Anti-blocking circuit and anti-blocking method in strong electromagnetic environment

Abstract

The invention relates to an anti-blocking circuit and an anti-blocking method in a strong electromagnetic environment. Relates to the field of power measurement. The anti-blocking circuit in the strong electromagnetic environment comprises an electric signal monitoring module and an amplifying circuit module which are electrically connected. The electric signal monitoring module comprises an electric signal receiving module and an electric signal identification module; the amplifying circuit module comprises at least two groups of sub-amplifying circuits which are connected in parallel; the electric signal receiving module is used for outputting a to-be-adjusted electric signal to the electric signal identification module based on the electromagnetic field intensity in the strong electromagnetic environment, and the electric signal identification module is used for identifying the signal value level of the to-be-adjusted electric signal so as to adjust the to-be-adjusted electric signal based on the preset incidence relation between the signal value level and the signal value gear of the sub-amplification circuit. And a sub-amplification circuit of a corresponding signal value gear in the switching amplification circuit module is controlled to receive and process the to-be-adjusted electric signal, so that the amplification circuit module is prevented from being blocked. By adopting the method, the electromagnetic interference processing efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric power measurement, and in particular to an anti-blocking circuit and an anti-blocking method in a strong electromagnetic environment. Background Art

[0002] Most modern electronic devices include preamplifier circuits. The applicant has found that in areas where a large number of electrical devices are used, there are often more and stronger electromagnetic interference or electromagnetic radiation, and a strong electromagnetic environment will interfere with the normal operation of electrical equipment, causing signal distortion, equipment failure or data loss, and a harsh electromagnetic environment will also block key signals, such as causing saturation of the preamplifier circuit, which in turn leads to signal blocking problems during the transmission of the signal through the preamplifier circuit. Signal blocking problems may cause serious consequences, such as electrical equipment being unable to operate normally or being damaged. Therefore, research on circuit signal anti-blocking technology for preamplifier circuits has become a problem to be solved.

[0003] In the related art, circuit blocking is usually prevented by shielding electromagnetic interference or filtering electromagnetic interference with filters. However, shielding electromagnetic interference will increase manufacturing costs, increase the weight of electrical equipment, and some electromagnetic interference is not easy to be shielded; while filtering electromagnetic interference with filters will cause signal delays and affect the normal operation of the equipment. Therefore, there is still a problem of low efficiency in electromagnetic interference processing. Summary of the invention

[0004] Based on this, it is necessary to provide an anti-blocking circuit and anti-blocking method in a strong electromagnetic environment to address the above-mentioned technical problem of low efficiency in electromagnetic interference processing.

[0005] In a first aspect, the present application provides an anti-blocking circuit in a strong electromagnetic environment, comprising an electrical signal monitoring module and an amplifying circuit module connected;

[0006] The electric signal monitoring module includes an electric signal receiving module and an electric signal identification module, and the amplifying circuit module includes at least two groups of sub-amplifying circuits connected in parallel; each of the sub-amplifying circuits outputs an electric signal with a different signal value level;

[0007] The electrical signal receiving module is used to output the electrical signal to be adjusted to the electrical signal identification module based on the electromagnetic field strength in the strong electromagnetic environment. The electrical signal identification module is used to identify the signal value level of the electrical signal to be adjusted, so as to control the sub-amplifier circuit that switches the corresponding signal value gear in the amplification circuit module to receive and process the electrical signal to be adjusted based on the preset association relationship between the signal value level and the signal value gear of the sub-amplifier circuit, so as to avoid blocking of the amplification circuit module.

[0008] In one of the embodiments, the electrical signal receiving module is used to output the current signal to be adjusted to the electrical signal identification module, and the electrical signal identification module is used to identify the signal value level of the current signal to be adjusted; and the electrical signal identification module is used to convert the current signal to be adjusted into a voltage signal to be adjusted and then transmit it to the amplification circuit module.

[0009] In one embodiment, the sub-amplifier circuit includes a first resistor, a second resistor, a first capacitor, a second capacitor and an operational amplifier; the first capacitor, the first resistor and the second resistor are connected in series in sequence, the second capacitor is connected in parallel with the second resistor, and the other end of the first capacitor is grounded; the first pin of the operational amplifier is electrically connected to the first node where the first resistor and the second resistor are connected, the second pin of the operational amplifier is electrically connected to the output end of the electrical signal identification module, the third pin of the operational amplifier is electrically connected to the second node where the second resistor and the second capacitor are connected, and the third pin is the signal output end of the sub-amplifier circuit; the fourth pin of the operational amplifier is electrically connected to the fourth pin of the operational amplifier in other sub-amplifier circuits, and the fifth pin of the operational amplifier is electrically connected to the fifth pin of the operational amplifier in other sub-amplifier circuits.

[0010] In one embodiment, the amplifier circuit module includes a first sub-amplifier circuit, a second sub-amplifier circuit, a third sub-amplifier circuit and a fourth sub-amplifier circuit connected in parallel; the signal value gear of the first sub-amplifier circuit is a kiloampere gear, the signal value gear of the second sub-amplifier circuit is an ampere gear, the signal value gear of the third sub-amplifier circuit is a milliampere gear, and the signal value gear of the fourth sub-amplifier circuit is a microampere gear.

[0011] In one embodiment, the resistance value of the first resistor in the kiloampere amplifier circuit is 100-120 kiloohms, the resistance value of the first resistor in the ampere amplifier circuit is 48-55 kiloohms, the resistance value of the first resistor in the milliampere amplifier circuit is 18-24 kiloohms, and the resistance value of the first resistor in the microampere amplifier circuit is 4.5-5.5 kiloohms.

[0012] In a second aspect, the present application further provides an anti-blocking method in a strong electromagnetic environment, which is applied to the anti-blocking circuit described in any of the above embodiments; the anti-blocking circuit includes an electrically connected electrical signal monitoring module and an amplifying circuit module;

[0013] The electric signal monitoring module includes an electric signal receiving module and an electric signal identification module, and the amplifying circuit module includes at least two groups of sub-amplifying circuits connected in parallel; each of the sub-amplifying circuits outputs an electric signal with a different signal value level;

[0014] The method comprises:

[0015] When the electrical signal identification module receives the electrical signal to be adjusted output by the electrical signal receiving module, the signal value level of the electrical signal to be adjusted is identified, and based on the preset association relationship between the signal value level and the signal value gear of the sub-amplifier circuit, the sub-amplifier circuit of the corresponding signal value gear in the amplifier circuit module is controlled to receive and process the electrical signal to be adjusted, so as to avoid blocking of the amplifier circuit module; wherein the electrical signal receiving module is used to output the electrical signal to be adjusted to the electrical signal identification module based on the electromagnetic field strength in the strong electromagnetic environment.

[0016] In one of the embodiments, the electrical signal receiving module is used to output the current signal to be adjusted to the electrical signal identification module; when the electrical signal identification module receives the electrical signal to be adjusted output by the electrical signal receiving module, identifying the signal value level of the electrical signal to be adjusted includes: when the electrical signal identification module receives the current signal to be adjusted output by the electrical signal receiving module, identifying the signal value level of the current signal to be adjusted.

[0017] In one of the embodiments, the method further includes: the electrical signal identification module is used to convert the current signal to be adjusted into a voltage signal to be adjusted, and transmit the voltage signal to be adjusted to the amplification circuit module.

[0018] In one embodiment, the sub-amplifier circuit includes a first resistor, a second resistor, a first capacitor, a second capacitor and an operational amplifier; the first capacitor, the first resistor and the second resistor are connected in series in sequence, the second capacitor is connected in parallel with the second resistor, and the other end of the first capacitor is grounded; the first pin of the operational amplifier is electrically connected to the first node where the first resistor and the second resistor are connected, the second pin of the operational amplifier is electrically connected to the output end of the electrical signal identification module, the third pin of the operational amplifier is electrically connected to the second node where the second resistor and the second capacitor are connected, and the third pin is the signal output end of the sub-amplifier circuit; the fourth pin of the operational amplifier is electrically connected to the fourth pin of the operational amplifier in other sub-amplifier circuits, and the fifth pin of the operational amplifier is electrically connected to the fifth pin of the operational amplifier in other sub-amplifier circuits.

[0019] In one embodiment, the amplifier circuit module includes a first sub-amplifier circuit, a second sub-amplifier circuit, a third sub-amplifier circuit and a fourth sub-amplifier circuit connected in parallel; the signal value gear of the first sub-amplifier circuit is a kiloampere gear, the signal value gear of the second sub-amplifier circuit is an ampere gear, the signal value gear of the third sub-amplifier circuit is a milliampere gear, and the signal value gear of the fourth sub-amplifier circuit is a microampere gear.

[0020] The anti-blocking circuit in the strong electromagnetic environment includes an electrically connected electric signal monitoring module and an amplifying circuit module; the electric signal monitoring module includes an electric signal receiving module and an electric signal identification module, and the amplifying circuit module includes at least two groups of sub-amplifying circuits connected in parallel; each sub-amplifying circuit outputs an electric signal with a different signal value level; first, the electric signal receiving module outputs the electric signal to be adjusted to the electric signal identification module based on the electromagnetic field strength in the strong electromagnetic environment, and then the electric signal identification module identifies the signal value level of the electric signal to be adjusted, and based on the preset association between the signal value level and the signal value level of the sub-amplifying circuit, controls the sub-amplifying circuit of the corresponding signal value level in the switching amplifying circuit module to receive and process the electric signal to be adjusted, so as to avoid blocking of the amplifying circuit module. The above circuit manages and optimizes the electric signal processing by selecting a suitable amplifying circuit level through the synergy between the modules, avoiding blocking or malfunction of the amplifying circuit caused by excessively strong or weak electric signals, and can ensure the smoothness and stability of the processed signal. Especially in a strong electromagnetic environment, reasonable electric signal amplification and adjustment can prevent the performance degradation of the amplifying circuit due to electric signal fluctuations, which is equivalent to improving the efficiency of electromagnetic interference processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a schematic diagram of an anti-blocking circuit in a strong electromagnetic environment in one embodiment;

[0023] Figure 2 A schematic diagram of input and output signals of the microampere range in another embodiment;

[0024] Figure 3 A schematic diagram of mA input and output signals in one embodiment;

[0025] Figure 4 A schematic diagram of input and output signals of the ampere range in one embodiment;

[0026] Figure 5 Schematic diagram of input and output signals in the kiloampere range in one embodiment. DETAILED DESCRIPTION

[0027] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0029] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0030] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0031] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0032] like Figure 1As shown, an anti-blocking circuit in a strong electromagnetic environment is provided, including an electrically connected electric signal monitoring module and an amplifying circuit module; the electric signal monitoring module includes an electric signal receiving module and an electric signal identification module, and the amplifying circuit module includes at least two groups of sub-amplifying circuits connected in parallel; the signal value gears of the electric signals output by each sub-amplifying circuit are different; the electric signal receiving module is used to output the electric signal to be adjusted to the electric signal identification module based on the electromagnetic field strength in the strong electromagnetic environment, and the electric signal identification module is used to identify the signal value level of the electric signal to be adjusted, so as to control the sub-amplifying circuit of the corresponding signal value gear in the switching amplifying circuit module to receive and process the electric signal to be adjusted based on the preset association relationship between the signal value level and the signal value gear of the sub-amplifying circuit, so as to avoid blocking of the amplifying circuit module.

[0033] Among them, the electrical signal monitoring module can be used to receive and identify electrical signals, wherein the electrical signal receiving module included therein is used to receive electrical signals in the external environment, especially in a strong electromagnetic environment, and transmits the received electrical signals to subsequent modules for processing through corresponding sensors, while the electrical signal identification module is used to analyze the received electrical signals, for example, it can identify the strength of the received electrical signals; the amplification circuit module is used to enhance the strength of the electrical signals, and can be composed of multiple groups of sub-amplification circuits, and the multiple groups of sub-amplification circuits are connected in parallel to process the received signals simultaneously; the sub-amplification circuit represents the basic unit of the amplification circuit, and each sub-amplification circuit has a different signal value gear; the signal value gear refers to the specific electrical signal strength range that the sub-amplification circuit can process; the preset association relationship represents a predetermined rule or logical relationship.

[0034] As an example, the preset association relationship may indicate that the anti-blocking circuit may select a sub-amplifier circuit of appropriate gear according to the signal level output by the electrical signal recognition module; correspondingly, the control switching may refer to switching the sub-amplifier circuit suitable for the current signal level through the recognition result of the electrical signal recognition module.

[0035] The anti-blocking circuit in the strong electromagnetic environment includes an electrically connected electric signal monitoring module and an amplifying circuit module; the electric signal monitoring module includes an electric signal receiving module and an electric signal identification module, and the amplifying circuit module includes at least two groups of sub-amplifying circuits connected in parallel; each sub-amplifying circuit outputs an electric signal with a different signal value level; first, the electric signal receiving module outputs the electric signal to be adjusted to the electric signal identification module based on the electromagnetic field strength in the strong electromagnetic environment, and then the electric signal identification module identifies the signal value level of the electric signal to be adjusted, and based on the preset association between the signal value level and the signal value level of the sub-amplifying circuit, controls the sub-amplifying circuit of the corresponding signal value level in the switching amplifying circuit module to receive and process the electric signal to be adjusted, so as to avoid blocking of the amplifying circuit module. The above circuit manages and optimizes the electric signal processing by selecting a suitable amplifying circuit level through the synergy between the modules, avoiding blocking or malfunction of the amplifying circuit caused by excessively strong or weak electric signals, and can ensure the smoothness and stability of the processed signal. Especially in a strong electromagnetic environment, reasonable electric signal amplification and adjustment can prevent the performance degradation of the amplifying circuit due to electric signal fluctuations, which is equivalent to improving the efficiency of electromagnetic interference processing.

[0036] In an exemplary embodiment, Figure 1 As shown, the anti-blocking circuit 10 in a strong electromagnetic environment includes an electrical signal monitoring module 11 and an amplifying circuit module 12, wherein the electrical signal receiving module 111 is used to output the current signal to be adjusted to the electrical signal identification module, and the electrical signal identification module 112 is used to identify the signal value level of the current signal to be adjusted; and the electrical signal identification module 112 is used to convert the current signal to be adjusted into a voltage signal to be adjusted and then transmit it to the amplifying circuit module.

[0037] Among them, in addition to receiving the electrical signal, the electrical signal receiving module 111 also needs to process the noise and interference of the received electrical signal to facilitate the output of a more accurate current signal to be adjusted; the electrical signal identification module 112 is used to process the received current signal to be adjusted, which may specifically include identifying the strength of the current signal to be adjusted, judging the signal value level, and converting the current signal to be adjusted into a voltage signal to be adjusted; the current signal to be adjusted refers to the current signal obtained by the electrical signal receiving module 111, and the signal needs to be identified and processed before it can be further amplified or used; accordingly, the voltage signal to be adjusted refers to the current signal converted into a voltage signal after being processed by the electrical signal receiving module 112, and the voltage signal is usually more stable.

[0038] As an example, the process of the electrical signal identification module 112 converting the current signal to be regulated into the voltage signal to be regulated may include a series of processing such as filtering, denoising and signal enhancement on the current signal to be regulated to eliminate noise and interference and ensure the accuracy of the data, and then perform signal conversion calculation to convert the current signal into a voltage signal.

[0039] In this embodiment, the key links of electrical signal processing are reflected through the reception, recognition, conversion and amplification of electrical signals, ensuring that the electrical signals can be processed into usable information. Through the reasonably designed reception, recognition and conversion processes, the overall efficiency of the circuit can be improved, ensuring that it can work stably in various electromagnetic environments.

[0040] In one embodiment, Figure 1 As shown, the sub-amplifier circuit includes a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2 and an operational amplifier; the first capacitor C1, the first resistor R1 and the second resistor R2 are connected in series in sequence, the second capacitor C2 is connected in parallel with the second resistor R2, and the other end of the first capacitor C1 is grounded; the first pin 1 of the operational amplifier is electrically connected to the first node N1 connected to the first resistor R1 and the second resistor R2, the second pin 2 of the operational amplifier is electrically connected to the output end of the electrical signal identification module 112, the third pin 3 of the operational amplifier is electrically connected to the second node N2 connected to the second resistor R2 and the second capacitor C2, and the third pin 3 is the signal output end of the sub-amplifier circuit; the fourth pin 4 of the operational amplifier is electrically connected to the fourth pin 4 of the operational amplifier in other sub-amplifier circuits, and the fifth pin 5 of the operational amplifier is electrically connected to the fifth pin 5 of the operational amplifier in other sub-amplifier circuits.

[0041] Among them, resistors are used to limit the flow of current in the circuit and control the distribution of voltage; capacitors are used to store electrical energy and regulate voltage changes in the circuit; operational amplifiers are high-gain electronic amplifiers that can achieve various functions such as addition, subtraction, integration and differentiation through external circuit configuration.

[0042] As an example, the first pin 1 can be the feedback terminal of the operational amplifier in the sub-amplifier circuit, the second pin 2 can be the input terminal, the third pin 3 can be the output terminal, the fourth pin 4 can be the positive power supply terminal, and accordingly, the fifth pin 5 can be the negative power supply terminal.

[0043] More preferably, the positive power supply terminal and the negative power supply terminal of the sub-amplifier circuit are also connected to a power supply module, and the power supply module is respectively connected to the multiple groups of sub-amplifier circuits in the amplifier circuit module.

[0044] In this embodiment, the sub-amplifier circuit can effectively amplify the electrical signal through the connection and interaction of resistors, capacitors and operational amplifiers, and can be connected with other circuit modules to ensure stable transmission and amplification of the electrical signal in the circuit.

[0045] In one embodiment, the amplifier circuit module includes a first sub-amplifier circuit, a second sub-amplifier circuit, a third sub-amplifier circuit and a fourth sub-amplifier circuit connected in parallel; the signal value gear of the first sub-amplifier circuit is the kiloampere gear, the signal value gear of the second sub-amplifier circuit is the ampere gear, the signal value gear of the third sub-amplifier circuit is the milliampere gear, and the signal value gear of the fourth sub-amplifier circuit is the microampere gear.

[0046] Among them, the first sub-amplifier circuit is designed to process signals with higher current levels, and its signal value range is the kiloampere range, which can be used to process current signals up to kiloamperes; correspondingly, the second sub-amplifier circuit, the third sub-amplifier circuit and the fourth sub-amplifier circuit are used to process currents of amperes, milliamperes and microamperes, respectively.

[0047] In this embodiment, by configuring sub-amplifier circuits of different gears in parallel, an appropriate circuit can be selected to process the signal according to the needs of the actual application, thereby improving the adaptability and flexibility of the entire amplifier circuit module, enabling the amplifier circuit module to efficiently amplify and process various types of current signals, thereby improving the working efficiency of the circuit.

[0048] Further, in one embodiment, the resistance value of the first resistor R1 in the kiloampere amplifier circuit is 100-120 kiloohms, the resistance value of the first resistor R1 in the ampere amplifier circuit is 48-55 kiloohms, the resistance value of the first resistor R1 in the milliampere amplifier circuit is 18-24 kiloohms, and the resistance value of the first resistor R1 in the microampere amplifier circuit is 4.5-5.5 kiloohms.

[0049] Among them, according to the different amplitude ranges of current signals processed by the circuits of each gear, setting the corresponding resistance value can enable the circuit to accurately amplify the signal within the required range; in addition, the input impedance of the amplifier circuit needs to match the signal source being processed. If the input impedance is too high, it will affect the acquisition and amplification of the signal. Setting a suitable first-point resistance value can avoid signal distortion; and a suitable first resistor R1 value can reduce the noise in the circuit and improve the signal-to-noise ratio of the signal; the gain setting of each sub-amplifier circuit is closely related to the value of the first resistor R1. The choice of resistance value affects the gain characteristics of the amplifier circuit, which can adapt it to signals of different amplitudes.

[0050] As an example, the resistance value of the first resistor R1 in the kiloampere amplifier circuit can be 100 kiloohms, the resistance value of the first resistor R1 in the ampere amplifier circuit can be 51.2 kiloohms, the resistance value of the first resistor R1 in the milliampere amplifier circuit can be 21 kiloohms, and the resistance value of the first resistor R1 in the microampere amplifier circuit can be 5.1 kiloohms.

[0051] In this embodiment, by accurately setting the value of the first resistor R1, it is ensured that each amplifier circuit can operate at optimal performance, power consumption can be controlled during the amplification process, and different resistance values ​​can ensure that each amplifier circuit maintains stable operation within its specific operating range, thereby effectively processing signals of different amplitudes and improving the overall effect and stability of the anti-blocking circuit.

[0052] Furthermore, the present application provides an anti-blocking method in a strong electromagnetic environment, which is applied to the anti-blocking circuit in a strong electromagnetic environment in the above-mentioned embodiment, and the anti-blocking circuit includes an electrically connected electrical signal monitoring module and an amplifying circuit module; the electrical signal monitoring module includes an electrical signal receiving module and an electrical signal identification module, and the amplifying circuit module includes at least two groups of sub-amplifying circuits connected in parallel; the signal value levels of the electrical signals output by each sub-amplifying circuit are different; the method includes: when the electrical signal identification module receives the electrical signal to be adjusted output by the electrical signal receiving module, identifying the signal value level of the electrical signal to be adjusted, and based on the preset association relationship between the signal value level and the signal value level of the sub-amplifying circuit, controlling the sub-amplifying circuit with the corresponding signal value level in the switching amplifying circuit module to receive and process the electrical signal to be adjusted, so as to avoid blocking of the amplifying circuit module; wherein the electrical signal receiving module is used to output the electrical signal to be adjusted to the electrical signal identification module based on the electromagnetic field strength in the strong electromagnetic environment.

[0053] In this embodiment, the electrical signal is captured and received by the electrical signal receiving module in a strong electromagnetic environment by relying on the strength of the electromagnetic field. After passing through the electrical signal receiving module, the signal is transmitted to the electrical signal identification module for further processing, wherein the electrical signal to be adjusted is the signal that currently needs to be identified, analyzed and ultimately amplified; in the electrical signal identification module, by analyzing the characteristics such as the amplitude, nature and frequency of the received electrical signal, its specific signal value level such as kiloamperes, amperes, milliamperes, microamperes, etc. is identified, and based on the identified signal value level, the corresponding sub-amplifier circuit in the amplification circuit module is automatically controlled to switch, and through layer-by-layer analysis and selection, the effectiveness and reliability of the electrical signal processing are ensured, and circuit blocking is effectively prevented.

[0054] Furthermore, in one embodiment, it also includes an anti-blocking method in a strong electromagnetic environment, which is applied to the anti-blocking circuit in the above-mentioned strong electromagnetic environment, and the anti-blocking circuit includes an electrically connected electrical signal monitoring module and an amplifying circuit module; the electrical signal monitoring module includes an electrical signal receiving module and an electrical signal identification module, and the amplifying circuit module includes at least two groups of sub-amplifying circuits connected in parallel; the signal value levels of the electrical signals output by each sub-amplifying circuit are different; the method includes: when the electrical signal identification module receives the electrical signal to be adjusted output by the electrical signal receiving module, identifying the signal value level of the electrical signal to be adjusted, and based on the preset correlation relationship between the signal value level and the signal value level of the sub-amplifying circuit, controlling the sub-amplifying circuit with the corresponding signal value level in the switching amplifying circuit module to receive and process the electrical signal to be adjusted, so as to avoid blocking of the amplifying circuit module; wherein the electrical signal receiving module is used to output the electrical signal to be adjusted to the electrical signal identification module based on the electromagnetic field strength in the strong electromagnetic environment.

[0055] In one embodiment, the electrical signal receiving module is used to output the current signal to be adjusted to the electrical signal identification module; when the electrical signal identification module receives the electrical signal to be adjusted output by the electrical signal receiving module, the signal value level of the electrical signal to be adjusted is identified, including: when the electrical signal identification module receives the current signal to be adjusted output by the electrical signal receiving module, the signal value level of the current signal to be adjusted is identified.

[0056] In one embodiment, the electrical signal recognition module is used to convert the current signal to be adjusted into the voltage signal to be adjusted, and transmit the voltage signal to be adjusted to the amplification circuit module.

[0057] Furthermore, in one embodiment, the sub-amplifier circuit includes a first resistor, a second resistor, a first capacitor, a second capacitor and an operational amplifier; the first capacitor, the first resistor and the second resistor are connected in series in sequence, the second capacitor is connected in parallel with the second resistor, and the other end of the first capacitor is grounded; the first pin of the operational amplifier is electrically connected to the first node where the first resistor and the second resistor are connected, the second pin of the operational amplifier is electrically connected to the output end of the electrical signal identification module, the third pin of the operational amplifier is electrically connected to the second node where the second resistor and the second capacitor are connected, and the third pin is the signal output end of the sub-amplifier circuit; the fourth pin of the operational amplifier is electrically connected to the fourth pin of the operational amplifier in other sub-amplifier circuits, and the fifth pin of the operational amplifier is electrically connected to the fifth pin of the operational amplifier in other sub-amplifier circuits.

[0058] In one embodiment, the amplifier circuit module includes a first sub-amplifier circuit, a second sub-amplifier circuit, a third sub-amplifier circuit and a fourth sub-amplifier circuit connected in parallel; the signal value gear of the first sub-amplifier circuit is the kiloampere gear, the signal value gear of the second sub-amplifier circuit is the ampere gear, the signal value gear of the third sub-amplifier circuit is the milliampere gear, and the signal value gear of the fourth sub-amplifier circuit is the microampere gear.

[0059] Furthermore, in one embodiment, the input and output signals of the preamplifier in the four gear working modes are as follows: Figures 2 to 5 As shown, curve 1 is the voltage signal sensed by the sensor sensitive element, that is, the signal entering the pre-amplifier circuit, and curve 2 is the output signal after the pre-amplifier circuit adjusts the amplification gear. The amplification factor of the kiloampere gear is extremely small, which can reduce the extremely high voltage to the unsaturated voltage output range of the sensor; the amplification factor of the ampere gear is higher than that of the kiloampere gear, and the output voltage is also adjusted to the unsaturated voltage output range of the sensor through the amplification circuit; the milliampere gear and the microampere gear amplify the input voltage, but still keep it within the unsaturated voltage output range of the sensor. The amplitude range of the signal after the four gears control amplification can be flexibly set, and the output range is limited by the power supply voltage and ADC (Analog-to-Digital Converter). For example, if the ADC is in the 5V range, the output of each gear must be controlled within this range.

[0060] In addition, if the measurement is aimed at lightning transient current, a composite pre-stage circuit architecture of main and auxiliary amplifiers can be designed. In the main amplifier channel, high-sensitivity magnetoelectric materials are selected, and low-noise, high-gain-bandwidth operational amplifiers are used for weak signals at both ends, combined with differential amplifier structure and reasonable feedback network, while introducing noise reduction measures such as low-pass filtering and electromagnetic shielding for amplification and collection. The auxiliary amplifier channel samples the high-precision, low-temperature drift, and high-power resistors in series with the TVS (Transient Voltage Suppressor) tube discharge channel, and uses high-slew rate and wide-bandwidth operational amplifiers for amplification to measure transient strong currents. Independent analog signal conditioning circuits are designed for each channel and synchronous clock control is used to ensure accurate sampling synchronization. For data processing and storage, a high-performance microcontroller is used, and digital filtering, peak detection and other algorithms are used to process data. Large-capacity, high-speed non-volatile memory is selected for storage. Power management adopts a combination of linear regulator and switching power supply, real-time monitoring and abnormal protection function. Finally, standard current source and high-precision measuring instruments are used for gain calibration, linearity testing and full-scale calibration, etc., to verify the performance, reliability and stability of the circuit structure and realize compatible collection of strong and weak currents.

[0061] In the above embodiment, through anti-blocking technology, the circuit can effectively resist external electromagnetic interference and ensure that the signal is not blocked during transmission, thereby improving the stability and reliability of the signal; and the introduction of gain adjustment technology enables the circuit to automatically adjust the gain according to the strength of the input signal in different channels, ensuring that the output signal always remains within the appropriate amplitude range, which not only improves the dynamic range of the signal, but also avoids distortion problems caused by excessive or small signals; the comprehensive application of circuit signal anti-blocking and gain adjustment technology can significantly improve the performance of the entire circuit. This technology helps to ensure clear transmission and accurate reception of signals, thereby improving the sensitivity and reliability of the circuit.

[0062] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0063] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0064] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An anti-blocking circuit in a strong electromagnetic environment, characterized in that: including an electrical signal monitoring module and an amplifying circuit module which are electrically connected; The electric signal monitoring module includes an electric signal receiving module and an electric signal identification module, and the amplifying circuit module includes at least two groups of sub-amplifying circuits connected in parallel; each of the sub-amplifying circuits outputs an electric signal with a different signal value level; The electrical signal receiving module is used to output the electrical signal to be adjusted to the electrical signal identification module based on the electromagnetic field strength in the strong electromagnetic environment. The electrical signal identification module is used to identify the signal value level of the electrical signal to be adjusted, so as to control the sub-amplifier circuit that switches the corresponding signal value gear in the amplification circuit module to receive and process the electrical signal to be adjusted based on the preset association relationship between the signal value level and the signal value gear of the sub-amplifier circuit, so as to avoid blocking of the amplification circuit module.

2. The circuit according to claim 1, characterized in that The electrical signal receiving module is used to output the current signal to be adjusted to the electrical signal identification module, and the electrical signal identification module is used to identify the signal value level of the current signal to be adjusted; and the electrical signal identification module is used to convert the current signal to be adjusted into a voltage signal to be adjusted and then transmit it to the amplifying circuit module.

3. The circuit according to claim 1, characterized in that The sub-amplification circuit includes a first resistor, a second resistor, a first capacitor, a second capacitor and an operational amplifier; The first capacitor, the first resistor and the second resistor are connected in series in sequence, the second capacitor is connected in parallel with the second resistor, and the other end of the first capacitor is grounded; The first pin of the operational amplifier is electrically connected to the first node connecting the first resistor and the second resistor, the second pin of the operational amplifier is electrically connected to the output end of the electrical signal identification module, the third pin of the operational amplifier is electrically connected to the second node connecting the second resistor and the second capacitor, and the third pin is the signal output end of the sub-amplifier circuit; the fourth pin of the operational amplifier is electrically connected to the fourth pin of the operational amplifier in the other sub-amplifier circuits, and the fifth pin of the operational amplifier is electrically connected to the fifth pin of the operational amplifier in the other sub-amplifier circuits.

4. The circuit according to claim 3, characterized in that The amplifier circuit module comprises a first sub-amplifier circuit, a second sub-amplifier circuit, a third sub-amplifier circuit and a fourth sub-amplifier circuit connected in parallel; The signal value gear of the first sub-amplifier circuit is the kiloampere gear, the signal value gear of the second sub-amplifier circuit is the ampere gear, the signal value gear of the third sub-amplifier circuit is the milliampere gear, and the signal value gear of the fourth sub-amplifier circuit is the microampere gear.

5. The circuit according to claim 4, characterized in that The resistance value of the first resistor in the kiloampere amplifier circuit is 100-120 kiloohms, the resistance value of the first resistor in the ampere amplifier circuit is 48-55 kiloohms, the resistance value of the first resistor in the milliampere amplifier circuit is 18-24 kiloohms, and the resistance value of the first resistor in the microampere amplifier circuit is 4.5-5.5 kiloohms. 6.An anti-blocking method in a strong electromagnetic environment, characterized in that: An anti-blocking circuit for use in a strong electromagnetic environment as claimed in any one of claims 1 to 5, the anti-blocking circuit comprising an electrically connected electrical signal monitoring module and an amplifying circuit module; The electric signal monitoring module includes an electric signal receiving module and an electric signal identification module, and the amplifying circuit module includes at least two groups of sub-amplifying circuits connected in parallel; each of the sub-amplifying circuits outputs an electric signal with a different signal value level; The method comprises: When the electrical signal identification module receives the electrical signal to be adjusted output by the electrical signal receiving module, the signal value level of the electrical signal to be adjusted is identified, and based on the preset association relationship between the signal value level and the signal value gear of the sub-amplifier circuit, the sub-amplifier circuit of the corresponding signal value gear in the amplifier circuit module is controlled to receive and process the electrical signal to be adjusted, so as to avoid blocking of the amplifier circuit module; wherein the electrical signal receiving module is used to output the electrical signal to be adjusted to the electrical signal identification module based on the electromagnetic field strength in the strong electromagnetic environment.

7. The method according to claim 6, characterized in that The electrical signal receiving module is used to output the current signal to be adjusted to the electrical signal identification module; When the electrical signal identification module receives the electrical signal to be adjusted output by the electrical signal receiving module, identifying the signal value level of the electrical signal to be adjusted includes: When the electric signal identification module receives the current signal to be adjusted output by the electric signal receiving module, the signal value level of the current signal to be adjusted is identified.

8. The method according to claim 7, characterized in that The method further comprises: The electrical signal recognition module is used to convert the current signal to be adjusted into a voltage signal to be adjusted, and transmit the voltage signal to be adjusted to the amplification circuit module.

9. The method according to claim 6, characterized in that The sub-amplification circuit includes a first resistor, a second resistor, a first capacitor, a second capacitor and an operational amplifier; The first capacitor, the first resistor and the second resistor are connected in series in sequence, the second capacitor is connected in parallel with the second resistor, and the other end of the first capacitor is grounded; The first pin of the operational amplifier is electrically connected to the first node connecting the first resistor and the second resistor, the second pin of the operational amplifier is electrically connected to the output end of the electrical signal identification module, the third pin of the operational amplifier is electrically connected to the second node connecting the second resistor and the second capacitor, and the third pin is the signal output end of the sub-amplifier circuit; the fourth pin of the operational amplifier is electrically connected to the fourth pin of the operational amplifier in the other sub-amplifier circuits, and the fifth pin of the operational amplifier is electrically connected to the fifth pin of the operational amplifier in the other sub-amplifier circuits.

10. The method according to claim 9, characterized in that The amplifier circuit module comprises a first sub-amplifier circuit, a second sub-amplifier circuit, a third sub-amplifier circuit and a fourth sub-amplifier circuit connected in parallel; The signal value gear of the first sub-amplifier circuit is the kiloampere gear, the signal value gear of the second sub-amplifier circuit is the ampere gear, the signal value gear of the third sub-amplifier circuit is the milliampere gear, and the signal value gear of the fourth sub-amplifier circuit is the microampere gear.

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