Voltage and current measurement method, system, device and storage medium

Abstract

The present application belongs to the technical field of voltage and current measurement, and discloses a voltage and current measurement method, system, device and storage medium. The method includes: obtaining system parameters of a voltage and current measurement system, periodically obtaining induced power collected by an inductive power collection module, adjusting the power supply mode and sampling time interval of the voltage and current measurement system based on the numerical value of the induced power and in combination with the system parameters, and controlling the voltage and current measurement module to collect the voltage and current of the circuit to be measured according to the adjusted power supply mode and the adjusted sampling time interval; measuring the voltage and current through the voltage and current measurement system and the power supply mode and sampling time interval adjusted based on the numerical value of the induced power, thereby improving the voltage and current measurement efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of voltage and current measurement, and in particular to a voltage and current measurement method, system, device, and storage medium. Background Art

[0002] In power systems, power quality monitoring of low-voltage distribution networks plays a vital role in ensuring safe, stable, and efficient operation of the power system, as well as supporting the development of new energy and high-end manufacturing industries. Voltage and current measurements on distribution lines directly determine the accuracy of power quality monitoring, which in turn impacts the safety and reliability of the distribution network. Power quality monitoring systems rely on measuring devices to collect voltage and current data and transmit it over long distances. The power supply to these devices is crucial to the reliability and stability of the monitoring system. Traditional power supply methods rely on contact power extraction, which is not only difficult to install and operate but also poses safety risks to the distribution network and equipment.

[0003] To address the above issues, inductive power generation combined with energy storage batteries is gradually being adopted. Inductive power generation technology is a technology that uses the principle of electromagnetic induction to obtain electrical energy from transmission lines. Its core is to use electromagnetic induction to inductively draw power from the magnetic field generated by the load current in the conductor. Although this power supply method has advantages over traditional contact power generation, such as small size, light weight, and easy installation, inductive power generation has low power and depends on the current of the transmission line. If the transmission line fails or the current is too low, resulting in a power generation dead zone, the power generation capacity will be seriously affected. At this time, it will be almost impossible to power the measuring device, which will seriously affect the stability of voltage and current measurements.

[0004] Therefore, in order to solve the technical problem that the existing voltage and current measurement system has a small current dead zone when using induction power supply, which affects the power supply capability and causes problems in the voltage and current measurement process, a voltage and current measurement method, system, equipment and storage medium are urgently needed. Summary of the Invention

[0005] The purpose of this application is to provide a voltage and current measurement method, system, device and storage medium, which adjust the power supply mode and sampling time interval of the voltage and current measurement system by the numerical value of the induction power, and control the voltage and current measurement module to collect the voltage and current of the circuit to be measured through the adjusted power supply mode and the adjusted sampling time interval, thereby solving the technical problem that the existing voltage and current measurement system has a small current dead zone when using induction power, which affects the power supply capacity and causes problems in the voltage and current measurement process. It can ensure the normal operation of the voltage and current measurement process when the power supply dead zone occurs, avoid the power supply dead zone affecting the voltage and current measurement process, and improve the voltage and current measurement efficiency.

[0006] In a first aspect, the present application provides a voltage and current measurement system, which includes a voltage and current measurement module, an energy storage battery, and an induction power extraction module electrically connected to each other;

[0007] The voltage and current measurement module is used to adjust the power supply mode and sampling time interval during measurement according to the induced power measured by the inductive power acquisition module to obtain the voltage and current of the circuit to be measured;

[0008] The energy storage battery is used to provide power to the voltage and current measurement module when the circuit to be measured cannot operate normally or the current is too small, resulting in a dead zone for power extraction;

[0009] The inductive power acquisition module is used to obtain electric energy from the circuit to be tested to measure the induced power corresponding to the electric energy, and when the circuit to be tested operates normally, the electric energy is supplied to the voltage and current measurement module and the energy storage battery.

[0010] The voltage and current measurement system provided in the present application can measure voltage and current. Through the inductive power supply module, electric energy is provided to the voltage and current measurement module when the circuit to be measured is operating normally. Through the energy storage battery, electric energy is provided to the voltage and current measurement module when the circuit to be measured cannot operate normally or the current is too small, resulting in a power supply dead zone. This solves the technical problem that the existing voltage and current measurement system has a small current power supply dead zone when using inductive power supply, which affects the power supply capacity and causes problems in the voltage and current measurement process. It can ensure the normal operation of the voltage and current measurement process when the power supply dead zone occurs, avoid the power supply dead zone affecting the voltage and current measurement process, and improve the voltage and current measurement efficiency.

[0011] Optionally, the induction power module includes an induction coil, a protection circuit, a rectifier circuit, a filter circuit and a voltage stabilizing circuit connected in sequence, and a control circuit connected to the induction coil, the protection circuit, the rectifier circuit and the voltage stabilizing circuit respectively;

[0012] The induction coil is used to obtain electrical energy from the circuit to be tested through the principle of electromagnetic induction, and is used to measure the induced power corresponding to the electrical energy;

[0013] The protection circuit is used to ensure the safety of the induction power module;

[0014] The rectifier circuit is used to convert the AC power provided by the induction coil into DC power;

[0015] The filtering circuit is used to filter out noise and interference in DC power;

[0016] The voltage stabilizing circuit is electrically connected to the voltage and current measurement module and the energy storage battery respectively, and is used to maintain the voltage of the induction power module stable;

[0017] The control circuit is used to control the induction coil, the protection circuit, the rectification circuit and the voltage stabilization circuit.

[0018] The voltage and current measuring device provided in the present application can measure voltage and current. Through the induction coil, protection circuit, rectifier circuit, filter circuit, voltage stabilization circuit and control circuit, power is taken from the induction coil, and then after clamping protection, rectification, filtering and voltage stabilization, the voltage and current measurement module is powered or the energy storage battery is charged. When the circuit to be measured is operating normally, the voltage and current measurement module can be driven to operate normally. When the circuit to be measured cannot operate normally or the current is too small, resulting in a power supply dead zone, the voltage and current measurement module can be driven to operate normally through the energy storage battery, which is conducive to improving the voltage and current measurement efficiency.

[0019] Optionally, the voltage and current measurement system further includes a wireless communication module;

[0020] The wireless communication module is used to transmit the current and voltage obtained by the voltage and current measurement module, and to transmit the induced power measured by the inductive power acquisition module.

[0021] In a second aspect, the present application provides a voltage and current measurement method, which is applied to the voltage and current measurement system described above to measure voltage and current, comprising the steps of:

[0022] Obtaining system parameters of the voltage and current measurement system;

[0023] Periodically acquiring the induction power collected by the induction power acquisition module;

[0024] Based on the numerical value of the induced power and in combination with the system parameters, adjusting the power supply mode and sampling time interval of the voltage and current measurement system;

[0025] According to the adjusted power supply mode and the adjusted sampling time interval, the voltage and current measurement module is controlled to collect the voltage and current of the circuit to be measured.

[0026] The voltage and current measurement method provided in the present application can realize the measurement of voltage and current. By adjusting the numerical value of the induced power, the power supply mode and sampling time interval of the voltage and current measurement system are adjusted. By adjusting the power supply mode and the adjusted sampling time interval, the voltage and current measurement module is controlled to collect the voltage and current of the circuit to be measured. This solves the technical problem that the existing voltage and current measurement system has a small current dead zone when using induction power supply, which affects the power supply capacity and causes problems in the voltage and current measurement process. It can ensure the normal operation of the voltage and current measurement process when the power supply dead zone occurs, avoid the power supply dead zone affecting the voltage and current measurement process, and improve the voltage and current measurement efficiency.

[0027] Optionally, adjusting the power supply mode and sampling time interval of the voltage and current measurement system based on the numerical value of the induced power in combination with the system parameters includes:

[0028] Based on the system parameters, the voltage and current sampling power of the voltage and current measurement system is calculated;

[0029] According to the relationship between the induced power and the voltage and current sampling power, the power supply mode and sampling time interval of the voltage and current measurement system are adjusted.

[0030] Optionally, calculating the voltage and current sampling power of the voltage and current measurement system based on the system parameters includes:

[0031] Extracting the time and energy required to complete one voltage and current sampling from the system parameters;

[0032] The voltage and current sampling power of the voltage and current measurement system is calculated based on the ratio of the energy to the time.

[0033] Optionally, adjusting the power supply mode and sampling time interval of the voltage and current measurement system according to the relationship between the induced power and the voltage and current sampling power includes:

[0034] When the induced power is greater than or equal to the voltage and current sampling power, it is determined that the circuit to be tested is in a normal operating state, the inductive power acquisition module is controlled to provide power to the voltage and current measurement module and the energy storage battery, and the sampling time interval of the voltage and current measurement system is adjusted to the time required to complete one voltage and current sampling;

[0035] When the induced power is less than the voltage and current sampling power, and the induced power is greater than or equal to a preset safe power-taking threshold, controlling the inductive power-taking module to provide power to the voltage and current measurement module, and adjusting the sampling time interval of the voltage and current measurement system to the product of the induced power and the energy required to complete one voltage and current sampling;

[0036] When the induced power is less than the preset safe power-drawing threshold, it is determined that the circuit to be tested is in an abnormal operating state or the current is too small, resulting in a power-drawing dead zone. The energy storage battery is controlled to provide power to the voltage and current measurement module, and the sampling time interval of the voltage and current measurement system is adjusted to the inverse of the fixed frequency of voltage and current data sampling when the energy storage battery is powered.

[0037] The voltage and current measurement method provided in the present application can measure voltage and current. When the induced power is less than the preset safe power-on threshold, it indicates that the circuit to be measured is in an abnormal operating state or the current is too small, resulting in a power-on dead zone. The energy storage battery is controlled to provide power to the voltage and current measurement module, which can avoid the power-on dead zone affecting the voltage and current measurement process and ensure the normal operation of the voltage and current measurement.

[0038] In a third aspect, the present application provides an electronic device comprising a processor and a memory, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, it runs the steps in the voltage and current measurement method described above.

[0039] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps in the voltage and current measurement method described above are executed.

[0040] Beneficial effects: The voltage and current measurement method, system, equipment and storage medium provided in the present application adjust the power supply mode and sampling time interval of the voltage and current measurement system by the numerical value of the induced power, and control the voltage and current measurement module to collect the voltage and current of the circuit to be measured by the adjusted power supply mode and the adjusted sampling time interval, thereby solving the technical problem that the existing voltage and current measurement system has a small current dead zone when using induction power supply, which affects the power supply capacity and causes problems in the voltage and current measurement process. It can ensure the normal operation of the voltage and current measurement process when the power supply dead zone occurs, avoid the power supply dead zone affecting the voltage and current measurement process, and improve the voltage and current measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the structure of the voltage and current measurement system provided in an embodiment of the present application.

[0042] Figure 2 This is a flow chart of the voltage and current measurement method provided in an embodiment of the present application.

[0043] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0044] Figure 4 This is a schematic diagram of the structure of the inductive power supply module provided in an embodiment of the present application.

[0045] Explanation of reference numerals: 1. Voltage and current measurement module; 2. Energy storage battery; 3. Inductive power acquisition module; 4. Induction coil; 5. Protection circuit; 6. Rectification circuit; 7. Filter circuit; 8. Voltage stabilization circuit; 9. Control circuit; 10. Wireless communication module; 301. Processor; 302. Memory; 303. Communication bus. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work fall within the scope of protection of the present application.

[0047] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0048] refer to Figure 1 The present application provides a voltage and current measurement system for measuring voltage and current, comprising a voltage and current measurement module 1, an energy storage battery 2 and an inductive power module 3 electrically connected to each other; wherein, Figure 1 The arrow in the figure indicates the direction of current flow;

[0049] The voltage and current measurement module 1 is used to adjust the power supply mode and sampling time interval during measurement according to the induced power measured by the inductive power acquisition module 3 to obtain the voltage and current of the circuit to be measured;

[0050] The energy storage battery 2 is used to provide power to the voltage and current measurement module 1 when the circuit under test cannot operate normally or the current is too small, resulting in a dead zone for power extraction;

[0051] The inductive power acquisition module 3 is used to obtain electrical energy from the circuit to be tested to measure the induced power corresponding to the electrical energy, and when the circuit to be tested operates normally, the electrical energy is supplied to the voltage and current measurement module 1 and the energy storage battery 2.

[0052] In a specific application, when the voltage and current measurement system is working normally, the inductive power module 3 obtains electric energy from the circuit to be measured by induction, and supplies the electric energy to the voltage and current measurement module 1 and the energy storage battery 2 at the same time. At the same time, the inductive power module 3 measures the induced power corresponding to the electric energy. The voltage and current measurement module 1 adjusts the power supply mode and sampling time interval during measurement according to the induced power to obtain the voltage and current of the circuit to be measured. For example, the relationship between the induced power and the preset safe power-taking threshold is judged. When the induced power is greater than or equal to the preset safe power-taking threshold, it is determined that the corresponding electric energy can provide the voltage and current measurement module 1 for normal operation, and the inductive power module 3 is controlled to provide electric energy to the voltage and current measurement module 1, and the sampling time interval of the voltage and current measurement module 1 is appropriately adjusted. When the induced power is less than the preset safe power-taking threshold, it is determined that the circuit to be measured is abnormal or the current is so small that it enters the power-taking dead zone, and the corresponding electric energy cannot provide the voltage and current measurement module 1 for normal operation, and the energy storage battery 2 is controlled to provide electric energy to the voltage and current measurement module 1, and the sampling time interval of the voltage and current measurement module 1 is appropriately adjusted.

[0053] When the voltage and current measurement system is operating normally, the electric energy provided by the inductive power module 3 will first meet the working requirements of the voltage and current measurement module 1, and the remaining electric energy will be used to charge the energy storage battery 2 to maintain the power of the energy storage battery 2. When an abnormality occurs in the circuit to be measured, such as a fault or a decrease in current, the power drawn by the inductive power module will decrease accordingly. When the output power of the inductive power module 3 is lower than the power required for the normal operation of the system, the energy storage battery 2 begins to discharge, providing electric energy to the voltage and current measurement module 1 to ensure the continuous operation of the voltage and current measurement module 1. Therefore, even when the circuit to be measured operates abnormally or the current is small, resulting in a decrease in the efficiency of inductive power collection, the voltage and current measurement module 1 can still rely on the energy storage battery 2 to maintain power supply, ensuring the continuity and reliability of voltage and current measurement. Among them, the energy storage battery 2 can be a rechargeable battery, such as a lithium-ion battery, for easy recycling.

[0054] The voltage and current measurement system measures voltage and current through a voltage and current measurement module 1, an energy storage battery 2, and an inductive power supply module 3. This solves the technical problem that in existing voltage and current measurement systems, when using inductive power supply, there is a small current power supply dead zone, which affects the power supply capability and causes problems in the voltage and current measurement process. The system can ensure the normal operation of the voltage and current measurement process when a power supply dead zone occurs, avoid the power supply dead zone affecting the voltage and current measurement process, and improve the voltage and current measurement efficiency.

[0055] Specifically, please refer to Figure 4 , Figure 4 This is a structural diagram of the inductive power module provided in an embodiment of the present application, wherein: Figure 4The arrow in the figure indicates the direction of current; the induction power module 3 includes an induction coil 4, a protection circuit 5, a rectifier circuit 6, a filter circuit 7 and a voltage stabilizing circuit 8 connected in sequence, and a control circuit 9 connected to the induction coil 4, the protection circuit 5, the rectifier circuit 6 and the voltage stabilizing circuit 8 respectively;

[0056] The induction coil 4 is used to obtain electrical energy from the circuit to be tested through the principle of electromagnetic induction, and is used to measure the induced power corresponding to the electrical energy;

[0057] The protection circuit 5 is used to ensure the safety of the inductive power module 3;

[0058] The rectifier circuit 6 is used to convert the AC power provided by the induction coil 4 into DC power;

[0059] The filter circuit 7 is used to filter out noise and interference in DC power;

[0060] The voltage stabilizing circuit 8 is electrically connected to the voltage and current measuring module 1 and the energy storage battery 2 respectively. The voltage stabilizing circuit 8 is used to maintain the voltage stability of the inductive power module 3;

[0061] The control circuit 9 is used to control the induction coil 4 , the protection circuit 5 , the rectifier circuit 6 and the voltage stabilizing circuit 8 .

[0062] In specific applications, the induction coil 4 can draw power from the circuit to be tested to provide electrical energy, and at the same time, it can also measure the induced power of the induction power module 3 through the obtained electrical energy. The measurement of the induced power can be completed by the control circuit 9 in conjunction with the induction coil 4. Specifically, the induction coil 4 will generate voltage and current signals during the process of induction power drawing. The control circuit 9 can collect the voltage and current signals on the induction coil 4 in real time and obtain the induced power by calculation. The value of the induced power can reflect the energy conversion efficiency and power drawing status of the induction power drawing module. By measuring the induced power through the induction coil 4, the voltage and current measurement system can obtain the energy conversion efficiency and power drawing status of the induction power drawing module 3 in real time, providing a data basis for the subsequent system to adjust the power supply mode.

[0063] After the induction coil 4 senses the alternating current from the circuit to be tested, it is first processed by the protection circuit 5 to ensure safety. Subsequently, the rectifier circuit 6 converts the alternating current into direct current. The converted direct current is filtered by the filter circuit 7 to reduce noise and interference. Finally, the voltage stabilizing circuit 8 stabilizes the voltage at a preset level, providing stable and reliable power to the voltage and current measurement module 1 and the energy storage battery 2. The control circuit 9 plays a coordinating and management role in the entire process, ensuring that the various parts of the inductive power supply module 3 work together to achieve stable power supply. Through the above structure, the inductive power supply module 3 can effectively obtain electrical energy from the circuit to be tested, and after a series of processing, it finally outputs a stable and reliable DC power supply.

[0064] Specifically, by measuring the induced power through the induction coil 4, the voltage and current measurement system can obtain the energy conversion efficiency and power supply status of the induction power supply module 3 in real time. Based on the induced power value measured by the induction coil 4, the power supply capacity of the induction power supply module 3 is judged. When the induced power is high, it indicates that the power supply capacity of the induction power supply module is sufficient to maintain the normal operation of the system; when the induced power is low, it indicates that the power supply capacity of the induction power supply module is insufficient and it is necessary to switch to other power supply methods, such as energy storage battery power supply, to ensure the stability of voltage and current measurement. Therefore, by adding the induced power measurement function through the induction coil 4, the voltage and current measurement system can manage the power supply more intelligently and improve the adaptability and reliability under different working conditions.

[0065] In some specific embodiments, the induction coil 4 can adopt a multi-layer coil structure to improve the induction efficiency. The protection circuit 5 can include overvoltage protection devices and overcurrent protection devices, such as TVS tubes and fuses, to deal with abnormal voltage and current. The rectifier circuit 6 can use a bridge rectifier circuit to achieve AC-DC conversion by using the unidirectional conductivity of the diode. The filter circuit 7 can use an LC filter circuit to filter out ripples by using the characteristics of inductance and capacitance. The voltage stabilization circuit 8 can use a linear regulator or a switching regulator, such as an LDO or a DC-DC converter, to provide a stable output voltage. The control circuit 9 can be implemented based on a microcontroller, which can monitor the induced power and adjust the working mode of the inductive power module 3 according to the induced power. Through the selection and configuration of these specific components, the efficient, stable and safe operation of the inductive power module 3 can be achieved.

[0066] Specifically, the voltage and current measurement system further includes a wireless communication module 10;

[0067] The wireless communication module 10 is used to transmit the current and voltage obtained by the voltage and current measurement module 1 , and to transmit the induced power measured by the inductive power acquisition module 3 .

[0068] In a specific application, during the operation of the power system, the induced power measured by the induction coil 4 and the voltage and current values ​​collected by the voltage and current measurement module 1 are transmitted to the wireless communication module 10. The wireless communication module 10 encodes and modulates this data and sends it through a wireless channel. After receiving this data, the remote monitoring center decodes and analyzes it, thereby achieving real-time monitoring of the operating status of the power system. For example, by analyzing the remotely transmitted induced power data, the power supply efficiency of the induction power supply module 3 can be evaluated and abnormal power supply conditions can be detected in a timely manner. By analyzing the remotely transmitted voltage and current data, the load conditions and power quality of the power lines can be understood. As a result, the operation and maintenance personnel of the power system can take timely measures to ensure the safe and stable operation of the power system. Among them, the wireless communication module 10 can adopt various wireless communication technologies, such as but not limited to Bluetooth, Wi-Fi, Zigbee, LoRa, NB-IoT, 4G, 5G, etc.

[0069] Please refer to Figure 2 , Figure 2 A voltage and current measurement method in some embodiments of the present application is applied to the aforementioned voltage and current measurement system to measure voltage and current, including:

[0070] Step S101, obtaining system parameters of a voltage and current measurement system;

[0071] Step S102, periodically obtaining the induction power collected by the induction power module;

[0072] Step S103: Based on the value of the induced power and in combination with system parameters, adjusting the power supply mode and sampling time interval of the voltage and current measurement system;

[0073] Step S104 : controlling the voltage and current measurement module to collect the voltage and current of the circuit to be measured according to the adjusted power supply mode and the adjusted sampling time interval.

[0074] The voltage and current measurement method adjusts the power supply mode and sampling time interval of the voltage and current measurement system by the numerical value of the induction power, and controls the voltage and current measurement module to collect the voltage and current of the circuit to be measured by the adjusted power supply mode and the adjusted sampling time interval. This solves the technical problem that the existing voltage and current measurement system has a small current dead zone when using induction power collection, which affects the power collection capacity and causes problems in the voltage and current measurement process. The method can ensure the normal operation of the voltage and current measurement process when the power collection dead zone occurs, avoid the power collection dead zone affecting the voltage and current measurement process, and improve the voltage and current measurement efficiency.

[0075] Specifically, in step S101, the system parameters of the voltage and current measurement system are obtained, including the capacity of the energy storage battery , Fixed frequency of voltage and current data sampling when powered by energy storage battery ( Related to the capacity of the energy storage battery), the initial interval time of voltage and current data sampling (that is, the interval time set by the default setting of the voltage and current measurement system ), the time required to complete a voltage and current sampling , and the energy required to complete a voltage and current sampling And other data.

[0076] Specifically, in step S102, the induced power collected by the inductive power acquisition module is periodically acquired according to a preset acquisition period. The value of the induced power can reflect the energy conversion efficiency and power acquisition status of the inductive power acquisition module. The preset acquisition period can be set according to actual needs and can also be set to the sampling time interval of the voltage and current measurement system.

[0077] Specifically, in step S103, based on the value of the induced power and in combination with the system parameters, the power supply mode and sampling time interval of the voltage and current measurement system are adjusted, including:

[0078] Based on the system parameters, the voltage and current sampling power of the voltage and current measurement system is calculated;

[0079] According to the relationship between the induced power and the voltage and current sampling power, the power supply mode and sampling time interval of the voltage and current measurement system are adjusted.

[0080] Specifically, in step S103, the voltage and current sampling power of the voltage and current measurement system is calculated based on the system parameters, including:

[0081] The time and energy required to complete one voltage and current sampling are extracted from the system parameters;

[0082] Based on the ratio of energy to time, the voltage and current sampling power of the voltage and current measurement system is calculated.

[0083] In step S103, the voltage and current sampling power of the voltage and current measurement system is calculated by the ratio of the energy required to complete one voltage and current sampling to the time required to complete one voltage and current sampling, wherein the voltage and current sampling power represents the power required by the voltage and current measurement system to complete the voltage and current sampling work.

[0084] Specifically, in step S103, the power supply mode and sampling time interval of the voltage and current measurement system are adjusted according to the relationship between the induced power and the voltage and current sampling power, including:

[0085] When the induction power is greater than or equal to the voltage and current sampling power, it is determined that the circuit to be tested is in a normal operating state, the induction power module is controlled to provide power to the voltage and current measurement module and the energy storage battery, and the sampling time interval of the voltage and current measurement system is adjusted to the time required to complete one voltage and current sampling;

[0086] When the induced power is less than the voltage and current sampling power, and the induced power is greater than or equal to the preset safe power-taking threshold, the inductive power-taking module is controlled to provide power to the voltage and current measurement module, and the sampling time interval of the voltage and current measurement system is adjusted to the product of the induced power and the energy required to complete one voltage and current sampling;

[0087] When the induced power is less than the preset safe power-drawing threshold, it is determined that the circuit under test is in an abnormal operating state or the current is too small, resulting in a power-drawing dead zone. The energy storage battery is controlled to provide power to the voltage and current measurement module, and the sampling time interval of the voltage and current measurement system is adjusted to the inverse of the fixed frequency of voltage and current data sampling when the energy storage battery is powered.

[0088] In step S103, the magnitude relationship between the induction power and the voltage and current sampling power is compared. When the induction power is greater than or equal to the voltage and current sampling power, it indicates that the induction power is sufficient. In this state, the control circuit starts the induction power module and supplies power to the voltage and current measurement module and the energy storage battery at the same time. In this way, the measurement module is ensured to operate continuously and the energy storage battery is charged at the same time for subsequent use. At this time, the interval time of voltage and current data sampling is set to Adjust to the time required to complete one voltage and current sampling ,Right now .

[0089] If the induced power is lower than the voltage and current sampling power but still higher than the safe power-drawing threshold, it indicates that the induced power-drawing capability is weakened but still usable. The control circuit then adjusts the power supply mode to control the induced power-drawing module to only supply power to the voltage and current measurement module. Charging of the energy storage battery is suspended to prioritize the operation of the measurement function. The voltage and current sampling time interval of the voltage and current measurement module is adjusted according to the size of the induced power. The voltage and current sampling time interval is adjusted to the product of the induced power and the energy required to complete one voltage and current sampling, that is, , The energy required to complete one voltage and current sampling is: The power consumption of the voltage and current measurement system is reduced to match the power consumption of the sensing power. The preset safe power-on threshold can be set according to actual needs. Setting the safe power-on threshold is key to ensuring safe system operation. The safe power-on threshold is the preset lower limit of the sensing power. The setting of this threshold needs to comprehensively consider factors such as the minimum stable operating power of the sensing power module, system power consumption, and environmental interference.

[0090] When the induction power is lower than the safe power-taking threshold but not equal to 0 (the induction power can be considered to be approximately equal to 0 at this time), it can be considered that the current of the circuit to be measured is very small and enters the power-taking dead zone. At this time, the induction power module can still perform induction power taking, but it cannot meet the measurement requirements of the voltage and current measurement system. It is determined that the induction power at this time is too low to provide reliable power. It is determined that the induction power taking is no longer reliable and it is necessary to switch to energy storage battery power supply. In addition, the sampling time interval of the voltage and current measurement system is adjusted to the fixed frequency of voltage and current data sampling when the energy storage battery is powered. The reciprocal of , to meet the power supply needs of energy storage batteries.

[0091] Similarly, when the circuit to be tested is in an abnormal operating state, such as when a line fault occurs, the induction power is 0. At this time, the induction power module cannot be used for induction power supply and needs to switch to the energy storage battery for power supply. When the energy storage battery is used for power supply, the sampling time interval of the voltage and current measurement system needs to be adjusted to the fixed frequency of voltage and current data sampling when the energy storage battery is used for power supply. The reciprocal of , to meet the power supply needs of energy storage batteries.

[0092] This intelligent switching mechanism, based on real-time inductive power evaluation, ensures stable and reliable operation of the voltage and current measurement system under all operating conditions of the circuit under test. The safe power-off threshold, a key parameter for switching to battery power, prevents measurement interruptions during low current or fault conditions. This solution effectively mitigates the power supply dead zone issues associated with inductive power supply, thereby improving the overall stability and reliability of the voltage and current measurement system.

[0093] In step S104, through the above-mentioned adjustment, the power supply mode and sampling frequency (i.e., sampling time interval) of the voltage and current measurement system can be flexibly adjusted under different induced powers. According to the adjusted power supply mode and the adjusted sampling time interval, the voltage and current of the circuit to be measured are collected by the voltage and current measurement module, thereby ensuring the stable operation of the system under various working conditions and the accuracy of voltage and current measurement.

[0094] From the above, it can be seen that the voltage and current measurement method obtains the system parameters of the voltage and current measurement system, periodically obtains the induced power collected by the inductive power collection module, and adjusts the power supply mode of the voltage and current measurement system based on the numerical value of the induced power and combined with the system parameters. According to the adjusted power supply mode and the adjusted sampling time interval, the voltage and current measurement module is controlled to collect the voltage and current of the circuit to be measured; thereby, the power supply mode and the sampling time interval of the voltage and current measurement system are adjusted by the numerical value of the induced power, and the voltage and current measurement module is controlled to collect the voltage and current of the circuit to be measured by the adjusted power supply mode and the adjusted sampling time interval, thereby solving the technical problem that the existing voltage and current measurement system has a small current dead zone when using inductive power collection, which affects the power collection ability and causes problems in the voltage and current measurement process. It can ensure the normal operation of the voltage and current measurement process when the power collection dead zone occurs, avoid the power collection dead zone affecting the voltage and current measurement process, and improve the voltage and current measurement efficiency.

[0095] Please refer to Figure 3 , Figure 3 This is a structural schematic diagram of an electronic device provided in an embodiment of the present application. The present application provides an electronic device, including: a processor 301 and a memory 302. The processor 301 and the memory 302 are interconnected and communicate with each other via a communication bus 303 and / or other forms of connection mechanisms (not shown). The memory 302 stores a computer program executable by the processor 301. When the electronic device is running, the processor 301 executes the computer program to perform the voltage and current measurement method in any optional implementation of the above embodiment to achieve the following functions: obtaining system parameters of the voltage and current measurement system, periodically obtaining the induced power collected by the inductive power collection module, adjusting the power supply mode and sampling time interval of the voltage and current measurement system based on the numerical value of the induced power in combination with the system parameters, and controlling the voltage and current measurement module to collect the voltage and current of the circuit to be measured according to the adjusted power supply mode and the adjusted sampling time interval.

[0096] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the voltage and current measurement method in any optional implementation of the above embodiment is executed to achieve the following functions: obtaining system parameters of a voltage and current measurement system, periodically obtaining induced power collected by an inductive power collection module, adjusting the power supply mode and sampling time interval of the voltage and current measurement system based on the numerical value of the induced power in combination with the system parameters, and controlling the voltage and current measurement module to collect the voltage and current of the circuit to be measured according to the adjusted power supply mode and the adjusted sampling time interval. The storage medium may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0097] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0098] In addition, the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, and may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the purpose of the solution of this embodiment.

[0099] Furthermore, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0100] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0101] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A voltage and current measurement system for measuring voltage and current, characterized in that: It comprises a voltage and current measurement module (1), an energy storage battery (2) and an inductive power acquisition module (3) which are electrically connected to each other; The voltage and current measurement module (1) is used to adjust the power supply mode and sampling time interval during measurement according to the induced power measured by the inductive power acquisition module (3) to obtain the voltage and current of the circuit to be measured; The energy storage battery (2) is used to provide electric energy to the voltage and current measurement module (1) when the circuit to be measured cannot operate normally or the current is too small, resulting in a dead zone for power extraction; The inductive power acquisition module (3) is used to obtain electric energy from the circuit to be tested to measure the induced power corresponding to the electric energy, and when the circuit to be tested operates normally, the electric energy is supplied to the voltage and current measurement module (1) and the energy storage battery (2); The voltage and current measurement module (1) is used to adjust the power supply mode and sampling time interval during measurement according to the induced power measured by the inductive power acquisition module (3) to obtain the voltage and current of the circuit to be measured, including: Calculating the voltage and current sampling power based on the system parameters of the voltage and current measurement system; When the induction power is greater than or equal to the voltage and current sampling power, it is determined that the circuit to be measured is in a normal operating state, the induction power module (3) is controlled to provide power to the voltage and current measurement module (1) and the energy storage battery (2), and the sampling time interval of the voltage and current measurement system is adjusted to the time required to complete one voltage and current sampling; When the induced power is less than the voltage and current sampling power, and the induced power is greater than or equal to a preset safe power-taking threshold, the induced power-taking module (3) is controlled to provide electric energy to the voltage and current measurement module (1), and the sampling time interval of the voltage and current measurement system is adjusted to the product of the induced power and the energy required to complete one voltage and current sampling; When the induced power is less than the preset safe power-drawing threshold, it is determined that the circuit to be tested is in an abnormal operating state or the current is too small to enter a power-drawing dead zone, the energy storage battery (2) is controlled to provide power to the voltage and current measurement module (1), and the sampling time interval of the voltage and current measurement system is adjusted to the inverse of the fixed frequency of the voltage and current data sampling when the energy storage battery (2) supplies power.

2. The voltage and current measurement system according to claim 1, characterized in that: The induction power module (3) comprises an induction coil (4), a protection circuit (5), a rectifier circuit (6), a filter circuit (7) and a voltage stabilizing circuit (8) connected in sequence, and a control circuit (9) connected to the induction coil (4), the protection circuit (5), the rectifier circuit (6) and the voltage stabilizing circuit (8) respectively; The induction coil (4) is used to obtain electrical energy from the circuit to be tested by electromagnetic induction principle, and is used to measure the induced power corresponding to the electrical energy; The protection circuit (5) is used to ensure the safety of the induction power module (3); The rectifier circuit (6) is used to convert the AC power provided by the induction coil (4) into DC power; The filtering circuit (7) is used to filter out noise and interference in DC power; The voltage stabilizing circuit (8) is electrically connected to the voltage and current measuring module (1) and the energy storage battery (2) respectively, and the voltage stabilizing circuit (8) is used to maintain the voltage stability of the inductive power module (3); The control circuit (9) is used to control the induction coil (4), the protection circuit (5), the rectifier circuit (6) and the voltage stabilizing circuit (8).

3. The voltage and current measurement system according to claim 2, characterized in that: The voltage and current measurement system further includes a wireless communication module (10); The wireless communication module (10) is used to transmit the current and voltage obtained by the voltage and current measurement module (1), and to transmit the induced power measured by the inductive power acquisition module (3).

4. A voltage and current measurement method, applied to the voltage and current measurement system according to any one of claims 1 to 3 to measure voltage and current, characterized in that: include: Obtaining system parameters of the voltage and current measurement system; Periodically acquiring the induction power collected by the induction power acquisition module; Based on the numerical value of the induced power and in combination with the system parameters, adjusting the power supply mode and sampling time interval of the voltage and current measurement system; According to the adjusted power supply mode and the adjusted sampling time interval, the voltage and current measurement module is controlled to collect the voltage and current of the circuit to be measured.

5. The voltage and current measurement method according to claim 4, characterized in that: Based on the numerical value of the induced power and in combination with the system parameters, adjusting the power supply mode and sampling time interval of the voltage and current measurement system includes: Based on the system parameters, the voltage and current sampling power of the voltage and current measurement system is calculated; According to the relationship between the induced power and the voltage and current sampling power, the power supply mode and sampling time interval of the voltage and current measurement system are adjusted.

6. The voltage and current measurement method according to claim 5, characterized in that: Calculating the voltage and current sampling power of the voltage and current measurement system based on the system parameters includes: Extracting the time and energy required to complete one voltage and current sampling from the system parameters; The voltage and current sampling power of the voltage and current measurement system is calculated based on the ratio of the energy to the time.

7. The voltage and current measurement method according to claim 5, characterized in that: Adjusting the power supply mode and sampling time interval of the voltage and current measurement system according to the relationship between the induced power and the voltage and current sampling power includes: When the induced power is greater than or equal to the voltage and current sampling power, it is determined that the circuit to be tested is in a normal operating state, the inductive power acquisition module is controlled to provide power to the voltage and current measurement module and the energy storage battery, and the sampling time interval of the voltage and current measurement system is adjusted to the time required to complete one voltage and current sampling; When the induced power is less than the voltage and current sampling power, and the induced power is greater than or equal to a preset safe power-taking threshold, controlling the inductive power-taking module to provide power to the voltage and current measurement module, and adjusting the sampling time interval of the voltage and current measurement system to the product of the induced power and the energy required to complete one voltage and current sampling; When the induced power is less than the preset safe power-drawing threshold, it is determined that the circuit to be tested is in an abnormal operating state or the current is too small, resulting in a power-drawing dead zone. The energy storage battery is controlled to provide power to the voltage and current measurement module, and the sampling time interval of the voltage and current measurement system is adjusted to the inverse of the fixed frequency of voltage and current data sampling when the energy storage battery is powered.

8. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, the method runs the steps of the voltage and current measurement method according to any one of claims 4 to 7.

9. 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 voltage and current measurement method according to any one of claims 4 to 7 are executed.

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