CN115144806A - Calibration method, device, equipment and system for calibration source - Google Patents
Calibration method, device, equipment and system for calibration source Download PDFInfo
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- CN115144806A CN115144806A CN202211081882.XA CN202211081882A CN115144806A CN 115144806 A CN115144806 A CN 115144806A CN 202211081882 A CN202211081882 A CN 202211081882A CN 115144806 A CN115144806 A CN 115144806A
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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
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- G—PHYSICS
- 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
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
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Abstract
The application relates to a calibration method, a calibration device, calibration equipment and a calibration system of a calibration source, wherein the method comprises the following steps: the method comprises the steps of obtaining corresponding parameters of a measuring point based on a target function selected from candidate functions of a measured calibration source, generating a calibration instruction according to the parameters of the measuring point, sending the calibration instruction to the measured calibration source, controlling a signal waveform to be calibrated output by the measured calibration source, measuring the signal waveform to be calibrated through a standard table to obtain indication data, and finally completing calibration of the measuring point of the target function of the measured calibration source based on the indication data and the parameters of the measuring point.
Description
Technical Field
The present application relates to the field of measurement calibration technologies, and in particular, to a calibration method, apparatus, device, and system for a calibration source.
Background
With the development of the metering and calibrating technology of the instruments, the requirements on the calibrating equipment for calibrating and calibrating the instruments are higher and higher. Furthermore, in order to improve the efficiency of calibrating instruments and meters, a multifunctional calibration source is designed, and metering calibration, calibration and test of various industrial measuring instruments and meters such as an analog indicating instrument, a digital multimeter, a pincer ammeter, a power meter and a power analyzer are realized through one calibration device. The multifunctional calibration source can be used for calibrating the functions of the instrument and meter, such as alternating current and direct current voltage, alternating current and direct current power, resistance, capacitance, temperature and the like, has excellent index performance and high precision, and becomes necessary calibration equipment for each measurement institute.
Before the calibration source equipment leaves a factory, each measuring range point with the function needs to be calibrated and adjusted until the qualified performance index is reached. However, during calibration, each measuring range point needs to be calibrated under a corresponding function, and calibration of each measuring range point corresponds to a plurality of calibration steps.
Disclosure of Invention
Therefore, it is necessary to provide a calibration method, device, apparatus and system for calibration source, aiming at the problem that the calibration efficiency is very low due to the fact that calibration before factory is performed on calibration source equipment manually at present.
A calibration method of a calibration source, comprising:
acquiring parameters of corresponding measuring points based on a target function selected from candidate functions of a measured calibration source;
generating a calibration instruction according to the parameters of the measuring points, and sending the calibration instruction to the measured calibration source; the calibration instruction is used for controlling a signal waveform to be calibrated output by the measured calibration source, and measuring the signal waveform to be calibrated through a standard meter to obtain indication data;
and finishing the calibration of the measuring point of the target function of the measured calibration source based on the indicating data and the parameters of the measuring point.
In one embodiment, the target function comprises more than two measurement points; after the calibration of the target function of the calibration source to be measured is completed based on the parameters of the indication data and the measurement point, the calibration method further includes:
and returning to the step of acquiring the parameters of the corresponding measuring points based on the target function selected from the candidate functions of the measured calibration source until the calibration of all the measuring points of the target function is completed.
In one embodiment, before the obtaining the parameters of the corresponding measurement point based on the target function selected from the candidate functions of the calibration source to be measured, the calibration method further includes:
and selecting a target function from the candidate functions of the measured calibration source.
In one embodiment, after the calibration of the measurement point of the target function of the calibration source under test is completed based on the indication data and the parameter of the measurement point, the calibration method further includes:
after finishing the calibration of the measuring points of the target function, returning to the step of selecting the target function from the candidate functions of the measured calibration source until finishing the calibration of the measuring points of all the candidate functions.
In one embodiment, after the obtaining of the parameters of the corresponding measurement points, the calibration method further includes:
generating a setting instruction according to the parameters of the measuring points, and sending the setting instruction to a standard table; the setting instruction is used for controlling the standard meter to measure the waveform of the signal to be calibrated and returning indication data.
In one embodiment, the performing of the calibration of the measurement point of the target function of the calibration source under test based on the indication data and the parameter of the measurement point includes:
error data are obtained according to parameter analysis of the indication data and the measuring points;
if the standard condition is not met according to the error data, the error data is sent to the measured calibration source; the error data is used for correcting the waveform of the signal to be calibrated output by the tested calibration source;
and acquiring indication data obtained by measuring the corrected signal waveform to be calibrated by the standard table, returning to the step of obtaining error data according to parameter analysis of the indication data and the measurement point until the standard condition is met according to the error data, and completing calibration of the measurement point of the target function of the measured calibration source.
In one embodiment, the obtaining of error data according to parameter analysis of the indication data and the measurement point includes:
obtaining initial error data according to the indicating data and the parameters of the measuring points;
compensating the initial error data according to the difference value between the compensation data and the parameter of the measuring point to obtain error data; and the compensation data is obtained by measuring the standard compensation signal waveform output by the standard source according to the calibration instruction by the standard table.
In one embodiment, a calibration apparatus for a calibration source is provided, including:
the acquisition module is used for acquiring parameters of corresponding measuring points based on a target function selected from candidate functions of the measured calibration source;
the sending module is used for generating a calibration instruction according to the parameters of the measuring points and sending the calibration instruction to the measured calibration source; the calibration instruction is used for controlling the waveform of a signal to be calibrated output by the calibration source to be measured, and measuring the waveform of the signal to be calibrated through a standard meter to obtain indication data;
and the calibration module is used for completing the calibration of the measuring point of the target function of the measured calibration source based on the indication data and the parameters of the measuring point.
In one embodiment, a calibration apparatus for calibrating a source is provided, which includes a memory and a processor, the memory storing a computer program, and the processor implementing the steps of the method when executing the computer program.
In one embodiment, a calibration system of a calibration source is provided, which includes a standard table and a controller, wherein the controller connects the standard table with a calibration source to be tested, and the standard table connects with the calibration source to be tested; the controller carries out calibration of the calibration source according to the calibration method of any one of the above.
According to the calibration source calibration method, device, equipment and system, the parameters of the corresponding measuring points are obtained based on the target function selected from the candidate functions of the measured calibration source, the calibration instruction is generated according to the parameters of the measuring points and is sent to the measured calibration source, the waveform of the signal to be calibrated output by the measured calibration source is controlled, the waveform of the signal to be calibrated is measured through the standard table to obtain the indicating data, finally, the calibration of the measuring points of the target function of the measured calibration source is completed based on the indicating data and the parameters of the measuring points, the calibration before the factory of the calibration source equipment can be automatically completed only by configuring the parameters of the measuring points by technicians, and the calibration efficiency is greatly improved.
Drawings
FIG. 1 is a flow diagram of a method for calibration of a calibration source in one embodiment;
FIG. 2 is a flow chart of the calibration steps performed on the measurement points in one embodiment;
FIG. 3 is a flow chart of the compensation step for error data in one embodiment;
FIG. 4 is a flow chart of a calibration method for a calibration source in another embodiment;
FIG. 5 is a flow diagram of editing a calibration template in one embodiment;
FIG. 6 is a flow diagram of configuring a communication address in one embodiment;
FIG. 7 is a flowchart of editing a calibration template in another embodiment;
FIG. 8 is a flow chart of a calibration method for a calibration source in another embodiment;
FIG. 9 is a flow diagram of a calibration arrangement for calibrating a source in one embodiment;
FIG. 10 is a system diagram of a calibration apparatus for calibrating a source in one embodiment;
FIG. 11 is a functional block diagram of a calibration system for a calibration source in one embodiment;
FIG. 12 is a schematic interface diagram of a calibration system for a calibration source in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
As described in the background, with the development of the technology for calibrating the measurement of the instrument, the requirement for a calibration device for calibrating and calibrating the instrument is higher. Furthermore, in order to improve the efficiency of calibrating instruments and meters, a multifunctional calibration source is designed, and metering calibration, calibration and test of various industrial measuring instruments and meters such as an analog indicating instrument, a digital multimeter, a pincer ammeter, a power meter and a power analyzer are realized through one calibration device. The multifunctional calibration source can be used for calibrating the functions of the instrument and meter, such as alternating current and direct current voltage, alternating current and direct current power, resistance, capacitance, temperature and the like, has excellent index performance and high precision, and becomes necessary calibration equipment for each measurement institute. Before the calibration source equipment leaves the factory, calibration and adjustment must be carried out on each measuring range point with the function until the qualified performance index is reached. However, during calibration, each measuring range point needs to be calibrated under a corresponding function, and calibration of each measuring range point corresponds to a plurality of calibration steps. For example, an existing equipment factory manually calibrates a calibration source device with a model number of SB7520, and needs 2 to 3 days to calibrate and complete a calibration source device without error and without success. If the measuring point with the over-tolerance range which is too large and needs to be readjusted is found in the calibration process, longer time is needed.
Based on the calibration method, after technicians configure the parameters of the measurement points corresponding to the functions of the calibration source, the calibration before delivery of the calibration source is completed through the standard table by adopting an automatic instruction sending mode based on the configured parameters of the measurement points, and the calibration efficiency is greatly improved.
In one embodiment, as shown in FIG. 1, the method includes the following steps 102 through 106.
Step 102: and acquiring parameters of corresponding measuring points based on a target function selected from the candidate functions of the measured calibration source.
The candidate functions may include all functions of the calibration source to be tested, or may be functions to be tested selected by a technician from all functions based on the current calibration event. The type of function involved is not unique and can be determined according to the model of the calibration source to be tested. For example, when the measured calibration source is the SB7520 multifunctional calibration source, and eight function types of the precision multimeter, such as ac/dc voltage, ac/dc current, ac/dc power, resistance, capacitance, and temperature, can be calibrated, the corresponding candidate function may include at least one of the eight function types.
Specifically, the target function represents a function currently being calibrated, and is selected from candidate functions of a calibration source to be measured. The selection mode is not fixed, and can be determined according to the model of the calibration source to be measured and the application mode with the function, and the selection mode can be input to a controller of the calibration system after being selected by a technician, or the controller can sequentially select a target function from candidate functions.
Further, after the target function is selected, parameters of the measuring points corresponding to the target function can be obtained, so that the measured calibration source and the standard table can be calibrated automatically. The measuring points represent the types of signal waveforms which can be output by the measured calibration source under the target function, and the number of the measuring points is not unique, only one measuring point can be provided, and two or more measuring points can be provided. For example, when the calibration source to be measured is an SB7520 multifunctional calibration source, the function of voltage calibration may include 14 measurement points of + -3.3 mV, + -33 mV, + -330 mV, + -3.3V, + -33V, + -330V and + -1000V. The parameters of the measurement points may include standard parameters, such as amplitude, frequency, etc., required by the calibration source under test to output a corresponding type of signal waveform.
Step 104: generating a calibration instruction according to the parameters of the measuring points, and sending the calibration instruction to a measured calibration source; the calibration instruction is used for controlling the waveform of the signal to be calibrated output by the calibration source to be tested, and measuring the waveform of the signal to be calibrated through the standard meter to obtain the indication data.
The calibration instruction is a carrier for the controller to transmit the parameters of the measuring points to the measured calibration source, and the calibration instruction can be determined based on a communication protocol specifically used between the controller and the measured calibration source, or can be completed by adopting a uniformly packaged driving platform. For example, TCP/IP (Transmission Control Protocol/Internet Protocol ) Protocol communication may be used between the controller and the calibration source to be measured, then the communication address of the calibration source to be measured is configured to the controller correspondingly, a VISA (visual instrumentation software Architecture) driving platform is used to encapsulate the standard parameters required to be sent to the calibration source to be measured into a function of a uniform style as a calibration instruction, and then the calibration instruction is sent to the calibration source to be measured through the configured address. The style of the function is not limited, and the function can be set according to parameters which need to be sent actually.
Specifically, after the calibration instruction is received by the calibration source to be measured, the signal waveform to be calibrated corresponding to the standard parameter can be output based on the calibration instruction. It can be understood that the calibration source to be measured is calibrated, that is, whether the waveform of the output signal to be calibrated is matched with the standard parameter is detected. Correspondingly, whether the signals are matched or not can be determined through indicating data obtained by measuring the waveforms of the signals to be calibrated through a standard table.
The standard meter is used for measuring the waveform of the signal to be calibrated, and the standard meter can be controlled to measure by sending a reading instruction by the controller, or the standard meter can measure the signal in real time after being connected with a measured calibration source and automatically feed back the signal to the controller. In this embodiment, in order to ensure accurate and timely calibration, after the calibration instruction is sent to the calibration source to be measured, a reading instruction is also sent to the standard meter, so that the standard meter measures the waveform of the signal to be calibrated to obtain the indication data. In accordance with the calibration command, the read command may also be obtained by driving the platform using VISA. The standard meter and the controller can be used GPIB communication interface to realize the bidirectional communication of the instruction and the data, and the connection mode between the standard meter and the measured calibration source to realize the measurement of the signal waveform to be calibrated can be determined according to the connection mode between the actual instruments.
Step 106: and finishing the calibration of the measuring points of the target function of the measured calibration source based on the indicating data and the parameters of the measuring points.
In particular, the measured indicating data should be in the form corresponding to the standard parameters, for example, both amplitude values. Then judging whether the out-of-tolerance exists or not based on the indicating data and the standard parameters, if not, representing that a signal to be calibrated output by the measured calibration source meets the standard without calibration; if the out-of-tolerance exists, the signal to be calibrated output by the characterization measured calibration source does not accord with the standard, and calibration is needed.
Further, the error data can be sent to a measured calibration source, so that the measured calibration source corrects the output signal to be calibrated according to the error data, obtains the indicating data by measuring through the standard table again after correction, and judges whether the corrected signal to be calibrated meets the standard or not. And circulating the steps until the signal to be calibrated after the correction according to the error data accords with the standard, and completing the calibration of the measuring point of the target function of the measured calibration source.
According to the calibration source calibration method, the corresponding parameters of the measurement points are obtained based on the target function selected from the candidate functions of the measured calibration source, the calibration instruction is generated according to the parameters of the measurement points and is sent to the measured calibration source, the waveform of the signal to be calibrated output by the measured calibration source is controlled, the waveform of the signal to be calibrated is measured through the standard table to obtain the indication data, finally, the calibration of the measurement points of the target function of the measured calibration source is completed based on the indication data and the parameters of the measurement points, the calibration before factory of the calibration source equipment can be automatically completed only by configuring and completing the parameters of the measurement points by technicians, and the calibration efficiency is greatly improved.
It can be understood that the specific manner of the parameters of the measurement points corresponding to the target function acquired in step 102 is not unique, and when the target function includes more than two measurement points, the parameters of all the measurement points corresponding to the target function may be directly acquired, so that the parameters are called by the measurement points in subsequent steps 104 and 106. Alternatively, the parameters of one measurement of the target function may be obtained first, and then the next measurement point may be obtained after steps 104 and 106 are completed. For example, in one embodiment, after completing calibration of the measurement point of the target function of the calibration source under test based on the parameter indicating data and the measurement point in step 106, the method further comprises: and returning to the step of acquiring the parameters of the corresponding measuring points based on the target function selected from the candidate functions of the measured calibration source until the calibration of all the measuring points of the target function is completed. After completing the calibration of the current measurement point of the target function of the measured calibration source based on the indication data and the parameters of the measurement point, the method returns to step S102, and reselects the next measurement point of the target function for calibration, thereby realizing the automatic calibration of all the measurement points of the target function. In addition, after the calibration of all the measurement points of the current target function is completed, the calibration result of the current target function can be displayed so as to be conveniently viewed by a metering personnel.
In one embodiment, before the step 102 of obtaining the parameters of the corresponding measuring points based on the target function selected from the candidate functions of the measured calibration source, the method further comprises: and selecting a target function from the candidate functions of the measured calibration source. Specifically, candidate functions to be calibrated are stored in the controller in advance, and after calibration is started, the controller selects a target function from the candidate functions to calibrate.
Further, in an embodiment, after the calibration of the measurement point of the target function of the calibration source under test is completed based on the parameter indicating the data and the measurement point in step 106, the method further includes: after finishing the calibration of the measuring points of the target function, returning to the step of selecting the target function from the candidate functions of the measured calibration source until finishing the calibration of the measuring points of all the candidate functions. Specifically, after calibrating all the measurement points of the current target function, the next target function is selected again from the candidate functions of the measured calibration source, and calibration of all the measurement points of the next target function is performed.
It can be understood that the manner of selecting a target function from the candidate functions and selecting one measurement point from all measurement points of the target function is not unique, if the functions of the calibration source to be measured can be prepared for communication with the standard table in advance, the connection manner does not need to be changed midway, the candidate functions and all measurement points can be stored into a list, and the selection is performed in sequence until the calibration of all the candidate functions and all the measurement points is completed, or one is selected from a set of the candidate functions and all the measurement points, and then one is selected from the set of the remaining candidate functions and the measurement points at will in the next selection, and so on until the calibration of all the candidate functions and all the measurement points is completed. In addition, the next target function can be selected from the candidate functions according to the two modes after sequentially selecting all the measuring points until completing the calibration of the current target function and receiving the instruction for representing the starting of the next target function calibration, and then all the measuring points of the next target function can be calibrated again.
It should be noted that, if the connection mode between the standard table and the calibration source needs to be adjusted between the calibration of different functions, the calibration may also be performed after completing the calibration of all the measurement points of the current target function and waiting for the meter to adjust the connection mode, and then inputting an instruction to select the next target function for calibration. For example, after the measurement personnel determines that the calibration of the current target function is completed according to the displayed calibration result, the connection between the standard table and the calibration source is adjusted, the instruction is input again to select the next target function, and the controller performs the calibration of the measurement point again according to the selected target function.
The parameters of the measuring points can also comprise a range parameter corresponding to the standard parameter, and the range parameter can be used for guiding the standard table to be switched to a range matched with the range parameter to measure the waveform of the signal to be calibrated so as to ensure that the measured indicating data is more accurate. In one embodiment, after acquiring the parameters of the corresponding measurement points in step 102, the method further includes: generating a setting instruction according to the parameters of the measuring points, and sending the setting instruction to a standard table; and setting instructions for controlling the standard meter to measure the waveform of the signal to be calibrated and returning indication data.
Specifically, the setting instruction is generated according to the range parameter, and is used for controlling the standard table to measure the waveform of the signal to be calibrated according to the range parameter, and returning corresponding indicating data. Consistent with the calibration instructions, the setting instructions may also be obtained by using a VISA-driven platform. The setting instruction may be issued before the calibration instruction is sent, or may be issued after the calibration instruction is sent. If the calibration instruction is sent before being sent, the setting instruction is only used for realizing the range setting of the standard meter, and the measurement of the waveform of the signal to be calibrated and the return of the indicating data need to be carried out after the reading instruction arrives. If the calibration instruction is sent after being sent, the setting instruction can be the same as the reading instruction, and after the standard meter receives the setting instruction, the standard meter measures the waveform of the signal to be calibrated according to the range parameter and returns corresponding indication data.
In another embodiment, because the measured calibration source has a certain degree of oscillation when generating the waveform signal to be calibrated, the generated setting instruction or reading instruction is sent to the standard table after a preset time length, so as to ensure that the waveform signal to be calibrated obtained by the measurement of the indicating data is stable, and achieve the purpose of improving the calibration accuracy. The preset time length represents the time length when the waveform signal to be calibrated reaches stability, the value is not fixed or unique, and the preset time length can be set correspondingly according to different waveform signals to be calibrated output by the measured calibration source, namely the preset time lengths corresponding to different functional types are different, and the preset time lengths corresponding to different measuring points can also be different.
In one embodiment, as shown in fig. 2, the step 106 of calibrating the measurement point of the target function of the calibration source under test based on the indication data and the parameter of the measurement point includes the following steps 202 to 206.
Step 202: and obtaining error data according to parameter analysis of the indication data and the measuring points. Specifically, the parameter of the measurement point is a standard parameter, and the two forms are corresponding and consistent, for example, both are amplitude values. And then, calculating the difference between the indicating data and the standard parameters to obtain error data.
Step 204: if the standard conditions are not met according to the error data, the error data are sent to a measured calibration source; and the error data is used for correcting the waveform of the output signal to be calibrated by the calibration source to be tested.
Specifically, if the error data is smaller than the preset allowable error range, it is determined that there is no out-of-tolerance, which indicates that the standard condition is satisfied, the measurement point does not need to be calibrated, and the step of obtaining the parameters of the corresponding measurement point based on the target function selected from the candidate functions of the measured calibration source is returned until the calibration of all the measurement points of the target function is completed. If the error data is larger than or equal to the preset allowable error range, judging that the error exists, indicating that the standard condition is not met, needing calibration, and sending the error data to a measured calibration source for calibration. The preset allowable error range can be set according to different target functions and measuring points, so that the calibration source has certain fault tolerance and simultaneously ensures that the waveform of the output signal to be calibrated conforms to the calibration standard.
It is understood that the manner of correcting the output signal waveform to be calibrated by the calibration source to be measured based on the error data is not limited, and may be implemented according to a manner commonly used by those skilled in the art, and is not elaborated in the embodiments of the present application.
Step 206: and acquiring indication data obtained by measuring the corrected signal waveform to be calibrated by the standard table, returning to the step of obtaining error data according to parameter analysis of the indication data and the measurement point until the standard condition is met according to the error data, and completing the calibration of the measurement point of the target function of the measured calibration source.
Specifically, after the measured calibration source completes the correction of the waveform of the signal to be calibrated, the indication data obtained by measuring the waveform of the corrected signal to be calibrated through the standard table needs to be re-used to determine whether the corrected signal to be calibrated meets the standard condition. It can be understood that if the error data is not satisfied, the error data needs to be sent to the measured calibration source again for correction, and the process is circulated until the error data obtained according to the corrected signal to be calibrated satisfies the standard condition, and the calibration of the measurement point of the target function of the measured calibration source is completed.
It will be appreciated that where a large discrepancy is determined to exist from the indicating data and the standard parameters, it is necessary to exclude whether it is due to an error in the standard table measurements. In addition, when the frequency in the standard parameter is high, the error data may be inaccurate due to the frequency response. Under the above circumstances, the calibration of the calibration source to be measured needs to be completed by adding a standard source to compensate the error data.
In one embodiment, as shown in fig. 3, the step 202 of obtaining error data according to parameter analysis of the indication data and the measurement points includes the following steps 302 to 304.
Step 302: and obtaining initial error data according to the parameters of the indicating data and the measuring points. It will be appreciated that the initial error data represents the error data prior to compensation.
Step 304: compensating the initial error data according to the difference value of the compensation data and the parameters of the measuring points to obtain error data; and the compensation data is obtained by measuring the standard compensation signal waveform output by the standard source according to the calibration instruction by the standard table.
Specifically, the standard source is consistent with the measured calibration source and is also a device for outputting signal waveforms according to standard parameters, but the precision of the standard source is higher than that of the measured calibration source, for example, if the precision of the measured calibration source is six-bit and half, the precision of the standard source can reach eight-bit and half. The controller also sends a calibration command generated according to the standard parameter to the standard source so that the standard source outputs a standard compensation signal waveform. The standard table then measures the standard compensation signal to obtain compensation data, which is understood to be in a form consistent with both the indicating data and the standard parameter, e.g., both amplitude values. And further, compensating the initial error data according to the difference value of the compensation data and the standard parameter to obtain error data for subsequently judging whether the waveform of the signal to be calibrated meets the standard condition.
In one embodiment, the implementation steps of the calibration method for the calibration source are explained by taking the flowchart shown in fig. 4 as an example.
Step 1: completing the wiring connection of communication interfaces adopted among the measured calibration source, the standard meter, the standard source and the controller;
step 2: finishing the interface setting of the measured calibration source, the standard table and the standard source based on the corresponding communication interface and protocol, and configuring the corresponding equipment address on the controller;
and 3, step 3: sending a connection instruction, and judging whether to connect corresponding equipment according to an indication signal on the controller;
and 4, step 4: a technician performs parameter configuration and loading on a preset calibration template; the process of parameter configuration and loading is shown in fig. 5.
And 5: setting corresponding delay parameters;
and 6: starting calibration;
and 7: selecting a target function from the functions loaded with the calibration template;
and 8: judging whether connection is good according to a connection mode corresponding to the selected target function; if yes, entering step 9, and if not, connecting a test line;
and step 9: selecting a range to be calibrated from the selected range of the target function;
step 10: testing corresponding calibration measurements;
step 11: sending a setting instruction (a calibration instruction) to a measured calibration source;
step 12: after waiting for the correspondingly set delay parameter, entering step 13;
step 13: sending a reading instruction to the standard table, and reading to obtain indicating data;
step 14: analyzing whether the corresponding calibrated range meets the standard or not based on the indicating data, and storing the data; if not, the measured calibration source is corrected and then the step 10 is returned to recalibrate; if the criteria are met, the process returns to step 9 to select the next range point.
It is understood that, between steps 7 and 8 and between steps 9 and 10, a node corresponding to whether calibration is finished or not is also set, that is, when the target function and the range point of the target function are selected, the calibration process can be selected to be finished at any time.
The calibration process is explained by taking the measured calibration source as an SB7520 multifunctional calibration source, a Fluke8508A high-precision multimeter as a standard meter and a Fluke5720A multifunctional calibrator as a standard source.
As shown in fig. 6, the communication address of the device is configured based on the corresponding connection interface, the controller communicates with the standard table and the standard source through the GPIB hardware interface, and the controller communicates with the calibration source to be tested through the TCP/IP hardware interface. Correspondingly, the address configuration of the Fluke8508A high-precision multimeter is GPIB0::1:: INSTR; the address configuration of the SB7520 multifunctional calibration source is GPIB0: 1: INSTR; the address of the Fluke5720A multifunctional calibrator is configured as: TCPIP 192.168.1.210, 5025, SOCKET.
As shown in fig. 7, the meter staff then edits the test methods corresponding to the measurement points of the functions (configures parameters of the measurement points) based on the existing calibration template, for example, the functions include eight items, which are DCV1 voltage, DCV2 voltage, DC _ CUR current, AC _ VOL1 AC voltage, AC _ VOL2 AC voltage, AC _ CUR AC current, 2-wire resistance, and 4-wire resistance. After the test method is edited, the style of the communication instruction for transmitting the parameters of the measuring points can be edited for packaging into a uniform function form. For example, the transmitted command may be a sendvisa protocol command, and the command for reading data may be a readvisa protocol command.
Fig. 8 shows a calibration process for the SB7520 calibration source, which includes the following steps:
step 11: connecting the instrument with a controller and a measured calibration source according to the corresponding connection mode;
step 12: selecting a corresponding target function and a measuring point;
step 13: sending a setting instruction to a Fluke8508 standard table, correspondingly setting the measuring range of the Fluke8508 standard table, sending a calibration instruction to an SB7520 calibration source, and enabling the calibration source to output a corresponding signal waveform to be calibrated;
step 14: sending a reading instruction to a Fluke8508 standard table, and enabling the reading instruction to write back the indicating data;
step 15: calculating an error value from the indicating data;
step 16: and sending the error value to an SB7520 calibration source for adjustment to complete calibration.
In this embodiment, the metering personnel only need to configure the parameters of the corresponding measurement points according to the template, and the software personnel only need to develop and complete the corresponding template, so that the requirement on the professional knowledge of the software developer is not high. The automatic detection method is formed by automatically sending instructions in a computer program, so that the calibration can be performed quickly, the efficiency is improved, meanwhile, the interference of human factors is eliminated, the human error rate is reduced, the detection precision is improved, and the automation of the calibration detection is realized.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the embodiment of the present application further provides a calibration apparatus for implementing the calibration method of the calibration source. The solution of the problem provided by the device is similar to the solution described in the above method, so the specific limitations in one or more embodiments of the calibration device provided below can be referred to the limitations of the calibration method in the above, and are not described herein again.
In one embodiment, as shown in fig. 9, a calibration apparatus of a calibration source is provided, which includes an obtaining module 910, a sending module 920, and a calibrating module 930, where:
an obtaining module 910, configured to obtain a parameter of a corresponding measurement point based on a target function selected from candidate functions of a measured calibration source;
a sending module 920, configured to generate a calibration instruction according to the parameter of the measurement point, and send the calibration instruction to the calibration source to be measured; the calibration instruction is used for controlling the waveform of a signal to be calibrated output by the calibration source to be tested, and measuring the waveform of the signal to be calibrated through a standard meter to obtain indication data;
and a calibration module 930 configured to complete calibration of the measurement point of the target function of the calibration source to be measured based on the indication data and the parameter of the measurement point.
In one embodiment, the target function includes more than two measurement points; after the calibration module 930 completes calibration of the target function of the calibration source to be tested based on the indication data and the parameters of the measurement points, the obtaining module 910 is further invoked to obtain parameters of the next measurement point based on the target function selected from the candidate functions of the calibration source to be tested until calibration of all measurement points of the target function is completed.
In one embodiment, the apparatus further comprises a selection module for selecting a target function from the candidate functions of the calibration source under test.
In one embodiment, after the calibration module 910 completes calibrating the measurement points of the target function of the calibration source under test based on the parameters of the indication data and the measurement points, the selection module is further invoked to select the target function from the candidate functions of the calibration source under test again until completing calibrating the measurement points of all the candidate functions.
In one embodiment, the sending module 920 is further configured to generate a setting instruction according to the parameter of the measurement point, and send the setting instruction to the standard table; and setting instructions for controlling the standard meter to measure the waveform of the signal to be calibrated and returning indication data.
In one embodiment, the calibration module 930 is further configured to obtain error data according to parameter analysis of the indication data and the measurement points; if the standard conditions are not met according to the error data, the error data are sent to a measured calibration source; the error data is used for correcting the waveform of the output signal to be calibrated by the calibrated source to be tested; and acquiring indication data obtained by measuring the corrected signal waveform to be calibrated by the standard table, and analyzing according to the indication data and parameters of the measuring points to obtain error data until the standard condition is met according to the error data, thereby completing the calibration of the measuring points of the target function of the measured calibration source.
In one embodiment, the calibration module 930 is further configured to obtain initial error data according to the parameter of the measurement point and the indication data; compensating the initial error data according to the difference value of the compensation data and the parameters of the measuring points to obtain error data; and the compensation data is obtained by measuring the standard compensation signal waveform output by the standard source according to the calibration instruction by the standard table.
All or part of each module in the calibration device of the calibration source can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a calibration apparatus for calibrating a source is provided, and the calibration apparatus may be a terminal, and the internal structure thereof may be as shown in fig. 10. The calibration equipment comprises a processor, a memory, a communication interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the calibration apparatus is configured to provide computational and control capabilities. The memory of the calibration device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the calibration device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a calibration method for a calibration source. The display screen of the calibration device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the calibration device can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the calibration device, an external keyboard, a touch pad or a mouse, and the like.
It will be understood by those skilled in the art that the structure shown in fig. 10 is a block diagram of only a part of the structure related to the solution of the present application, and does not constitute a limitation to the calibration apparatus to which the solution of the present application is applied, and a specific calibration apparatus may include more or less components than those shown in the figure, or combine some components, or have a different arrangement of components.
In one embodiment, a calibration apparatus for calibrating a source is provided, comprising a memory and a processor, the memory storing a computer program, the processor implementing the steps of the method described above when executing the computer program.
In one embodiment, a calibration system of a calibration source is provided, which includes a standard meter and a controller, wherein the controller connects the standard meter and a calibration source to be measured, and the standard meter connects the calibration source to be measured; the controller performs calibration source calibration according to the calibration method described in any of the above embodiments.
Specifically, the controller is used for instruction issue, data analysis and calibration in the whole calibration process, and the functional modules are as shown in fig. 11. The standard meter is used for measuring the waveform of a signal to be calibrated output by the calibrated equipment. Fig. 12 is a diagram illustrating a software usage interface correspondingly developed by the calibration system of the calibration source in an embodiment.
In one embodiment, the calibration system further comprises a calibration source connecting the controller with the calibration table for compensating error data for calibration under certain conditions to ensure higher calibration accuracy.
The implementation scheme for solving the problem provided by the calibration system is similar to the implementation scheme described in the above method, so the specific limitations in one or more of the above embodiments of the calibration system can be referred to the limitations on the calibration method in the above description, and details are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, databases, or other media used in the embodiments provided herein can include at least one of non-volatile and volatile memory. The nonvolatile Memory may include a Read-Only Memory (ROM), a magnetic tape, a floppy disk, a flash Memory, an optical Memory, a high-density embedded nonvolatile Memory, a resistive Random Access Memory (ReRAM), a Magnetic Random Access Memory (MRAM), a Ferroelectric Random Access Memory (FRAM), a Phase Change Memory (PCM), a graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), for example. The databases involved in the embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (10)
1. A method for calibrating a calibration source, comprising:
acquiring parameters of corresponding measuring points based on a target function selected from candidate functions of a measured calibration source;
generating a calibration instruction according to the parameters of the measuring points, and sending the calibration instruction to the measured calibration source; the calibration instruction is used for controlling a signal waveform to be calibrated output by the measured calibration source, and measuring the signal waveform to be calibrated through a standard meter to obtain indication data;
and finishing the calibration of the measuring point of the target function of the measured calibration source based on the indicating data and the parameters of the measuring point.
2. The calibration method according to claim 1, wherein the target function comprises more than two measuring points; after the calibration of the target function of the measured calibration source is completed based on the indication data and the parameter of the measurement point, the method further comprises the following steps:
and returning to the step of acquiring the parameters of the corresponding measuring points based on the target function selected from the candidate functions of the measured calibration source until the calibration of all the measuring points of the target function is completed.
3. The calibration method according to claim 1, wherein before the obtaining parameters of the corresponding measurement point based on the target function selected from the candidate functions of the calibration source to be measured, the method further comprises:
and selecting a target function from the candidate functions of the measured calibration source.
4. The calibration method according to claim 3, further comprising, after completing calibration of the measurement point of the target function of the calibration source under test based on the indication data and the parameter of the measurement point:
after finishing calibrating the measuring points of the target function, returning to the step of selecting the target function from the candidate functions of the measured calibration source until completing calibrating the measuring points of all the candidate functions.
5. The calibration method according to claim 2, wherein after the obtaining of the parameters of the corresponding measurement points, the method further comprises:
generating a setting instruction according to the parameters of the measuring points, and sending the setting instruction to a standard table; the setting instruction is used for controlling the standard meter to measure the waveform of the signal to be calibrated and returning indication data.
6. The calibration method according to claim 3, wherein the completing calibration of the measurement point for the target function of the calibration source under test based on the indication data and the parameter of the measurement point comprises:
error data are obtained according to parameter analysis of the indicating data and the measuring points;
if the standard condition is not met according to the error data, the error data is sent to the measured calibration source; the error data is used for correcting the waveform of the signal to be calibrated output by the tested calibration source;
and acquiring indication data obtained by measuring the corrected signal waveform to be calibrated by the standard table, returning to the step of obtaining error data according to parameter analysis of the indication data and the measurement point until the standard condition is met according to the error data, and completing the calibration of the measurement point of the target function of the measured calibration source.
7. The calibration method according to claim 6, wherein the obtaining of the error data according to the parameter analysis of the indication data and the measurement point comprises:
obtaining initial error data according to the indicating data and the parameters of the measuring points;
compensating the initial error data according to the difference value between the compensation data and the parameter of the measuring point to obtain error data; and the compensation data is obtained by measuring the standard compensation signal waveform output by the standard source according to the calibration instruction by the standard table.
8. A calibration arrangement for calibrating a source, comprising:
the acquisition module is used for acquiring parameters of corresponding measuring points based on a target function selected from candidate functions of the measured calibration source;
the sending module is used for generating a calibration instruction according to the parameters of the measuring points and sending the calibration instruction to the measured calibration source; the calibration instruction is used for controlling a signal waveform to be calibrated output by the measured calibration source, and measuring the signal waveform to be calibrated through a standard meter to obtain indication data;
and the calibration module is used for completing the calibration of the measuring point of the target function of the measured calibration source based on the indication data and the parameters of the measuring point.
9. Calibration apparatus for a calibration source, comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 7.
10. The calibration system of the calibration source is characterized by comprising a standard table and a controller, wherein the controller is connected with the standard table and a measured calibration source, and the standard table is connected with the measured calibration source; the controller performs calibration source calibration according to the method of any one of claims 1 to 7.
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