Zero phase calibration method, computer device, and storage medium

Abstract

The zero phase calibration method includes selecting a set of identical measurement ranges between different channels of a wide measurement range meter and a set of adjacent measurement ranges consisting of this measurement range and an adjacent smaller measurement range, measuring phase calibration parameters between channel signals of the set of identical measurement ranges and the set of adjacent measurement ranges, storing the measured phase calibration parameters in memory, recalling the measured phase calibration parameters stored in memory to stepwise calculate phase calibration parameters between channel signals of each remaining set of measurement ranges of the wide measurement range meter, storing the calculated phase calibration parameters in memory, and calibrating the phase zero points between different channel signals of the wide measurement range meter by recalling the corresponding phase calibration parameters stored in memory when calibrating the wide measurement range meter.

Description

[Technical Field]

[0001] This invention relates to the field of phase calibration. Specifically, it relates to a zero phase calibration method, a computer device, and a storage medium. [Background technology]

[0002] By incorporating a voltage or current measurement range extender into a wide-range measuring meter such as a vector voltage analyzer, it is possible to realize functions such as multi-channel voltage or current ratio measurement, phase difference measurement, and even power measurement using combined voltage and current channels. Such meters typically require calibration of the channel voltage / current RMS values ​​and inter-channel phase difference errors before use to ensure measurement accuracy. Currently, calibration of channel phase differences in vector voltage analyzers and other multi-channel measuring instruments (e.g., phase meters) generally employs a highly stable, low-noise, high-precision signal source with adjustable amplitude and frequency, and directly calibrates the zero phase point using a voltage divider or shunt. Due to the large number of channels and measurement range levels in wide-range measuring meters, there are many sets of measurement ranges that require calibration. Most current calibration methods employ manual calibration by humans, but this method is inefficient, inaccurate, and has long calibration cycles. Some automatic calibration methods require scanning all sets of measurement ranges, resulting in a very time-consuming calibration process.

[0003] Furthermore, when using a wide-range measuring meter, if there are pairs of large and small measuring ranges with considerably wide spans between different channels, it is necessary to introduce a voltage divider or shunt to obtain a small amplitude signal and input it into the channel of the small measuring range for initial calibration. However, this calibration method is limited by the phase frequency characteristics of the voltage divider or shunt, and high-precision phase measurement and transmission cannot be achieved with this method.

[0004] Therefore, current phase calibration methods cannot meet the requirements for accuracy and efficiency in phase frequency calibration of wide-range measuring meters. [Overview of the Initiative]

[0005] According to various embodiments disclosed in the present invention, a zero-phase calibration method, a computer device, and a storage medium are provided.

[0006] The zero-phase calibration method is a method for calibrating the phase zero point between different channel signals of a wide-range measuring meter. Step S1 involves selecting a set of identical measurement ranges and a set of adjacent measurement ranges consisting of a measurement range and the smaller of the two adjacent measurement ranges between different channels A and B of a wide measurement range meter, and measuring the phase calibration parameters between the channel signals of the set of identical measurement ranges and between the channel signals of the set of adjacent measurement ranges. Step S2 completes the measurement of phase calibration parameters for all sets of the same measurement range and adjacent measurement ranges, and stores the measured phase calibration parameters in memory. Step S3 involves retrieving the measured phase calibration parameters stored in memory and stepwise calculating the phase calibration parameters between the channel signals for each remaining set of measurement ranges of the wide measurement range meter. Step S4 involves storing the phase calibration parameters calculated in step S3 into memory, Calibrating a wide range measuring meter includes step S5, which involves retrieving corresponding phase calibration parameters stored in memory to calibrate the phase zero points between different channel signals of the wide range measuring meter.

[0007] The computer device comprises a memory storing computer-readable instructions and one or more processors, and when one or more processors execute computer-readable instructions, it implements the steps of the zero-phase calibration method provided in any one embodiment of the present invention.

[0008] Computer-readable instructions are stored. notA volatile computer-readable storage medium causes one or more processors to implement a step of the zero-phase calibration method provided in any one embodiment of the present invention when a computer-readable instruction is executed on one or more processors. Details of one or more embodiments of the present invention are shown in the following drawings and description. Other features and advantages of the present invention will become apparent from the description, drawings and claims. [Brief explanation of the drawing]

[0009] To more clearly explain the technical solutions according to embodiments of the present invention, the drawings required in the embodiments will be briefly described below. However, the drawings in the following description represent only a few embodiments of the present invention, and those skilled in the art can obtain other drawings based on these without any creative work. [Figure 1] This is a schematic diagram illustrating the connection of zero-phase calibration between the large measurement range channel and the small measurement range channel of a conventional vector voltage analyzer using a voltage divider. [Figure 2] This is a schematic diagram of the application environment for a zero-phase calibration method according to one or more embodiments. [Figure 3] This is a schematic diagram of the calibration environment for a zero-phase calibration method according to one or more embodiments. [Figure 4] This is a flowchart of a zero-phase calibration method according to one or more embodiments. [Figure 5] This is a matrix diagram of phase calibration parameters between channel signals for each set of measurement ranges when performing calibration using the zero-phase calibration method according to one or more embodiments. [Modes for Carrying Out the Invention] [Modes for carrying out the invention]

[0010] To further clarify the technical solutions and advantages of the present invention, the invention will be described in more detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are for illustrative purposes only and do not limit the invention.

[0011] Referring to Figure 1, Figure 1 is a schematic diagram of the connection of zero-phase calibration between the large measurement range channel and the small measurement range channel of a conventional vector voltage analyzer using a voltage divider. As shown in Figure 1, when measuring with a vector voltage analyzer, different channels CH A CH B There is a set of two measurement ranges: a large 5V range and a small 2mV range. For initial calibration, two full-scale amplitude signals of the large 5V range are output from a high-precision signal source, and one of these signals is connected to the channel CH of the large 5V range of the vector voltage analyzer being calibrated. A The signal is directly input to one channel, and the other signal is introduced into a voltage divider to obtain a small amplitude signal in the 2mV small measurement range, which corresponds to the 2mV small measurement range channel CH of the vector voltage analyzer being calibrated. B This is done by inputting the signal. However, this calibration method is limited by the phase frequency characteristics of the voltage divider, and high-precision phase measurement and transmission cannot be achieved. Furthermore, in vector voltage analyzers with sets of measurement ranges with wide spans between channels, it is necessary to obtain a corresponding small amplitude signal using a voltage divider and input it into the channel with the small measurement range for initial calibration, which makes the calibration process very time-consuming.

[0012] Hereinafter, in order to make the objectives and advantages of the present invention clearer, the technical solutions relating to embodiments of the present invention will be clearly and completely described with reference to the drawings of embodiments of the present invention. Clearly, the embodiments described are some embodiments of the present invention, not all embodiments.

[0013] Referring to Figure 2, Figure 2 is a schematic diagram of an application environment for a zero-phase calibration method provided by one embodiment of the present invention. In the application environment shown in Figure 2, the computer device may be a service, and its internal structure may be as shown in Figure 2. The computer device comprises a processor, memory, interface, and data library connected via a system bus. Here, the processor of the computer device is used to provide computation and control functions. The memory of the computer device includes a non-volatile storage medium, internal memory. The non-volatile storage medium stores an operating system, computer-readable instructions, and a data library. The internal memory provides an environment for the execution of the operating system and computer-readable instructions in the non-volatile storage medium. The data library of the computer device is used to store data for the zero-phase calibration method. The interface of the computer device is used to communicate with an external terminal. When the computer-readable instructions are executed by the processor, the zero-phase calibration method can be realized.

[0014] Referring to Figure 3, Figure 3 is a schematic diagram of the calibration environment for a zero-phase calibration method provided by one embodiment of the present invention. In the calibration environment shown in Figure 3, the computer device 1 automatically calibrates the phase zero points between different channels of the wide measurement range meter 2. The computer device 1 is the same as the computer device shown in Figure 2 above, so its description is omitted here.

[0015] In the embodiment shown in Figure 3, two different channels CH of the wide measuring range meter 2 are used. A and Channel CH BThe calibration of the phase zero point between them is an automatic calibration performed by the computer device 1 executing the zero phase calibration method claimed in the present invention to control the standard source 3. The wide measurement range meter 2 is a meter with a wide measurement range and having a plurality of signal channels, including, but not limited to, a vector voltage analyzer, a phase meter, a three-phase standard electric energy meter, etc. Such a meter has two or more signal channels, and each channel has a plurality of levels of measurement ranges, and the measurement range amplitudes of the corresponding levels of measurement ranges of each channel are equal. For example, for channel CH A the measurement range amplitude of the i-th level of the measurement range of channel CH B is equal to the measurement range amplitude of the i-th level of the measurement range of channel CH The concept of the present invention

[0016] The basic principle of the present invention is that for two different channels CH A and channel CH B of the wide measurement range meter 2, select the i1 measurement range and i2 measurement range of channel CH A , and the j1 measurement range and j2 measurement range of channel CH B , and configure the phase calibration parameter (phase difference) between the channel signals S A , S B of each measurement range pair as a quadratic matrix shown in Table 1. The calculation formulas for the phase calibration parameters between the channel signals S A , S B of each measurement range pair are shown in Formulas (1) to Formula (4) respectively. Table 1: Matrix of pairs of measurement ranges of channels JPEG0007897659000001.jpg22145

[0017] PHS A S B (i1, j1) = PHS B [j1] - PHS A [i1]; (1) PHS A S B (i1, j2) = PHS B [j2]-PHS A [i1]; (2) PHS A S B (i2, j1) = PHS B [j1]-PHS A [i2]; (3) PHS A S B (i2, j2) = PHS B [j2]-PHS A [i2]; (4)

[0018] From formulas (1) to (4) above, the following equation (5) is obtained. PHS A S B (i1, j1) + PHS A S B (i2, j2) = PHS A S B (i1, j2) + PHS A S B (i2, j1); (5)

[0019] Therefore, for any set of quadratic matrix measurement ranges, if the phase calibration parameters for three of the measurement range sets are identified, the phase calibration parameters for the remaining measurement range set can be calculated using equation (5) above.

[0020] The inventors also discovered that when the RMS value of the signal input reaches 10% of the amplitude of the measurement range, the effect on the phase measurement characteristics becomes negligible. In particular, when the RMS value of the signal input reaches 40% of the amplitude of the measurement range, it has almost no effect on the phase measurement characteristics. Therefore, by utilizing the above characteristics, a pair of adjacent measurement ranges can be selected in which the smaller measurement range in an adjacent measurement range reaches 10% of the full-scale amplitude of the larger measurement range, and the phase calibration parameters of three pairs of measurement ranges in the quadratic matrix can be directly measured by utilizing the zero-phase characteristics of the channel input signal, and the phase calibration parameters of the other pair of measurement ranges can be calculated using equation (5) above. Thereafter, the phase calibration parameters of all pairs of measurement ranges can be calculated step by step in the same manner, freeing us from the limitation that voltage dividers and shunts must be used when the span of the measurement range is wide.

[0021] Figure 4 shows a flowchart of a zero-phase calibration method according to an embodiment of the present invention, which includes: step S1 selecting a set of identical measurement ranges and a set of adjacent measurement ranges consisting of a measurement range and the smaller of the two adjacent measurement ranges between different channels A and B of a wide measurement range meter, and measuring the phase calibration parameters between the channel signals of the set of identical measurement ranges and between the channel signals of the set of adjacent measurement ranges; step S2 completing the measurement of the phase calibration parameters for all sets of identical measurement ranges and adjacent measurement ranges and storing the measured phase calibration parameters in memory; step S3 recalling the measured phase calibration parameters stored in memory and stepwise calculating the phase calibration parameters between the channel signals of the remaining sets of measurement ranges of the wide measurement range meter; step S4 storing the phase calibration parameters calculated in step S3 in memory; and step S5, when calibrating the wide measurement range meter, recalling the corresponding phase calibration parameters stored in memory and calibrating the phase zero points between different channel signals of the wide measurement range meter.

[0022] In a preferred embodiment of the present invention, the ratio of the smaller measurement range to the larger measurement range in a pair of adjacent measurement ranges of a wide-range measuring meter is at least 0.1. In a non-limiting embodiment, wide The ratio of the smaller to the larger measurement range in a pair of adjacent measurement ranges of a measuring range meter may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9. For a wide measuring range meter, the ratio of the smaller to the larger measurement range in a pair of adjacent measurement ranges is particularly preferably 0.4 or 0.5.

[0023] Referring again to Figure 4, in step S1, the full-scale amplitude signal of the adjacent smaller measurement range is output from the standard source 3 to channels A and B of the wide measurement range meter 2, and the channel signals S of the same measurement range pair are output. A S B Channel signals S of the set of inter- and adjacent measurement ranges A S B Phase calibration parameter PHS A S B (1, 1), PHS A S B (1, 2), ..., PHS A S B (i, i), PHS A S B (i, i+1), ..., PHS A S B In step S2, measure (n, n), where n is the number of levels in the measurement range of the wide measurement range meter 2, and i is an integer such that 1 ≤ i ≤ n-1. In step S2, complete the measurement of the phase calibration parameters for all identical sets of measurement ranges and adjacent sets of measurement ranges, and store the measured phase calibration parameters in memory. In step S3, equation PHS is calculated. A S B (i1, j1) + PHS A S B (i2, j2) = PHS A S B (i1, j2) + PHS A S BCall the measured phase correction parameters stored in the memory according to (i2, j1), and the formula PHS A S B (i + 1, i) = PHS A S B (i, i) + PHS A S B (i + 1, i + 1) - PHS A S B Adopt (i, i + 1) for PHS A S B Calculate (i + 1, i) and the formula PHS A S B (j + 2, j) = PHS A S B (j + 1, j) + PHS A S B (j + 2, j + 1) - PHS A S B Adopt (j + 1, j + 1) for PHS A S B Calculate (j + 2, j) and the formula PHS A S B (j, j + 2) = PHS A S B (j, j + 1) + PHS A S B (j + 1, j + 2) - PHS A S B Adopt (j + 1, j + 1) for PHS A S B Calculate (j, j + 2), where j is an integer and l ≤ j ≤ n - 2. Similarly, for each set of measurement ranges of the remaining wide measurement range meter, the phase correction parameters between the channel signals S A 、S B are calculated step by step.

[0024] Referring to FIG. 5, FIG. 5 is a matrix diagram of the phase correction parameters between the channel signals of each set of measurement ranges when performing calibration by the zero phase correction method provided in an embodiment of the present invention. In FIG. 5, n is the number of levels of the measurement range of the wide measurement range meter 2, n is an integer and n ≥ 3, and i and j are the channels CH A or channel CH Brepresent the measurement range of the i-th level and the measurement range of the j-th level, where both i and j are integers and l ≤ i < j ≤ n - l, and the set of measurement ranges in the matrix diagram is for channel CH A a certain level of measurement range of and channel CH B is composed of a certain level of measurement range of. Channel CH A and channel CH B Among each set of measurement ranges of channel CH A and, the phase calibration parameter between the set of measurement ranges identified by the character M in the matrix diagram for channel signal S B is the parameter directly measured using the standard source in step S1 above, and the phase calibration parameter between the set of measurement ranges identified by the character C in the matrix diagram for channel signals S A and S B is the parameter calculated step by step according to the equation PHS A S B (i1, j1) + PHS A S B (i2, j2) = PHS A S B (i1, j2) + PHS A S B (i2, j1).

[0025] Referring to FIGS. 3 to 5 together, in the calibration environment of the zero-phase calibration method shown in FIG. 3, when calibrating the zero-phase point between different channels CH A and channel CH B of the wide measurement range meter 2 by adopting the zero-phase calibration method as in the present invention by the computer device 1, first, select a set of the same measurement range and a set of adjacent measurement ranges consisting of a measurement range and the smaller adjacent measurement range between different two channels CH A and channel CH B of the wide measurement range meter 2, and control the computer device 1 to output a full-scale amplitude signal of the smaller adjacent measurement range from the standard source 3, and synchronously input the two signals to channels CH A and channel CH BBy inputting this signal, the channel signals S of the same measurement range set are generated. A S B Channel signals S of the set of inter- and adjacent measurement ranges A S B The phase calibration parameters between the ranges (identified by the letter M in the matrix diagram in Figure 5) are measured, and the measured phase calibration parameters are transmitted to the memory of the computer device 1 via the interface of the wide measurement range meter 2 for storage. Next, after completing the measurement of the phase calibration parameters for all identical and adjacent measurement range sets and storing the measured phase calibration parameters in memory, the processor of the computer device 1 retrieves the measured phase calibration parameters stored in memory according to equation (5) above, and transmits the channel signals S of each remaining measurement range set of the wide measurement range meter 2. A S B The phase calibration parameters (identified by the letter C in the matrix diagram in Figure 5) are calculated step by step and stored in the memory of computer device 1. Finally, computer device 1 retrieves the corresponding phase calibration parameters stored in memory and uses them for channel CH of the wide measurement range meter 2. A and Channel CH B The phase zero point between the two is automatically calibrated. Furthermore, the computer device 1 can control the output signal of the standard source 3 by communicating with the standard source 3 via a USB interface. The communication method between the standard source 3 and the computer device 1 includes, but is not limited to, the GPIB method and the RS232 method.

[0026] The wide-range measuring meter 2 described herein has multiple channels, each channel having two or more level measuring ranges, and the range amplitudes of the corresponding level measuring ranges in each channel are equal. The channel measuring signals of such a wide-range, multi-channel meter may be AC ​​voltage signals or AC current signals. Non-limiting embodiments of the wide-range measuring meter 2 include a multi-channel vector voltage analyzer with a voltage measuring range of 2mV to 5V, a multi-channel phase meter with a voltage measuring range of 10mV to 630V, a three-phase standard wattmeter with a voltage measuring range of 60V to 720V, and a power analyzer with a voltage measuring range of 50mV to 1000V and a current measuring range of 5mA to 30A.

[0027] According to a preferred embodiment of the present invention, the wide-range measuring meter 2 is a multi-channel vector voltage analyzer with 11 levels in the measurement range, where the levels of the measurement ranges of two voltage measurement channels are set to [5V, 2V, 1V, 500mV, 200mV, 100mV, 50mV, 20mV, 10mV, 5mV, 2mV]. Below, a phase calibration experiment is performed on this vector voltage analyzer according to the method of the present invention to verify the effectiveness of the method of the present invention. Experimental data

[0028] In the experiment, for a typical calibration environment of the TH2000 model vector voltage analyzer developed by the applicant of this application, three signal frequencies were selected as the input voltage signal frequencies for the vector voltage analyzer: a power supply frequency of 53 Hz for standard source 3, an intermediate frequency of 1 kHz, and a high frequency of 10 kHz. In the experiment, calibration parameters obtained by measurement and calculation at the intermediate frequency of 1 kHz were selected as the reference. First, the phase calibration parameters between channel signals in sets of the same measurement range and between channel signals in sets of adjacent measurement ranges were measured. Once the measurement of phase calibration parameters for all sets of the same and adjacent measurement ranges was completed and the measured phase calibration parameters were stored in memory, the measured phase calibration parameters stored in memory were recalled, and the phase calibration parameters between channel signals for each remaining set of measurement ranges of the wide measurement range meter were calculated step by step and stored in memory. Then, the corresponding phase calibration parameters stored in memory were recalled to automatically calibrate the phase zero point between channels of the vector voltage analyzer.

[0029] Table 2 below shows the phase calibration parameters obtained by measurement and calculation at an intermediate frequency of 1 kHz (unit: nanoseconds [ns], RG1 is channel CH). A signal S A The measurement range selected is RG2, channel CH B signal S B This is the measurement range selected. Table 2: Phase Calibration Parameter Table JPEG0007897659000002.jpg51152

[0030] Note that the underlined values ​​in Table 2 above belong to the directly measured phase calibration parameters (the ratio of the smaller measurement range to the larger measurement range in a pair of adjacent measurement ranges is 0.4 or 0.5), while the other values ​​belong to the phase calibration parameters calculated by the method of the present invention.

[0031] Furthermore, in the experiment, the requirement that the ratio of the smaller measurement range to the larger measurement range in a set of measurement ranges be 0.1 was met, and for sets of measurement ranges including measurement ranges of 100mV or more, the actual phase difference before calibration was measured, and the corresponding data shown in Table 2 above was converted to angle values ​​and compared with them to evaluate the effect of measurement error. As a result, it was found that the phase error was within 2μrad at a power supply frequency of 53Hz, within 1μrad at an intermediate frequency of 1kHz, and within 10μrad at a high frequency of 10kHz. Those skilled in the art will know that the above error values ​​are within a negligible range at the corresponding frequencies. From this, it was verified that, as described above in the present invention, when the effective value of the signal input reaches 10% of the amplitude of the measurement range, the effect on the phase measurement characteristics is negligible.

[0032] The effectiveness of the zero-phase calibration method of the present invention is evaluated by selecting data that satisfies the requirements from among the phase differences measured after the vector voltage analyzer has written the phase calibration parameters.

[0033] Specifically, Table 3 below shows the phase difference (in μrad, RG1 is channel CH) measured after the vector voltage analyzer was programmed with the phase calibration parameters shown in Table 2, when the input signal was at a power supply frequency of 53 Hz. A signal S A The measurement range selected is RG2, channel CH B signal S B This is the measurement range selected. Note that the measurement range sets not marked with a diagonal line in Table 3 satisfy the requirement that the ratio of the smaller measurement range to the larger measurement range reaches 0.1, and the phase difference measurements shown in the boxes for such measurement range sets are quite accurate and can be used to evaluate the effectiveness of phase calibration. The measurement range sets marked with a diagonal line in Table 3 do not satisfy the requirement that the ratio of the smaller measurement range to the larger measurement range reaches 0.1, and the error in the measured phase difference values ​​may be too large, so they are shown in the table for reference. Table 3: Phase difference measured after writing phase calibration parameters at a power supply frequency of 53 Hz JPEG0007897659000003.jpg55154

[0034] As can be seen from the data in Table 3, at a power supply frequency of 53 Hz, the absolute values ​​of the phase difference measured after the vector voltage analyzer had the phase calibration parameters shown in Table 2, obtained by the method of the present invention, written in, are all quite small. Among the sets of measurement ranges that are not shaded, the absolute values ​​of the phase difference for the sets of measurement ranges that include only measurement ranges of 100 mV or more are all within 2 μrad, and the absolute values ​​of the phase difference for the sets of measurement ranges that include only measurement ranges of 100 mV or less are all within 10 μrad. As those skilled in the art know, such phase difference values ​​are within a range that can be almost ignored at the level of the corresponding frequency and measurement range, so it can be determined that the vector voltage analyzer has been calibrated and the phase difference has returned to zero.

[0035] Table 4 below shows the phase difference (in μrad, RG1 is channel CH) measured after the vector voltage analyzer was programmed with the phase calibration parameters shown in Table 2, when the input signal had an intermediate frequency of 1 kHz. A signal S A The measurement range selected is RG2, channel CH B signal S BThis is the measurement range selected. Similarly, the sets of measurement ranges not shaded in Table 4 satisfy the requirement that the ratio of the smaller measurement range to the larger measurement range reaches 0.1 and can be used to evaluate the degree of phase calibration. As can be seen from the data in Table 4, at an intermediate frequency of 1 kHz, the absolute values ​​of the phase difference measured after the vector voltage analyzer had the phase calibration parameters shown in Table 2 obtained by the method of the present invention written in are all quite small. Among the sets of measurement ranges not shaded, the absolute values ​​of the phase difference for the sets of measurement ranges that only include measurement ranges of 100 mV or more are all within 1 μrad, and the absolute values ​​of the phase difference for the sets of measurement ranges that only include measurement ranges of 100 mV or less are all within 10 μrad. As those skilled in the art will know, such numerical values ​​of phase difference are in a range that is almost negligible at the level of the corresponding frequency and measurement range, so it can be determined that the vector voltage analyzer has been calibrated and the phase difference has returned to zero. Table 4: Phase difference measured after writing phase calibration parameters at an intermediate frequency of 1 kHz JPEG0007897659000004.jpg55152

[0036] Table 5 below shows the phase difference (in μrad, RG1 is channel CH) measured after the vector voltage analyzer was programmed with the phase calibration parameters shown in Table 2 when the input signal was a high frequency of 10 kHz. A signal S A The measurement range selected is RG2, channel CH B signal S B This is the measurement range selected. Table 5: Phase difference measured after writing phase calibration parameters at a high frequency of 10 kHz JPEG0007897659000005.jpg55152

[0037] Similarly, the measurement range sets in Table 5 that are not shaded satisfy the requirement that the ratio of the smaller measurement range to the larger measurement range reaches 0.1, and can be used to evaluate the degree of phase calibration. As can be seen from the data in Table 5, at a high frequency of 10 kHz, the absolute values ​​of the phase difference measured after the vector voltage analyzer had the phase calibration parameters shown in Table 2, obtained by the method of the present invention, written in, are all quite small. Among the measurement range sets that are not shaded, the absolute values ​​of the phase difference for measurement range sets that only include measurement ranges of 100 mV or more are all within 10 μrad, and the absolute values ​​of the phase difference for measurement range sets that only include measurement ranges of 100 mV or less are all within 50 μrad. As those skilled in the art will know, such phase difference values ​​are within a range that can be almost ignored at the level of the corresponding frequency and measurement range, so it can be determined that the vector voltage analyzer has been calibrated and the phase difference has returned to zero.

[0038] Therefore, the above experiment revealed that by applying the zero-phase calibration method of the present invention, the phase zero point between different channel signals of a wide-range measuring meter can be effectively calibrated at various frequencies.

[0039] The following points should be explained: The above embodiments are for illustrative purposes only and do not limit the technical solutions of the present invention. Under the concept of the present invention, the technical features of the above embodiments or different embodiments may be combined, these steps may be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that it is still possible to modify the technical solutions described in each of the above embodiments or to equally replace some of their technical features. These modifications or substitutions do not depart the essence of the corresponding technical solutions from the scope of the technical solutions of each embodiment of the present invention. Those skilled in the art can also make several variations and improvements without departing from the concept of the present invention, which are within the scope of the protection of the present invention.

[0040] While the steps in the flowchart in Figure 4 are shown sequentially according to the arrows, it should be understood that these steps are not necessarily executed sequentially according to the arrows. Unless otherwise specified in this document, there are no strict order restrictions on the execution of these steps, and they may be executed in other orders. Furthermore, at least some of the steps in Figure 4 may include multiple substeps or stages, and the execution of these substeps or stages does not necessarily have to be completed at the same time; they may be executed at different times, and the execution order of these substeps or stages does not necessarily have to be consecutive; they may be executed sequentially or alternately with other steps or at least some of the substeps or stages of other steps.

[0041] A computer device comprises memory in which computer-readable instructions are stored, and one or more processors, and when one or more processors execute a computer-readable instruction, Step S1 involves selecting a set of identical measurement ranges and a set of adjacent measurement ranges consisting of a measurement range and the smaller of the two adjacent measurement ranges between different channels A and B of a wide measurement range meter, and measuring the phase calibration parameters between the channel signals of the set of identical measurement ranges and between the channel signals of the set of adjacent measurement ranges. Step S2 completes the measurement of phase calibration parameters for all sets of the same measurement range and adjacent measurement ranges, and stores the measured phase calibration parameters in memory. Step S3 involves retrieving the measured phase calibration parameters stored in memory and stepwise calculating the phase calibration parameters between the channel signals for each remaining set of measurement ranges of the wide measurement range meter. Step S4 involves storing the phase calibration parameters calculated in step S3 into memory, When calibrating a wide range meter, step S5 is performed to calibrate the phase zero point between different channel signals of the wide range meter by recalling the corresponding phase calibration parameters stored in memory.

[0042] In some embodiments, the ratio of the smaller measurement range to the larger measurement range in a pair of adjacent measurement ranges of a wide-range measuring meter is at least 0.1.

[0043] In some embodiments, step S1 outputs the full-scale amplitude signal of the adjacent and smaller measurement range from the standard source to channels A and B of the wide measurement range meter, and the channel signal S of the same measurement range pair A S B Channel signals S of the set of inter- and adjacent measurement ranges A S B Phase calibration parameter PHS A S B (1, 1), PHS A S B (1, 2), ..., PHS A S B (i, i), PHS A S B (i, i+1), ..., PHS A S B Measure (n, n), where n is the number of levels in the measurement range of the wide range meter, and i is an integer such that 1 ≤ i ≤ n-1.

[0044] In some embodiments, step S3 is given by equation PHS A S B (i1, j1) + PHS A S B (i2, j2) = PHS A S B (i1, j2) + PHS A S B According to (i2, j1), the measured phase calibration parameters stored in memory are recalled, and the official PHS A S B (i+1, i) = PHS A S B (i, i) + PHS A S B (i+1, i+1)-PHS A S B PHS adopts (i, i+1) AS B Calculate (i+1, i) and the official PHS A S B (j+2, j) = PHS A S B (j+1, j)+PHS A S B (j+2, j+1)-PHS A S B (j+1, j+1) is used for PHS A S B Calculate (j+2, j) and use the official PHS A S B (j, j+2) = PHS A S B (j, j+1)+PHS A S B (j+1, j+2)-PHS A S B (j+1, j+1) is used for PHS A S B (j, j+2) is calculated, where j is an integer and l ≤ j ≤ n-2, and similarly thereafter, the channel signals S of each remaining set of measurement ranges of the wide measurement range meter are calculated. A S B The phase calibration parameters between the points are calculated step by step.

[0045] In some embodiments, the ratio of the smaller measurement range to the larger measurement range in a pair of adjacent measurement ranges of a wide-range measuring meter is 0.4 or 0.5.

[0046] In some embodiments, the channel signal is an AC voltage signal.

[0047] Computer-readable storage media that store computer-readable instructions are computer-readable storage media that store computer-readable instructions One or more When executed on a processor, one or more processors Step S1 involves selecting a set of identical measurement ranges and a set of adjacent measurement ranges consisting of a measurement range and the smaller of the two adjacent measurement ranges between different channels A and B of a wide measurement range meter, and measuring the phase calibration parameters between the channel signals of the set of identical measurement ranges and between the channel signals of the set of adjacent measurement ranges. Step S2 completes the measurement of phase calibration parameters for all sets of the same measurement range and adjacent measurement ranges, and stores the measured phase calibration parameters in memory. Step S3 involves retrieving the measured phase calibration parameters stored in memory and stepwise calculating the phase calibration parameters between the channel signals for each remaining set of measurement ranges of the wide measurement range meter. Step S4 involves storing the phase calibration parameters calculated in step S3 into memory, When calibrating the wide range meter, step S5 is performed, which involves retrieving the corresponding phase calibration parameters stored in memory to calibrate the phase zero points between different channel signals of the wide range meter.

[0048] In some embodiments, the ratio of the smaller measurement range to the larger measurement range in a pair of adjacent measurement ranges of a wide-range measuring meter is at least 0.1.

[0049] In some embodiments, step S1 outputs the full-scale amplitude signal of the adjacent and smaller measurement range from the standard source to channels A and B of the wide measurement range meter, and the channel signal S of the same measurement range pair A S B Channel signals S of the set of inter- and adjacent measurement ranges A S B Phase calibration parameter PHS A S B (1, 1), PHS A S B (1, 2), ..., PHS A S B (i, i), PHS A SB (i, i+1), ..., PHS A S B Measure (n, n), where n is the number of levels in the measurement range of the wide range meter, and i is an integer such that 1 ≤ i ≤ n-1.

[0050] In some embodiments, step S3 is given by equation PHS A S B (i1, j1) + PHS A S B (i2, j2) = PHS A S B (i1, j2) + PHS A S B According to (i2, j1), the measured phase calibration parameters stored in memory are recalled, and the official PHS A S B (i+1, i) = PHS A S B (i, i) + PHS A S B (i+1, i+1)-PHS A S B PHS adopts (i, i+1) A S B Calculate (i+1, i) and the official PHS A S B (j+2, j) = PHS A S B (j+1, j)+PHS A S B (j+2, j+1)-PHS A S B (j+1, j+1) is used for PHS A S B Calculate (j+2, j) and use the official PHS A S B (j, j+2) = PHS A S B (j, j+1)+PHS A S B (j+1, j+2)-PHS A S B (j+1, j+1) is used for PHS A S B(j, j+2) is calculated, where j is an integer and l ≤ j ≤ n-2, and similarly thereafter, the channel signals S of each remaining set of measurement ranges of the wide measurement range meter are calculated. A S B The phase calibration parameters between the points are calculated step by step.

[0051] In some embodiments, the ratio of the smaller measurement range to the larger measurement range in a pair of adjacent measurement ranges of a wide-range measuring meter is 0.4 or 0.5.

[0052] In some embodiments, the channel signal is an AC voltage signal.

[0053] Those skilled in the art will understand that implementing all or part of the flow in the methods according to the above embodiments can be completed by instructing the relevant hardware with computer-readable instructions, and if the computer-readable instructions are stored in a non-volatile computer-readable storage medium and executed, the flow in each embodiment of the above embodiments can be included. Herein, any reference to memory, storage, data library or other medium employed in each embodiment provided in the present invention can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. RAM can be obtained in various forms, not as a limitation but as a description, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced (ESDRAM), synchlink DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0054] The technical features in the above embodiments can be combined in any way, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as these combinations of technical features are not contradictory, they should be considered to fall within the scope described herein.

[0055] The above examples merely illustrate some embodiments of the present invention, and although the descriptions are relatively specific and detailed, they should not be understood as limiting the scope of the patent protection of the invention. Furthermore, those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these fall within the scope of protection of the present invention. Therefore, the scope of patent protection of the present invention shall be in accordance with the appended claims.

Claims

1. A zero-phase calibration method for calibrating the phase zero point between different channel signals of a wide-range measuring meter, Between the different channels A and B of the wide measuring range meter, a set of identical measuring ranges and a set of adjacent measuring ranges consisting of the aforementioned measuring range and the smaller measuring range adjacent to it are selected, and the full-scale amplitude signal of the smaller adjacent measuring range is output from the standard source to channels A and B of the wide measuring range meter, and the phase calibration parameter PHSASB(1) between the channel signals SA and SB of the set of identical measuring ranges is selected. Step S1 involves measuring the phase calibration parameters PHSASB(1,2), PHSASB(2,3), PHSASB(i,i), PHSASB(n-1,n-1), PHSASB(n,n) between the channel signals SA and SB of the set of adjacent measurement ranges, where n is the number of levels in the measurement range of the wide measurement range meter and i is an integer. Step S2 completes the measurement of phase calibration parameters for all identical sets of measurement ranges and adjacent sets of measurement ranges, and stores the measured phase calibration parameters in memory. According to the equation PHSASB(i1, j1) + PHSASB(i2, j2) = PHSASB(i1, j2) + PHSASB(i2, j1), the measured phase calibration parameters stored in the memory are retrieved, and PHSASB(i+1, i) is calculated using the formula PHSASB(i+1, i) = PHSASB(i, i) + PHSASB(i+1, i+1) - PHSASB(i, i+1), and PHSASB(i+1, i) is calculated using the formula PHSASB(j+2, j) = PHSASB(j+1, j) + PHSASB(j+2, Step S3 involves calculating PHSASB(j+2, j) using j+1) - PHSASB(j+1, j+1), calculating PHSASB(j, j+2) using the formula PHSASB(j, j+2) = PHSASB(j, j+1) + PHSASB(j+1, j+2) - PHSASB(j+1, j+1), and then step S3 involves calculating the phase calibration parameter between the channel signals SA and SB for each remaining set of measurement ranges of the wide measurement range meter, where j is an integer and l ≤ j ≤ n-2 and 1 ≤ i ≤ n-1. Step S4 involves storing the phase calibration parameters calculated in step S3 in the memory, A zero-phase calibration method that includes step S5 of calibrating the wide measuring range meter by calling up a corresponding phase calibration parameter stored in the memory to calibrate the phase zero point between different channel signals of the wide measuring range meter.

2. The method according to claim 1, characterized in that the ratio of the smaller measurement range to the larger measurement range in the pair of adjacent measurement ranges of the wide measurement range meter reaches at least 0.

1.

3. The method according to claim 2, characterized in that the ratio of the smaller measurement range to the larger measurement range in the pair of adjacent measurement ranges of the wide measurement range meter is 0.4 or 0.

5.

4. The method according to the present invention, characterized in that the channel signal is an AC voltage signal.

5. The method according to the present invention, characterized in that the channel signal is an AC current signal.

6. A computer device comprising a memory storing computer-readable instructions and one or more processors, wherein when the one or more processors execute the computer-readable instructions, Between channels A and B of the wide-range measuring meter, a set of identical measuring ranges and a set of adjacent measuring ranges consisting of the said measuring range and the smaller measuring range adjacent to it are selected, and the full-scale amplitude signal of the smaller adjacent measuring range is output from the standard source to channels A and B of the wide-range measuring meter, and the phase calibration parameter PHSASB(1, Step S1 involves measuring the phase calibration parameters PHSASB(1,2), PHSASB(2,3), PHSASB(i,i), PHSASB(n-1,n-1), PHSASB(n,n) and the channel signals SA and SB of the set of adjacent measurement ranges, where n is the number of levels in the measurement range of the wide measurement range meter and i is an integer. Step S2 completes the measurement of phase calibration parameters for all identical sets of measurement ranges and adjacent sets of measurement ranges, and stores the measured phase calibration parameters in memory. According to the equation PHSASB(i1, j1) + PHSASB(i2, j2) = PHSASB(i1, j2) + PHSASB(i2, j1), the measured phase calibration parameters stored in the memory are retrieved, and PHSASB(i+1, i) is calculated using the formula PHSASB(i+1, i) = PHSASB(i, i) + PHSASB(i+1, i+1) - PHSASB(i, i+1), and PHSASB(i+1, i) is calculated using the formula PHSASB(j+2, j) = PHSASB(j+1, j) + PHSASB(j+2, Step S3 involves calculating PHSASB(j+2, j) using j+1) - PHSASB(j+1, j+1), calculating PHSASB(j, j+2) using the formula PHSASB(j, j+2) = PHSASB(j, j+1) + PHSASB(j+1, j+2) - PHSASB(j+1, j+1), and then step S3 involves calculating the phase calibration parameter between the channel signals SA and SB for each remaining set of measurement ranges of the wide measurement range meter, where j is an integer and l ≤ j ≤ n-2 and 1 ≤ i ≤ n-1. Step S4 involves storing the phase calibration parameters calculated in step S3 in the memory, A computer device that, when calibrating the wide measuring range meter, performs step S5 of calibrating the phase zero point between different channel signals of the wide measuring range meter by calling up a corresponding phase calibration parameter stored in the memory.

7. The computer device according to claim 6, characterized in that the ratio of the smaller measurement range to the larger measurement range in the pair of adjacent measurement ranges of the wide measurement range meter reaches at least 0.

1.

8. A non-volatile computer-readable storage medium in which computer-readable instructions are stored, wherein when the computer-readable instructions are executed by one or more processors, the one or more processors Between channels A and B of the wide-range measuring meter, a set of identical measuring ranges and a set of adjacent measuring ranges consisting of the said measuring range and the smaller measuring range adjacent to it are selected, and the full-scale amplitude signal of the smaller adjacent measuring range is output from the standard source to channels A and B of the wide-range measuring meter, and the phase calibration parameter PHSASB(1, Step S1 involves measuring the phase calibration parameters PHSASB(1,2), PHSASB(2,3), PHSASB(i,i), PHSASB(n-1,n-1), PHSASB(n,n) and the channel signals SA and SB of the set of adjacent measurement ranges, where n is the number of levels in the measurement range of the wide measurement range meter and i is an integer. Step S2 completes the measurement of phase calibration parameters for all identical sets of measurement ranges and adjacent sets of measurement ranges, and stores the measured phase calibration parameters in memory. According to the equation PHSASB(i1, j1) + PHSASB(i2, j2) = PHSASB(i1, j2) + PHSASB(i2, j1), the measured phase calibration parameters stored in the memory are retrieved, and PHSASB(i+1, i) is calculated using the formula PHSASB(i+1, i) = PHSASB(i, i) + PHSASB(i+1, i+1) - PHSASB(i, i+1), and PHSASB(i+1, i) is calculated using the formula PHSASB(j+2, j) = PHSASB(j+1, j) + PHSASB(j+2, Step S3 involves calculating PHSASB(j+2, j) using j+1) - PHSASB(j+1, j+1), calculating PHSASB(j, j+2) using the formula PHSASB(j, j+2) = PHSASB(j, j+1) + PHSASB(j+1, j+2) - PHSASB(j+1, j+1), and then step S3 involves calculating the phase calibration parameter between the channel signals SA and SB for each remaining set of measurement ranges of the wide measurement range meter, where j is an integer and l ≤ j ≤ n-2 and 1 ≤ i ≤ n-1. Step S4 involves storing the phase calibration parameters calculated in step S3 in the memory, A non-volatile computer-readable storage medium that, when calibrating the wide range measuring meter, causes the system to perform step S5, which involves calling up corresponding phase calibration parameters stored in the memory to calibrate the phase zero points between different channel signals of the wide range measuring meter.

9. The storage medium according to claim 8, characterized in that the ratio of the smaller measurement range to the larger measurement range in the pair of adjacent measurement ranges of the wide measurement range meter reaches at least 0.1.

Images