CN115436694A - Voltage measurement method, system, electronic device and non-volatile storage medium - Google Patents
Voltage measurement method, system, electronic device and non-volatile storage medium Download PDFInfo
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Abstract
The application discloses a voltage measuring method, a system, an electronic device and a nonvolatile storage medium. Wherein, the method comprises the following steps: acquiring an initial analog voltage signal for amplification to obtain an amplified analog voltage signal, wherein the initial voltage signal is a millivolt-level voltage signal; filtering the amplified analog voltage signal to obtain a target analog voltage signal; converting the target analog voltage signal into a target digital voltage signal; and analyzing and processing the target digital voltage signal to determine a voltage measurement result. The method and the device solve the technical problems that the small voltage signal is very weak and often can be submerged by noise or external interference signals, and the measurement difficulty is large and the precision is poor when the small voltage signal is measured.
Description
Technical Field
The present disclosure relates to the field of precision signal measurement technologies, and in particular, to a voltage measurement method, a system, an electronic device, and a non-volatile storage medium.
Background
With the rapid development of industrial automation and power electronic technology, various types of sensors have been developed, and the physical quantity to be measured is usually converted into an electrical signal in equal proportion and then connected to a sampling system for measurement, specifically, in a computer measurement system, some non-electrical signals such as pressure, temperature, acceleration and the like are often collected, and the measurement of such signals usually adopts a method that the sensors are used to convert the non-electrical signals into voltage or current signals, but because the output impedance of the sensors is high, the output voltage signals are often millivolt-level small voltage signals.
The current metering instrument can not directly complete the measurement and calibration of the voltage data with the precision level, and the small voltage signals are very weak and often submerged by noise or external interference signals, so that the data acquisition is difficult, the traditional detection means is difficult to meet the measurement requirement of high precision, and the technical problems of difficult measurement, poor precision and the like exist frequently.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides a voltage measurement method, a voltage measurement system, electronic equipment and a nonvolatile storage medium, so as to at least solve the technical problems of great measurement difficulty and poor precision in the small voltage signal measurement due to the fact that the small voltage signal is very weak and is often submerged by noise or external interference signals.
According to an aspect of an embodiment of the present application, there is provided a voltage measurement method including: acquiring an initial analog voltage signal for amplification to obtain an amplified analog voltage signal, wherein the initial voltage signal is a millivolt-level voltage signal; filtering the amplified analog voltage signal to obtain a target analog voltage signal; converting the target analog voltage signal into a target digital voltage signal; and analyzing and processing the target digital voltage signal to determine a voltage measurement result.
Optionally, acquiring the initial analog voltage signal to perform amplification processing, and obtaining the amplified analog voltage signal includes: determining the magnification; and amplifying the initial analog voltage signal according to the amplification factor to obtain an amplified analog voltage signal.
Optionally, determining the magnification comprises: determining a target voltage interval, wherein the target voltage interval is a voltage interval in which the amplified analog voltage signal is located; and determining the amplification factor according to the target voltage interval and the initial analog voltage signal.
Optionally, the filtering the amplified analog voltage signal to obtain a target analog voltage signal includes: and suppressing the alternating current signal in the amplified analog voltage signal and retaining the direct current signal through a multiphase filter network, wherein the multiphase filter network consists of a plurality of capacitors and resistors.
Optionally, converting the target analog voltage signal into the target digital voltage signal comprises: determining a sampling time interval; sampling the target analog voltage signal according to the sampling time interval to obtain sampling data; calculating the difference value between the sampling data and the standard digital signal data, and judging whether the preset voltage threshold is met; and under the condition that the preset voltage threshold is met, determining the sampling data as a target digital voltage signal.
Optionally, calculating a difference between the sampled data and the standard digital signal data, and determining whether the preset voltage threshold is met includes: acquiring a first voltage value in sampling data and a second voltage value in standard digital signal data at the same sampling moment; calculating the difference value between the first voltage value and the second voltage value and comparing the difference value with a preset voltage threshold value; and under the condition that the difference value is not larger than the preset voltage threshold value, judging that the difference value meets the preset voltage threshold value.
According to another aspect of the embodiments of the present application, there is also provided a voltage measurement system including: the voltage measuring system comprises an amplifying circuit, a filter circuit, an analog-to-digital converter, a processing circuit and a shielding box, wherein the amplifying circuit is used for amplifying an initial analog voltage signal at an input end to obtain an amplified analog voltage signal; the filter circuit is used for filtering alternating current signals in the amplified analog voltage signals to obtain target analog voltage signals; the analog-to-digital converter is used for converting the target analog voltage signal into a target digital voltage signal; the processing circuit is used for analyzing and processing the target digital voltage signal to obtain a voltage measurement result; the shielding box surrounds the amplifying circuit, the filtering circuit and the analog-digital converter in the box inner space and is used for shielding external interference signals.
Optionally, the shielding box is made of a metal material, and a housing of the shielding box is grounded to eliminate an influence of external electromagnetic interference on the measurement circuit.
According to still another aspect of an embodiment of the present application, there is also provided a voltage measurement apparatus including: the signal amplification module is used for acquiring an initial analog voltage signal and amplifying the initial analog voltage signal to obtain an amplified analog voltage signal, wherein the initial voltage signal is a millivolt-level voltage signal; the signal filtering module is used for filtering the amplified analog voltage signal to obtain a target analog voltage signal; the signal conversion module is used for converting the target analog voltage signal into a target digital voltage signal; and the signal analysis module is used for analyzing and processing the target digital voltage signal and determining a voltage measurement result.
According to still another aspect of the embodiments of the present application, there is provided an electronic device, including a processor, configured to execute a program, where the program executes to perform the voltage measurement method.
According to still another aspect of the embodiments of the present application, there is also provided a nonvolatile storage medium including a stored program, wherein a device in which the nonvolatile storage medium is controlled to execute the voltage measurement method when the program is executed.
In the embodiment of the application, an initial analog voltage signal is collected and amplified to obtain an amplified analog voltage signal, wherein the initial voltage signal is a millivolt-level voltage signal; filtering the amplified analog voltage signal to obtain a target analog voltage signal; converting the target analog voltage signal into a target digital voltage signal; the method for analyzing and processing the target digital voltage signal and determining the voltage measurement result achieves the purpose of realizing high-stability and high-precision measurement on the millivolt-level small voltage signal by carrying out a series of processing operations such as amplification, filtering and conversion on the acquired millivolt-level small voltage signal, and further solves the technical problems of difficult measurement and poor precision in the small voltage signal measurement caused by the fact that the small voltage signal is very weak and often submerged by noise or external interference signals.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a method flow of voltage measurement according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a voltage measurement system according to an embodiment of the present invention;
FIG. 3 is a circuit connection diagram of a voltage measurement circuit provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a voltage measuring device according to an embodiment of the present invention;
fig. 5 is a block diagram of a hardware structure of a computer terminal (or an electronic device) for implementing a method for voltage measurement according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
To facilitate better understanding of the embodiments of the present application for those skilled in the art, some technical terms or terms referred to in the embodiments of the present application are explained as follows:
RC circuit (resistor-capacitor circuit): or RC filter, RC network, also called phase shift circuit, is a circuit that includes a resistor driven by a voltage source and a current source, and a capacitor. One of the simplest RC circuits is composed of a capacitor and a resistor, and is called a first-order RC circuit.
Integrated Operational Amplifier (Integrated Operational Amplifier): the integrated operational amplifier is a high-gain analog integrated circuit composed of multi-stage direct coupling amplifying circuits.
Signal-to-Noise Ratio (Signal-Noise Ratio, SNR): refers to the ratio of signal to noise in an electronic device or system. The signal refers to an electronic signal from the outside of the device to be processed by the device, and the noise refers to an original signal generated after passing through the device, wherein irregular extra signals (or information) do not exist in the original signal, and the signal does not change along with the change of the original signal.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present application, there is provided a method embodiment of voltage measurement, it should be noted that the steps illustrated in the flowchart of the figure may be performed in a computer system, such as a set of computer-executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a schematic diagram of a flow of a method for measuring voltage according to an embodiment of the present application, where the method includes the following steps, as shown in fig. 1:
step S102, acquiring an initial analog voltage signal for amplification to obtain an amplified analog voltage signal, wherein the initial voltage signal is a millivolt-level voltage signal;
in some embodiments of the present application, acquiring the initial analog voltage signal for amplification, and obtaining the amplified analog voltage signal includes: determining the magnification; and amplifying the initial analog voltage signal according to the amplification factor to obtain an amplified analog voltage signal.
In the present embodiment, the initial analog voltage signal is amplified by the amplifier chip, and the adjustable range of the amplification factor is 0.125 times to 176 times.
In some embodiments of the present application, determining the magnification factor comprises: determining a target voltage interval, wherein the target voltage interval is a voltage interval in which the amplified analog voltage signal is positioned; and determining the amplification factor according to the target voltage interval and the initial analog voltage signal.
Specifically, the setting of the amplification factor is realized by changing different configurations of pins of the amplifier chip.
Step S104, filtering the amplified analog voltage signal to obtain a target analog voltage signal;
in some embodiments of the present application, the filtering the amplified analog voltage signal to obtain the target analog voltage signal includes: and suppressing the alternating current signal in the amplified analog voltage signal and retaining the direct current signal through a multiphase filter network, wherein the multiphase filter network consists of a plurality of capacitors and resistors.
In this embodiment, the polyphase filter network is an RC network.
Step S106, converting the target analog voltage signal into a target digital voltage signal;
in some embodiments of the present application, converting the target analog voltage signal to the target digital voltage signal comprises: determining a sampling time interval; sampling the target analog voltage signal according to the sampling time interval to obtain sampling data; calculating the difference value between the sampling data and the standard digital signal data, and judging whether the preset voltage threshold is met; and under the condition that the preset voltage threshold is met, determining the sampling data as a target digital voltage signal.
Specifically, the analog signal (i.e., the target analog voltage signal) having continuous time and continuous amplitude is converted into a digital signal (i.e., the target digital voltage signal) having discrete time and discrete amplitude through sampling, holding, quantization and encoding.
In some embodiments of the present application, calculating a difference between the sampled data and the standard digital signal data, and determining whether the preset voltage threshold is met includes: acquiring a first voltage value in sampling data and a second voltage value in standard digital signal data at the same sampling moment; calculating the difference value between the first voltage value and the second voltage value and comparing the difference value with a preset voltage threshold value; and under the condition that the difference value is not larger than the preset voltage threshold value, judging that the difference value meets the preset voltage threshold value.
Specifically, an input analog signal is sampled at prescribed time intervals and compared with a series of standard digital signals (i.e., the above-mentioned standard digital signal data).
And step S108, analyzing and processing the target digital voltage signal and determining a voltage measurement result.
In this embodiment, the CPU processor further analyzes the target digital voltage signal, and displays the waveform of the acquired voltage signal.
Through the steps, a series of processing operations such as amplification, filtering and conversion are carried out on the acquired millivolt-level small voltage signal, the purpose of high-stability and high-precision measurement of the millivolt-level small voltage signal is achieved, and the technical problems that the small voltage signal is very weak and is often submerged by noise or external interference signals, so that the measurement difficulty is large and the precision is poor when the small voltage signal is measured are solved.
Example 2
According to the embodiment of the invention, the embodiment of the voltage measuring system is also provided. Fig. 2 is a schematic structural diagram of a voltage measurement system according to an embodiment of the present invention. As shown in fig. 2, the system includes: the voltage measurement system includes an amplification circuit 20, a filter circuit 22, an analog-to-digital converter 24, a processing circuit 26, and a shield can 28, wherein,
the amplifying circuit 20 is configured to amplify the initial analog voltage signal at the input end to obtain an amplified analog voltage signal;
the filter circuit 22 is configured to filter an alternating current signal in the amplified analog voltage signal to obtain a target analog voltage signal;
an analog-to-digital converter 24 for converting the target analog voltage signal into a target digital voltage signal;
the processing circuit 26 is used for analyzing and processing the target digital voltage signal to obtain a voltage measurement result;
the shielding box 28 encloses the amplifying circuit 20, the filter circuit 22 and the analog-to-digital converter 24 in a box inner space for shielding external interference signals.
In some embodiments of the present application, the shielding box 28 is made of a metal material, and a housing of the shielding box is grounded to eliminate an influence of external electromagnetic interference on the measurement circuit.
In this embodiment, the shield case is a metal body that is made of a conductive or magnetic conductive material and has various shapes such as a case, a plate, and a sleeve, and that limits electromagnetic performance within a certain spatial range and suppresses radiation interference.
To further describe the voltage measurement system, fig. 3 is a circuit connection diagram of a voltage measurement circuit according to an embodiment of the present invention, as shown in fig. 3, the circuit includes: the amplifier comprises an amplifying circuit, a filter circuit, an analog-to-digital converter, a processing circuit and a shielding box, specifically, an amplifier chip selected by the circuit can realize amplifying effects of different multiples through different configurations of pins, and has the characteristics of low power consumption, high common mode rejection ratio, high conversion rate and small gain error; the matched filter circuit design can reduce the alternating current component in the pulsating direct current voltage as much as possible so as to ensure the measurement accuracy.
Specifically, for the amplification of a tiny signal (mV level), noise interference needs to be avoided as much as possible, and devices with low power consumption, high common mode rejection ratio, high slew rate and small gain error need to be selected for the type selection of the amplifier. In this embodiment, the adjustable range of the amplification factor of the amplifier chip selected by the amplifying circuit part is 0.125 times to 176 times, and the setting of the amplification factor can be realized by different configurations of the pins.
The filter circuit is designed to reduce alternating current components in pulsating direct current voltage as much as possible and retain the direct current components, so that the ripple coefficient of the measured signal voltage is reduced, and the waveform becomes smoother. In this embodiment, an active filter circuit is employed.
Specifically, the active filter circuit generally includes an RC network and an integrated operational amplifier, where the selection of the integrated operational amplifier has strict requirements, and in this embodiment, the low-frequency noise of the integrated operational amplifier circuit is very low, and the power is supplied by a dc power supply circuit.
In this embodiment, the analog-to-digital converter can convert the analog signal into a digital signal, and convert the analog signal with continuous time and continuous amplitude into a digital signal with discrete time and discrete amplitude through sampling, holding, quantizing and encoding.
Specifically, an input analog signal is sampled at prescribed time intervals and compared with a series of standard digital signals.
In the embodiment, the main advantages of conversion to digital signal transmission are strong interference resistance and no noise accumulation. In analog communication, in order to improve the signal-to-noise ratio, even if the attenuated transmission signal is amplified during signal transmission, noise inevitably superimposed on the signal during transmission is simultaneously amplified, and as the transmission distance increases, the more noise is accumulated, so that the transmission quality is seriously deteriorated. However, the amplitude of the digital signal is a finite number of discrete values, and although noise interference is received in the transmission process, when the signal-to-noise ratio is deteriorated to a certain extent, namely, a method of decision regeneration is adopted at a proper distance, the digital signal which has no noise interference and is the same as the original transmitting end is regenerated, so that long-distance high-quality transmission can be realized.
The shielding box is a metal body which limits electromagnetic capability within a certain space range and is used for inhibiting radiation interference by utilizing shielding bodies in various shapes such as shells, plates, sleeves and the like made of conductive or magnetic conductive materials, and the shielding box also processes conduction and radiation to realize interference-free testing environment for tested wireless communication equipment. In this embodiment, a shielding box is designed, which is made of a metal material, and the housing of the shielding box is grounded, so that the electromagnetic energy radiated inside the device can be limited from going out of a certain area, i.e. the internal interference signal is absorbed, and the external electromagnetic energy radiated outside can be prevented from entering a certain area, i.e. the external interference signal is shielded.
The small-signal amplification measuring circuit provided by the embodiment of the application is composed of an amplifying circuit, a filter circuit, an analog-to-digital converter, a CPU (central processing unit) processing system (namely the processing circuit) and a shielding box, so that the requirements of high stability and high linearity of voltage signal measurement are met. The system can accurately measure 1-50 mV tiny voltage, the precision can reach 0.01% level, and the circuit also has the characteristics of common mode interference suppression, temperature drift suppression, good stability, strong anti-interference performance and the like.
Example 3
According to the embodiment of the invention, the embodiment of the voltage measuring device is also provided. Fig. 4 is a schematic structural diagram of a voltage measuring apparatus according to an embodiment of the present invention. As shown in fig. 4, the apparatus includes:
the signal amplification module 40 is configured to collect an initial analog voltage signal and amplify the initial analog voltage signal to obtain an amplified analog voltage signal, where the initial voltage signal is a millivolt-level voltage signal;
the signal filtering module 42 is configured to perform filtering processing on the amplified analog voltage signal to obtain a target analog voltage signal;
a signal conversion module 44, configured to convert the target analog voltage signal into a target digital voltage signal;
and a signal analysis module 46 for analyzing the processed target digital voltage signal and determining a voltage measurement result.
It should be noted that the voltage measurement apparatus provided in this embodiment may be used to perform the voltage measurement method shown in fig. 1, and therefore, the explanation of the voltage measurement method is also applicable to the embodiment of the present application, and is not repeated herein.
According to an embodiment of the present invention, there is also provided an embodiment of a computer terminal for implementing the method of voltage measurement. Fig. 5 is a block diagram of a hardware structure of a computer terminal (or an electronic device) for implementing a method for voltage measurement according to an embodiment of the present invention. As shown in fig. 5, the computer terminal 50 (or electronic device 50) may include one or more (shown as 502a, 502b, \8230; 502 n) processors (which may include, but are not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 504 for storing data, and a transmission module 506 for communication functions. Besides, the method can also comprise the following steps: a display, an input/output interface (I/O interface), a Universal Serial Bus (USB) port (which may be included as one of the ports of the I/O interface), a network interface, a power source, and/or a camera. It will be understood by those skilled in the art that the structure shown in fig. 5 is only an illustration and is not intended to limit the structure of the electronic device. For example, computer terminal 50 may also include more or fewer components than shown in FIG. 5, or have a different configuration than shown in FIG. 5.
It should be noted that the one or more processors and/or other data processing circuitry described above may be referred to generally herein as "data processing circuitry". The data processing circuitry may be embodied in whole or in part in software, hardware, firmware, or any combination thereof. Further, the data processing circuit may be a single stand-alone processing module, or incorporated, in whole or in part, into any of the other elements in the computer terminal 50 (or electronic device). As referred to in the embodiments of the application, the data processing circuit acts as a processor control (e.g. selection of a variable resistance termination path connected to the interface).
The memory 504 can be used for storing software programs and modules of application software, such as program instructions/data storage devices corresponding to the voltage measurement method in the embodiment of the present application, and the processor executes various functional applications and data processing by running the software programs and modules stored in the memory 504, that is, implementing the voltage measurement method described above. The memory 504 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 504 may further include memory located remotely from the processor, which may be connected to the computer terminal 50 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission module 506 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the computer terminal 50. In one example, the transmission device 506 includes a Network adapter (NIC) that can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 506 may be a Radio Frequency (RF) module, which is used to communicate with the internet in a wireless manner.
The display may be, for example, a touch screen type Liquid Crystal Display (LCD) that may enable a user to interact with a user interface of the computer terminal 50 (or electronic device).
It should be noted that, in some alternative embodiments, the computer device (or electronic device) shown in fig. 5 may include hardware elements (including circuitry), software elements (including computer code stored on a computer-readable medium), or a combination of both hardware and software elements. It should be noted that fig. 5 is only one example of a particular specific example and is intended to illustrate the types of components that may be present in the computer device (or electronic device) described above.
It should be noted that the electronic device for voltage measurement shown in fig. 5 is used for executing the method for voltage measurement shown in fig. 1, and therefore the explanation in the above method for voltage measurement is also applicable to the electronic device for voltage measurement, and is not repeated here.
According to an embodiment of the present application, there is also provided an embodiment of a non-volatile storage medium, where the non-volatile storage medium includes a stored program, and the program is configured to control a device in which the non-volatile storage medium is located to perform the following voltage measurement method when the program runs: acquiring an initial analog voltage signal for amplification processing to obtain an amplified analog voltage signal, wherein the initial voltage signal is a millivolt voltage signal; filtering the amplified analog voltage signal to obtain a target analog voltage signal; converting the target analog voltage signal into a target digital voltage signal; and analyzing and processing the target digital voltage signal to determine a voltage measurement result.
The above-mentioned serial numbers of the embodiments of the present application are merely for description, and do not represent the advantages and disadvantages of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, units or modules, and may be electrical or in other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, or portions or all or portions of the technical solutions that contribute to the prior art, may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (11)
1. A voltage measurement method, comprising:
acquiring an initial analog voltage signal for amplification processing to obtain an amplified analog voltage signal, wherein the initial voltage signal is a millivolt voltage signal;
filtering the amplified analog voltage signal to obtain a target analog voltage signal;
converting the target analog voltage signal into a target digital voltage signal;
and analyzing and processing the target digital voltage signal to determine a voltage measurement result.
2. The voltage measurement method of claim 1, wherein collecting the initial analog voltage signal for amplification to obtain an amplified analog voltage signal comprises:
determining the amplification factor;
and amplifying the initial analog voltage signal according to the amplification factor to obtain the amplified analog voltage signal.
3. The voltage measurement method of claim 2, wherein determining the amplification factor comprises:
determining a target voltage interval, wherein the target voltage interval is a voltage interval in which the amplified analog voltage signal is located;
and determining the amplification factor according to the target voltage interval and the initial analog voltage signal.
4. The voltage measurement method of claim 1, wherein filtering the amplified analog voltage signal to obtain a target analog voltage signal comprises:
and suppressing an alternating current signal in the amplified analog voltage signal and retaining a direct current signal through a multiphase filter network, wherein the multiphase filter network is composed of a plurality of capacitors and resistors.
5. The voltage measurement method of claim 1, wherein converting the target analog voltage signal to a target digital voltage signal comprises:
determining a sampling time interval;
sampling the target analog voltage signal according to the sampling time interval to obtain sampling data;
calculating the difference value between the sampling data and the standard digital signal data, and judging whether the preset voltage threshold is met;
and under the condition that the preset voltage threshold value is met, determining the sampling data as the target digital voltage signal.
6. The voltage measurement method of claim 5, wherein calculating the difference between the sampled data and standard digital signal data and determining whether a predetermined voltage threshold is met comprises:
acquiring a first voltage value in the sampling data and a second voltage value in the standard digital signal data at the same sampling moment;
calculating the difference value between the first voltage value and the second voltage value and comparing the difference value with the preset voltage threshold value;
and under the condition that the difference value is not larger than the preset voltage threshold value, judging that the difference value meets the preset voltage threshold value.
7. A voltage measurement system, comprising: the voltage measuring system comprises an amplifying circuit, a filtering circuit, an analog-to-digital converter, a processing circuit and a shielding box, wherein,
the amplifying circuit is used for amplifying the initial analog voltage signal at the input end to obtain an amplified analog voltage signal;
the filter circuit is used for filtering alternating current signals in the amplified analog voltage signals to obtain target analog voltage signals;
the analog-to-digital converter is used for converting the target analog voltage signal into a target digital voltage signal;
the processing circuit is used for analyzing and processing the target digital voltage signal to obtain a voltage measurement result;
the shielding box surrounds the amplifying circuit, the filtering circuit and the analog-to-digital converter in a box inner space and is used for shielding external interference signals.
8. The voltage measurement system of claim 7, wherein the shielding box is made of a metal material, and a housing of the shielding box is grounded for eliminating an influence of external electromagnetic interference on the measurement circuit.
9. A voltage measurement device, comprising:
the signal amplification module is used for acquiring an initial analog voltage signal for amplification processing to obtain an amplified analog voltage signal, wherein the initial voltage signal is a millivolt-level voltage signal;
the signal filtering module is used for filtering the amplified analog voltage signal to obtain a target analog voltage signal;
the signal conversion module is used for converting the target analog voltage signal into a target digital voltage signal;
and the signal analysis module is used for analyzing and processing the target digital voltage signal and determining a voltage measurement result.
10. An electronic device comprising a processor, wherein the processor is configured to run a program, wherein the program is configured to perform the voltage measurement method of any one of claims 1 to 6 when the program is run.
11. A non-volatile storage medium, comprising a stored program, wherein a device in which the non-volatile storage medium is located is controlled to perform the voltage measurement method of any one of claims 1 to 6 when the program is run.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117434337A (en) * | 2023-07-17 | 2024-01-23 | 国网安徽省电力有限公司营销服务中心 | Broadband voltage signal measurement method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117434337A (en) * | 2023-07-17 | 2024-01-23 | 国网安徽省电力有限公司营销服务中心 | Broadband voltage signal measurement method and system |
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