CN110609250B - Batch calibration method for electric quantity metering circuits - Google Patents
Batch calibration method for electric quantity metering circuits Download PDFInfo
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- CN110609250B CN110609250B CN201910857459.6A CN201910857459A CN110609250B CN 110609250 B CN110609250 B CN 110609250B CN 201910857459 A CN201910857459 A CN 201910857459A CN 110609250 B CN110609250 B CN 110609250B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The invention discloses a batch calibration method of an electric quantity metering circuit in the technical field of electric quantity metering circuits, which comprises calibration hotspot judgment and production heat measuring point judgment, wherein the calibration hotspot judgment and the production heat measuring point judgment are firstly carried out in normal starting, and then the calibration hotspot judgment and the production heat measuring point judgment are respectively carried out; the invention adopts the same materials and processes in batches through batch calibration logic, can adopt a batch calibration method, only needs to extract one calibration, and writes the calibrated value into other equipment in the same batch by a serial port or other modes to achieve the aim of calibration, has high production efficiency and is convenient for mass production.
Description
Technical Field
The invention relates to the technical field of electric quantity metering circuits, in particular to a batch calibration method of an electric quantity metering circuit.
Background
The wrong wiring of the electric energy metering device restricts the safe operation of a power grid and the smooth development of electric energy settlement work. The normal operation of the electric energy metering device is the primary content in the electric energy metering work, determines the technical level of personnel of an electric power unit, also influences the safe operation of a power grid and the smooth development of electric energy settlement work, and further determines the relationship between the electric power unit and users thereof and the future sustainable development of an electric power enterprise. Considering the possible negligence of the installation personnel in the usual work, the technical level and other factors, the problem of wrong wiring of the electric energy metering device is inevitable. Whether the electric energy metering device is correctly installed can be judged by checking whether the circuit is qualified through an electric energy metering and identifying mechanism, and the electric energy metering device is calibrated through the calculation of the amount of the returned electricity. However, most of the calibration methods in the market at present are one-by-one calibration of single equipment, so that the production efficiency is low, and the mass production is not convenient. Based on this, the invention designs a batch calibration method of an electric quantity metering circuit to solve the above problems.
Disclosure of Invention
The present invention is directed to a batch calibration method for an electricity metering circuit, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a batch calibration method of an electric quantity metering circuit comprises calibration hotspot judgment and production and measurement hotspot judgment, and specifically comprises the following steps:
first, start
Normally starting, and respectively carrying out calibration hot spot judgment and production heat measurement point judgment;
second, calibration hotspot determination
Stp1, if there is no calibration hot spot, restart until there is a calibration hot spot; if the calibration point exists, directly entering a calibration mode;
stp2, recording calibration data for standby after calibration is completed;
thirdly, judging the heat measuring point of the product
Stp1, if there is no hot spot, restart until there is hot spot; if the production testing hot spot exists, printing information through the serial port;
stp2, determining whether it is calibrated
If not, writing numerical values into the serial port, and printing calibration success information; if the calibration is finished, judging whether to recalibrate;
stp3, determining whether to recalibrate
If the calibration needs to be carried out again, the serial port writes a numerical value, prints calibration success information and then stops power supply; and if the recalibration is not needed, the direct power-off is finished.
Preferably, in the serial port printing information in the third step, the printing of the uncalibrated information is uncalibrated, and the printing of the calibrated data is calibrated.
Preferably, the calibration comprises a load resistor, a WiFi device, an ammeter and a WiFi module, wherein the positive and negative electrodes of the load resistor are electrically connected with the positive and negative electrodes of the WiFi device, the positive and negative electrodes of the WiFi device are electrically connected with the positive and negative electrodes of the ammeter, and the positive and negative electrodes of the ammeter are electrically connected with the positive and negative electrodes of the WiFi module through 485.
Preferably, the positive electrode and the negative electrode of the load resistor are electrically connected with the positive electrode and the negative electrode of the WiFi equipment through the live wire L and the zero line N-1 respectively, and the positive electrode and the negative electrode of the WiFi equipment are electrically connected with the positive electrode and the negative electrode of the ammeter through the live wire L and the zero line N respectively.
Preferably, the electricity meter comprises a 485 protocol electricity meter.
Preferably, the value that the wiFi equipment waited to calibrate uses the ammeter as the standard, the accurate numerical value is obtained from the ammeter through 485 agreements to the wiFi module, then sends the wiFi equipment to in step through WiFi, this group of numerical value of wiFi equipment record file is as accurate numerical value, and the calibration is accomplished.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts the same materials and processes in batches through batch calibration logic, can adopt a batch calibration method, only needs to extract one calibration, and writes the calibrated value into other equipment in the same batch by a serial port or other modes to achieve the aim of calibration, has high production efficiency and is convenient for mass production.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a diagram of a calibration circuit according to the present invention.
FIG. 3 is a circuit diagram according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a batch calibration method of an electric quantity metering circuit comprises calibration hotspot judgment and production and measurement hotspot judgment, and specifically comprises the following steps:
first, start
Normally starting, and respectively carrying out calibration hot spot judgment and production heat measurement point judgment;
second, calibration hotspot determination
Stp1, if there is no calibration hot spot, restart until there is a calibration hot spot; if the calibration point exists, directly entering a calibration mode;
stp2, a load is connected to WiFi equipment to be calibrated, the WiFi equipment is connected to an ammeter, the positive and negative poles of a load resistor are electrically connected with the positive and negative poles of the WiFi equipment through a live line L and a zero line N-1 respectively, the positive and negative poles of the WiFi equipment are electrically connected with the positive and negative poles of the ammeter through the live line L and the zero line N respectively, the calibrated value is based on the high-precision ammeter, a WiFi module obtains an accurate value from the ammeter through a 485 protocol and then sends the accurate value to the WiFi equipment through WiFi synchronization, the WiFi equipment records and archives the group of values as accurate values, calibration is completed, calibration data is recorded and reserved after calibration is completed, and direct power failure is completed;
thirdly, judging the heat measuring point of the product
Stp1, if there is no hot spot, restart until there is hot spot; if the production testing hot spot exists, printing information through the serial port, printing uncalibrated information in an uncalibrated mode, and printing calibrated data in a calibrated mode;
stp2, determining whether it is calibrated
If not, writing numerical values into the serial port, and printing calibration success information; if the calibration is finished, judging whether to recalibrate;
stp3, determining whether to recalibrate
If the calibration needs to be carried out again, the serial port writes a numerical value, prints calibration success information and then stops power supply; and if the recalibration is not needed, the direct power-off is finished.
One specific application of this embodiment is:
taking the metering chip BL0937 as an example, a first pin of the chip BL0937 is electrically connected to VCC-3.3V, a capacitor C16 and a capacitor C26 are connected in parallel to the first pin of the chip BL0937, cathodes of the capacitor C16 and the capacitor C26 are both grounded, a resistor R20 and a resistor R21 are respectively connected in series to a second pin and a third pin of the chip BL0937, a resistor R22 is connected in parallel between the resistor R20 and the resistor R21, the negative electrode of the resistor R22 is grounded, the positive electrode of the resistor R20 is connected in parallel with the capacitor C28, the negative electrode of the capacitor C28 is grounded, the positive electrode of the resistor R21 is connected in parallel with the capacitor C29, the negative electrode of the capacitor C29 is grounded, the fourth pin of the chip BL0937 is respectively connected in series with the resistor R15, the resistor R16, the resistor R17 and the resistor R18, the positive electrode of the resistor R18 is connected in parallel with the resistor R19 and the capacitor C25, the negative electrodes of the resistor R19 and the capacitor C25 are grounded, the fifth pin of the chip BL0937 is grounded, and the sixth pin and the seventh pin of the chip BL0937 are respectively connected in series with the resistor R9 and the resistor R10.
The L live wire input is divided by a resistor and then is supplied to a measuring chip to test voltage, and a sampling resistor is connected between the N zero line and the N-1 zero line output in series and is used for sampling the current of an actual load. The voltage, current and power information is given to the MCU (single chip microcomputer or other microcontrollers) through BL _ SEL/BL _ CF _ V/BL _ CF _ P.
The above is batch calibration logic, the same materials and processes are adopted in batches, a batch calibration method can be adopted, and after one calibration is extracted, the calibrated value is written into other equipment in the same batch by a serial port or other modes, so that the calibration purpose is achieved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (1)
1. A batch calibration method of an electric quantity metering circuit comprises calibration hotspot judgment and production and measurement hotspot judgment, and is characterized by comprising the following specific steps:
first, start
Normally starting, and respectively carrying out calibration hot spot judgment and production heat measurement point judgment;
second, calibration hotspot determination
Stp1, if there is no calibration hot spot, restart until there is a calibration hot spot; if the calibration point exists, directly entering a calibration mode;
stp2, recording calibration data for standby after calibration is completed;
thirdly, judging the heat measuring point of the product
Stp1, if there is no hot spot, restart until there is hot spot; if the production testing hot spot exists, printing information through the serial port;
stp2, determining whether it is calibrated
If not, writing numerical values into the serial port, and printing calibration success information; if the calibration is finished, judging whether to recalibrate;
stp3, determining whether to recalibrate
If the calibration needs to be carried out again, the serial port writes a numerical value, prints calibration success information and then stops power supply; if the direct power-off is finished without the need of recalibrating, the third step is to print uncalibrated information and calibrated printing calibration data in the serial port printing information;
the calibration comprises a load resistor, WiFi equipment, an ammeter and a WiFi module, wherein the positive and negative electrodes of the load resistor are electrically connected with the positive and negative electrodes of the WiFi equipment, the positive and negative electrodes of the WiFi equipment are electrically connected with the positive and negative electrodes of the ammeter through 485 connection, the positive and negative electrodes of the load resistor are respectively electrically connected with the positive and negative electrodes of the WiFi equipment through a live wire L and a zero wire N-1, the positive and negative electrodes of the WiFi equipment are respectively electrically connected with the positive and negative electrodes of the ammeter through a live wire L and a zero wire N, the ammeter comprises a 485 protocol ammeter, the value to be calibrated of the WiFi equipment is determined by the ammeter, the WiFi module acquires accurate values from the ammeter through a 485 protocol, and then the accurate values are synchronously sent to the WiFi equipment through WiFi, the WiFi equipment records and files the set of values as accurate values, and the calibration is completed.
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| CN201910857459.6A CN110609250B (en) | 2019-09-11 | 2019-09-11 | Batch calibration method for electric quantity metering circuits |
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| CN201910857459.6A CN110609250B (en) | 2019-09-11 | 2019-09-11 | Batch calibration method for electric quantity metering circuits |
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| CN110609250B true CN110609250B (en) | 2022-03-29 |
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| CN102590784B (en) * | 2012-03-14 | 2014-08-13 | 沈阳时尚实业有限公司 | Single-phase intelligent energy meter distributed correction method |
| CN102928812B (en) * | 2012-11-22 | 2015-08-19 | 深圳市航天泰瑞捷电子有限公司 | The calibration steps of electric energy meter and device |
| CN103698734A (en) * | 2013-10-25 | 2014-04-02 | 广西电网公司电力科学研究院 | Method for testing virtual failures of intelligent ammeter based on simulation |
| CN204990682U (en) * | 2015-09-02 | 2016-01-20 | 保定市宇创电气科技有限公司 | On --spot detector in batches of low pressure power consumption |
| CN204945366U (en) * | 2015-09-11 | 2016-01-06 | 国网江西省电力公司赣东北供电分公司 | A kind of wirelessly transmitting electrical energy metering on-site calibration device |
| CN105353828B (en) * | 2015-12-04 | 2018-04-06 | 上海斐讯数据通信技术有限公司 | A kind of interchanger on-off testing system and method with time calibration function |
| CN108445439B (en) * | 2018-03-28 | 2020-11-24 | 芯海科技（深圳）股份有限公司 | Electric energy metering calibration device and calibration method |
| CN108693497A (en) * | 2018-06-14 | 2018-10-23 | 浙江正泰仪器仪表有限责任公司 | A kind of correction method of electric energy meter, electric energy meter and meter correcting system |
| CN109917323A (en) * | 2019-04-18 | 2019-06-21 | 青岛高科通信股份有限公司 | A kind of adjustment controlling means of intelligent electric meter |
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