CN111157774A - Single-phase multi-rate electric energy meter with Bluetooth module - Google Patents
Single-phase multi-rate electric energy meter with Bluetooth module Download PDFInfo
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- CN111157774A CN111157774A CN202010160300.1A CN202010160300A CN111157774A CN 111157774 A CN111157774 A CN 111157774A CN 202010160300 A CN202010160300 A CN 202010160300A CN 111157774 A CN111157774 A CN 111157774A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/56—Special tariff meters
- G01R11/57—Multi-rate meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
- H04Q2209/43—Arrangements in telecontrol or telemetry systems using a wireless architecture using wireless personal area networks [WPAN], e.g. 802.15, 802.15.1, 802.15.4, Bluetooth or ZigBee
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/60—Arrangements in telecontrol or telemetry systems for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter
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Abstract
The invention relates to a single-phase multi-rate electric energy meter with a Bluetooth module, which is connected between a user load and a single-phase alternating current power supply; the current sampling module and the voltage sampling module respectively collect an analog current signal and an analog voltage signal; the metering unit converts the analog current signal and the analog voltage signal into a digital current signal and a digital voltage signal through an internal analog/digital converter; obtaining real-time active power according to the digital current signal and the digital voltage signal, and converting the active power into electric energy pulse; the microcontroller determines time data corresponding to the electric energy pulse, and counts the electric energy pulse according to the corresponding charging time interval to obtain a pulse statistic value of each charging time interval; obtaining electric energy data of each charging time interval according to the pulse statistic value of each charging time interval and a preset pulse constant; the microcontroller sends the electric energy data to the Bluetooth module; the Bluetooth module sends the electric energy data to the wireless terminal equipment connected with the Bluetooth module.
Description
Technical Field
The invention relates to the technical field of electric energy metering, in particular to a single-phase multi-rate electric energy meter with a Bluetooth module.
Background
With the development of science and technology, the electric power industry becomes an important part of the science and technology development, the basic life of people cannot leave electric energy, and the electricity utilization and metering are an essential link.
However, in many places, a traditional meter reading mode is used, namely, the electric meter is checked by knocking one by one, which not only wastes a lot of manpower, but also is not beneficial to data aggregation and data transmission, is easy to cause data loss and confusion, and is very not beneficial to the development of modern electric power utilities.
The communication mode of the common single-phase intelligent electric energy meter in the market is mainly to use an RS485 line and an infrared or low-voltage power line carrier to communicate with a terminal or a collector. The 485 bus is an economical and traditional industrial bus mode used for equipment networking, the communication quality of the 485 bus can be guaranteed only by debugging and testing according to construction experience, the 485 bus is simple, but wiring must be strictly carried out according to installation and construction specifications, and existing power lines are utilized for carrier data communication. The infrared meter reading needs a meter reading palm machine, the price is high, and the reading software cannot be used universally according to different palm machine models. The meter reading success rate of the low-voltage power line carrier communication is low, the communication speed is low, routing equipment needs to be installed on site, the application range is small, and the cost is high.
Therefore, it is very necessary to provide an electric energy meter which can remotely read the meter and has high meter reading success rate.
Disclosure of Invention
The invention aims to provide a single-phase multi-rate electric energy meter with a Bluetooth module aiming at the defects of the prior art, and aims to improve the meter reading success rate of the electric energy meter, remotely read the data of the electric energy meter and save manpower and material resources.
In order to achieve the above object, the present invention provides a single-phase multi-rate electric energy meter with a bluetooth module, the single-phase multi-rate electric energy meter being connected between a user load and a single-phase ac power supply, comprising: the device comprises a current sampling module, a voltage sampling module, a display module, a metering unit, a microcontroller, a clock chip and a Bluetooth module;
one end of the current sampling unit is connected with a live wire of the single-phase alternating current power supply through a current transformer and a manganin sampling resistor, and the other end of the current sampling unit is connected with a current input end of the metering unit; one end of the voltage sampling unit is connected with a zero line of the single-phase alternating-current power supply through a divider resistor, and the other end of the voltage sampling unit is connected with a voltage input end of the metering unit; the output end of the metering unit is connected with the pulse signal input end of the microcontroller; the clock chip is connected with a clock signal input end of the microcontroller and provides a clock signal for the microcontroller; the output end of the microcontroller is respectively connected with the display module and the Bluetooth module;
the current sampling module and the voltage sampling module respectively collect an analog current signal and an analog voltage signal which are accessed to the user load and send the analog current signal and the analog voltage signal to the metering unit;
the metering unit converts the analog current signal and the analog voltage signal into a digital current signal and a digital voltage signal through an internal analog/digital (A/D) converter and sends the digital current signal and the digital voltage signal to the microcontroller;
the microcontroller calculates according to the digital current signal and the digital voltage signal to obtain real-time active power, and converts the active power into electric energy pulses;
the microcontroller receives a clock signal sent by the clock chip, determines time data corresponding to the electric energy pulse, and calls a corresponding counting unit in the microcontroller to count and count the electric energy pulse according to a charging period corresponding to the time data to obtain a pulse counting value of each charging period;
the microcontroller obtains the electric energy data of each charging time interval according to the pulse statistic value of each charging time interval and a preset pulse constant;
the microcontroller sends the electric energy data to the display module for output display; and/or
The microcontroller sends the electric energy data to the Bluetooth module through a UART port; the Bluetooth module sends the electric energy data to wireless terminal equipment connected with the Bluetooth module through a Bluetooth communication protocol, and the electric energy data is output and displayed through the wireless terminal equipment.
Preferably, the single-phase multi-rate electric energy meter further includes: a power module and an AC-DC transformer;
the input end of the power supply module is connected with the AC-DC transformer, and the output end of the power supply module is respectively connected with the power supply input end of the microcontroller and the Bluetooth module, so as to respectively provide power supplies for the microcontroller and the Bluetooth module.
Preferably, the single-phase multi-rate electric energy meter further includes: a data storage module;
the output end of the microcontroller is also connected with the data storage module;
and when the time data is preset time, the microcontroller sends the electric energy data to a data storage module for storage, and the stored electric energy data accumulated to the preset time in each charging period is obtained.
Preferably, the microcontroller extracts a first amount of the stored electric energy data closest to the current time based on a set statistical cycle, and calculates the stage electric energy data of each charging period according to the first amount of the stored electric energy data;
the microcontroller calculates according to the stage electric energy data of each charging period and the corresponding rate data of each charging period to obtain the charge information of each charging period in the statistical cycle;
the microcontroller collects the expense information to obtain total expense information;
the microcontroller sends the stage electric energy data, the cost information and the total cost information of each charging period of the counting period to the data storage module through the UART port; and/or
The microcontroller sends the stage electric energy data, the cost information and the total cost information of each charging period of the counting period to the Bluetooth module through the UART port; and the Bluetooth module sends the stage electric energy data, the charge information and the total charge information of each charging period of the counting period to a wireless terminal device connected with the Bluetooth module through a Bluetooth communication protocol, and the wireless terminal device outputs and displays the data.
Preferably, the single-phase multi-rate electric energy meter further includes: a photoelectric isolator;
the output end of the microcontroller is also connected with the photoelectric isolator.
Further preferably, the microcontroller of the single-phase multi-rate electric energy meter is connected with the meter calibration device through the photoelectric isolator; the user load is a fixed load;
the meter calibrating equipment calculates according to preset standard current data and the digital current signal to obtain current compensation data, and stores the current compensation data into the meter calibrating data storage module in the meter calibrating equipment;
the meter calibrating equipment calculates according to preset standard voltage data and the digital voltage signal to obtain voltage compensation data, and stores the voltage compensation data into the meter calibrating data storage module;
the meter calibrating equipment respectively compensates the digital current signal and the digital voltage signal according to the current compensation data and the voltage compensation data to obtain corrected current data and corrected voltage data, and sends the corrected current data and the corrected voltage data to the microcontroller;
and the microcontroller obtains corrected electric energy data according to the corrected current data and the corrected voltage data.
Preferably, when the voltage data acquired by the microcontroller is smaller than a first preset threshold value, generating a power failure record, and sending the power failure record to a data storage module for storage;
and when the voltage data acquired by the microcontroller is greater than a second preset threshold value, generating a power-on record, and sending the power-on record to a data storage module for storage.
Preferably, the single-phase multi-rate electric energy meter further comprises a standby power supply;
the standby power supply is electrically connected with the clock chip.
According to the single-phase multi-rate electric energy meter with the Bluetooth module, the Bluetooth module is adopted to transmit data and the double power supplies are used for supplying power, the terminal equipment can be used for directly reading the related data in the electric energy meter, wiring is not needed, a large amount of manpower and material resources are saved, and the meter reading success rate of the electric energy meter is improved.
Drawings
Fig. 1 is a block diagram of a single-phase multi-rate electric energy meter with a bluetooth module according to an embodiment of the present invention;
fig. 2 is a flowchart of an output method of electric energy data of a single-phase multi-rate electric energy meter with a bluetooth module according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
According to the single-phase multi-rate electric energy meter with the Bluetooth module, the Bluetooth module is adopted to transmit data and the double power supplies are used for supplying power, so that related data in the electric energy meter can be read wirelessly, wiring is not needed, a large amount of manpower and material resources are saved, and the meter reading success rate and the meter reading efficiency of the electric energy meter are improved.
Fig. 1 is a block diagram of a single-phase multi-rate electric energy meter with a bluetooth module according to an embodiment of the present invention, which shows a structure of the electric energy meter and a connection relationship between each component. Fig. 2 is a flowchart of an output method of electric energy data of a single-phase multi-rate electric energy meter with a bluetooth module according to an embodiment of the present invention, which illustrates a process of converting an electric energy meter into electric energy data according to a current analog signal and a voltage analog signal collected in real time. The technical solution of the present invention is described in detail below with reference to fig. 1 and 2.
First, a structure of a single-phase multi-rate electric energy meter with a bluetooth module according to an embodiment of the present invention is described.
As shown in fig. 1, the single-phase multi-rate electric energy meter is connected between a user load and a single-phase ac power source, and includes: the device comprises a current sampling module, a voltage sampling module, a display module, a metering unit, a microcontroller, a clock chip and a Bluetooth module.
One end of the current sampling unit is connected with a live wire of a single-phase alternating current power supply through a current transformer and a manganin sampling resistor, the other end of the current sampling unit is connected with a current input end of the metering unit, and the current sampling unit is used for collecting analog current signals after being connected to a user load. One end of the voltage sampling unit is connected with a zero line of the single-phase alternating current power supply through a divider resistor, the other end of the voltage sampling unit is connected with a voltage input end of the metering unit, and the voltage sampling unit is used for collecting analog voltage signals after the analog voltage signals are connected to a user load. The output end of the metering unit is connected with the pulse signal input end of the microcontroller and used for providing pulse signals for the microcontroller. The clock chip is connected with the clock signal input end of the microcontroller and provides clock signals for the microcontroller. The output end of the microcontroller is connected with the display module and the Bluetooth module respectively.
In a preferred embodiment, the single-phase multi-rate electric energy meter with a bluetooth module further comprises: the device comprises a power supply module, an Alternating Current-Direct Current (AC-DC) transformer, a data storage module, a photoelectric isolator and a standby power supply.
The input end of the power supply module is connected with the AC-DC transformer, and the output end of the power supply module is respectively connected with the power supply input end of the microcontroller and the Bluetooth module to respectively provide power supplies for the microcontroller and the Bluetooth module. The output end of the microcontroller is connected with the data storage module, and the output end of the microcontroller is also connected with the photoelectric isolator and is connected with the meter calibration equipment through the photoelectric isolator. The photoelectric isolator can protect the electric energy meter and prevent internal devices of the electric energy meter from being damaged by static electricity. It should be noted that, in calibrating the meter, the user load is a fixed load. The standby power supply is electrically connected with the clock chip and used for ensuring that the clock chip still normally works when power failure occurs.
In a further preferred embodiment, one end of the current sampling unit is connected with zero of the single-phase alternating current power supply through the current transformer and the manganin sampling resistor, and the other end of the current sampling unit is connected with the current input end of the metering unit. Under the normal working condition, the current data collected by the two current sampling units respectively arranged on the live wire and the zero wire are the same, and the directions are different. When the data of the two current sampling units are inconsistent, the abnormal conditions such as power theft and the like can exist.
The output flow of the electric energy data of the single-phase multi-rate electric energy meter with the bluetooth module based on the above structure is specifically described as follows, as shown in fig. 2:
and step 110, the current sampling module and the voltage sampling module respectively collect the analog current signal and the analog voltage signal after the user load is accessed, and send the analog current signal and the analog voltage signal to the metering unit.
Specifically, after a user load is connected, the current sampling unit and the voltage sampling unit collect analog current signals and analog voltage signals of the unidirectional alternating current power supply in real time, and send the collected data to the metering unit.
And step 130, the microcontroller calculates according to the digital current signal and the digital voltage signal to obtain real-time active power, and converts the active power into electric energy pulses.
Specifically, the power factor angle is the difference between the initial phase angles of the voltage and current phasors, which is numerically equal to the phase of the sinusoidal voltage minus the phase of the sinusoidal current. The microcontroller firstly obtains a cosine value of a power factor angle, namely a power factor according to the analog current signal and the analog voltage signal. And then multiplying the digital current signal, the digital voltage signal and the power factor to obtain active power. The active power is converted into electric energy pulses which are in direct proportion to the active power through a voltage frequency converter integrated on the microcontroller.
Specifically, in this embodiment, 4 different charging periods are used as an example: 22:00-6:00,0.3 yuan/degree; 6:00-12:00,0.5 yuan/degree; 12:00-17:00,0.4 yuan/degree; 17:00-22:00,0.6 yuan/degree. The microcontroller receives a clock signal sent by the clock chip in real time, determines current time data according to the clock signal, such as 6:00 in 1 st/2 th of a month, then determines a corresponding charging time interval, 0.5 yuan/degree, calls a corresponding charging unit to count the electric energy pulse, and counts the electric energy pulse until 12:00 in 1 st/2 th of the month to obtain an accumulated electric energy pulse statistical value, such as 1000.
And 150, the microcontroller obtains the electric energy data of each charging period according to the pulse statistic value of each charging period and a preset pulse constant.
Specifically, the microcontroller performs the electric energy calculation according to the ratio of the pulse statistic value to the preset pulse constant in this embodiment. For example, the preset pulse constant is 1000, and it can be known from the above-mentioned electric energy pulse statistical value 1000 that 1 degree of electricity is consumed by 6:00-12:00 in 1 day of 2 months, and 1 is added on the basis of 99 degrees of electric energy data accumulated in the original time interval.
After the electric energy data are obtained, the electric energy meter can display and output the electric energy data locally, and can also realize wireless data output of the electric energy data to external receiving equipment through a Bluetooth module in a wireless sending mode.
The method for locally displaying and outputting the power data may be as in step 160.
And step 160, the microcontroller sends the electric energy data to the display module for output and display.
Specifically, the display module outputs and displays the continuously accumulated electric energy data corresponding to each charging time interval and each charging time interval, and the electric energy data is not cleared. For example: 22:00-6:00,200 degrees; 00,100 degrees at 6:00-12:00,100 degrees; 12:00-17:00,300 degrees; 17:00-22:00,400 degrees.
The wireless data output may be implemented as in steps 170 and 171.
Wherein the UART (not shown in the figure) is integrated on the microcontroller.
Step 160 and step 170 may be performed simultaneously or in either case.
And 171, the Bluetooth module sends the electric energy data to the wireless terminal equipment connected with the Bluetooth module through a Bluetooth communication protocol, and the electric energy data is output and displayed through the wireless terminal equipment.
In a preferred embodiment, when the time data is the preset time, the microcontroller sends the electric energy data to the data storage module for storage, so as to obtain the stored electric energy data accumulated to each charging period of the preset time. The preset time is uniformly set according to the user requirement, and can be weekly, monthly or quarterly.
In a further preferred scheme, the microcontroller extracts a first quantity of stored electric energy data closest to the current time based on a set statistical cycle, and calculates the stage electric energy data of each charging period according to the first quantity of stored electric energy data. And the microcontroller calculates according to the stage electric energy data of each charging period and the corresponding rate data of each charging period to obtain the charge information of each charging period in the statistical period. And the microcontroller collects the cost information to obtain total cost information. And the microcontroller sends the stage electric energy data, the charge information and the total charge information of each charging period of the counting period to the data storage module through the UART port. And/or the microcontroller sends the stage electric energy data, the charge information and the total charge information of each charging period of the counting period to the Bluetooth module through the UART port. The Bluetooth module sends the stage electric energy data, the charge information and the total charge information of each charging period of the statistical cycle to the wireless terminal equipment connected with the Bluetooth module through a Bluetooth communication protocol, and the wireless terminal equipment outputs and displays the data.
Specifically, at zero time of 15 days, e.g., 3 months, the microcontroller extracts two stored electrical energy data.
2 month, 15 days zero: 22:00-6:00,300 degrees; 00,200 degrees at 6:00-12:00,200 degrees; 12:00-17:00,400 degrees; 17:00-22:00,500 degrees.
3, month and 15 days: 22:00-6:00,310 degrees; 00,210 degrees at 6:00-12:00,210 degrees; 12:00-17:00,410 degrees; 17:00-22:00,510 degrees.
And calculating the two acquired stored electric energy data to obtain the electricity utilization condition in the period from 2 months 15 days to 3 months 15 days. 22:00-6:00,10 degrees; 6:00-12:00,10 degrees; 12:00-17:00,10 degrees; 17:00-22:00,10 degrees. And then according to the corresponding rate, the fees of each time interval are respectively 3 yuan, 5 yuan, 4 yuan and 6 yuan, and the total fee after the sum is 18 yuan. And the microcontroller sends the stage electric energy data, the charge information and the total charge information of each charging period of the statistical cycle to the data storage module and/or the Bluetooth module, and outputs and displays the data, the charge information and the total charge information through the wireless terminal equipment connected with the Bluetooth module.
In one example, the meter calibrating device calculates according to preset standard current data and a digital current signal to obtain current compensation data, and stores the current compensation data in a meter calibrating data storage module inside the meter calibrating device. And the meter calibrating equipment calculates according to preset standard voltage data and the digital voltage signal to obtain voltage compensation data, and stores the voltage compensation data in a meter calibrating data storage module. And the meter calibrating equipment respectively compensates the digital current signal and the digital voltage signal according to the current compensation data and the voltage compensation data to obtain corrected current data and corrected voltage data, and sends the corrected current data and the corrected voltage data to the microcontroller. And the microcontroller obtains corrected electric energy data according to the corrected current data and the corrected voltage data.
Specifically, when the meter calibrating equipment is connected, the user load is a fixed load. For example, after the fixed load is connected, the digital current data is 0.9A, and the digital voltage data is 220.2V. In a standard state, standard current data is 1A after a fixed load is connected, and standard voltage data is 220V. The meter calibration equipment can obtain that the current compensation data is 1A/0.9A and is approximately equal to 1.111 according to the ratio of the standard current data to the digital current data, obtain that the voltage compensation data is 220V/220.2V and is approximately equal to 0.999 according to the ratio of the standard voltage data to the digital voltage data, and store the current compensation data and the voltage compensation data into a meter calibration storage module. And when the load of the user is accessed to normally use power, the microcontroller multiplies the actual digital current data by the current compensation data to obtain correction current data, multiplies the actual digital voltage data by the voltage compensation data to obtain correction voltage data, and obtains correction electric energy data according to the corrected voltage data and the corrected current data, so that the metering error of the electric energy meter is reduced.
In a preferred embodiment, the electric energy meter of the invention can also automatically judge and record the power-down and power-up conditions.
And when the voltage data acquired by the microcontroller is smaller than a first preset threshold value, generating a power failure record, and sending the power failure record to the data storage module for storage. And when the voltage data acquired by the microcontroller is greater than a second preset threshold value, generating a power-on record, and sending the power-on record to the data storage module for storage.
Specifically, the first preset threshold and the second preset threshold are set according to the voltage of the alternating current. For example, when the ac voltage is 220V, the first predetermined threshold is 220 × 75%, and the second predetermined threshold is 220 × 80%. When the microcontroller monitors that the voltage data is smaller than a first preset threshold value, generating a power failure record; and generating a power-on record when the voltage data acquired by the microcontroller is greater than a second preset threshold value in a power-off state.
According to the single-phase multi-rate electric energy meter with the Bluetooth module, the Bluetooth module is adopted to transmit data and the double power supplies are used for supplying power, so that related data in the electric energy meter can be read wirelessly, wiring is not needed, a large amount of manpower and material resources are saved, and the meter reading success rate and efficiency of the electric energy meter are improved.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A single-phase multi-rate electric energy meter with a bluetooth module, wherein the single-phase multi-rate electric energy meter is connected between a user load and a single-phase ac power supply, comprising: the device comprises a current sampling module, a voltage sampling module, a display module, a metering unit, a microcontroller, a clock chip and a Bluetooth module;
one end of the current sampling unit is connected with a live wire of the single-phase alternating current power supply through a current transformer and a manganin sampling resistor, and the other end of the current sampling unit is connected with a current input end of the metering unit; one end of the voltage sampling unit is connected with a zero line of the single-phase alternating-current power supply through a divider resistor, and the other end of the voltage sampling unit is connected with a voltage input end of the metering unit; the output end of the metering unit is connected with the pulse signal input end of the microcontroller; the clock chip is connected with a clock signal input end of the microcontroller and provides a clock signal for the microcontroller; the output end of the microcontroller is respectively connected with the display module and the Bluetooth module;
the current sampling module and the voltage sampling module respectively collect an analog current signal and an analog voltage signal which are accessed to the user load and send the analog current signal and the analog voltage signal to the metering unit;
the metering unit converts the analog current signal and the analog voltage signal into a digital current signal and a digital voltage signal through an internal analog/digital (A/D) converter and sends the digital current signal and the digital voltage signal to the microcontroller;
the microcontroller calculates according to the digital current signal and the digital voltage signal to obtain real-time active power, and converts the active power into electric energy pulses;
the microcontroller receives a clock signal sent by the clock chip, determines time data corresponding to the electric energy pulse, and calls a corresponding counting unit in the microcontroller to count and count the electric energy pulse according to a charging period corresponding to the time data to obtain a pulse counting value of each charging period;
the microcontroller obtains the electric energy data of each charging time interval according to the pulse statistic value of each charging time interval and a preset pulse constant;
the microcontroller sends the electric energy data to the display module for output display; and/or
The microcontroller sends the electric energy data to the Bluetooth module through a UART port; the Bluetooth module sends the electric energy data to wireless terminal equipment connected with the Bluetooth module through a Bluetooth communication protocol, and the electric energy data is output and displayed through the wireless terminal equipment.
2. The single-phase multi-rate electric energy meter with a bluetooth module of claim 1, further comprising: a power module and an AC-DC transformer;
the input end of the power supply module is connected with the AC-DC transformer, and the output end of the power supply module is respectively connected with the power supply input end of the microcontroller and the Bluetooth module, so as to respectively provide power supplies for the microcontroller and the Bluetooth module.
3. The single-phase multi-rate electric energy meter with a bluetooth module of claim 1, further comprising: a data storage module;
the output end of the microcontroller is also connected with the data storage module;
and when the time data is preset time, the microcontroller sends the electric energy data to a data storage module for storage, and the stored electric energy data accumulated to the preset time in each charging period is obtained.
4. The single-phase multi-rate electric energy meter with the Bluetooth module of claim 3, wherein the microcontroller extracts a first number of the stored electric energy data closest to a current time based on a set statistical period, and calculates stage electric energy data for each billing period according to the first number of the stored electric energy data;
the microcontroller calculates according to the stage electric energy data of each charging period and the corresponding rate data of each charging period to obtain the charge information of each charging period in the statistical cycle;
the microcontroller collects the expense information to obtain total expense information;
the microcontroller sends the stage electric energy data, the cost information and the total cost information of each charging period of the counting period to the data storage module through the UART port; and/or
The microcontroller sends the stage electric energy data, the cost information and the total cost information of each charging period of the counting period to the Bluetooth module through the UART port; and the Bluetooth module sends the stage electric energy data, the charge information and the total charge information of each charging period of the counting period to a wireless terminal device connected with the Bluetooth module through a Bluetooth communication protocol, and the wireless terminal device outputs and displays the data.
5. The single-phase multi-rate electric energy meter with a bluetooth module of claim 1, further comprising: a photoelectric isolator;
the output end of the microcontroller is also connected with the photoelectric isolator.
6. The single-phase multi-rate electric energy meter with the Bluetooth module of claim 5, wherein the microcontroller of the single-phase multi-rate electric energy meter is connected with the meter calibration device through the optoelectronic isolator; the user load is a fixed load;
the meter calibrating equipment calculates according to preset standard current data and the digital current signal to obtain current compensation data, and stores the current compensation data into the meter calibrating data storage module in the meter calibrating equipment;
the meter calibrating equipment calculates according to preset standard voltage data and the digital voltage signal to obtain voltage compensation data, and stores the voltage compensation data into the meter calibrating data storage module;
the meter calibrating equipment respectively compensates the digital current signal and the digital voltage signal according to the current compensation data and the voltage compensation data to obtain corrected current data and corrected voltage data, and sends the corrected current data and the corrected voltage data to the microcontroller;
and the microcontroller obtains corrected electric energy data according to the corrected current data and the corrected voltage data.
7. The single-phase multi-rate electric energy meter with the Bluetooth module according to claim 1, wherein when the voltage data acquired by the microcontroller is smaller than a first preset threshold, a power-down record is generated and sent to a data storage module for storage;
and when the voltage data acquired by the microcontroller is greater than a second preset threshold value, generating a power-on record, and sending the power-on record to a data storage module for storage.
8. The single-phase multi-rate electric energy meter with a bluetooth module of claim 1, further comprising a backup power supply;
the standby power supply is electrically connected with the clock chip.
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| CN202010160300.1A CN111157774A (en) | 2020-03-10 | 2020-03-10 | Single-phase multi-rate electric energy meter with Bluetooth module |
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