CN112187263A - AD sampling value compensation coefficient iteration method and system for resistance voltage division sampling technology - Google Patents

AD sampling value compensation coefficient iteration method and system for resistance voltage division sampling technology Download PDF

Info

Publication number
CN112187263A
CN112187263A CN202010884496.9A CN202010884496A CN112187263A CN 112187263 A CN112187263 A CN 112187263A CN 202010884496 A CN202010884496 A CN 202010884496A CN 112187263 A CN112187263 A CN 112187263A
Authority
CN
China
Prior art keywords
sampling value
voltage
compensation coefficient
value
sampling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010884496.9A
Other languages
Chinese (zh)
Other versions
CN112187263B (en
Inventor
王宇
刘晓铭
岳蔚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nari Technology Co Ltd
NARI Nanjing Control System Co Ltd
Original Assignee
Nari Technology Co Ltd
NARI Nanjing Control System Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nari Technology Co Ltd, NARI Nanjing Control System Co Ltd filed Critical Nari Technology Co Ltd
Priority to CN202010884496.9A priority Critical patent/CN112187263B/en
Publication of CN112187263A publication Critical patent/CN112187263A/en
Application granted granted Critical
Publication of CN112187263B publication Critical patent/CN112187263B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/10—Calibration or testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

The invention discloses an AD sampling value compensation coefficient iteration method and system aiming at the resistance voltage division sampling technology, and belongs to the technical field of automation. The method utilizes the automatic iterative algorithm to automatically calculate the compensation coefficient of the AD sampling value, and can effectively solve the problem that the precision of the compensation coefficient of the AD sampling value does not reach the standard due to insufficient precision.

Description

AD sampling value compensation coefficient iteration method and system for resistance voltage division sampling technology
Technical Field
The invention belongs to the technical field of automation, and particularly relates to an AD sampling value compensation coefficient iteration method and system aiming at a resistance voltage division sampling technology.
Background
At present, metering and measuring products are widely applied, and the products have the characteristics of low selling price and large using amount, so the cost control is particularly important for production enterprises. The design mode that traditional product adopted voltage transformer (PT) samples after with voltage conversion, voltage transformer (PT) is sold the price and is higher, be unfavorable for cost control, in order to reduce cost, some measurement and measurement class products have adopted resistance partial pressure sampling technique to sample the voltage, but the individuality difference of resistance is bigger than voltage transformer, in order to guarantee the precision, this AD sampling value compensation coefficient that just requires every device must adjust and calibrate alone, wastes time and energy, must not repay.
In order to solve the problem, the patent provides an automatic iterative algorithm of an AD sampling value compensation coefficient aiming at a resistance voltage division sampling technology.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides an AD sampling value compensation coefficient iteration method aiming at a resistance voltage division sampling technology, and solves the technical problem that different AD sampling value compensation coefficients are required to be adopted among measurement device individuals caused by the difference of sampling resistance and component precision of a sampling loop.
In order to solve the above technical problems, the technical solution of the present invention is as follows.
In a first aspect, the present invention provides an iterative method for compensating coefficients of an AD sampling value for a resistance voltage division sampling technique, which includes the following steps:
acquiring a voltage sampling value;
calculating to obtain an AD sampling value compensation coefficient;
and calculating to obtain a compensated voltage sampling value according to the voltage sampling value and the AD sampling value compensation coefficient.
Further, the calculating to obtain the compensation coefficient of the AD sample value includes:
acquiring a voltage rated value;
acquiring an initial AD sampling value compensation coefficient;
calculating to obtain a first AD sampling value compensation coefficient according to the voltage rated value, the voltage sampling value and the initial AD sampling value compensation coefficient;
calculating to obtain a voltage sampling value after first compensation according to the voltage sampling value and the first AD sampling value compensation coefficient;
calculating the precision of the voltage sampling value according to the voltage sampling value after the first compensation;
and if the precision of the voltage sampling value meets the precision requirement, outputting the first AD sampling value compensation coefficient as a final AD sampling value compensation coefficient.
Further, if the precision of the voltage sampling value does not meet the precision requirement, then:
calculating to obtain the AD sampling value compensation coefficient according to the voltage rated value, the voltage sampling value and the last AD sampling value compensation coefficient;
calculating the precision of the voltage sampling value according to the compensated voltage sampling value;
if the precision of the voltage sampling value meets the precision requirement, the AD sampling value compensation coefficient is used as the final AD sampling value compensation coefficient to be output;
otherwise, the above processes are circulated until the precision of the voltage sampling value reaches the precision requirement or the circulation times reaches the preset value of the circulation calculation times, and the final AD sampling value compensation coefficient is output.
Further, according to the voltage rating, the voltage sampling value and the last compensation coefficient of the AD sampling value, the compensation coefficient of the AD sampling value at this time is calculated, which includes:
calculating to obtain a first AD sampling value compensation coefficient according to the voltage rated value, the voltage sampling value and the last AD sampling value compensation coefficient;
acquiring a next voltage sampling value;
calculating to obtain a second AD sampling value compensation coefficient according to the voltage rated value, the next voltage sampling value and the last AD sampling value compensation coefficient;
and circularly repeating the previous step when the next voltage sampling value is obtained until the cycle times reach the preset value of the average calculation times, and calculating the average value of the compensation coefficients of all the AD sampling values to be used as the final compensation coefficient of the AD sampling value to be output.
Further, the accuracy requirement is 0.2%.
Further, the preset value of the number of times of loop calculation is 5.
Further, the preset value of the number of times of average calculation is 50.
Further, the process of calculating the compensation coefficient of the AD sample value is performed in an interrupt.
Further, the AD sampling value compensation coefficient is stored in a ROM.
In a second aspect, the present invention further provides an AD sampling value compensation coefficient iteration system for a resistance voltage division sampling technique, including:
a voltage sampling value acquisition module configured to acquire a voltage sampling value;
the compensation coefficient calculation module is configured for calculating and obtaining an AD sampling value compensation coefficient;
and the voltage compensation value calculation module is configured to calculate the compensated voltage sampling value according to the voltage sampling value and the AD sampling value compensation coefficient.
In a third aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the iterative method for compensating the AD sample value for the resistance division sampling technique according to the first aspect.
Compared with the prior art, the invention has the following beneficial effects: the AD sampling value compensation coefficient of each measuring device is automatically and independently adjusted, the problem of difference of the AD sampling value compensation coefficients caused by the difference of sampling resistances and component precision of a sampling loop is solved, and the measuring precision of the measuring device can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of a resistive voltage divider sampling circuit;
FIG. 2 is a total flow of calculation of compensation coefficients for the sampled values and the AD sampled values;
fig. 3 is a flow of calculating the compensation coefficient of the AD sample value.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Aiming at the condition that the sampling circuit in FIG. 1 is adopted to sample by using a resistance voltage division sampling technology, when an AD sampling value compensation coefficient is not adopted, a phase voltage UA、UB、UCThe calculation formula of (2) is as follows:
Figure BDA0002655137380000041
Figure BDA0002655137380000042
Figure BDA0002655137380000043
since the precision of the sampling resistor is only 1%, if R2、R4、R6、R8The error of (2) reaches the maximum error, and the phase voltage U can be obtained by calculationA、UB、UCWill also reach 1%, which is not tolerable for measuring devices requiring high precision.
After the compensation coefficient of the AD sampling value is introduced, the phase voltage UA、UB、UCBecomes:
Figure BDA0002655137380000044
Figure BDA0002655137380000045
Figure BDA0002655137380000051
although at this time R2、R4、R6、R8The error of (A) is still possible to reach the maximum error, but the coefficient (U) can be compensated by using the AD sample valueACoe、UBCoe、UCCoe、UNCoe) Opposite phase voltage UA、UB、UCThe value of (A) is compensated, so that the purposes of eliminating errors and improving the precision are achieved.
Based on the analysis, the invention provides a method for calculating the compensation coefficient of the AD sampling value through an iterative algorithm, thereby compensating different sampling resistors by using different compensation coefficients of the AD sampling value, and effectively solving the problem of measurement errors caused by the fact that one set of compensation coefficient of the AD sampling value is used for all the sampling resistors. The equipment adopting the method completely meets the requirements of electrical measurement of the intelligent substation in the aspects of accuracy, sensitivity and stability.
Example 1
The invention relates to an AD sampling value compensation coefficient iteration method aiming at a resistance voltage division sampling technology, a flow chart is shown in figure 2, and the method comprises the following steps:
step 1, acquiring a voltage sampling value;
step 2, calculating an AD sampling value compensation coefficient;
and 3, calculating according to the AD sampling value compensation coefficient and the voltage sampling value to obtain a final compensated voltage D sampling value.
The invention aims at the occasion that the resistance voltage division sampling technology is adopted to replace the common PT sampling technology to sample the voltage. The iterative algorithm is utilized to automatically calculate the AD sampling value compensation coefficient, so that the problem that the AD sampling value compensation coefficient of each device needs to be manually adjusted when the voltage is sampled by adopting a resistance voltage division sampling technology is effectively solved, and the purposes of reducing personnel and improving efficiency are achieved.
An automatic iteration method of an AD sampling value compensation coefficient aiming at a resistance voltage division sampling technology comprises the following processes:
1. sampling value and AD sampling value compensation coefficient calculation total flow
Before the request for calculating the compensation coefficient of the AD sampling value is not triggered, the program calculates the sampling value according to a normal flow, and once the request for calculating the compensation coefficient of the AD sampling value is triggered, the program immediately enters the calculation flow of the compensation coefficient of the AD sampling value. The flow is shown in fig. 2.
2. Iterative computation process of AD sampling value compensation coefficient
The flow is shown in fig. 3. The flow is a sub-flow of the flow 2, the calculation of the compensation coefficient of the AD sampling value is completed, the maximum cycle time is 5 times (the specific time can be determined according to actual needs, for example, the time is 1, 2 or 6), the calculation is continuously performed 50 times each time (the specific time can be determined according to actual needs, for example, the time is 10, 20 or 60), the compensation coefficient of the AD sampling value is an average value of 50 times, the calculation flow is ended when the accuracy requirement is met, if the accuracy requirement cannot be met after 5 cycles, the AD sampling coefficient abnormal alarm is reported and the flow is ended.
The specific algorithm is as follows:
defining variables:
Ue: the voltage rated value is from preset device parameters and is consistent with the voltage to be measured input in use;
ADCoe is an AD sampling value compensation coefficient which is a past empirical value when being used for the first time, or is a saved calculated value of the last time;
ADregister [50] an AD sampling value compensation coefficient temporary register;
Us: phase voltage sampling values, for convenience of description, U is used heresRefers to the phase voltage UA、UB、UCAny one of the phase voltages;
from the formulas 4, 5 and 6, U can be knownsIs a measure of the phase voltage; u shapeeFor the predetermined device parameters, which are consistent with the input voltage to be measured, the ratio of the measured voltage to the rated voltage can be calculated:
Figure BDA0002655137380000061
in order to eliminate random error, ADCoe can take the average value after many times of calculation, in the invention, the average value is taken for 50 times, the ADCoe is used to replace the original ADCoe, thus the measurement error can be corrected, the above-mentioned process is repeated many times, and U can be reachedsApproximation UeThe effect of (1).
There is therefore the following equation:
Figure BDA0002655137380000071
Figure BDA0002655137380000072
from the above analysis, according to the above two formulas, the compensation coefficient of the AD sampling value can be automatically calculated.
Example 2
The invention relates to an AD sampling value compensation coefficient iteration method aiming at a resistance voltage division sampling technology, which can be operated on software in a central processing unit and an FPGA, and comprises the following steps:
first, initialize
Loop, Loop counter, initialized to 0;
i, calculating a counter and initializing to 0;
3, Repeat, namely the number of times of circulating calculation is initialized to 5;
4, Count is the number of times of average calculation, and is initialized to 50;
precision: the device accuracy is derived from preset device parameters and is 0.2% by default.
6.Ue: the voltage rated value is from preset device parameters and is consistent with the voltage to be measured input in use, and the device is electrified and read in;
ADCoe: the AD sampling value compensation coefficient is stored in the ROM, is a past empirical value when being used for the first time, or is a saved calculated value of the last time, and the device is electrified and read in;
ADRegister [50]: an AD sampling value compensation coefficient temporary register which is initialized to 0;
secondly, in the interruption section, the following steps are sequentially executed:
1. calculating a sampling value and an AD sampling value compensation coefficient total flow:
1) reading original data sampled by the FPGA;
2) if a request for calculating the compensation coefficient of the AD sampling value is received, starting the calculation process of the compensation coefficient of the AD sampling value, otherwise, calculating the sampling value by using the existing compensation coefficient ADCoe of the AD sampling value;
2. calculating the total flow of the compensation coefficient of the AD sampling value:
1) when the Loop of the Loop counter is smaller than the Loop calculation times Repeat, entering the next link, otherwise, reporting an alarm of AD coefficient abnormity, and ending the process;
2) calculating the number Count of times that the counter i is smaller than the average value, calculating the compensation coefficient of the AD sampling value by using a formula 7, storing the compensation coefficient in an ADregister [ i ], adding 1 to i, reading the next voltage sampling value, repeating the process until i is larger than or equal to the Count, calculating the average value of the ADregister [50] by using a formula 8, and assigning ADCoe;
3) calculating a voltage sampling value U by using formulas 4, 5 and 6 according to the AD sampling value compensation coefficient ADCoes(Here, U issFinger phase voltage UA、UB、UC) A value of (d);
4) loop counter Loop adds 1;
5) if the voltage sample value U issAccuracy of (2)
Figure BDA0002655137380000081
If Precision requirement Precision of the device is met, writing an AD sampling value compensation coefficient ADCoe into a ROM and exiting the process; if the voltage sample value U issThe error is beyond the error allowed by the device, the Loop of the Loop counter is smaller than the Repeat of the Loop calculation times, and the sampling value compensation coefficient ADCoe is replaced by the value obtained by calculation and returns to 1) the link to start the calculation of the next Loop;
the method can achieve ideal effects in the measuring equipment adopting the resistance voltage division sampling technology, and is convenient to realize in a central processing unit and an FPGA (field programmable gate array) taking a DSP (digital signal processor) as a core CPU (central processing unit), and the measuring equipment adopting the iteration method to calculate the compensation coefficient of the AD sampling value completely meets the requirements of the measuring device in the aspects of precision, reliability, sensitivity and stability.
Example 3
In a second aspect, the present invention further provides an AD sampling value compensation coefficient iteration system for a resistance voltage division sampling technique, including:
a voltage sampling value acquisition module configured to acquire a voltage sampling value;
the compensation coefficient calculation module is configured for calculating and obtaining an AD sampling value compensation coefficient;
and the voltage compensation value calculation module is configured to calculate the compensated voltage sampling value according to the voltage sampling value and the AD sampling value compensation coefficient.
The specific function of each module is realized by referring to embodiment 1 and embodiment 2.
In a third aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the iterative method for compensating the AD sample value for the resistance division sampling technique according to the first aspect.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. An AD sampling value compensation coefficient iteration method for a resistance voltage division sampling technology is characterized by comprising the following processes:
acquiring a voltage sampling value;
calculating to obtain an AD sampling value compensation coefficient;
and calculating to obtain a compensated voltage sampling value according to the voltage sampling value and the AD sampling value compensation coefficient.
2. The method of claim 1, wherein the calculating the compensation factor of the AD sample according to the resistive voltage division sampling technique comprises:
acquiring a voltage rated value;
acquiring an initial AD sampling value compensation coefficient;
calculating to obtain a first AD sampling value compensation coefficient according to the voltage rated value, the voltage sampling value and the initial AD sampling value compensation coefficient;
calculating to obtain a voltage sampling value after first compensation according to the voltage sampling value and the first AD sampling value compensation coefficient;
calculating the precision of the voltage sampling value according to the voltage sampling value after the first compensation;
and if the precision of the voltage sampling value meets the precision requirement, outputting the first AD sampling value compensation coefficient as a final AD sampling value compensation coefficient.
3. The iterative method for compensating the AD sample value for the resistive voltage division sampling technique according to claim 2, further comprising, if the accuracy of the voltage sample value does not meet the accuracy requirement:
calculating to obtain the AD sampling value compensation coefficient according to the voltage rated value, the voltage sampling value and the last AD sampling value compensation coefficient;
calculating the precision of the voltage sampling value according to the compensated voltage sampling value;
if the precision of the voltage sampling value meets the precision requirement, the AD sampling value compensation coefficient is used as the final AD sampling value compensation coefficient to be output;
otherwise, the above processes are circulated until the precision of the voltage sampling value reaches the precision requirement or the circulation times reaches the preset value of the circulation calculation times, and the final AD sampling value compensation coefficient is output.
4. The method of claim 3, wherein the step of calculating the compensation coefficient of the AD sampling value according to the voltage rating, the voltage sampling value and the compensation coefficient of the last AD sampling value comprises:
calculating to obtain a first AD sampling value compensation coefficient according to the voltage rated value, the voltage sampling value and the last AD sampling value compensation coefficient;
acquiring a next voltage sampling value;
calculating to obtain a second AD sampling value compensation coefficient according to the voltage rated value, the next voltage sampling value and the last AD sampling value compensation coefficient;
and circularly repeating the previous step when the next voltage sampling value is obtained until the cycle times reach the preset value of the average calculation times, and calculating the average value of the compensation coefficients of all the AD sampling values to be used as the final compensation coefficient of the AD sampling value to be output.
5. The iterative method for compensating the coefficient of the AD sample for the resistive voltage division sampling technique as recited in claim 4, wherein the accuracy requirement is 0.2%.
6. The iterative method for compensating the AD sampling value according to claim 4, wherein the number of loop calculations is 5.
7. The iterative method for compensating the AD sampling value according to claim 4, wherein the average value calculation number is preset to 50.
8. The method as claimed in claim 1, wherein the calculation of the compensation factor of the AD sample is performed in an interrupt.
9. The iterative method of claim 1, wherein the AD sample compensation factor is stored in ROM.
10. An AD sampling value compensation coefficient iteration system aiming at a resistance voltage division sampling technology is characterized by comprising:
a voltage sampling value acquisition module configured to acquire a voltage sampling value;
the compensation coefficient calculation module is configured for calculating and obtaining an AD sampling value compensation coefficient;
and the voltage compensation value calculation module is configured to calculate the compensated voltage sampling value according to the voltage sampling value and the AD sampling value compensation coefficient.
CN202010884496.9A 2020-08-28 2020-08-28 AD sampling value compensation coefficient iteration method and system for resistance voltage division sampling technology Active CN112187263B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010884496.9A CN112187263B (en) 2020-08-28 2020-08-28 AD sampling value compensation coefficient iteration method and system for resistance voltage division sampling technology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010884496.9A CN112187263B (en) 2020-08-28 2020-08-28 AD sampling value compensation coefficient iteration method and system for resistance voltage division sampling technology

Publications (2)

Publication Number Publication Date
CN112187263A true CN112187263A (en) 2021-01-05
CN112187263B CN112187263B (en) 2022-07-01

Family

ID=73923996

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010884496.9A Active CN112187263B (en) 2020-08-28 2020-08-28 AD sampling value compensation coefficient iteration method and system for resistance voltage division sampling technology

Country Status (1)

Country Link
CN (1) CN112187263B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115598579A (en) * 2022-10-11 2023-01-13 辉羲智能科技（上海）有限公司（Cn） Vehicle-mounted domain control voltage sampling system and error compensation method and system thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102435847A (en) * 2011-10-30 2012-05-02 云南省计量测试技术研究院 High-precision electrical parameter analyzer
CN103051339A (en) * 2012-04-27 2013-04-17 深圳市正弦电气股份有限公司 Correcting method and system of AD (Analogue to Digital) sampling value
CN104977096A (en) * 2014-04-04 2015-10-14 株式会社电装 Temperature characteristic correcting device of thermistor and temperature characteristic correcting method of thermistor
CN109164404A (en) * 2018-08-10 2019-01-08 烽火通信科技股份有限公司 The system and method that sample circuit in circuit board is calibrated automatically

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102435847A (en) * 2011-10-30 2012-05-02 云南省计量测试技术研究院 High-precision electrical parameter analyzer
CN103051339A (en) * 2012-04-27 2013-04-17 深圳市正弦电气股份有限公司 Correcting method and system of AD (Analogue to Digital) sampling value
CN104977096A (en) * 2014-04-04 2015-10-14 株式会社电装 Temperature characteristic correcting device of thermistor and temperature characteristic correcting method of thermistor
CN109164404A (en) * 2018-08-10 2019-01-08 烽火通信科技股份有限公司 The system and method that sample circuit in circuit board is calibrated automatically

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115598579A (en) * 2022-10-11 2023-01-13 辉羲智能科技（上海）有限公司（Cn） Vehicle-mounted domain control voltage sampling system and error compensation method and system thereof

Also Published As

Publication number Publication date
CN112187263B (en) 2022-07-01

Similar Documents

Publication Publication Date Title
CN108089141B (en) Error correction method and device of current measuring device based on current divider
US4354177A (en) Method and apparatus for calibrating an analog-to-digital converter for a digital-to-analog converter test system
US8954294B2 (en) Measuring device and measuring method for continuous physical quantity
CN108196215B (en) Method and device for testing delay time of direct-current electronic transformer
CN112187263B (en) AD sampling value compensation coefficient iteration method and system for resistance voltage division sampling technology
CN111256802A (en) Calibration method of weighing device and weighing device
CN111149175B (en) Nuclear instrument isolation output signal scaling method and system adopting same
CN114578121A (en) High-voltage measuring method, system and device
CN117148252A (en) Switch measurement unit and multi-CT interconnection precision self-calibration method
CN107560747A (en) A kind of temperature checking method and its device, integrated circuit
US20190383651A1 (en) Methods, Apparatuses and Systems for Data Conversion
CN105158541A (en) Electronic equipment system current measurement method and device
RU2372592C2 (en) Temperature measuring device which is standard resistor equivalent and method realised in said device
CN107870298B (en) Circuit parameter detection circuit and method of voltage dividing circuit and electric energy meter
CN115173860A (en) Method and system for realizing adaptive compensation of ADC temperature-varying sampling deviation
CN107192742A (en) A kind of metal-oxide gas transducer temperature drift compensation device and method
CN114062752A (en) Mutual inductor processing method and consistency implementation method of mutual inductor and metering core
CN109407042B (en) Intelligent electric meter calibration method
CN113030821A (en) Electric quantity calibration method and device
CN115932711B (en) Data processing method, device and medium for metering reliability of electric energy meter
CN112630721B (en) Error online self-correction method and electric energy meter thereof
EP4261560A1 (en) Circuit calibration systems
JPH0271190A (en) Method for time calibration of computer system
CN112630721A (en) Error online self-correction method and electric energy meter thereof
CN116576904A (en) Sensor testing method and device, electronic equipment and computer readable storage medium

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant