CN111028495A - Method and device for calibrating electric energy meter based on low-power-consumption Bluetooth communication - Google Patents
Method and device for calibrating electric energy meter based on low-power-consumption Bluetooth communication Download PDFInfo
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- G08—SIGNALLING
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Abstract
The invention discloses a method and a device for calibrating an electric energy meter based on low-power-consumption Bluetooth communication, and belongs to the technical field of wireless communication. The method comprises the following steps: the verification platform body obtains a Bluetooth address of the electric energy meter to be verified, and directionally configures a connection address for connection according to the Bluetooth address of the electric energy meter; the verification table body carries out directional scanning on the Bluetooth address of the electric energy meter to be verified, and connection with the electric energy meter to be verified is established through the connection address and the Bluetooth address; the verification stage body sends a meter starting and checking command to the electric energy meter to be verified through the Bluetooth, after the verification stage body receives the response frame, the private wireless working mode is switched to, the verification stage body starts to check, and the electric energy meter to be verified is verified. The technology related by the invention can adapt to the verification of the next generation multi-core modularized intelligent electric energy meter under the condition of not adding new platform body equipment, and is not weaker than the existing auxiliary terminal mode in verification precision and verification capacity.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a method and a device for calibrating an electric energy meter based on low-power-consumption Bluetooth communication.
Background
When the current intelligent electric energy meter is checked on a table body or an automatic line, a common communication mode is RS485, a pulse output mode is an auxiliary terminal, in the design of the next generation of multi-core modular intelligent electric energy meter, an auxiliary terminal is removed, Bluetooth replaces RS485 communication, LED light pulse replaces auxiliary terminal pulse, under the background, if the pulse receiving device is changed into the optical signal receiving head by the platform body or the automatic line, the problems of high modification cost, long period and difficult hole alignment of optical signals exist, in order to reduce the equipment modification cost and difficulty and to be compatible with the existing platform body or automatic line verification mode as much as possible, the method considers that the Bluetooth data transmission and reception are used for replacing the signal output and reception of the original auxiliary terminal, and simultaneously the standard Bluetooth communication function is kept, the pulse signal detection is realized, and meanwhile, the rapid data interaction through the Bluetooth between the electric energy meter and the table body and between the automatic lines is still supported.
The Bluetooth works in the range of 2.4G-2.48G frequency bands, 2M is taken as a step, the whole working frequency band is divided into 40 channels, the communication anti-collision under a multi-Bluetooth working scene is realized through a channel frequency hopping mechanism of a software protocol stack, the Bluetooth frequency hopping mechanism is provided with a dynamic delay synchronization function, the maximum delay between physical layer data frames can reach 10ms and is not fixed, and the requirement of electric energy meter verification cannot be met when the standard Bluetooth sends pulse data to realize precision verification. For the metrological pulse verification, taking 10(100) a as an example, assuming that the pulse constant is 1200imp/kWh, under the condition of 1.2Imax, the pulse time is 113ms each, and the pulse interval is 50ms according to the pulse width of 60ms, which means that 50 μ s can cause 0.01% error, 10ms can cause 2% error, and the maximum limit of 2-level watt-meter error verification is exceeded. For the daily timing pulse of the electric energy meter, the requirement is more strict, and 0.115 mu s can cause the daily timing error of 0.01 s/d. Based on the reasons, the pulse verification of the electric energy meters is not feasible in technology by using a standard Bluetooth protocol stack, and meanwhile, when a plurality of electric energy meters simultaneously transmit wireless signals based on Bluetooth antennas, occasional same-frequency channel conflicts can exist to cause the situation of data pulse loss.
In summary, the electric energy meter with the bluetooth function realizes the bluetooth pulse verification function, and at least two core problems of bluetooth pulse signal delay error transmission and bluetooth channel conflict should be solved, so as to satisfy the requirement of simultaneously checking the meter with multiple meter positions.
Disclosure of Invention
Aiming at the problems, the invention provides a method for calibrating an electric energy meter based on low-power-consumption Bluetooth communication, which comprises the following steps:
the verification platform body obtains a Bluetooth address of the electric energy meter to be verified, and directionally configures a connection address for connection according to the Bluetooth address of the electric energy meter;
the verification table body carries out directional scanning on the Bluetooth address of the electric energy meter to be verified, and connection with the electric energy meter to be verified is established through the connection address and the Bluetooth address;
the verification stage body sends a meter starting and checking command to the electric energy meter to be verified through the Bluetooth, after the verification stage body receives the response frame, the private wireless working mode is switched to, the verification stage body starts to check, and the electric energy meter to be verified is verified.
Optionally, the method further comprises:
and expanding a plurality of nonstandard channels by preset steps for the electric energy meter to be calibrated.
Optionally, the method further includes:
initializing the electric energy meter to be verified, setting the Bluetooth address of the electric energy meter, and broadcasting the Bluetooth address.
Optionally, the method further includes:
after receiving the meter starting and checking command, the electric energy meter to be checked analyzes the meter starting and checking command to acquire Bluetooth pulse frequency, outputs a Bluetooth pulse signal with the same Bluetooth pulse frequency, generates a response frame according to the Bluetooth pulse signal and switches the response frame into a private wireless working mode;
optionally, the method further includes: after the verification table body starts verification, the verification table body outputs verification signals, after the electric energy meter to be detected receives the verification signals, the Bluetooth pulse signals are transmitted to the verification table body by using a non-standard channel, and the Bluetooth pulse signals of the electric energy meter to be detected are controlled to be constant-frequency power.
Optionally, after the verification stage body receives the response frame, analyzing the response frame to generate analysis information;
the parsing information includes: communication information, clock pulse signals, active pulse signals, reactive pulse signals and harmonic pulse signals.
Optionally, the communication information is transmitted through an RS485 interface of the verification stage body.
The invention also provides a device for calibrating the electric energy meter based on the low-power-consumption Bluetooth communication, which comprises the following components:
the Bluetooth module is used for acquiring a Bluetooth address of the electric energy meter to be verified, directionally configuring a connection address for connection according to the Bluetooth address of the electric energy meter, directionally scanning the Bluetooth address of the electric energy meter to be verified, establishing connection with the electric energy meter to be verified through the connection address and the Bluetooth address, sending a meter starting and checking command to the electric energy meter to be verified, switching to a private working mode after receiving a response frame of the electric energy meter to be verified, and transmitting the response frame to the interface module;
the interface module receives the response frame, analyzes the response frame, acquires analysis information and transmits the analysis information to the meter calibration platform body;
and the meter calibration platform body starts calibration according to the analytic information and calibrates the electric energy meter to be calibrated.
Optionally, parsing the information includes: communication information, clock pulse signals, active pulse signals, reactive pulse signals and harmonic pulse signals.
Optionally, the interface module includes:
the RS485 interface transmits communication signals;
the clock interface is used for transmitting clock pulse information;
the active pulse interface transmits the active pulse interface;
the reactive pulse interface is used for transmitting the reactive pulse interface;
harmonic pulse interface and transmission harmonic pulse interface
And the power interface is connected with a power supply.
The technology related by the invention can adapt to the verification of the next generation multi-core modularized intelligent electric energy meter under the condition of not adding new platform body equipment, and is not weaker than the existing auxiliary terminal mode in verification precision and verification capacity.
Drawings
FIG. 1 is a flow chart of a method for calibrating an electric energy meter based on Bluetooth low energy communication according to the present invention;
FIG. 2 is a schematic diagram of a method for calibrating an electric energy meter based on Bluetooth low energy communication according to the present invention, which uses Bluetooth pulse transmission signals for calibration;
fig. 3 is a structural diagram of a device for calibrating an electric energy meter based on bluetooth low energy communication according to the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The invention is used for realizing the batch rapid verification of the metering and daily timing precision of the electric energy meter on a platform body or an automatic line through Bluetooth.
In order to realize the pulse transmission with low time delay, the invention directly sends data on a physical layer in a mode of designating a frequency channel, realizes the pulse transmission with low time delay and expands the number of the Bluetooth working channels so as to meet the common verification requirement of a plurality of epitopes, and simultaneously solves the problems of high time delay, precision jump, channel conflict and the like when a plurality of epitopes simultaneously use the standard Bluetooth technology to detect the meters after an auxiliary terminal of an intelligent electric energy meter is cancelled by controlling the Bluetooth transmitting power and implementing the Bluetooth private protocol and the standard protocol to be cross-multiplexed.
The invention provides a method for detecting an electric energy meter based on low-power-consumption Bluetooth communication, which comprises the following steps of:
expanding a plurality of nonstandard channels for the electric energy meter to be detected in preset steps;
initializing the electric energy meter to be verified, setting a Bluetooth address of the electric energy meter, and broadcasting the Bluetooth address;
the verification platform body obtains a Bluetooth address of the electric energy meter to be verified, and directionally configures a connection address for connection according to the Bluetooth address of the electric energy meter;
the verification table body carries out directional scanning on the Bluetooth address of the electric energy meter to be verified, and connection with the electric energy meter to be verified is established through the connection address and the Bluetooth address;
the verification platform body sends a meter detection starting command to the electric energy meter to be detected through Bluetooth, and after receiving the response frame, the verification platform body is switched to a private wireless working mode;
after receiving the meter starting and checking command, the electric energy meter to be checked analyzes the meter starting and checking command to acquire Bluetooth pulse frequency, outputs a Bluetooth pulse signal with the same Bluetooth pulse frequency, generates a response frame according to the Bluetooth pulse signal and switches the response frame into a private wireless working mode;
the verification table body starts verification, the verification table body outputs verification signals after the verification table body starts verification, the electric energy meter to be detected transmits Bluetooth pulse signals to the verification table body by using a non-standard channel after receiving the verification signals, the Bluetooth pulse signals of the electric energy meter to be verified are controlled to be constant-frequency power, and the electric energy meter to be verified is verified according to the Bluetooth pulse signals of the electric energy meter to be verified with the constant-frequency power.
If the Bluetooth pulse signal of the electric energy meter to be calibrated is received within the preset time of the calibrating platform body, determining that the electric energy meter to be calibrated has no fault;
and if the Bluetooth pulse signal of the electric energy meter to be detected is not received within the preset time of the detecting table body, determining one or more of the fault of the electric energy meter to be detected, the fault of the detecting table body and the fault of the connection fault Dun.
When the verification platform body receives the response frame, analyzing the response frame to generate analysis information;
the parsing information includes: communication information, clock pulse signals, active pulse signals, reactive pulse signals and harmonic pulse signals.
And the communication information is transmitted by using an RS485 interface of the verification table body.
The invention uses Bluetooth pulse to transmit signals for verification, and the schematic diagram is shown in figure 2;
the Bluetooth of the platform body (a multi-meter platform body or an automatic line) and the Bluetooth of the electric meter are verified, the Bluetooth mode needs to be switched to the private wireless meter calibration mode, and radio frequency parameters are configured, mainly frequency points, access addresses and other parameters.
The Bluetooth module of the electric energy meter to be detected is configured with a corresponding pulse input GPIO port as an interrupt edge triggering mode, the interrupt mode is higher in real-time performance than a polling mode, and the transmitted delay error (less than 1 mu s) is very small. When a pulse signal is input, the Bluetooth module of the electric meter detects the rising edge and the falling edge of the pulse through the GPIO port, then the Bluetooth module of the electric meter respectively takes different digital signals for the rising edge and the falling edge according to the corresponding pulse types in an interrupt function (for example, the rising edge of an active pulse is 0x06, the falling edge of the active pulse is 0x05, the rising edge of a reactive pulse is 0x16, the falling edge of a reactive pulse is 0x15, the rising edge of a forward harmonic pulse is 0x26, the falling edge of the forward harmonic pulse is 0x25, the rising edge of a reverse harmonic pulse is 0x36, the falling edge of the reverse harmonic pulse is 0x35, the rising edge of a clock pulse is 0x50, and the falling edge of the clock pulse is 0x51), loads the Bluetooth PHY, and sends the signals to the Bluetooth end of the platform body.
After the Bluetooth of the verification table body receives the data, the electric level is output on the corresponding pin according to different data, and the condition that the restored signal is consistent with the original signal is guaranteed.
The invention solves the problem of anti-collision of Bluetooth pulse:
besides 40 channels in the standard 2.4G-2.48G frequency band range, the electric energy meter to be verified additionally expands a plurality of non-standard channels for the Bluetooth module, the non-standard channels are mainly concentrated between 2.36G-2.4G and 2.48G-2.5G, the non-standard channels can be stepped by 1M or 2M, and the non-standard channels and the standard channels are used for being uniformly distributed to different epitopes and different platforms, so that the channels in a small space range are ensured not to conflict.
When the state of the electric energy meter is controlled, the transmitting power of the Bluetooth module of the electric energy meter to be detected is controlled to be in the minimum state, and the effective communication distance is ensured not to exceed 1 meter, so that channel conflicts can be prevented from occurring on a plurality of platforms or the automatic detection line of the electric energy meter.
Through distributing the signal channel and controlling the transmitting power, can guarantee the pulse signal basically not to conflict, but in the practical application process, the interference is inevitable, in order to prevent the signal channel conflict under the extreme condition, add a kind of dynamic adjustment signal channel and time delay adjustment mechanism in the bluetooth anti-collision mechanism, when the platform body or automatic line finds that the pulse signal has the loss phenomenon, and the repetition check still has the pulse to lose the condition, the platform body or automatic line will start the spare channel, spare channel and current distributed signal channel need have certain interval, can switch over 3 times. When the allocated channel and the standby channel conflict, a delay adjustment mechanism is started, a delay parameter is sent to the electric energy meter Bluetooth module, the electric energy meter Bluetooth module receives an electric energy meter pulse signal and then sends the pulse in a delay mode through software, the pulse is sent in a delay mode, generally, the typical value is 2ms as stepping, repeated try is carried out for many times, and if the interference cannot be effectively avoided after the delay is adjusted, the electric energy meter is considered to be in fault or the meter detection environment is considered to be not in accordance with the verification requirement.
The Bluetooth verification needs to bypass the work of a Bluetooth standard protocol stack to realize low-delay pulse transmission, but in the verification process of a platform body or an automatic line, besides metering pulse and daily timing, a large amount of data needs to be communicated through Bluetooth, and in order to meet the coexistence requirements of pulse verification and Bluetooth communication, an anti-collision mechanism realizes flexible interactive multiplexing of a private protocol and a standard Bluetooth protocol on software. The electric energy meter defaults to close the private protocol after being electrified, the standard Bluetooth protocol is started, the table body realizes data communication through Bluetooth communication, the electric energy meter is controlled to enter the private protocol state when pulse detection is carried out, meanwhile, Bluetooth standard connection is disconnected, a frequency hopping mechanism is closed, and after the pulse detection is finished, the table body is controlled to be electrified again through the private protocol or the automatic line of the table body to restore the default protocol state.
When the electric energy meter is calibrated in a Bluetooth communication mode, because the communication mode of the conventional intelligent electric energy meter calibrating device is commonly used as RS485, a Bluetooth-RS 485 platform body tool needs to be added and the platform body is modified, wherein the Bluetooth communication protocol added for calibrating the electric energy meter needs to be added.
Install bluetooth and change RS485 stage body frock on existing intelligent ammeter calibrating installation, an epitope pairs a bluetooth and changes RS485 stage body frock, and bluetooth changes RS485 stage body frock input power adopts DC5V, 4 way signals of output: one path of RS485, one path of clock, one path of active pulse, one path of reactive pulse and one path of harmonic wave, and 2.54mm double-row sockets are used.
The method can be used for multi-epitope detection:
the Bluetooth working mode is changed into a private wireless working mode, and wireless frequency setting is as follows: in order to realize a unified meter calibration and meter detection process, a meter calibration command can be sent through a standard 698 frame expanded by a new generation of electric energy meter [ method 128 of F20B ], a Bluetooth working mode is changed into a private wireless working mode, and simultaneously, wireless frequency is fixed to realize frequency setting, so that the problems of automatic Bluetooth frequency hopping and frequency band occupation interference are solved.
And (3) reducing power: after the electric energy meter management core receives the command of starting and calibrating the meter, the MODE pin of the electric energy meter Bluetooth module is set to be at a low level, so that the electric energy meter Bluetooth module is in a factory MODE, and the electric energy meter Bluetooth module is set to have the lowest sending power in the factory MODE.
The transmission power of the Bluetooth of the platform body is always the lowest, and the transmission and receiving coupling parameters are adjusted according to the field condition, so that the Bluetooth of the platform body and the Bluetooth of the electric energy meter can only communicate within 1 meter.
The invention also provides a device for calibrating the electric energy meter based on the low-power-consumption Bluetooth communication, as shown in fig. 3, comprising:
the Bluetooth module is used for acquiring a Bluetooth address of the electric energy meter to be verified, directionally configuring a connection address for connection according to the Bluetooth address of the electric energy meter, directionally scanning the Bluetooth address of the electric energy meter to be verified, establishing connection with the electric energy meter to be verified through the connection address and the Bluetooth address, sending a meter starting and checking command to the electric energy meter to be verified, switching to a private working mode after receiving a response frame of the electric energy meter to be verified, and transmitting the response frame to the interface module;
the interface module receives the response frame, analyzes the response frame, acquires analysis information and transmits the analysis information to the meter calibration platform body;
and the meter calibration platform body starts calibration according to the analytic information and calibrates the electric energy meter to be calibrated.
Parsing information, including: communication information, clock pulse signals, active pulse signals, reactive pulse signals and harmonic pulse signals.
An interface module, comprising:
the RS485 interface transmits communication signals;
the clock interface is used for transmitting clock pulse information;
the active pulse interface transmits the active pulse interface;
the reactive pulse interface is used for transmitting the reactive pulse interface;
harmonic pulse interface and transmission harmonic pulse interface
And the power interface is connected with a power supply.
The technology related by the invention can adapt to the verification of the next generation multi-core modularized intelligent electric energy meter under the condition of not adding new platform body equipment, and is not weaker than the existing auxiliary terminal mode in verification precision and verification capacity.
Claims (10)
1. A method for calibrating an electric energy meter based on bluetooth low energy communication, the method comprising:
the verification platform body obtains a Bluetooth address of the electric energy meter to be verified, and directionally configures a connection address for connection according to the Bluetooth address of the electric energy meter;
the verification table body carries out directional scanning on the Bluetooth address of the electric energy meter to be verified, and connection with the electric energy meter to be verified is established through the connection address and the Bluetooth address;
the verification stage body sends a meter starting and checking command to the electric energy meter to be verified through the Bluetooth, after the verification stage body receives the response frame, the private wireless working mode is switched to, the verification stage body starts to check, and the electric energy meter to be verified is verified.
2. The method of claim 1, further comprising:
and expanding a plurality of nonstandard channels by preset steps for the electric energy meter to be calibrated.
3. The method of claim 1, further comprising:
initializing the electric energy meter to be verified, setting the Bluetooth address of the electric energy meter, and broadcasting the Bluetooth address.
4. The method of claim 1, further comprising:
after receiving the starting meter checking command, the electric energy meter to be checked analyzes the starting meter checking command to acquire Bluetooth pulse frequency, outputs Bluetooth pulse signals with the same Bluetooth pulse frequency, generates a response frame according to the Bluetooth pulse signals, and switches to a private wireless working mode.
5. The method of claim 1, further comprising: after the verification table body starts verification, the verification table body outputs verification signals, after the electric energy meter to be detected receives the verification signals, the Bluetooth pulse signals are transmitted to the verification table body by using a non-standard channel, and the Bluetooth pulse signals of the electric energy meter to be detected are controlled to be constant-frequency power.
6. The method according to claim 1, wherein after the verification stage body receives the response frame, the response frame is analyzed to generate analysis information;
the parsing information includes: communication information, clock pulse signals, active pulse signals, reactive pulse signals and harmonic pulse signals.
7. The method of claim 6, wherein the communication is transmitted using an RS485 interface of the assay platform.
8. An apparatus for calibrating an electric energy meter based on bluetooth low energy communication, the apparatus comprising:
the Bluetooth module is used for acquiring a Bluetooth address of the electric energy meter to be verified, directionally configuring a connection address for connection according to the Bluetooth address of the electric energy meter, directionally scanning the Bluetooth address of the electric energy meter to be verified, establishing connection with the electric energy meter to be verified through the connection address and the Bluetooth address, sending a meter starting and checking command to the electric energy meter to be verified, switching to a private working mode after receiving a response frame of the electric energy meter to be verified, and transmitting the response frame to the interface module;
the interface module receives the response frame, analyzes the response frame, acquires analysis information and transmits the analysis information to the meter calibration platform body;
and the meter calibration platform body starts calibration according to the analytic information and calibrates the electric energy meter to be calibrated.
9. The apparatus of claim 8, the parsing information, comprising: communication information, clock pulse signals, active pulse signals, reactive pulse signals and harmonic pulse signals.
10. The apparatus of claim 8, the interface module, comprising:
the RS485 interface transmits communication signals;
the clock interface is used for transmitting clock pulse information;
the active pulse interface transmits the active pulse interface;
the reactive pulse interface is used for transmitting the reactive pulse interface;
harmonic pulse interface and transmission harmonic pulse interface
And the power interface is connected with a power supply.
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| CN112598895B (en) * | 2020-11-16 | 2023-05-19 | 中国电力科学研究院有限公司 | System and method for preventing multichannel conflict during verification of electric energy meter |
| CN112671476A (en) * | 2020-12-18 | 2021-04-16 | 南方电网电力科技股份有限公司 | Wireless pulse-per-second transmission method and system with fixed time delay |
| CN112700632A (en) * | 2020-12-23 | 2021-04-23 | 南方电网电力科技股份有限公司 | Method and system for transmitting wireless metering pulse in multiple channels |
| CN112702082A (en) * | 2020-12-25 | 2021-04-23 | 国网浙江省电力有限公司营销服务中心 | Channel frequency hopping method of large-scale verification system of wireless pulse mode metering equipment |
| CN112782640A (en) * | 2020-12-30 | 2021-05-11 | 深圳市科陆精密仪器有限公司 | Method and device for calibrating intelligent electric energy meter |
| CN112969165A (en) * | 2021-01-26 | 2021-06-15 | 中国电力科学研究院有限公司 | Multi-channel anti-collision method and system for electric energy meter verification |
| CN113064115A (en) * | 2021-04-27 | 2021-07-02 | 安徽南瑞中天电力电子有限公司 | Electric energy meter calibration tool based on low-power-consumption Bluetooth communication and meter calibration method thereof |
| CN113064115B (en) * | 2021-04-27 | 2024-06-04 | 安徽南瑞中天电力电子有限公司 | Electric energy meter calibrating tool and method based on low-power consumption Bluetooth communication |
| CN114401503A (en) * | 2022-01-17 | 2022-04-26 | 南方电网电力科技股份有限公司 | Bluetooth meter checking connection method and related device for intelligent electric meter |
| CN114401503B (en) * | 2022-01-17 | 2024-01-09 | 南方电网电力科技股份有限公司 | Bluetooth meter checking connection method and related device of intelligent electric meter |
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