Dual-mode current sensor based on amorphous ribbon and detection method thereof

Abstract

The invention discloses a dual-mode current sensor based on an amorphous ribbon and a detection method thereof. The dual-mode current sensor comprises a first magnetic core, a first coil, a first framework, a first electrode and a second electrode, wherein the first electrode and the second electrode are arranged on the framework; a first detection circuit and a second detection circuit are preset; performing first combination on a dual-mode current sensor, the first detection circuit and the second detection circuit; acquiring the output of the first detection circuit and the second detection circuit in the target scene; and detection is carried out according to the output of the first detection circuit and the second detection circuit. Through the combined use of the first detection circuit and the second detection circuit, the dual-mode current sensor can detect low-frequency and high-frequency current components at the same time, thereby achieving the comprehensive monitoring of the current. The sensor is simple in design and relatively low in cost, adopts a non-intrusive design, does not cause extra power consumption and parasitic inductance to a system, and is beneficial to long-term stable operation of the system.

Description

Technical Field

[0001] The present invention relates to the field of sensor technology, and in particular to a dual-mode current sensor based on an amorphous thin strip and a detection method thereof. Background Art

[0002] As the digitalization and intelligence of power grids continue to improve, current measurement is the key to monitoring and analysis in power systems. The accuracy and reliability of its measurement are directly related to whether the power system can operate safely, reliably and economically. At present, current sensors include: resistor shunts, current transformers, Rogowski coils, Hall sensors, magnetoresistive sensors, giant magneto-impedance sensors, etc. In the face of the measurement needs of DC distribution networks in power electronic equipment under the background of new energy, high-performance non-contact current sensors have become the focus of research.

[0003] The resistor shunt is a resistance measurement method based on Ohm's law. It is an intrusive current sensor, which will cause additional power consumption and parasitic inductance in the system. Current transformers and Rogowski coils are based on Faraday's law of electromagnetic induction. They use the induced electromotive force generated by the change of magnetic flux in the conductor loop over time to reflect the change of the measured current. They cannot meet the needs of detecting DC current. Among them, the Rogowski coil has a bandwidth of usually tens of Hz to MHz and has excellent high-frequency current sensor characteristics. Hall sensors and magnetoresistive sensors are applied to current sensors by detecting the change of magnetic field generated by current. Giant magnetoimpedance (GMI) and fluxgate have high sensitivity, fast response speed, good temperature stability, and can perform well in weak magnetic field measurement. Compared with the complex design and high cost of fluxgate, GMI sensors have a simple structure and relatively low manufacturing cost, and can realize non-contact current measurement. These current sensors have the ability to detect DC current and are classified as non-invasive current sensors, but the upper limit of the current measurement bandwidth is relatively low. Therefore, high-sensitivity, high-bandwidth, AC and DC measurement current sensors have potential application value for real-time monitoring of power system current. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the present invention provides a dual-mode current sensor based on an amorphous thin strip and a detection method thereof, which can solve the problems mentioned in the background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] In a first aspect, the present invention provides a dual-mode current sensor based on an amorphous ribbon, comprising:

[0009] A first magnetic core, a first coil, a first frame, and a first electrode and a second electrode arranged on the frame;

[0010] The first electrode and the second electrode are signal input or output ports of the first coil.

[0011] In a second aspect, the present invention provides a dual-mode current sensor detection method based on an amorphous thin ribbon, comprising:

[0012] Preset a first detection circuit and a second detection circuit;

[0013] A dual-mode current sensor is first combined with the first detection circuit and the second detection circuit;

[0014] Obtaining outputs of the first detection circuit and the second detection circuit in a target scenario;

[0015] Detection is performed according to outputs of the first detection circuit and the second detection circuit.

[0016] As a preferred solution of the dual-mode current sensor detection method based on amorphous thin strips described in the present invention, the first detection circuit and the second detection circuit include:

[0017] The first detection circuit is used to detect the low-frequency current component of the target dual-mode current sensor;

[0018] The second detection circuit is used to detect a high-frequency current component of the target dual-mode current sensor.

[0019] As a preferred solution of the dual-mode current sensor detection method based on amorphous thin strips described in the present invention, the target scenario includes: any type of target current-carrying conductor passing through the dual-mode current sensor in any environment.

[0020] As a preferred solution of the dual-mode current sensor detection method based on amorphous thin strips described in the present invention, wherein: the second detection circuit includes at least one filter and two amplifiers;

[0021] The two amplifiers are connected in series.

[0022] As a preferred solution of the dual-mode current sensor detection method based on amorphous thin strip described in the present invention, wherein: the first detection circuit at least includes a gain detection module and an amplifier.

[0023] As a preferred solution of the dual-mode current sensor detection method based on amorphous thin strips described in the present invention, wherein: the first detection circuit also includes a first signal generating circuit;

[0024] The first signal generating circuit is used to generate a first signal;

[0025] The dual-mode current sensor is connected in series to the first detection circuit via a first resistor;

[0026] The first signal includes a first signal and a second signal, and the first signal is input into the dual-mode current sensor through a first resistor;

[0027] The second signal is input into a gain detection module.

[0028] As a preferred solution of the dual-mode current sensor detection method based on amorphous thin strips described in the present invention, the second detection circuit further includes:

[0029] The filter at least includes a second resistor and a first capacitor;

[0030] The two amplifiers are divided into a first-stage amplifier and a second-stage amplifier;

[0031] The voltage signal of the first capacitor is used as the input of the first stage amplifier, and the output of the first stage amplifier is used as the input of the second stage amplifier.

[0032] In a third aspect, the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned method when executing the computer program.

[0033] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the method described above when executed by a processor.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a dual-mode current sensor based on an amorphous thin strip and a detection method thereof, wherein a first magnetic core, a first coil, a first skeleton, and a first electrode and a second electrode configured on the skeleton are provided; and a first detection circuit and a second detection circuit are preset; the dual-mode current sensor is first combined with the first detection circuit and the second detection circuit; the output of the first detection circuit and the second detection circuit under the target scene is obtained; and detection is performed according to the output of the first detection circuit and the second detection circuit. Through the combined use of the first detection circuit and the second detection circuit, the dual-mode current sensor of the present invention can simultaneously detect low-frequency and high-frequency current components, thereby realizing comprehensive monitoring of the current. The dual-mode current sensor and the detection method of the present application are not only applicable to the measurement of alternating current, but also to the measurement of direct current, which broadens the application scope of the current sensor. The sensor of the present application is simple in design, relatively low in cost, and non-invasive in design, which will not cause additional power consumption and parasitic inductance to the system, and is conducive to the long-term stable operation of the system.

[0035] Specifically, the present application uses a mature magnetic core winding method with a simple structure and is easy to manufacture on a large scale. The magnetic core is made of low-cost soft magnetic amorphous alloy strips, which have the characteristics of low coercive force and high saturation magnetization. The present application utilizes the testing advantages of the giant magneto-impedance (GMI) effect from DC to low frequency, combined with the advantages of induction coils in high-frequency current measurement. Two different effects are achieved through a magnetic core and a set of coils, so that the measurement bandwidth can reach high frequency from DC. Compared with single-chip and hybrid current sensors, it can greatly solve the bandwidth limitation and reduce the number of sensors used. The overall circuit design principle is simple, and it can be more conveniently used for current measurement in different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0037] Figure 1 A method flow chart of a dual-mode current sensor based on an amorphous thin ribbon and a detection method thereof provided in one embodiment of the present invention;

[0038] Figure 2 A schematic diagram of a dual-mode current sensor structure based on an amorphous thin strip and a detection method thereof provided by an embodiment of the present invention;

[0039] Figure 3A dual-mode current sensor based on an amorphous thin strip and a detection method thereof provided by an embodiment of the present invention is tested for high-frequency current detection limits in an electromagnetic induction mode. At frequencies of 1 MHz and 10 MHz, the current amplitude is reduced from 10 mA to 1 uA.

[0040] Figure 4 A dual-mode current sensor based on an amorphous thin strip and a detection method thereof provided by an embodiment of the present invention is tested for low-frequency current detection limit in electromagnetic induction mode. At frequencies of 1 Hz and 10 Hz, the current amplitude is reduced from 100 mA to 100 uA.

[0041] Figure 5 A dual-mode current sensor based on an amorphous thin strip and a detection method thereof provided in one embodiment of the present invention is tested for low-frequency current detection limit under giant magneto-impedance effect. At frequencies of 1 Hz and 10 MHz, the current amplitude is reduced from 100 mA to 1 uA.

[0042] Figure 6 A schematic diagram of a dual-mode current sensor hardware detection circuit of a dual-mode current sensor based on an amorphous thin ribbon and a detection method thereof provided by an embodiment of the present invention;

[0043] Figure 7 An internal structural diagram of a computer device for a dual-mode current sensor based on an amorphous thin ribbon and a detection method thereof provided in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0045] Example 1

[0046] Reference Figure 1-Figure 7 , which is the first embodiment of the present invention, provides a dual-mode current sensor based on an amorphous thin strip and a detection method thereof, comprising:

[0047] There are some problems in the existing related technologies. For example, traditional current sensors often have difficulty in achieving both high-precision measurement and fast response, which is particularly prominent in some applications that are sensitive to current changes. In addition, due to environmental factors or equipment aging, the performance of the sensor may gradually decline, resulting in inaccurate measurement results.

[0048] The present application provides a method that can effectively solve the above-mentioned problems. Next, multiple embodiments will be combined to explain in detail how to implement the design of the dual-mode current sensor;

[0049] In this embodiment, it is also provided Figure 2 The schematic diagram of the structure of a dual-mode current sensor based on an amorphous thin strip and a detection method thereof is shown, comprising:

[0050] A first magnetic core, a first coil, a first frame, and a first electrode and a second electrode arranged on the frame;

[0051] The first electrode and the second electrode are signal input or output ports of the first coil.

[0052] In an optional embodiment, the first magnetic core can be made of a material with high magnetic permeability to improve the sensitivity and measurement accuracy of the sensor. For example, an iron-nickel alloy material can be used, which not only has a high magnetic permeability, but also can maintain stable magnetic properties when the temperature changes, thereby ensuring the reliability of the sensor in different environments. Soft magnetic materials such as silicon steel sheets or ferrites can also be used, which can also provide good magnetic permeability and are relatively low in cost.

[0053] In another optional embodiment, the shape design of the first magnetic core also has an important influence on the sensor performance. For example, a ring-shaped or E-shaped design can effectively reduce magnetic leakage and improve the concentration of the magnetic field, thereby enhancing the detection capability of the sensor.

[0054] In another optional embodiment, special treatment is performed on the surface of the first magnetic core, such as coating an insulating layer, to prevent the current sensor from short-circuiting when operating in a high voltage environment, thereby further improving its safety and stability.

[0055] In another optional embodiment, the shape of the first magnetic core can be designed to be ring-shaped to form a closed magnetic circuit, reduce magnetic leakage, and further improve the performance of the sensor.

[0056] In the embodiment of the present application, the core material is selected from soft magnetic material, amorphous thin strip (1K101), with a width of 0.1-1.0mm, a length of 50-5000mm, and a thickness of 25-35um.

[0057] In an optional embodiment, the first coil may be wound on the first magnetic core to form an induction coil for sensing current changes and generating corresponding voltage signals.

[0058] In another optional embodiment, the sensing sensitivity and measuring range of the sensor can be adjusted by changing the number of turns and wire diameter of the coil.

[0059] In the embodiment of the present application, the coil is formed by uniformly and overlappingly winding 500-5000 turns of enameled copper wire with a diameter of 0.025-0.100 mm using a single-wire unidirectional dense winding method, and epoxy resin is coated to fix the coil.

[0060] In an optional embodiment, the first skeleton may be made of insulating material to ensure good insulation between coils and between the coils and electrodes.

[0061] In another optional embodiment, the first skeleton serves as a supporting structure, which not only fixes the positions of the first magnetic core and the first coil, but also provides a stable mounting platform for the first electrode and the second electrode, thereby ensuring the stability and reliability of signal transmission.

[0062] In an optional embodiment, the first electrode and the second electrode may be made of a material with good electrical conductivity to ensure stable transmission of signals.

[0063] In another optional embodiment, in order to further improve the performance of the sensor, the first electrode and the second electrode may also be designed to have a specific shape and size to optimize the input and output characteristics of the signal.

[0064] Exemplarily, the dual-mode current sensor is composed of an amorphous thin-strip magnetic core, a copper coil and a frame. Electrode 1 and electrode 2 are the input / output signal ports of the coil, such as Figure 2 shown.

[0065] Specifically, the magnetic core material is a soft magnetic material, an amorphous thin strip (1K101), with a width of 0.1-1.0 mm, a length of 50-5000 mm, and a thickness of 25-35 um.

[0066] It should be noted that since the current passing through the conductor will generate a circular closed magnetic field, a skeleton with a curvature radius of 10mm-50mm is designed to assemble the magnetic core amorphous thin strip to ensure the concentration and stability of the magnetic field of the measured current.

[0067] Furthermore, the coil is formed by uniformly and overlappingly winding 500-5000 turns of enameled copper wire with a diameter of 0.025-0.100 mm by a single-wire unidirectional dense winding method, and epoxy resin is coated to fix the coil.

[0068] In the embodiment of the present application, a coil wound with an amorphous thin-strip magnetic core is provided, which utilizes the self-resonance characteristics of the magnetic core winding. Since the enameled copper wire winding used in the magnetic core coil generates a parasitic capacitance C p , parasitic capacitance and self-inductance L p This is equivalent to a parallel resonance state, and self-resonance will occur at a certain frequency. The resonant frequency of the magnetic core coil in the present invention is:

[0069]

[0070] It should be noted that the design of the dual-mode current sensor structure can measure both AC and DC currents, which improves the flexibility and applicability of current detection. By optimizing the structural design of the sensor, fast response and high-precision measurement of current signals of different frequencies can be achieved.

[0071] In summary, the present application uses a mature magnetic core winding method with a simple structure and is easy to manufacture on a large scale. The magnetic core is made of low-cost soft magnetic amorphous alloy strips, which have the characteristics of low coercive force and high saturation magnetization. The present application utilizes the testing advantages of the giant magneto-impedance (GMI) effect from DC to low frequency, combined with the advantages of induction coils in high-frequency current measurement. Two different effects are achieved through a magnetic core and a set of coils, so that the measurement bandwidth can reach high frequency from DC. Compared with single-chip and hybrid current sensors, it can greatly solve the bandwidth limitation and reduce the number of sensors used. The overall circuit design principle is simple, and it can be more conveniently used for current measurement in different scenarios.

[0072] Example 2

[0073] In a preferred embodiment, a lock-in amplifier (SR865) is used to test the dual-mode current sensor. A current source (Keithley 6221) is used to provide a standard AC current signal to the conductor, and the energized conductor passes through the dual-mode current sensor, and the energized conductor coincides with the center of the frame.

[0074] As an example of an application scenario, the core coil is tested in electromagnetic induction mode at 1MHz and 10MHz current detection limit (LOD), such as Figure 3 As shown. Provide a current with a gradually decreasing amplitude from 10mA to 10uA, and the sensor output voltage signal decreases linearly with the current amplitude. Continue to reduce the current, and it is found that the sensor output voltage signal presents a scattered distribution. It can be seen from the figure that the sensor can measure the minimum limit of 3uA@1MHz and 3uA@10MHz. According to the test and analysis results, it can be explained that the sensor is completely feasible to measure high-frequency current using the electromagnetic induction mode, and the test performance is excellent.

[0075] As another example of application scenario, the sensor's ability to detect low-frequency current in electromagnetic induction mode is tested. Figure 4 The results of the sensor current detection limit at 1Hz and 10Hz are shown. Provide a current with a gradually decreasing amplitude from 100mA to 100uA and observe the output voltage of the sensor at 1Hz and 10Hz. Figure 4In (a), the current decreases from 100mA to 1mA, and the output voltage of the sensor decreases with the decrease in amplitude, showing an obvious linear relationship. When the current continues to decrease, the output voltage of the sensor shows a scattered distribution, indicating that the measurement limit of the 10Hz AC current sensor is expanded to 1mA at the minimum. However, Figure 4 In (b), the output voltage of the sensor does not change as the current decreases, and is scattered from 100mA to 100uA. From the test results, it can be seen that the performance of the sensor for low-frequency current is insufficient in the electromagnetic induction mode. This is because the principle of electromagnetic induction relies on the change of magnetic field over time, and the DC magnetic field does not produce a changing magnetic flux. The low-frequency magnetic field changes slowly over time, resulting in a small induced electromotive force, and the relationship is:

[0076]

[0077] It should be noted that in order to improve the limitations of magnetic core coils that rely on the electromagnetic induction principle in DC and low-frequency measurements, the giant magneto-impedance effect is used to achieve DC and low-frequency current measurements.

[0078] like Figure 5 The results show the current detection limit of the 1Hz and 10Hz frequency sensors under the giant magneto-impedance effect of the magnetic core coil. Figure 5 In (a), the current decreases from 100mA to 100uA at 10Hz, and the output voltage of the sensor decreases linearly with the decrease of the current. When the current continues to decrease, the output voltage of the sensor is scattered, and the minimum measurement limit of the sensor in the giant magnetoimpedance mode can reach 20uA@10Hz. Figure 5 In (b), we can see that the minimum measurement limit of the sensor in giant magneto-impedance mode can reach 70uA@1Hz. Figure 4 and Figure 5 From the test results, it can be found that the giant magneto-impedance mode makes up for the shortcomings of the electromagnetic induction mode in low-frequency current testing.

[0079] Therefore, the giant magneto-impedance effect and electromagnetic induction of the magnetic core coil can be used to meet the measurement requirements from DC to high frequency.

[0080] Example 3

[0081] In this embodiment, it is also provided Figure 1 The method flow chart of a dual-mode current sensor based on an amorphous thin strip and a detection method thereof includes:

[0082] S101, presetting a first detection circuit and a second detection circuit;

[0083] In an embodiment of the present application, the first detection circuit and the second detection circuit include:

[0084] The first detection circuit is used to detect the low-frequency current component of the target dual-mode current sensor;

[0085] The second detection circuit is used to detect a high-frequency current component of the target dual-mode current sensor.

[0086] In an optional embodiment, the first detection circuit may include a low-pass filter and a voltage detector for measuring the low-frequency current component. The low-pass filter is used to filter out high-frequency signals to ensure that the voltage detector is only sensitive to the low-frequency current component. The voltage detector may be a high-precision analog-to-digital converter that converts the low-frequency current component into a digital signal for subsequent processing and analysis.

[0087] However, the low-frequency current of the first detection circuit is relatively weak, so a gain detection module must be designed at the same time to increase the strength of the detection signal.

[0088] In an optional embodiment, the gain detection module may be a high-gain amplifier, which can amplify the voltage signal of the low-frequency current component, thereby improving the sensitivity and accuracy of the measurement.

[0089] In an optional embodiment, in order to ensure signal stability and reduce noise interference, the gain detection module may also include a low noise amplifier design. Through such a design, the performance of the detection circuit can be guaranteed even when the current signal is weak, thereby meeting the requirements of high-precision measurement.

[0090] In the embodiment of the present application, the first detection circuit includes at least a gain detection module and an amplifier.

[0091] In an optional embodiment, the second detection circuit may include a high-pass filter for filtering out low-frequency signals to ensure that the voltage detector is only sensitive to high-frequency current components. Such a design allows the second detection circuit to focus on analyzing and processing high-frequency signals, thereby achieving accurate measurement of different frequency components of the current signal. The use of a high-pass filter, combined with an appropriate gain detection module, can further improve the performance of the current sensor, enabling it to adapt to a wider range of application scenarios.

[0092] In another optional embodiment, the second detection circuit may also include a bandpass filter that can selectively pass signals within a specific frequency range, thereby achieving accurate control and measurement of a specific frequency band in the current signal. The use of a bandpass filter, combined with a high-pass filter and a gain detection module, can provide the current sensor with more flexible detection capabilities, enabling it to be optimized for different application requirements.

[0093] In another optional embodiment, the design of the second detection circuit may further include a phase detection module for analyzing the phase information of the current signal, which is of great significance for fault detection and diagnosis of the power system. By combining these technologies, the current sensor can provide more comprehensive and accurate current monitoring, meeting the high standard requirements for current measurement in the industrial and scientific research fields.

[0094] In the embodiment of the present application, the second detection circuit includes at least one filter and two amplifiers;

[0095] The two amplifiers are connected in series.

[0096] In the embodiment of the present application, the first detection circuit further includes a first signal generating circuit;

[0097] The first signal generating circuit is used to generate a first signal;

[0098] The dual-mode current sensor is connected in series to the first detection circuit via a first resistor;

[0099] The first signal includes a first signal and a second signal, and the first signal is input into the dual-mode current sensor through a first resistor;

[0100] The second signal is input into a gain detection module.

[0101] In the embodiment of the present application, the second detection circuit further includes:

[0102] The filter at least includes a second resistor and a first capacitor;

[0103] The two amplifiers are divided into a first-stage amplifier and a second-stage amplifier;

[0104] The voltage signal of the first capacitor is used as the input of the first stage amplifier, and the output of the first stage amplifier is used as the input of the second stage amplifier.

[0105] For example, in Figure 6The giant magneto-impedance detection circuit is connected with solid lines and includes a signal generating circuit, a resistor R1, a gain detection, a differential amplifier and a dual-mode current sensor. The MAX038 chip produced by MAXIM is used as a signal generating circuit, which can generate a variety of waveforms in the frequency range of 0.1Hz-20MHz. For example, sine waves, square waves, triangle waves, sawtooth waves, etc. The driving signal S1 is provided in the series circuit of the resistor R1 and the dual-mode current sensor. The AD8302 chip produced by ANALOG DEVICES is used as a gain detection. The chip can detect the amplitude gain of signal A relative to signal B and output a DC voltage signal. The AD620 instrument amplifier chip produced by ANALOG DEVICES is used to differentially amplify signals A and B.

[0106] In an optional embodiment, the signal generating circuit generates a signal S1, one signal input is connected to the resistor R1 in series with the dual-mode current sensor, and the other signal is input to the gain detection module. After the resistor R1 drives the signal S1 to be divided, a signal S2 is obtained. After the gain detection compares the amplitude gain of the signal S2 and the signal S1, the output voltage V d , after passing through the differential amplifier, the voltage signal V1 is output. The relationship between the output voltage V1 and the current to be measured can be obtained: V1 = f1 (I).

[0107] In an optional embodiment, Figure 6 The induction coil detection circuit is connected by a dotted line and consists of a low-pass filter and two-stage operational amplifiers. The THS3091 chip produced by Texas Instruments is used as the first-stage operational amplifier. This chip is a typical current-type operational amplifier with a bandwidth of 305MHz, which is suitable for high-frequency current measurement circuits. The OPA847 chip produced by Texas Instruments is used as the second-stage operational amplifier. It is a voltage feedback budget amplifier with a gain bandwidth of up to 3.9GHz.

[0108] In an optional embodiment, the induced electromotive force of the coil is connected from the coil output end to a low-pass filter composed of a resistor R2 and a capacitor C1, with a cut-off frequency of f c =1 / (2πR2C1). The voltage signal across capacitor C1 is connected to the input of the first stage operational amplifier, and the signal through the amplifier is input to the input of the second stage operational amplifier. The output voltage signal after amplification is V2=f2(I).

[0109] It should be noted that the preset first detection circuit and the second detection circuit can achieve fast response and high-precision measurement of the current signal. The first detection circuit utilizes the high-speed current feedback characteristics of the THS3091 chip to ensure the stability and accuracy of the signal at high frequencies. The second detection circuit further amplifies and optimizes the details of the signal through the high gain bandwidth of the OPA847 chip, so that the final output voltage signal V2 can accurately reflect the current change. This dual-stage amplifier circuit design not only improves the signal-to-noise ratio of the system, but also enhances the detection capability of weak signals, thereby providing reliable measurement results in various complex environments.

[0110] S102, performing a first combination of the dual-mode current sensor, the first detection circuit, and the second detection circuit;

[0111] In an optional embodiment, the first combination can be a parallel connection, so that the output signal of the current sensor is directly connected to the input terminal of the first detection circuit. This connection allows the current sensor to directly measure the current flowing through the circuit and convert the measurement result into a voltage signal, which is then received and processed by the first detection circuit.

[0112] It should be noted that in this way, real-time monitoring and accurate measurement of the current signal can be achieved, ensuring the response speed and measurement accuracy of the entire current detection system.

[0113] In another optional embodiment, this combination also simplifies circuit design, reduces system complexity, and improves system stability and reliability.

[0114] In an optional embodiment, the first combination may also be a series connection, wherein the output signal of the current sensor is connected to the input end of the second detection circuit via a specific resistance value. This series connection makes the output signal of the current sensor generate a voltage drop when passing through the resistor, and the voltage drop is subsequently received by the second detection circuit and converted into a corresponding current value.

[0115] It should be noted that in this way, the current signal can be indirectly measured, allowing for more precise control and regulation of the current in the circuit.

[0116] In another optional embodiment, this design can also reduce interference in the circuit, improve the accuracy of current detection and the overall performance of the system.

[0117] In the embodiment of the present application, the first combination is as follows Figure 6 In the combination, two ends of the dual-mode current sensor are respectively connected in series in the first detection circuit and in parallel in the second detection circuit;

[0118] It should be noted that the first combination of the dual-mode current sensor with the first detection circuit and the second detection circuit can realize real-time monitoring of the current signal, thereby quickly responding to current changes. Through the characteristics of the dual-mode current sensor, high-precision and wide-range current measurements can be performed simultaneously. The first combination method also allows the system to automatically trigger a protection mechanism when an abnormal current is detected to ensure circuit safety. In addition, this combination method simplifies the signal processing process, reduces data processing time, and improves response speed.

[0119] S103, obtaining outputs of the first detection circuit and the second detection circuit in the target scene;

[0120] In the embodiment of the present application, the target scenario includes: any type of target energized conductor passing through the dual-mode current sensor in any environment.

[0121] In an optional embodiment, the arbitrary environment may include different measurement environments, such as an environment with a large temperature difference between indoor and outdoor, an environment with significant humidity changes, and an industrial site with electromagnetic interference, etc. In view of these different environmental conditions, the dual-mode current sensor is designed with corresponding protection measures to ensure stable operation in various environments.

[0122] In an optional embodiment, environmental adaptability is also considered in the material selection and structural design of the sensor to reduce the impact of environmental factors on measurement accuracy.

[0123] In an optional embodiment, any type of target energized conductor may include different energized conductors, such as cables, busbars, transformer windings, or other conductive elements in electrical equipment. The dual-mode current sensor can flexibly adapt to these energized conductors of different shapes and sizes through its annular design, thereby achieving accurate current measurement. The amorphous thin strip material inside the sensor has the characteristics of high magnetic permeability and low coercivity, which makes it extremely sensitive and has a fast response time when sensing current changes.

[0124] It should be noted that, since the detection environment of the energized conductor is different and the types of the energized conductor are different, a dual-mode current sensor that can be used in any environment and applied to any type of energized conductor is designed. The specific shape of the dual-mode current sensor is a ring, which means that it can be optimized according to the specific size of the energized conductor to be tested, so that the energized conductor can pass through the dual-mode current sensor, and finally the detection of the dual-mode current sensor can be realized;

[0125] S104: Perform detection according to outputs of the first detection circuit and the second detection circuit.

[0126] In an optional embodiment, the following steps may be used to perform detection according to the outputs of the first detection circuit and the second detection circuit:

[0127] First, the output of the first detection circuit is analyzed to determine the magnitude and change trend of the low-frequency current component. Since the low-frequency current component is usually related to the DC current, a low-pass filter and a voltage detector can be used to obtain a stable low-frequency signal. The low-pass filter can effectively filter out high-frequency noise, while the high-precision analog-to-digital converter converts the analog signal into a digital signal for subsequent processing.

[0128] Next, the output of the second detection circuit is analyzed to determine the magnitude and change trend of the high-frequency current component. The high-pass filter is used to filter out low-frequency signals to ensure that the voltage detector is only sensitive to high-frequency current components. The high-pass filter and the appropriate gain detection module can improve the response speed and measurement accuracy of the current sensor to high-frequency signals.

[0129] The outputs of the first and second detection circuits are then analyzed together to get a complete view of the current signal. By comparing and combining the outputs of the two circuits, the total value of the current can be measured more accurately while taking into account the effects of different frequency components.

[0130] Finally, based on the results of the comprehensive analysis, the current signal can be monitored and controlled in real time. If the current value is detected to be beyond the preset safety range, the system can automatically trigger a protection mechanism, such as disconnecting the circuit or sounding an alarm, to prevent possible equipment damage or safety accidents.

[0131] Through the above steps, the dual-mode current sensor and the detection method thereof can achieve fast, accurate and comprehensive measurement of current signals, meeting the needs of various complex application scenarios.

[0132] In summary, the present invention proposes a dual-mode current sensor detection method based on an amorphous thin strip, and a first magnetic core, a first coil, a first skeleton, and a first electrode and a second electrode configured on the skeleton are provided; and a first detection circuit and a second detection circuit are preset; a dual-mode current sensor is first combined with the first detection circuit and the second detection circuit; the output of the first detection circuit and the second detection circuit in the target scene is obtained; and detection is performed according to the output of the first detection circuit and the second detection circuit. Through the combined use of the first detection circuit and the second detection circuit, the dual-mode current sensor of the present invention can simultaneously detect low-frequency and high-frequency current components, thereby realizing comprehensive monitoring of the current. The dual-mode current sensor and its detection method of the present application are not only suitable for the measurement of alternating current, but also for the measurement of direct current, which broadens the application range of the current sensor. The sensor of the present application is simple in design, relatively low in cost, and non-invasive in design, which will not cause additional power consumption and parasitic inductance to the system, and is conducive to the long-term stable operation of the system.

[0133] This embodiment also provides a computer device, which may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 7 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a dual-mode current sensor detection method based on an amorphous thin strip is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a button, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0134] This embodiment further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0135] Preset a first detection circuit and a second detection circuit;

[0136] A dual-mode current sensor is first combined with the first detection circuit and the second detection circuit;

[0137] Obtaining outputs of the first detection circuit and the second detection circuit in a target scenario;

[0138] Detection is performed according to outputs of the first detection circuit and the second detection circuit.

[0139] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0140] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0141] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0142] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0143] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0144] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0145] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A dual-mode current sensor based on an amorphous ribbon, characterized in that: include: A first magnetic core, a first coil, a first frame, and a first electrode and a second electrode arranged on the frame; The first electrode and the second electrode are signal input or output ports of the first coil.

2. A dual-mode current sensor detection method based on an amorphous ribbon, characterized in that: include: Preset a first detection circuit and a second detection circuit; A dual-mode current sensor is first combined with the first detection circuit and the second detection circuit; Obtaining outputs of the first detection circuit and the second detection circuit in a target scenario; Detection is performed according to outputs of the first detection circuit and the second detection circuit.

3. The dual-mode current sensor detection method based on amorphous thin ribbon according to claim 2, characterized in that: The first detection circuit and the second detection circuit include: The first detection circuit is used to detect the low-frequency current component of the target dual-mode current sensor; The second detection circuit is used to detect a high-frequency current component of the target dual-mode current sensor.

4. The dual-mode current sensor detection method based on amorphous thin ribbon according to claim 3, characterized in that: The target scenario includes any type of target energized conductor passing through the dual-mode current sensor under any environment.

5. The dual-mode current sensor detection method based on amorphous thin ribbon according to claim 4, characterized in that: The second detection circuit includes at least one filter and two amplifiers; The two amplifiers are connected in series.

6. The dual-mode current sensor detection method based on amorphous thin ribbon according to claim 5, characterized in that: The first detection circuit at least includes a gain detection module and an amplifier.

7. The dual-mode current sensor detection method based on amorphous thin ribbon according to claim 6, characterized in that: The first detection circuit also includes a first signal generating circuit; The first signal generating circuit is used to generate a first signal; The dual-mode current sensor is connected in series to the first detection circuit via a first resistor; The first signal includes a first signal and a second signal, and the first signal is input into the dual-mode current sensor through a first resistor; The second signal is input into a gain detection module.

8. The dual-mode current sensor detection method based on amorphous thin ribbon according to claim 7, characterized in that: The second detection circuit also includes: The filter at least includes a second resistor and a first capacitor; The two amplifiers are divided into a first-stage amplifier and a second-stage amplifier; The voltage signal of the first capacitor is used as the input of the first stage amplifier, and the output of the first stage amplifier is used as the input of the second stage amplifier.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 2 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 2 to 8 are implemented.

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