring first active energy and second active energy obtained by sampling two adjacent times from each sampling information; determining an energy difference according to the second active energy and the first active energy; when the energy difference is larger than the single-pulse equivalent energy, determining a reference accumulated pulse number and a reference time scale corresponding to each piece of sampling information according to the single-pulse equivalent energy, the sampling period and the active power included in each piece of sampling information.

Step S1013, storing the reference accumulated pulse number and the reference time stamp corresponding to each piece of sampling information to obtain a reference information table.

Here, the storage is performed in correspondence between the reference accumulated pulse number and the reference time stamp. The reference information table can be stored in the cache, and in the storage process, the reference information table is convenient to update, the reading speed can be improved, and the verification efficiency of the charging pile is further improved.

In some embodiments, step S1011 "in the embodiment shown in fig. 2 described above, in response to a received verification request for verifying a charging pile to be detected, samples reference electric energy of a reference charging pile according to a preset sampling period, and obtains a plurality of sampling information" may be implemented as the following steps:

Step S10111, in response to a received verification request for verifying the to-be-detected charging pile, adjusts the reference clock of the reference charging pile according to the to-be-detected clock of the to-be-detected charging pile, so as to obtain an adjusted reference clock.

Before sampling, in order to enable the data of the reference charging pile and the data of the charging pile to be detected to correspond, the clocks of the reference charging pile and the clock of the charging pile to be detected are first needed to be clocked, so that under the same sampling frequency, after the same sampling frequency is performed, the obtained accumulated pulse number is the pulse number corresponding to the same time scale, and the comparison operation of the step S10112 can be performed.

Step S10112, determining a time synchronization error between the to-be-detected charging pile and the reference charging pile according to the to-be-detected clock and the adjusted reference clock.

The adjusted reference clock is consistent with the clock to be detected, when the clock is not in a time setting error, the clock is consistent after the same sampling period, but when the clock is in the time setting error, even if the clock is consistent when the sampling starts, the clock is not consistent any more along with the increase of the sampling times, the condition that T _n is closest to the reference time mark T _bn-20 possibly exists, and the accumulated pulse numbers sampled at different sampling times are compared, so that the verification result is influenced necessarily. In this embodiment, in order to avoid this, after the adjustment of the reference clock is completed, it is further determined whether a time setting error exists between the to-be-detected charging pile and the reference charging pile according to the to-be-detected clock and the adjusted reference clock, after the same number of samplings, if the clock of the to-be-detected charging pile is different from the clock of the reference charging pile, it is determined that a time setting error exists between the to-be-detected charging pile and the reference charging pile, at this time, it is determined whether the time setting error affects the accuracy of the test result, and when the time setting error is smaller than a preset error threshold, step S10113 is entered; and when the time setting error is larger than a preset error threshold, considering that the time setting error influences the verification result, ending the verification process at the moment, and controlling the reference charging pile to finish sampling.

And step S10113, when the time setting error is smaller than a preset error threshold, determining that the accuracy grade of the reference charging pile accords with the verification precision, and sampling the reference electric energy of the reference charging pile according to a preset sampling period to obtain a plurality of sampling information.

In some embodiments, step S10111 "is to respond to the received verification request for verifying the charging pile to be detected, and adjust the reference clock of the reference charging pile according to the clock to be detected of the charging pile to be detected, so as to obtain the adjusted reference clock" may be implemented as the following steps:

And step S1111, in response to a received verification request for verifying the charging pile to be detected, sampling the reference voltage of the reference charging pile according to the sampling period to obtain a first sampling voltage value and a second sampling voltage value.

The first sampled voltage value here is the previous sampled voltage value of the second sampled voltage value, i.e. the second sampled voltage value is denoted y _n, and the first sampled voltage value may be denoted y _n-1.

In step S1112, when the first sampling voltage value is smaller than the preset voltage threshold and the second sampling voltage value is larger than the preset voltage threshold, the reference clock of the reference charging pile is adjusted according to the to-be-detected clock of the to-be-detected charging pile, so as to obtain the adjusted reference clock.

The preset voltage threshold here may be 0, i.e. it is determined whether or not to go from a negative value to a positive value (zero crossing) based on the first sampled voltage value, the second sampled voltage value and the preset voltage threshold. When y _n-1 is less than or equal to 0 and y _n is more than or equal to 0, determining to execute the time scale calculation of zero crossing. When y _n-1 is not less than or equal to 0 and y _n is not less than or equal to 0, the clock pair task is exited.

Acquiring an initial reference time mark according to a reference clock of the reference charging pile, wherein the initial reference time mark is the time of the reference clock when the first sampling voltage value is sampled; determining a reference time mark to be adjusted according to the initial reference time mark, the sampling period, the first sampling voltage value and the second sampling voltage value; acquiring a first time mark corresponding to the reference time mark to be adjusted according to a clock to be detected of the charging pile to be detected; determining clock deviation of the reference charging pile and the charging pile to be detected according to the first time scale and the reference time scale to be adjusted; and adjusting the reference clock of the reference charging pile based on the clock deviation to obtain an adjusted reference clock.

Firstly, an initial reference time mark t _bn-1 is obtained according to a reference clock for reference charging, when a Bluetooth time mark command is received, the time mark command is unpacked to obtain a time mark of a charging pile to be detected carried in the time mark command, and then the initial reference time mark, a sampling period, a first sampling voltage value and a second sampling voltage value are utilizedThe reference time scale t _bn to be adjusted is calculated. And then, according to a to-be-detected clock of the to-be-detected charging pile, acquiring a first time mark T _bz corresponding to a to-be-adjusted reference time mark, calculating according to T _zn-T_zb to obtain clock deviation delta T _z, and finally, adding the clock of the reference charging pile with the clock deviation to obtain an adjusted reference charging pile clock T _b＝T_b+ΔT_z.

In some embodiments, when the verification device does not receive the first to-be-detected information, or receives the second to-be-detected information, or does not receive the first to-be-detected information and the second to-be-detected information within the preset time period, the verification fails, and at this time, a prompt message of the failure of the verification is output.

In some embodiments, when the energy difference is less than or equal to a single pulse equivalent energy, or when the time-to-time error is greater than or equal to a preset error threshold, a verification failure is also determined, and a prompt for the verification failure is output.

In some embodiments, the prompt information for prompting the failure of the verification is output, and meanwhile, the reason of the failure of the verification can also be output, if the first information to be detected is not received, so that the verification personnel can purposefully maintain the verification.

Based on the foregoing embodiments, the embodiments of the present invention provide a verification device applied to a charging pile, where each module included in the device and each unit included in each module may be implemented by a processor in a computer device; of course, the method can also be realized by a specific logic circuit; in an implementation, the processor may be a central Processing unit (Central Processing Unit, CPU), a microprocessor (Microprocessor Unit, MPU), a digital signal processor (DIGITAL SIGNAL Processing, DSP), or a field programmable gate array (Field Programmable GATE ARRAY, FPGA), etc.

Fig. 3 is a schematic diagram of a composition structure of a charging pile according to an embodiment of the present invention, as shown in fig. 3, the charging pile mainly includes: the charging pile comprises a charging pile body 31, an acquisition module 32, a control module 33, a clock module 34, a transmission module 35 and a detection module 36.

The charging pile body 31 is an ac or dc charging pile, and includes a single-phase charging pile, a three-phase ac charging pile, and a dc charging pile below 250A.

The acquisition module 32 may be an AD acquisition module, and employs a 24BIT 8-channel strictly synchronous sigma-delta AD converter ADs1278, with an integral error typically of: in the present invention, the AD sampling rate is set to 10ksps, with a maximum sampling rate of 128ksps, ±0.0003%, two of the acquisition channels being used for single-phase ac charging piles and dc charging piles, and 6 of the acquisition channels being used for three-phase ac charging piles.

The control module 33 may include BF609 and its peripherals, and is composed of BF609 chips of ADI corporation and its peripherals, and a large number of peripherals including 1 SPI interface, 1 TWI interface, timer, serial port (UART), AMC interface (asynchronous memory interface), etc. are built in the chips.

The clock module 34 may be an RTC clock, such as an M41TC8025 high stability real time clock chip of a legal semiconductor, with a maximum error of + -5.0 ppm (about 2.5 minutes/year) within a range of-40 to 85 deg.c, with a built-in high stability 32KHz temperature compensated crystal oscillator, time calendar. The programmable frequency output (1 Hz,1024Hz and 32768H) functions, which in the present invention are programmed to be 1Hz.

The transmission module 35 may be a bluetooth transmission, specifically a DX-BT 23.5.0 bluetooth module. The DX-BT23 module supports BT5.0BLE protocols, and meanwhile, the device with BLE Bluetooth function is directly connected, so that transparent transmission can be directly carried out through a direct serial port (UART).

The detection module 36 includes various sensors, such as voltage, current sensors, and the like.

When the pile is charged by direct current, the voltage sensor adopts a resistor voltage divider with the accuracy of 0.1 percent and the current sensor adopts a current divider with the accuracy of 0.1 percent;

When the pile is an alternating-current charging pile, the voltage sensor is a power frequency voltage transformer with accuracy of 0.1 percent and a power frequency current transformer with accuracy of 0.1 percent.

The working principle of the invention is as follows: referring to fig. 3, the bf609 and its peripheral device reads the sampling value of the AD acquisition module through the SPI interface, reads the calendar of the RTC clock through the TWI interface, and converts the period and the count value of PPS (pulse per second) of the RTC clock through the timer (TIME 1), thereby obtaining a local clock with a resolution of ns level, and the local clock is used as the calibration TIME stamp of the charging pile.

The 10 ns-level local clock is realized by reading the calendar (year, month, day, time, minute and second) of the RTC clock through two signal lines (SCL/SDA) of the TWI bus of the BF609 and the peripheral thereof, and the ns time scale is realized by collecting the PPS signal output by the clock through the timing Timer 1. The ns time scale is implemented as follows: BF609 and its peripheral TIME1 have two registers, one for recording the count value (COUTER) at the TIME from the PPS rising edge and one for automatically measured PERIOD value (PERIOD). BF609 and its peripheral TIME1 have a clock frequency of 100MHz and COUTER resolution of 10ns. So the start time for (second pulse) PPS is

The local accurate clock is a calendar of the reading of the RTC clock and a nanosecond value read by a timer, including year, month, day, time, minute, second and nanosecond.

The internal block diagram of the device is shown in fig. 4, for zero crossing clock synchronization.

After BF609 and its peripheral equipment gather AD and gather data 2a, through zero crossing detection algorithm 3b, calculate the zero crossing time scale to through clock message sender 3d and local clock 3f generation clock time to the time message, send wireless bluetooth module through the serial ports, supply to fill electric pile check-up appearance and realize bluetooth accurate time setting.

For electric energy accumulation, BF609 and the peripheral equipment thereof collect AD acquisition data 2a, then active electric energy is calculated through an electric energy accumulation algorithm 3a, virtual pulses and time mark messages thereof are generated through a virtual pulse algorithm generation and message transmitter 3c and a local clock 3f, and 3e is sent to a DX-BT 23.0 Bluetooth module to be subjected to wireless Bluetooth meter calibration through a serial port and simultaneously sent to a charging pile body for display of the charging pile body.

Zero-crossing clock synchronization task program execution as shown in fig. 5, the zero-crossing clock synchronization task and the power accumulation task are executed every sampling one point (100 us).

Step one, reading a sampling value of Ua.

Step two, a zero crossing time scale is calculated, as shown in fig. 5, and it is first determined whether the current sample value y _n and the last sample value y _n-1 of Ua are from negative values to positive values.

The time scale calculation of the zero crossing is performed. And if not, exiting the task.

The time scale calculations are shown in fig. 6: the current time scale for sample n is t _n and the current time scale for sample n-1 is t _n-1.

Wherein Ts: for a sampling period, the invention is 100us (the corresponding sampling rate is 10 ksps), and the time scale of the zero crossing point is as follows (3):

And step three, judging whether the transmission time interval is more than 1 second and less than 1 second, and exiting the task. And (3) sending the time mark of the current T _zn calculated in the formula 1 to the charging pile calibrator through Bluetooth after more than 1 second.

The electric energy accumulation task as shown in fig. 7, the electric energy accumulation includes:

And step one, accumulating electric energy by adopting a dot product and algorithm. P _n is the active power of the current sampling point, P _n is the product of the current sampling points of the voltage or current for a direct current charging pile or a single-phase alternating current charging pile, and P _n is the sum of the products of the three-phase voltage and current sampling points for a three-phase alternating current charging pile. The active power value is accumulated according to formula (4) every time one sampling point data is sampled.

Step two, as shown in fig. 7, W1 is the equivalent electrical energy of one pulse. The pulse constant is the inverse of the pulse constant, and the pulse constant is converted into W.S (watt-second) which is converted into W.S (kilowatt-second) by adding a multiplier which is converted into 3600 seconds and converted into 1000W by 1kW, and the sampling virtual pulse mode does not have the problem of frequency resolution of real pulse output, so the pulse constant is set to 10 ¹⁰ imp/kWh, and the invention has the advantages of greatly improving the resolution of the number of pulses, ensuring the accumulated output of the number of pulses at each sampling point and realizing strict synchronization of the calibration table.

C _p is the pulse constant of the active electric energy, in units of 10 ¹⁰ imp/kWh.The unit is W.S (watts.sec). Firstly, judging whether delta E _p is larger than W1, for the power output in a standby state or other smaller power states, if delta E _p is smaller than W1, directly exiting the task when delta E _p is smaller than W1; when Δe _p is greater than W1, the value of LastE _pn is corrected to LastE _pn+ΔE_p. /(I)

Since the pulse constant of the present invention is very large, its value is C _p＝10¹⁰ imp/kWh, for a 3kW ac charging stake, at 5% position, i.e. 3 x 0.05 = 0.15kW = 150W.

The output pulse frequency isWhere P is the average frequency.

41KHz is greater than the sampling rate of 10kHz, so there is no case where DeltaE _p is less than W1 for a normal meter. The fineness of the time synchronization can be ensured to be at least as high as 10kHz, i.e. 100us.

Pulse output press of active electric energyAnd accumulating.

The current active power pulse is recorded, while the current time stamp T _n is recorded. Then enter the third step:

Judging whether the interval of transmission is more than 1 second, and exiting the task in less than 1 second; and (3) transmitting the time scale of T _n and the current pulse accumulated number N through a serial port for more than 1 second. The electric pile body co-charging pile electric energy metering N is sent to the charging pile body through a serial port, and meanwhile, the electric pile electric energy metering N and a time mark T _n are also sent to the electric pile electric energy metering N through a DX-BT 23.0 Bluetooth module.

After the information is obtained, the charging pile to be detected can be checked according to the checking method, and a detection result is obtained. When the accuracy level of the charging pile calibrator is higher than the accuracy level of the charging pile to be detected by two levels, a charging pile calibration method based on virtual pulse output of wireless Bluetooth is shown in fig. 8. In one implementation, the sampling frequencies (also called sampling rates) of the charging pile calibrator and the charging pile electric energy meter to be tested are the same, for example, 10ksps, and of course, other sampling rates can be adopted, but the sampling rate should not be lower than 10ksps. At 10ksps, the sampling task is entered every 100us away. Firstly, executing a clock time setting task, and entering an active electric energy error checking task when the time setting error is less than 1 ms; otherwise, the task is exited.

Fig. 9 is a schematic flow chart of an implementation of a clock tick task according to an embodiment of the present invention, where, as shown in fig. 9, the clock tick task includes the following steps:

Step one, reading a sampling value of Ua.

Step two, as shown in fig. 6, it is determined whether the current sample value y _n and the last sample value y _n-1 of Ua are from negative to positive. If so, performing a time scale calculation of the zero crossing; if not, the task is exited. Wherein the time scale is calculated as in formula (3).

And when a Bluetooth time mark command is received, entering a step III, otherwise, exiting the clock pair time task.

And thirdly, unpacking the received Bluetooth time mark command to obtain a time mark T _zn of the charging pile to be detected.

Calculating clock deviation delta T _z of the charging pile calibrator and the charging pile to be detected according to the following formula (5):

ΔT_z＝T_zn-T_zb (5)；

and (3) adjusting a local clock T _b of the charging pile calibrator according to the following formula (6):

T_b＝T_b+ΔT_z (6)；

Generally, after one clock adjustment, the clock deviation between the local clock of the charging pile calibrator and the detected charging pile can be controlled within 0.2 ms. After a plurality of adjustments, the actual error can be controlled within 0.1 ms.

And after the clock is timed, entering an active power error checking task. Fig. 10 is a schematic flow chart of an implementation of an active power error checking task according to an embodiment of the present invention, where the task includes the following steps:

step one, as the electric energy accumulation algorithm of the to-be-detected charging pile shown in fig. 7, the charging pile calibrator also adopts dot product sum algorithm to accumulate electric energy. P _bn is the active power of each sampling point of the charging pile calibrator, which is the product of the current sampling points of the voltage and the current, and the sum of the products of the three-phase voltage and the current sampling points for the three-phase alternating current charging pile.

Every time data of a sampling point is sampled, the active power value is accumulated according to a formula (7):

Wherein E _bpn is the active energy of the charging pile calibrator at the nth sampling point, E _bpn-1 is the active energy of the charging pile calibrator at the (i.e. last) n-1 sampling point, P _bn is the active power of the charging pile calibrator at the nth sampling point, T _s is the sampling period (the value can be 100us in the invention), and DeltaE _bp is the difference between the active energy of the charging pile calibrator output last time and the active energy output this time, and LastE _bpn is the active energy of the charging pile calibrator output last time.

Step two, the same as the charging pile to be detected, W1 is the equivalent electric energy of one pulse,The pulse constant C _p was 10 ¹⁰ imp/kWh.

Firstly, judging whether delta E _bp is larger than W1, and directly exiting the task when delta E _bp is smaller than W1; when delta E _bp is larger than W1, the pulse constant of the invention is very large, and the value is C _p＝10¹⁰ imp/kWh, so that pulse output can be ensured at each sampling point under the normal calibration, and when delta E _bp is larger than W1, the value of LastE _bpn is corrected to LastE _bpn+ΔE_bp.

Pulse output press of active electric energyAnd accumulating, wherein N _b is the current active electric energy pulse number of the charging pile calibrator.

Recording the current active power pulse and simultaneously recording the current time mark T _n, wherein the current pulse and the time mark are stored in a buffer area which is not lower than 10 seconds, namely a history buffer area with 10k×10=10 ten thousand points, and entering the step three.

And step three, judging whether the Bluetooth receives the pulse electric energy accumulated value and the time mark of the detected charging pile. When the pulse accumulated value and the time scale of the detected charging pile are received, the active power verification error is calculated according to the diagram shown in fig. 11.

As shown in fig. 11, when calculating the active power calibration error, the detected charging pile transmits the power accumulated pulse number N _n and the time scale T _n of the charging pile once every 1 second, the charging pile calibrator stores the power accumulated pulse number N _bn and the time scale T _bn according to the sampling interval of 100us in the second step, and according to the time scale T _bn of the charging pile calibrator closest to the time scale T _n found in the history buffer of the charging pile calibrator by the time scale T _n of the detected charging pile, the power pulse accumulated pulse number N _bn of the calibrator corresponding to T _bn is taken out.

According to a time mark T _n-10000 (the sampling rate is 10ksps and the time is transmitted once in 1 second) of the last received detected charging pile, searching a time mark T _bn-10000 of the charging pile calibrator closest to T _n-10000 in a history buffer area of the charging pile calibrator, taking out a power pulse accumulated pulse number N _bn-10000 of the calibrator corresponding to T _bn-10000, and calculating an active power error according to the formula (1).

Since the time synchronization error can be accurate to within 0.2ms (milliseconds), the error caused by synchronization within 1s (seconds) is 0.2ms/1 s=0.02%. Compared with a 1-level charging pile, the invention can realize error verification of a detection point in 1 second.

The wireless time synchronization of different equipment with 200us level can be realized by the combination of the built-in clock with 10ns resolution level established by the zero-crossing time scale of the voltage (Ua) and the RTC and the second pulse thereof and the clock synchronization, and the transmission delay of Bluetooth is only within 20 mS. Normally the bluetooth transmission delay does not exceed 10ms. The ultra-high frequency pulse method meter calibration is realized by using virtual pulses (the pulse constant is 10 ¹⁰ imp/kWh, the frequency is up to 694MHz for a 250kVA charging pile), due to the high pulse resolution, the number of pulses of active electric energy is changed within 100us time, and the rapid detection of the active electric energy within 1 second time can be realized by matching with the large-capacity electric energy buffer data and time scale buffer data of the charging pile calibrator, and the synchronous error is less than 200us/1 s=0.02%.

The beneficial results of the invention are as follows: compared with the traditional low-frequency pulse method, the method has the advantages that measurement variation caused by the non-synchronization of the low-frequency pulse method does not exist, the detection variation of the low-frequency pulse method is large under the on-site dynamic load, the detection requirement can be met only by long (2 minutes) test time, and the measurement variation of 0.02% can be achieved only by 1 second for short test time. Compared with the traditional low-frequency pulse method, the method does not need wiring or collecting through a photoelectric collector, the wiring brings potential safety hazard on site and additional workload, the photoelectric collection is easy to receive sunlight interference, the method does not need wiring or a photoelectric head, and the method is safe and convenient in a non-contact mode. Compared with the method that the current majority of charging piles read the electric energy of the charging piles through the screen of the charging piles or the APP mobile phone screen to manually compare with the electric energy of the charging pile calibrator, the electric energy error verification can be carried out in 2 hours, and the invention can provide 0.02% of asynchronous error in 1 second, so that the electric energy error verification is rapid and effective. And by adopting an ultrahigh frequency pulse method, the pulse parameters (10 ¹⁰ imp/kWh) of one electric energy meter are compatible with all specifications of charging piles, so that the design is simplified, and the management cost is reduced. The quick detection method can be suitable for quick detection of the charging pile under the distortion load of the charging site.

An embodiment of the present invention further provides a verification apparatus applied to a charging pile, fig. 12 is a schematic structural diagram of the verification apparatus provided in the embodiment of the present invention, as shown in fig. 12, where the verification apparatus 1200 includes:

The obtaining module 1201 is configured to obtain, in response to a received verification request for verifying a charging pile to be detected, a reference information table, where the reference information table is used to store a reference accumulated pulse number of electric energy and a reference time scale, where the reference accumulated pulse number and the reference time scale are obtained by sampling electric energy of the reference charging pile and have a corresponding relationship;

The receiving module 1202 is configured to receive first to-be-detected information and second to-be-detected information sent by the to-be-detected charging pile at different moments, where the first to-be-detected information includes a first to-be-detected accumulated pulse number and a first to-be-detected time scale, and the second to-be-detected information includes a second to-be-detected accumulated pulse number and a second to-be-detected time scale;

A first determining module 1203, configured to determine a first reference accumulated pulse number and a second reference accumulated pulse number according to the first to-be-detected time stamp, the second to-be-detected time stamp, and a reference time stamp in the reference information table;

the second determining module 1204 is configured to determine and output a verification result of the charging pile to be tested according to the first number of accumulated pulses to be tested, the second number of accumulated pulses to be tested, the first number of accumulated pulses to be referenced and the second number of accumulated pulses to be referenced.

In some embodiments, the obtaining module 1201 is further configured to:

The first determining module 1203 is further configured to:

In some embodiments, the obtaining module 1201 is further configured to:

In some embodiments, the verification apparatus 1200 further comprises:

and the third determining module is used for determining and outputting prompt information of failed inspection when the first information to be inspected and/or the second information to be inspected are not received, or when the energy difference is smaller than or equal to single-pulse equivalent energy, or when the time setting error is larger than or equal to a preset error threshold value.

It should be noted here that: the description of the embodiment items of the verification device above, which is similar to the description of the method above, has the same advantageous effects as the embodiment of the method. For technical details not disclosed in the embodiments of the verification device of the present invention, those skilled in the art will understand with reference to the description of the embodiments of the method of the present invention.

It should be noted that, in the embodiment of the present invention, if the method is implemented in the form of a software functional module, and sold or used as a separate product, the method may also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in essence or a part contributing to the prior art in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, an optical disk, or other various media capable of storing program codes. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Accordingly, an embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the verification method provided in the above embodiment.

An embodiment of the present application provides a verification device applied to a charging pile, fig. 13 is a schematic diagram of a composition structure of the verification device provided by the embodiment of the present application, other exemplary structures of the verification device 1300 may be foreseen according to the exemplary structure of the verification device 1300 shown in fig. 13, so that the structures described herein should not be considered as limitations, for example, some components described below may be omitted, or components not described below may be added to adapt to specific requirements of some applications.

The verification apparatus 1300 shown in fig. 13 includes: a processor 1301, at least one communication bus 1302, a user interface 1303, at least one external communication interface 1304, and a memory 1305. Wherein the communication bus 1302 is configured to enable connected communication between these components. The user interface 1303 may include a display screen, and the external communication interface 1304 may include a standard wired interface and a wireless interface, among others. Wherein the processor 1301 is configured to execute a program of the verification method stored in the memory, so as to implement the steps in the verification method provided in the above embodiment.

The above description of the embodiment of the verification device and the storage medium applied to the charging stake is similar to the description of the embodiment of the method described above, with similar advantageous effects as the embodiment of the method. For technical details not disclosed in the embodiments of the verification device and the storage medium of the present invention, please refer to the description of the method embodiments of the present invention for understanding.

The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A method for verifying a charging pile, the method comprising:

determining and outputting a verification result of the charging pile to be detected according to the first accumulated pulse number to be detected, the second accumulated pulse number to be detected, the first reference accumulated pulse number and the second reference accumulated pulse number;

The obtaining the reference information table in response to the received verification request for verifying the charging pile to be detected comprises the following steps:

Storing the reference accumulated pulse number and the reference time mark corresponding to each piece of sampling information to obtain a reference information table;

The sampling information at least comprises active electric energy and active power;

When the energy difference is larger than the single-pulse equivalent energy, determining a reference accumulated pulse number and a reference time mark corresponding to each piece of sampling information according to the single-pulse equivalent energy, the sampling period and the active power included in each piece of sampling information;

the method for obtaining the sampling information of the reference charging pile comprises the steps of responding to a received verification request for verifying the charging pile to be detected, sampling the reference electric energy of the reference charging pile according to a preset sampling period to obtain a plurality of sampling information, and comprises the following steps:

When the time setting error is smaller than a preset error threshold, determining that the accuracy grade of the reference charging pile accords with the verification precision, and sampling the reference electric energy of the reference charging pile according to a preset sampling period to obtain a plurality of sampling information;

The step of responding to the received verification request for verifying the charging pile to be detected, adjusting the reference clock of the reference charging pile according to the clock to be detected of the charging pile to be detected, and obtaining an adjusted reference clock comprises the following steps:

When the first sampling voltage value is smaller than a preset voltage threshold value and the second sampling voltage value is larger than the preset voltage threshold value, adjusting the reference clock of the reference charging pile according to the to-be-detected clock of the to-be-detected charging pile to obtain an adjusted reference clock;

the step of adjusting the reference clock of the reference charging pile according to the to-be-detected clock of the to-be-detected charging pile to obtain an adjusted reference clock comprises the following steps:

2. The method of claim 1, wherein the method further comprises:

3. A verification device for a charging stake, the device comprising:

The second determining module is used for determining and outputting a checking result of the charging pile to be checked according to the first accumulated pulse number to be checked, the second accumulated pulse number to be checked, the first reference accumulated pulse number and the second reference accumulated pulse number;

4. A verification device for a charging stake, the device comprising:

A memory for storing executable instructions;

A processor for implementing the method of any one of claims 1 to 2 when executing executable instructions stored in said memory.

5. A charging pile, characterized in that the charging pile comprises:

The control module is connected with the charging pile body, the acquisition module, the clock module, the transmission module and the detection module and is used for controlling the charging pile body, the acquisition module, the clock module, the transmission module and the detection module to realize the method of any one of claims 1 to 2.