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] The present invention relates to the field of phase calibration, and more particularly 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 measurement meter, such as a vector voltage analyzer, it is possible to achieve functions such as multi-channel voltage or current ratio and phase difference measurements, and even power measurements using combined voltage and current channels. To ensure measurement accuracy, such meters typically require calibration of the channel voltage / current effective values ​​and inter-channel phase difference error before use. Currently, channel phase difference calibration for vector voltage analyzers and other multi-channel measurement instruments (e.g., phase meters) typically employs a high-stability, low-noise, high-precision signal source with adjustable amplitude and frequency, and directly calibrates the zero-phase point using a voltage divider or shunt. Because wide-range measurement meters have a large number of channels and measurement range levels, a large number of measurement range sets require calibration. Current calibration methods rely on manual calibration, which is inefficient, lacks accuracy, and requires long calibration cycles. Automatic calibration methods require scanning all measurement range sets, resulting in a very time-consuming calibration process.

[0003] Furthermore, when measuring with a wide measurement range meter, if there is a pair of large and small measurement ranges with fairly 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 small measurement range channel to perform initial calibration. However, this is limited by the phase frequency characteristics of the voltage divider or shunt, and this calibration method does not allow for highly accurate phase measurement and transmission.

[0004] Therefore, the current phase calibration method cannot meet the requirements for accuracy and efficiency of phase frequency calibration of wide measurement range meters. Summary of the Invention

[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 measurement range meter, Step S1: selecting a pair of identical measurement ranges and a pair of adjacent measurement ranges consisting of a measurement range and a smaller measurement range adjacent to the measurement range between different channels A and B of the wide measurement range meter, and measuring phase calibration parameters between the channel signals of the pair of identical measurement ranges and the channel signals of the pair of adjacent measurement ranges; Step S2 of completing the measurement of the phase calibration parameters of all pairs of the same measurement range and pairs of adjacent measurement ranges and storing the measured phase calibration parameters in a memory; Step S3: Calling the measured phase calibration parameters stored in the memory and calculating the phase calibration parameters between the channel signals of each remaining set of measurement ranges of the wide measurement range meter step by step; Step S4: storing the phase calibration parameters calculated in step S3 in a memory; When calibrating the wide measurement range meter, the method includes step S5 of calling the corresponding phase calibration parameters stored in the memory to calibrate the phase zero points between different channel signals of the wide measurement range meter.

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

[0008] One or more non-volatile computer-readable storage media having computer-readable instructions stored thereon, when executed by one or more processors, cause the one or more processors to implement the steps of the zero phase calibration method provided in any one of the embodiments of the present invention. Details of one or more embodiments of the present invention are set forth in the drawings and description that follow. Other features and advantages of the present invention will be apparent from the description, drawings, and claims. [Brief explanation of the drawings]

[0009] In order to more clearly explain the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below. However, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work. [Figure 1] FIG. 1 is a connection diagram of a vector voltage analyzer using a voltage divider according to one or more embodiments for zero-phase calibration of a large measurement range channel and a small measurement range channel. [Figure 2] 1 is a schematic diagram of an application environment for a zero phase calibration method according to one or more embodiments. [Figure 3] FIG. 1 is a schematic diagram of a calibration environment for a zero phase calibration method according to one or more embodiments. [Figure 4] 1 is a flowchart of a zero phase calibration method according to one or more embodiments. [Figure 5] FIG. 10 is a matrix diagram of phase calibration parameters between channel signals for each measurement range pair when performing calibration using a zero-phase calibration method according to one or more embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0010] In order to make the technical solutions and advantages of the present invention more apparent, the present 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 are not intended to limit the present invention.

[0011] Referring to Figure 1, Figure 1 is a connection diagram of the zero phase calibration of the large measurement range channel and the small measurement range channel of a vector voltage analyzer using a voltage divider in the prior art. As shown in Figure 1, when measuring with a vector voltage analyzer, different channels CH A , C.H. B There is a pair of a 5V large measurement range and a 2mV small measurement range between them, and the initial calibration is performed by outputting two full-scale amplitude signals of the 5V large measurement range from the high-precision signal source, and connecting one of the signals to the 5V large measurement range channel CH of the vector voltage analyzer to be calibrated. A The other signal is introduced into a voltage divider to obtain a small amplitude signal with a small measurement range of 2 mV, and then the small measurement range of the vector voltage analyzer to be calibrated is input to the channel CH B However, this calibration method is limited by the phase-frequency characteristics of the voltage divider and does not allow for highly accurate phase measurement and transfer. In addition, for pairs of channels in a vector voltage analyzer with a wide measurement range, it is necessary to perform initial calibration by obtaining a corresponding small-amplitude signal using a voltage divider and inputting it into the channel with the small measurement range, which makes the calibration process very time-consuming.

[0012] In order to make the objects and advantages of the present invention more apparent, the technical solutions according to the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments.

[0013] Referring to FIG. 2, FIG. 2 is a schematic diagram of an application environment of a zero-phase calibration method provided by an embodiment of the present invention. In the application environment shown in FIG. 2, a computer device may be a service, and its internal structure may be as shown in FIG. 2. The computer device includes a processor, a memory, an interface, and a data library, which are connected via a system bus. Here, the processor of the computer device is used to provide calculation and control functions. The memory of the computer device includes a non-volatile storage medium and an 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 a calibration environment for a zero-phase calibration method provided by an embodiment of the present invention. In the calibration environment shown in Figure 3, a computer device 1 realizes automatic calibration of the phase zero points between different channels of a wide measurement range meter 2. The computer device 1 is similar to the computer device shown in Figure 2 above, so a description thereof will be omitted here.

[0015] In the embodiment shown in FIG. 3, the wide measurement range meter 2 has two different channels CH A and Channel CH BThe calibration of the phase zero point between is an automatic calibration performed by a computer device 1 executing the zero phase calibration method claimed in the present invention to control a standard source 3. A wide measurement range meter 2 is a meter with a wide measurement range and multiple signal channels, including but not limited to a vector voltage analyzer, a phase meter, a three-phase standard watt-hour meter, etc. Such a meter has two or more signal channels, each with multiple levels of measurement range, and the measurement range amplitudes of the corresponding levels of the measurement ranges of each channel are equal. For example, channel CH A The measurement range and channel CH of the i-th level B The measurement range amplitude of the i-th level measurement range is equal. The standard source 3 is a high-stability, low-noise, high-precision signal source with adjustable output amplitude and frequency, such as the TD1880 model multi-function calibrator developed by the applicant of the present application. Concept of the present invention

[0016] The basic principle of the present invention is to measure two different channels CH of the wide measurement range meter 2. A and Channel CH B About Channel CH A i1 measurement range and i2 measurement range, and channel CH B Select the j1 and j2 measurement ranges, and measure the channel signal S A , S B The phase calibration parameters (phase difference) between the channels are configured as a second-order matrix shown in Table 1. A , S B The calculation formulas for the phase calibration parameters between are shown in formulas (1) to (4), respectively. Table 1: Channel measurement range pair matrix JPEG2025535615000002.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 the above formulas (1) to (4), 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 measurement ranges in the quadratic matrix format, if the phase calibration parameters of the set of three measurement ranges are specified, the phase calibration parameters of the other set of measurement ranges can be calculated using the above equation (5).

[0020] The inventors also discovered that when the effective signal input value reaches 10% of the measurement range amplitude, the effect on the phase measurement characteristics is negligible. In particular, when the effective signal input value reaches 40% of the measurement range amplitude, the effect on the phase measurement characteristics is negligible. Therefore, by utilizing this characteristic, a pair of adjacent measurement ranges is selected in which the smaller measurement range reaches 10% of the full-scale amplitude of the larger measurement range. Using the zero-phase characteristics of the channel input signal, the phase calibration parameters of three pairs of measurement ranges in the second-order matrix can be directly measured, and the phase calibration parameters of the other pair of measurement ranges can be calculated using the above equation (5). Similarly, the phase calibration parameters of all pairs of measurement ranges can be calculated stepwise, eliminating the need for voltage dividers or shunts when the measurement range span is wide.

[0021] FIG. 4 shows a flowchart of a zero phase calibration method according to an embodiment of the present invention. This method includes step S1 of selecting a pair of identical measurement ranges and a pair of adjacent measurement ranges consisting of a measurement range and a smaller measurement range adjacent to the selected measurement range between different channels A and B of a wide measurement range meter, and measuring phase calibration parameters between channel signals in the pair of identical measurement ranges and between channel signals in the pair of adjacent measurement ranges; step S2 of completing the measurement of phase calibration parameters for all pairs of identical measurement ranges and pairs of adjacent measurement ranges and storing the measured phase calibration parameters in memory; step S3 of calling up the measured phase calibration parameters stored in memory to gradually calculate phase calibration parameters between channel signals in each remaining pair of measurement ranges of the wide measurement range meter; step S4 of storing the phase calibration parameters calculated in step S3 in memory; and step S5 of calling up the corresponding phase calibration parameters stored in memory when calibrating the wide measurement range meter, to calibrate the phase zero points between different channel signals of the wide measurement range meter.

[0022] According to a preferred embodiment of the present invention, the ratio between the smaller measurement range and the larger measurement range in a set of adjacent measurement ranges of the wide measurement range meter is at least 0.1. By way of non-limiting example, the ratio between the smaller measurement range and the larger measurement range in a set of adjacent measurement ranges of the wide measurement range meter may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9. It is particularly preferred that the ratio between the smaller measurement range and the larger measurement range in a set of adjacent measurement ranges of the wide measurement range meter is 0.4 or 0.5.

[0023] Referring again to FIG. 4, in step S1, the full-scale amplitude signals of the adjacent smaller measurement ranges are output from the standard source 3 to the 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 signal S between adjacent measurement range pairs A , S B Phase calibration parameters between 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 (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 and 1≦i≦n−1; in step S2, the measurement of the phase calibration parameters of all pairs of the same measurement range and pairs of adjacent measurement ranges is completed, and the measured phase calibration parameters are stored in memory; in step S3, the equation PHS A S B (i1, j1)+PHS A S B (i2, j2) = PHS A S B (i1, j2) + PHS A S BAccording to (i2, j1), the measured phase calibration parameters stored in memory are called up 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 (i, i+1) is adopted for PHS A S B Calculate (i+1, i) and use 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 adopted to 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 adopted to PHS A S B (j, j+2), where j is an integer and l≦j≦n−2, and so on to calculate the channel signals S for each remaining pair of measurement ranges of the wide measurement range meter. A , S B The phase calibration parameters between the two points are calculated step by step.

[0024] 5, which is a matrix diagram of phase calibration parameters between channel signals of each measurement range pair when performing calibration using the zero-phase calibration method provided in one embodiment of the present invention. In FIG. 5, n is the number of levels in the measurement range of the wide measurement range meter 2, n is an integer and n≧3, and i and j are the channel CH of the wide measurement range meter 2, respectively. 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. 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 channel CH B The phase calibration parameter between is the parameter directly measured using the standard source in step S1 above. For the set of measurement ranges identified by the character C in the matrix diagram, for channel signals S A and S B The phase calibration parameter between 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<"0000111">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 two different channels CH A and channel CH B of the wide measurement range meter 2. Control the computer device 1 to output the 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 the same measurement range channel signal S A , S B Channel signal S between adjacent measurement range pairs A , S B 5) and transmits and stores the measured phase calibration parameters to the memory of the computer device 1 via the interface of the wide measurement range meter 2. Next, after completing the measurement of the phase calibration parameters of all the pairs of identical measurement ranges and pairs of adjacent measurement ranges 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 the above equation (5) and calculates the channel signals S of each remaining pair of measurement ranges of the wide measurement range meter 2. A , S B 5) and store them in the memory of the computer device 1. Finally, the computer device 1 retrieves the corresponding phase calibration parameters stored in the memory and calculates the phase calibration parameters for the channels CH of the wide measurement range meter 2. A and Channel CH B 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, and communication methods between the standard source 3 and the computer device 1 include, but are not limited to, GPIB and RS232.

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

[0027] According to a preferred embodiment of the present invention, the wide measurement range meter 2 is a multi-channel vector voltage analyzer with a measurement range level number n of 11, where the measurement range levels of the 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 described in 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, three signal frequencies were selected as the input voltage signal frequencies of the vector voltage analyzer: the power frequency of 53 Hz of the standard source 3, an intermediate frequency of 1 kHz, and a high frequency of 10 kHz. In the experiment, the calibration parameters measured and calculated at the intermediate frequency of 1 kHz were selected as the reference. First, the phase calibration parameters between channel signals in the same measurement range pair and between channel signals in adjacent measurement range pairs were measured. After measuring the phase calibration parameters for all the same measurement range pairs and adjacent measurement range pairs and storing the measured phase calibration parameters in memory, the measured phase calibration parameters stored in memory were called up to stepwise calculate the phase calibration parameters between channel signals in each remaining measurement range pair of the wide measurement range meter and store them in memory. After that, the corresponding phase calibration parameters stored in memory were called up to automatically calibrate the phase zero point between the channels of the vector voltage analyzer.

[0029] Table 2 below shows the phase calibration parameters measured and calculated at an intermediate frequency of 1 kHz (unit: nanoseconds [ns], RG1 is the channel CH A signal S A RG2 is the selected measurement range, and RG3 is the channel CH B signal S B (measurement range selected in Table 2: Phase calibration parameter table JPEG2025535615000003.jpg51152

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

[0031] In addition, in the experiment, the ratio of the smaller measurement range to the larger measurement range in a measurement range set was required to meet the requirement of 0.1. For a measurement range set including a measurement range of 100 mV or greater, the actual phase difference before calibration was measured. The corresponding data in Table 2 above was converted to angle values ​​and compared with the converted values ​​to evaluate the impact of measurement errors. The results showed that the phase error was within 2 μrad at a power frequency of 53 Hz, within 1 μrad at an intermediate frequency of 1 kHz, and within 10 μrad at a high frequency of 10 kHz. Those skilled in the art will recognize that these error values ​​are within negligible ranges at the corresponding frequencies. This demonstrates that, as described above in this invention, the impact on phase measurement characteristics is negligible when the signal input effective value reaches 10% of the measurement range amplitude.

[0032] Hereinafter, data that meets the requirements will be selected from the phase differences measured after the vector voltage analyzer has written the phase calibration parameters, and the effectiveness of the zero phase calibration method of the present invention will be evaluated.

[0033] Specifically, Table 3 below shows the phase difference (unit: μrad, RG1 is channel CH) measured after the vector voltage analyzer writes the phase calibration parameters shown in Table 2 when the input signal is a power supply frequency of 53 Hz. A signal S A RG2 is the selected measurement range, and RG3 is the channel CH B signal S B (The measurement range selected by the operator). Note that the unshaded measurement range pairs in Table 3 meet the requirement that the ratio between the smaller and larger measurement ranges reaches 0.1, and the phase difference measurements shown in the boxes for such measurement range pairs are fairly accurate and can be used to evaluate the degree of phase calibration. The shaded measurement range pairs in Table 3 do not meet the requirement that the ratio between the smaller and larger measurement ranges reaches 0.1, and the measured phase difference values ​​may have too large an error, so they are listed in the table for reference. Table 3: Phase difference measured after writing phase calibration parameters at a power supply frequency of 53 Hz JPEG2025535615000004.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 differences measured after the vector voltage analyzer was written with the phase calibration parameters shown in Table 2 obtained by the method of the present invention are all quite small. Among the non-shaded measurement range sets, the absolute values ​​of the phase differences for the measurement range sets that only include measurement ranges above 100 mV are all within 2 μrad, and the absolute values ​​of the phase differences for the measurement range sets that only include measurement ranges below 100 mV are all within 10 μrad. Those skilled in the art will know that such phase difference values ​​are within a negligible range at the corresponding frequency and measurement range levels, and can therefore conclude that the vector voltage analyzer has been calibrated and the phase difference has returned to zero.

[0035] Table 4 below shows the phase difference (unit: μrad, RG1 is channel CH) measured after the vector voltage analyzer writes the phase calibration parameters shown in Table 2 when the input signal has an intermediate frequency of 1 kHz. A signal S A RG2 is the selected measurement range, and RG3 is the channel CH B signal S B(The measurement range selected by the method shown in Table 2 is the measurement range selected by the method shown in Table 2). Similarly, the unshaded measurement ranges in Table 4 meet the requirement that the ratio between the smaller and larger measurement ranges reaches 0.1, and can be used to evaluate the 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 differences measured after the vector voltage analyzer was written with the phase calibration parameters shown in Table 2 obtained by the method of the present invention are all quite small. Among the unshaded measurement ranges, the absolute values ​​of the phase differences for the measurement ranges containing only measurement ranges above 100 mV are all within 1 μrad, and the absolute values ​​of the phase differences for the measurement ranges containing only measurement ranges below 100 mV are all within 10 μrad. Those skilled in the art will recognize that these phase difference values ​​are within a negligible range at the corresponding frequency and measurement range levels, and can therefore determine that the vector voltage analyzer has been calibrated and the phase difference has returned to zero. Table 4: Measured phase difference after writing phase calibration parameters at an intermediate frequency of 1 kHz JPEG2025535615000005.jpg55152

[0036] Table 5 below shows the phase difference (unit: μrad, RG1 is channel CH) measured after the phase calibration parameters shown in Table 2 are written into the vector voltage analyzer when the input signal is a high frequency of 10 kHz. A signal S A RG2 is the selected measurement range, and RG3 is the channel CH B signal S B (measurement range selected in Table 5: Phase difference measured after writing phase calibration parameters at a high frequency of 10 kHz JPEG2025535615000006.jpg55152

[0037] Similarly, the unshaded measurement range pairs in Table 5 meet the requirement that the ratio between the smaller and larger measurement ranges reaches 0.1 and can be used to evaluate the 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 differences measured after the vector voltage analyzer was written with the phase calibration parameters shown in Table 2 obtained by the method of the present invention are all quite small. Among the unshaded measurement range pairs, the absolute values ​​of the phase differences for the measurement range pairs containing only measurement ranges above 100 mV are all within 10 μrad, and for the measurement range pairs containing only measurement ranges below 100 mV, the absolute values ​​of the phase differences are all within 50 μrad. Those skilled in the art will recognize that these phase difference values ​​are within a negligible range at the corresponding frequency and measurement range levels, and can therefore conclude that the vector voltage analyzer has been calibrated and the phase difference has returned to zero.

[0038] Therefore, the above experiments have shown that the zero phase calibration method of the present invention can be applied to effectively calibrate the phase zero points between different channel signals of a wide measurement range meter at various frequencies.

[0039] The following should be explained. The above examples are intended to illustrate the technical solutions of the present invention and are not intended to limit the same. Within the concept of the present invention, the technical features in the above examples or different examples may be combined, these steps may be implemented in any order, and there are many other variations in the above different aspects of the present invention, which will not be described in detail for the sake of clarity. Although the present invention has been described in detail with reference to the above examples, those skilled in the art should understand that it is still possible to modify the technical solutions described in each of the above examples or to equivalently replace some of the technical features thereof. These modifications or substitutions do not deviate from the essence of the corresponding technical solutions and the scope of the technical solutions of each of the embodiments of the present invention. Those skilled in the art may also make some modifications and improvements without departing from the concept of the present invention, which fall within the protection scope of the present invention.

[0040] Although the steps in the flowchart of FIG. 4 are shown sequentially as indicated by the arrows, it should be understood that the steps do not necessarily need to be performed sequentially as indicated by the arrows. Unless otherwise specified in this description, there is no strict order restriction on the execution of the steps, and they may be performed in other orders. Furthermore, at least some of the steps in FIG. 4 may include multiple sub-steps or multiple stages, and the execution of these sub-steps or stages may not necessarily be completed at the same time but may be performed at different times. Furthermore, the execution order of these sub-steps or stages may not necessarily be consecutive but may be performed in order or alternating with other steps or at least some of the sub-steps or stages of other steps.

[0041] The computing device includes a memory having computer-readable instructions stored therein and one or more processors, the one or more processors executing the computer-readable instructions resulting in: Step S1: selecting a pair of identical measurement ranges and a pair of adjacent measurement ranges consisting of a measurement range and a smaller measurement range adjacent to the measurement range between different channels A and B of the wide measurement range meter, and measuring phase calibration parameters between the channel signals of the pair of identical measurement ranges and the channel signals of the pair of adjacent measurement ranges; Step S2 of completing the measurement of the phase calibration parameters of all pairs of the same measurement range and pairs of adjacent measurement ranges and storing the measured phase calibration parameters in a memory; Step S3: Calling the measured phase calibration parameters stored in the memory and calculating the phase calibration parameters between the channel signals of each remaining set of measurement ranges of the wide measurement range meter step by step; Step S4: storing the phase calibration parameters calculated in step S3 in a memory; When calibrating the wide measurement range meter, step S5 is performed to call the corresponding phase calibration parameters stored in the memory and calibrate the phase zero points between different channel signals of the wide measurement range meter.

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

[0043] In some embodiments, step S1 includes outputting full-scale amplitude signals of adjacent smaller measurement ranges from a standard source to channel A and channel B of a wide measurement range meter, and outputting a pair of channel signals S of the same measurement range. A , S B Channel signal S between adjacent measurement range pairs A , S B Phase calibration parameters between 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 (n, n) is measured, where n is the number of levels in the measurement range of the wide measurement range meter, and i is an integer and 1≦i≦n−1.

[0044] In some embodiments, step S3 uses the 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 called up 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 (i, i+1) is adopted for PHS AS B Calculate (i+1, i) and use 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 adopted to 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 adopted to PHS A S B (j, j+2), where j is an integer and l≦j≦n−2, and similarly calculate the channel signals S for each remaining set of measurement ranges of the wide measurement range meter. A , S B The phase calibration parameters between the two points are calculated step by step.

[0045] In some embodiments, the ratio between the smaller measurement range and the larger measurement range in the set of adjacent measurement ranges of the wide measurement range meter is 0.4 or 0.5.

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

[0047] A computer-readable storage medium having computer-readable instructions stored thereon may be configured to cause one or more processors to execute the computer-readable instructions. Step S1: selecting a pair of identical measurement ranges and a pair of adjacent measurement ranges consisting of a measurement range and a smaller measurement range adjacent to the measurement range between different channels A and B of the wide measurement range meter, and measuring phase calibration parameters between the channel signals of the pair of identical measurement ranges and the channel signals of the pair of adjacent measurement ranges; Step S2 of completing the measurement of the phase calibration parameters of all pairs of the same measurement range and pairs of adjacent measurement ranges and storing the measured phase calibration parameters in a memory; Step S3: Calling the measured phase calibration parameters stored in the memory and calculating the phase calibration parameters between the channel signals of each remaining set of measurement ranges of the wide measurement range meter step by step; Step S4: storing the phase calibration parameters calculated in step S3 in a memory; When calibrating the wide measurement range meter, the corresponding phase calibration parameters stored in the memory are called up and step S5 is executed to calibrate the phase zero points between different channel signals of the wide measurement range meter.

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

[0049] In some embodiments, step S1 includes outputting full-scale amplitude signals of adjacent smaller measurement ranges from a standard source to channel A and channel B of a wide measurement range meter, and outputting a pair of channel signals S of the same measurement range. A , S B Channel signal S between adjacent measurement range pairs A , S B Phase calibration parameters between 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 (n, n) is measured, where n is the number of levels in the measurement range of the wide measurement range meter, and i is an integer and 1≦i≦n−1.

[0050] In some embodiments, step S3 uses the 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 called up 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 (i, i+1) is adopted for PHS A S B Calculate (i+1, i) and use 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 adopted to 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 adopted to PHS A S B(j, j+2), where j is an integer and l≦j≦n−2, and similarly calculate the channel signals S for each remaining set of measurement ranges of the wide measurement range meter. A , S B The phase calibration parameters between the two points are calculated step by step.

[0051] In some embodiments, the ratio between the smaller measurement range and the larger measurement range in the set of adjacent measurement ranges of the wide measurement range meter is 0.4 or 0.5.

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

[0053] Those skilled in the art will understand that implementing all or part of the steps in the method according to the above embodiments can be accomplished by instructing associated hardware with computer-readable instructions. When the computer-readable instructions are stored in a non-volatile computer-readable storage medium and executed, they can include the steps in the above method embodiments. Here, any reference to memory, storage, data library, or other medium employed in the embodiments provided herein 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 comes in various forms, such as, by way of illustration and not limitation, static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) 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 manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered that they are within the scope described in this specification.

[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 construed as limiting the patent scope of the invention. Those skilled in the art may make modifications and improvements without departing from the concept of the present invention, which are within the scope of protection of the present invention. Therefore, the patent scope of the present invention is subject to the scope of the appended claims.

Claims

1. A zero phase calibration method for calibrating a phase zero point between different channel signals of a wide measurement range meter, comprising: Step S1: selecting a set of identical measurement ranges and a set of adjacent measurement ranges consisting of the measurement range and a smaller measurement range adjacent to the measurement range between different channels A and B of the wide measurement range meter, and measuring phase calibration parameters between the channel signals of the set of identical measurement ranges and the channel signals of the set of adjacent measurement ranges; Step S2: completing the measurement of the phase calibration parameters of all pairs of the same measurement range and pairs of adjacent measurement ranges, and storing the measured phase calibration parameters in a memory; Step S3: calling the measured phase calibration parameters stored in the memory and calculating stepwise the phase calibration parameters between the channel signals of each remaining set of measurement ranges of the wide measurement range meter; Step S4: storing the phase calibration parameters calculated in step S3 in the memory; and (S5) calibrating the phase zero point between different channel signals of the wide measurement range meter by calling up the corresponding phase calibration parameters stored in the memory when calibrating the wide measurement range meter.

2. 2. The method of claim 1, wherein the ratio of the smaller measurement range to the larger measurement range in the set of adjacent measurement ranges of the wide measurement range meter is at least 0.

1.

3. In step S1, a full-scale amplitude signal of the adjacent smaller measurement range is output from a standard source to the channel A and the channel B of the wide measurement range meter, and a channel signal S of the same measurement range pair is output. Ａ , S Ｂ and the channel signal S of the adjacent measurement range set Ａ , S Ｂ Phase calibration parameters between 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 3. The method of claim 2, wherein (n, n) is measured, where n is the number of levels in the measurement range of the wide measurement range meter, and i is an integer and 1≦i≦n−1.

4. In step S3, 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), the measured phase calibration parameters stored in the memory are called up, 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 (i, i+1) is adopted for PHS Ａ S Ｂ (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 adopted 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 adopted for PHS Ａ S Ｂ (j, j+2), where j is an integer and l≦j≦n−2, and similarly thereafter, the channel signals S of the remaining measurement range pairs of the wide measurement range meter are calculated. Ａ , S Ｂ 4. The method according to claim 3, wherein the phase calibration parameters are calculated stepwise between the first and second phases.

5. 3. The method of claim 2, wherein the ratio of the smaller measurement range to the larger measurement range in the set of adjacent measurement ranges of the wide measurement range meter is 0.4 or 0.

5.

6. 6. The method of claim 5, wherein the channel signal is an AC voltage signal.

7. 6. The method of claim 5, wherein the channel signal is an alternating current signal.

8. 1. A computing device comprising: a memory having computer-readable instructions stored thereon; and one or more processors, wherein, when the one or more processors execute the computer-readable instructions: Step S1: selecting a set of identical measurement ranges and a set of adjacent measurement ranges consisting of the measurement range and a smaller measurement range adjacent to the measurement range between different channels A and B of the wide measurement range meter, and measuring phase calibration parameters between the channel signals of the set of identical measurement ranges and the channel signals of the set of adjacent measurement ranges; Step S2: completing the measurement of the phase calibration parameters of all pairs of the same measurement range and pairs of adjacent measurement ranges, and storing the measured phase calibration parameters in a memory; Step S3: calling the measured phase calibration parameters stored in the memory and calculating stepwise the phase calibration parameters between the channel signals of each remaining set of measurement ranges of the wide measurement range meter; Step S4: storing the phase calibration parameters calculated in step S3 in the memory; and a computer device that executes step S5 of calibrating the phase zero points between different channel signals of the wide measurement range meter by calling up the corresponding phase calibration parameters stored in the memory when calibrating the wide measurement range meter.

9. 9. The computing device of claim 8, wherein the ratio of the smaller measurement range to the larger measurement range in the set of adjacent measurement ranges of the wide measurement range meter is at least 0.

1.

10. In step S1, a full-scale amplitude signal of the adjacent smaller measurement range is output from a standard source to the channel A and the channel B of the wide measurement range meter, and a channel signal S of the same measurement range pair is output. Ａ , S Ｂ and the channel signal S of the adjacent measurement range set Ａ , S Ｂ Phase calibration parameters between 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 10. The computer device of claim 9, wherein n is the number of levels in the measurement range of the wide measurement range meter, and i is an integer and 1≦i≦n−1.

11. In step S3, 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), the measured phase calibration parameters stored in the memory are called up, 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 (i, i+1) is adopted for PHS Ａ S Ｂ (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 adopted 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 adopted for PHS Ａ S Ｂ (j, j+2), where j is an integer and l≦j≦n−2, and similarly thereafter, the channel signals S of the remaining measurement range pairs of the wide measurement range meter are calculated. Ａ , S Ｂ 11. The computer device of claim 10, wherein the phase calibration parameters are calculated stepwise between the first and second phases.

12. One or more non-volatile computer-readable storage media having computer-readable instructions stored thereon, the computer-readable instructions being operable by one or more processors when executed by the one or more processors. Step S1: selecting a set of identical measurement ranges and a set of adjacent measurement ranges consisting of the measurement range and a smaller measurement range adjacent to the measurement range between different channels A and B of the wide measurement range meter, and measuring phase calibration parameters between the channel signals of the set of identical measurement ranges and the channel signals of the set of adjacent measurement ranges; Step S2: completing the measurement of the phase calibration parameters of all pairs of the same measurement range and pairs of adjacent measurement ranges, and storing the measured phase calibration parameters in a memory; Step S3: calling the measured phase calibration parameters stored in the memory and calculating stepwise the phase calibration parameters between the channel signals of each remaining set of measurement ranges of the wide measurement range meter; Step S4: storing the phase calibration parameters calculated in step S3 in the memory; A non-volatile computer-readable storage medium that executes step S5 of calibrating the phase zero points between different channel signals of the wide measurement range meter by calling up corresponding phase calibration parameters stored in the memory when calibrating the wide measurement range meter.

13. 13. The storage medium of claim 12, wherein the ratio of the smaller measurement range to the larger measurement range in the set of adjacent measurement ranges of the wide measurement range meter is at least 0.

1.

14. In step S1, a full-scale amplitude signal of the adjacent smaller measurement range is output from a standard source to the channel A and the channel B of the wide measurement range meter, and a channel signal S of the same measurement range pair is output. Ａ , S Ｂ and the channel signal S of the adjacent measurement range set Ａ , S Ｂ Phase calibration parameters between 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 The storage medium according to claim 13, characterized in that (n, n) is measured, where n is the number of levels in the measurement range of the wide measurement range meter, and i is an integer and 1≦i≦n−1.

15. In step S3, 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), the measured phase calibration parameters stored in the memory are called up, 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 (i, i+1) is adopted for PHS Ａ S Ｂ (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 adopted 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 adopted for PHS Ａ S Ｂ (j, j+2), where j is an integer and l≦j≦n−2, and similarly thereafter, the channel signals S of the remaining measurement range pairs of the wide measurement range meter are calculated. Ａ , S Ｂ 15. The storage medium according to claim 14, wherein the phase calibration parameters are calculated stepwise between the first and second phases.

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