Real-time power acquisition circuit, method and system compatible with ac and dc switches

Abstract

The application relates to a real-time power acquisition circuit, method and system compatible with AC and DC switch machines, wherein the power acquisition circuit compatible with the DC switch machine and the AC switch machine is adopted to acquire voltage and current signals input by a load end through a resistance direct acquisition scheme, then the voltage and current signals are subjected to isolation and amplification through a circuit, and then subjected to analog-digital conversion by an analog-digital conversion chip, the converted digital signals are sent to a programmable logic device for filtering and data processing, and finally the processed data are transmitted to a CPU terminal maintenance device for analysis, so that the entire sampling circuit is highly integrated and miniaturized, the real-time performance of data acquisition is improved, and the precision of the acquired data is improved.

Description

Technical Field

[0001] This disclosure relates to the field of rail transit technology, and in particular to a real-time power acquisition circuit, method, system and electronic equipment compatible with AC and DC switch machines. Background Technology

[0002] DC and AC switch machines are important equipment in the interlocking system of rail transit. The maintenance and monitoring system needs to collect their operating voltage and operating current through external acquisition devices and plot the power curve for fault diagnosis and maintenance.

[0003] Currently, the data acquisition devices for DC and AC switch machines are not interchangeable, making them neither economical nor practical. For example:

[0004] Patent CN201201614Y discloses a current and power sensor for a railway turnout switch machine, while patent CN113933703A discloses a switch machine power acquisition system, method, object controller, and storage medium. Both patents are limited to AC switch machines, and both employ voltage and current transformers as their technical solutions.

[0005] The patent with publication number CN105866510A provides a monitoring system for railway outdoor trackside signal equipment. Although it can support both DC and AC switch machines, it requires two types of data acquisition devices.

[0006] The technical solutions for data acquisition devices mostly employ magnetically isolated devices such as voltage transformers, current transformers, and Hall sensors, which leads to problems such as large size of the acquisition devices, low real-time performance of the acquired data, and poor accuracy of the acquired data. Summary of the Invention

[0007] To address the aforementioned issues, this application proposes a real-time power acquisition circuit, method, system, and electronic equipment compatible with both AC and DC switch machines.

[0008] This application proposes a real-time power acquisition circuit compatible with both AC and DC switch machines, comprising:

[0009] The sampling circuit is used to acquire signals from the sampling end, convert the acquired signals into analog and digital signals, and then send them to the programmable logic device.

[0010] A programmable logic device is used to receive a digital signal obtained after analog-to-digital conversion and to filter the digital signal, and to calculate the power data of the digital signal according to the type of the acquired signal and send the power data to the terminal maintenance device.

[0011] The sampling circuit is electrically connected to the programmable logic device.

[0012] As an optional embodiment of this application, the programmable logic device may optionally perform power data calculation on the digital signal according to the type of the acquired signal, including:

[0013] When the acquired signal is an AC signal, the programmable logic unit filters the real-time sampled digital signal, performs a Fourier transform on the filtered signal, and calculates the phase difference Φ between the voltage and current; based on the power calculation formula... The final power data is calculated and then sent to the terminal maintenance equipment.

[0014] When the acquired signal is a DC signal, the programmable logic device filters the digital signal sampled in real time to obtain voltage and current data in the filtered digital signal; according to the power calculation formula P=U*I, the final power data is calculated and then sent to the terminal maintenance equipment.

[0015] As an optional embodiment of this application, the sampling circuit may optionally include:

[0016] Voltage sampling circuit loop, used for voltage signal acquisition;

[0017] The voltage sampling circuit includes: a first input terminal, a first resistor, a second resistor, a second input terminal, a first isolation operational amplifier, and a first analog-to-digital converter chip, wherein,

[0018] The first input terminal receives the signal to be sampled, and the second input terminal receives a reference signal that receives the signal to be sampled.

[0019] The first input terminal, the first resistor, the second resistor, and the second input terminal are connected in series in sequence;

[0020] The first isolation operational amplifier is connected in parallel across the second resistor;

[0021] The first isolation operational amplifier and the first analog-to-digital converter chip are connected in series, and the first analog-to-digital converter chip is connected in series with the programmable logic device.

[0022] As an optional embodiment of this application, the sampling circuit may optionally further include:

[0023] Current sampling circuit loop, used for current signal acquisition;

[0024] The current sampling circuit includes: a first input terminal, a third resistor, an output terminal, a second isolation operational amplifier, and a second analog-to-digital converter chip.

[0025] The first input terminal receives the signal to be sampled, and the output terminal is the load terminal receiving the signal to be sampled;

[0026] The first input terminal, the third resistor, and the output terminal are connected in series in sequence;

[0027] The second isolation operational amplifier is connected in parallel across the third resistor;

[0028] The second isolation operational amplifier and the second analog-to-digital converter chip are connected in series, and the second analog-to-digital converter chip is connected in series with the programmable logic device.

[0029] As an optional embodiment of this application, the number of sampling circuits may be at least one.

[0030] As an optional implementation of this application, the number of sampling circuits may not exceed three.

[0031] In another aspect, this application proposes a real-time power acquisition method compatible with both AC and DC switch machines, comprising the following steps:

[0032] Based on the real-time power acquisition circuit of the AC and DC compatible switch machine described above, voltage and current signals are acquired from the input signal to be sampled.

[0033] The acquired voltage and current signals are sent to an isolation operational amplifier for signal amplification.

[0034] The amplified signal is converted from analog to digital by an analog-to-digital converter chip to obtain a digital signal, which is then sent to the programmable logic device.

[0035] The programmable logic device receives the digital signal obtained after analog-to-digital conversion, filters the digital signal, calculates the power data of the digital signal according to the type of the acquired signal, and sends the power data to the terminal maintenance equipment.

[0036] As an optional embodiment of this application, optionally, the programmable logic device receives the digital signal obtained after analog-to-digital conversion and performs filtering processing on the digital signal, and performs power data calculation on the digital signal according to the type of the acquired signal, and sends the power data to the terminal maintenance device, including:

[0037] Based on the acquired signal, determine the type of the input signal to be sampled:

[0038] When the acquired signal is an AC signal, the programmable logic unit filters the real-time sampled digital signal, performs a Fourier transform on the filtered signal, and calculates the phase difference Φ between the voltage and current; based on the power calculation formula... The final power data is calculated and then sent to the terminal maintenance equipment.

[0039] When the acquired signal is a DC signal, the programmable logic device filters the digital signal sampled in real time to obtain voltage and current data in the filtered digital signal; according to the power calculation formula P=U*I, the final power data is calculated and then sent to the terminal maintenance equipment.

[0040] In another aspect, this application also proposes a real-time power acquisition system compatible with both AC and DC switch machines, comprising:

[0041] AC / DC input power supply;

[0042] The real-time power acquisition circuit for AC and DC compatible switch machines described above;

[0043] Switch machine drive circuit;

[0044] AC / DC switch machine;

[0045] Maintenance system;

[0046] The AC / DC input power supply, real-time power acquisition circuit, switch machine drive circuit and AC / DC switch machine are connected in sequence.

[0047] The maintenance system and the real-time power acquisition circuit are electrically connected.

[0048] In another aspect, this application also proposes an electronic device comprising:

[0049] processor;

[0050] Memory used to store processor-executable instructions;

[0051] The processor is configured to implement the real-time power acquisition method for the switch machine as described above when executing the executable instructions.

[0052] Technical effects of the present invention:

[0053] This application proposes a power acquisition circuit compatible with both DC and AC switch machines. It uses a direct resistive acquisition scheme to obtain the voltage and current signals input to the load end. The signals are then passed through an isolation amplification circuit and converted from analog to digital by an analog-to-digital converter chip. The converted digital signals are sent to a programmable logic unit for filtering and data processing. Finally, the processed data is transmitted to terminal maintenance equipment such as a CPU for analysis. This achieves a high degree of integration and miniaturization of the entire sampling circuit, while also improving the real-time performance and accuracy of the acquired data.

[0054] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0055] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this disclosure together with the specification and serve to explain the principles of this disclosure.

[0056] Figure 1 The diagram shown is a schematic layout of the power acquisition circuit of the present invention;

[0057] Figure 2 The diagram shown is a block diagram of the application circuit of the AC switch machine of the present invention;

[0058] Figure 3 The diagram shows a schematic of the power acquisition circuit system of the AC switch machine of the present invention;

[0059] Figure 4 The diagram shown is a block diagram of the application circuit of the DC switch machine of the present invention;

[0060] Figure 5 The diagram shown is a schematic of the power acquisition circuit system of the DC switch machine of the present invention. Detailed Implementation

[0061] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0062] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0063] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0064] Terminology Explanation:

[0065] Power Acquisition Circuit;

[0066] Switch machine drive circuit;

[0067] Maintenance System (Terminal Maintenance Equipment)

[0068] AC Point (Alternating Current Switch);

[0069] DC Point (DC switch machine)

[0070] Input terminal INPUT;

[0071] Output terminal OUTPUT.

[0072] This technology uses a power acquisition circuit compatible with both DC and AC switch machines. It employs a direct resistive acquisition scheme to obtain the voltage and current signals input to the load. These signals are then passed through an isolation amplification circuit and converted from analog to digital by an analog-to-digital converter chip. The converted digital signal is then sent to a programmable logic unit for filtering and data processing. Finally, the processed data is transmitted to terminal maintenance equipment such as a CPU for analysis.

[0073] In a circuit system, at least one power acquisition circuit can be configured.

[0074] Example 1

[0075] like Figure 1 As shown, this application proposes a real-time power acquisition circuit compatible with both AC and DC switch machines, comprising:

[0076] The sampling circuit is used to acquire signals from the sampling end, convert the acquired signals into analog and digital signals, and then send them to the programmable logic device.

[0077] A programmable logic device is used to receive a digital signal obtained after analog-to-digital conversion and to filter the digital signal, and to calculate the power data of the digital signal according to the type of the acquired signal and send the power data to the terminal maintenance device.

[0078] The sampling circuit is electrically connected to the programmable logic device.

[0079] Each power acquisition circuit consists of a voltage sampling circuit loop and a current sampling circuit loop, along with their respective associated isolation operational amplifiers and analog-to-digital converter chips. In the power acquisition circuit, the sampling circuit is connected to the power supply of the input signal. The voltage sampling circuit loop sends the voltage signal of the input signal to the FPGA after isolation and analog-to-digital conversion to obtain the voltage value of the signal being sampled. Similarly, the current sampling circuit loop obtains the current signal of the signal being sampled (which is actually still a voltage value, requiring conversion and calculation I=U / R), performs isolation and analog-to-digital conversion, and then sends it to the FPGA to obtain the current value of the signal being sampled. The FPGA then performs power calculations based on the processed voltage and current data. The specific calculations depend on the data type of the sampled signal.

[0080] The power calculation method of the programmable logic device (FPGA) for the sampled signal will be based on the type of the sampled signal. Therefore, the FPGA has two built-in power calculation algorithms (the program / algorithm is not limited), which can be called according to the determined sampled signal type.

[0081] As an optional embodiment of this application, the programmable logic device may optionally perform power data calculation on the digital signal according to the type of the acquired signal, including:

[0082] When the acquired signal is an AC signal, the programmable logic unit filters the real-time sampled digital signal, performs a Fourier transform on the filtered signal, and calculates the phase difference Φ between the voltage and current; based on the power calculation formula... The final power data is calculated and then sent to the terminal maintenance equipment.

[0083] When the acquired signal is a DC signal, the programmable logic device filters the digital signal sampled in real time to obtain voltage and current data in the filtered digital signal; according to the power calculation formula P=U*I, the final power data is calculated and then sent to the terminal maintenance equipment.

[0084] In this embodiment, Figure 1 Taking the first power acquisition circuit in the upper middle section as an example, this power acquisition circuit consists of a first input terminal INPUT1, a second input terminal INPUT4, an output terminal OUTPUT1, a first resistor R1, a second resistor R2, a third resistor R3, a first isolation operational amplifier Amplifier 1, a first analog-to-digital converter chip ADC1, a second isolation operational amplifier Amplifier 2, and a second analog-to-digital converter chip ADC2. The first analog-to-digital converter chip ADC1 and the second analog-to-digital converter chip ADC2 are respectively connected in series with the interface of the programmable logic device (FPGA).

[0085] As an optional embodiment of this application, the sampling circuit may optionally include:

[0086] Voltage sampling circuit loop, used for voltage signal acquisition;

[0087] The voltage sampling circuit includes: a first input terminal, a first resistor, a second resistor, a second input terminal, a first isolation operational amplifier, and a first analog-to-digital converter chip, wherein,

[0088] The first input terminal receives the signal to be sampled, and the second input terminal receives a reference signal that receives the signal to be sampled.

[0089] The first input terminal, the first resistor, the second resistor, and the second input terminal are connected in series in sequence;

[0090] The first isolation operational amplifier is connected in parallel across the second resistor;

[0091] The first isolation operational amplifier and the first analog-to-digital converter chip are connected in series, and the first analog-to-digital converter chip is connected in series with the programmable logic device.

[0092] For the specific circuit connection relationship of the voltage sampling circuit loop mentioned above, please refer to [link / reference]. Figure 1 That's it. The voltage sampling circuit loop is as follows:

[0093] The first input terminal INPUT1 is connected to the input signal to be sampled, and the first input terminal INPUT4 is connected to the reference signal of the input signal to be sampled. After the signal to be sampled passes through the voltage divider network of the first resistor R1 and the second resistor R2, the small voltage signal across the second resistor R2 is transmitted to the first isolation operational amplifier Amplifier 1. After isolation amplification, it is sampled by the first analog-to-digital converter chip ADC 1. The digitally sampled signal is then filtered by the digital signal obtained by the programmable logic device FPGA.

[0094] As an optional embodiment of this application, the sampling circuit may optionally further include:

[0095] Current sampling circuit loop, used for current signal acquisition;

[0096] The current sampling circuit includes: a first input terminal, a third resistor, an output terminal, a second isolation operational amplifier, and a second analog-to-digital converter chip.

[0097] The first input terminal receives the signal to be sampled, and the output terminal is the load terminal receiving the signal to be sampled;

[0098] The first input terminal, the third resistor, and the output terminal are connected in series in sequence;

[0099] The second isolation operational amplifier is connected in parallel across the third resistor;

[0100] The second isolation operational amplifier and the second analog-to-digital converter chip are connected in series, and the second analog-to-digital converter chip is connected in series with the programmable logic device.

[0101] For the specific circuit connection relationship of the above current sampling circuit loop, please refer to [link / reference]. Figure 1 That's it. The current sampling circuit loop is as follows:

[0102] The first input terminal OUTPUT1 receives the load of the sampling signal. When the signal to be sampled drives the load, the current flows through the series third resistor R3 in the circuit, and transmits the small voltage signal across the third resistor R3 to the second isolation operational amplifier Amplifier 2. After isolation amplification, it is sampled by the second analog-to-digital converter chip ADC 2. The digitally sampled signal is then filtered by the digital signal obtained by the programmable logic device FPGA.

[0103] When the acquired signal is an AC signal, the FPGA will filter the real-time sampled voltage and current data, perform a Fourier transform after filtering, calculate the phase difference Φ between the voltage and current, and then apply the power calculation formula. This allows us to obtain the final power data. Finally, the power data is transmitted to the terminal maintenance equipment via the EHTERNET network communication port.

[0104] When the acquired signal is a DC signal, since DC voltage and current have no phase difference, the FPGA directly processes the filtered voltage and current data according to the power calculation formula P = U * I to obtain the final power data. Finally, the power data is sent to the terminal maintenance equipment via the EHTERNET network communication port.

[0105] As an optional embodiment of this application, the number of sampling circuits may be at least one. This application may provide one sampling circuit, corresponding to one AC / DC input power supply.

[0106] As an optional implementation of this application, the number of sampling circuits may not exceed three. To ensure computing performance and power handling, the maximum number of circuits is three, such as... Figure 1 As shown, this embodiment uses three channels.

[0107] Based on the power acquisition circuit described above, this embodiment also provides a method for applying the circuit.

[0108] In another aspect, this application proposes a real-time power acquisition method compatible with both AC and DC switch machines, comprising the following steps:

[0109] Based on the real-time power acquisition circuit of the AC and DC compatible switch machine described above, voltage and current signals are acquired from the input signal to be sampled.

[0110] The acquired voltage and current signals are sent to an isolation operational amplifier for signal amplification.

[0111] The amplified signal is converted from analog to digital by an analog-to-digital converter chip to obtain a digital signal, which is then sent to the programmable logic device.

[0112] The programmable logic device receives the digital signal obtained after analog-to-digital conversion, filters the digital signal, calculates the power data of the digital signal according to the type of the acquired signal, and sends the power data to the terminal maintenance equipment.

[0113] As an optional embodiment of this application, optionally, the programmable logic device receives the digital signal obtained after analog-to-digital conversion and performs filtering processing on the digital signal, and performs power data calculation on the digital signal according to the type of the acquired signal, and sends the power data to the terminal maintenance device, including:

[0114] Based on the acquired signal, determine the type of the input signal to be sampled:

[0115] When the acquired signal is an AC signal, the programmable logic unit filters the real-time sampled digital signal, performs a Fourier transform on the filtered signal, and calculates the phase difference Φ between the voltage and current; based on the power calculation formula... The final power data is calculated and then sent to the terminal maintenance equipment.

[0116] When the acquired signal is a DC signal, the programmable logic device filters the digital signal sampled in real time to obtain voltage and current data in the filtered digital signal; according to the power calculation formula P=U*I, the final power data is calculated and then sent to the terminal maintenance equipment.

[0117] The above methods are detailed in the circuit description section and will not be repeated here.

[0118] Obviously, those skilled in the art should understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the control methods described above. The modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device, or fabricating them separately as individual integrated circuit modules, or fabricating multiple modules or steps as a single integrated circuit module. Thus, the present invention is not limited to any specific hardware and software combination.

[0119] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the control methods described above. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.

[0120] Therefore, this application uses a power acquisition circuit to sample the input signal using a direct resistance acquisition method. After passing through an isolation amplification circuit, the signal is converted from analog to digital by an analog-to-digital converter chip. The converted digital signal is then sent to a programmable logic device (FPGA) for filtering and data processing. Finally, the FPGA transmits the processed data to terminal maintenance equipment such as a CPU for analysis. This achieves a high degree of integration and miniaturization of the entire sampling circuit, while also improving the real-time performance of data acquisition and increasing the accuracy of the acquired data.

[0121] It should be noted that although the above-described method for calculating the power of an input signal is illustrated using a single power acquisition circuit as an example, those skilled in the art will understand that this disclosure is not limited thereto. In fact, users can flexibly set the number of power acquisition circuits according to their actual application scenarios, as long as the technical functions of this application can be achieved by following the above-described technical methods.

[0122] Example 2

[0123] Based on the implementation principle of Embodiment 1, this application also proposes a real-time power acquisition system compatible with both AC and DC switch machines, comprising:

[0124] AC / DC input power supply;

[0125] The real-time power acquisition circuit for AC and DC compatible switch machines described above;

[0126] Switch machine drive circuit;

[0127] AC / DC switch machine;

[0128] Maintenance system;

[0129] The AC / DC input power supply, real-time power acquisition circuit, switch machine drive circuit and AC / DC switch machine are connected in sequence.

[0130] The maintenance system and the real-time power acquisition circuit are electrically connected.

[0131] Specifically, it is divided into power acquisition for AC switch machines and power acquisition for DC switch machines, which will be described separately below.

[0132] I. Power Acquisition of AC Switch Machines

[0133] like Figure 2 The diagram shows a block diagram of an AC switch machine application circuit, including a three-phase AC power supply input of 380V, a power acquisition circuit, a switch machine drive circuit, a maintenance system (terminal maintenance equipment), and an AC point. For details regarding the power acquisition circuit, please refer to the description in Example 1.

[0134] Substitute it Figure 2 In, it is composed of, such as Figure 3 The power acquisition circuit of the AC switch machine shown includes:

[0135] Terminal INPUT1 connects to phase C of the AC380V three-phase drive power supply for the AC switch machine; AC380V C;

[0136] Terminal INPUT2 is connected to phase B of the three-phase AC380V drive power supply for the AC switch machine; AC380V B;

[0137] Terminal INPUT3 connects to phase A of the three-phase AC380V drive power supply for the AC switch machine; AC380V A;

[0138] Terminals INPUT4, INPUT5, and INPUT6 are connected to the neutral wire N of the three-phase AC380V drive power supply for the AC switch machine; AC380VN.

[0139] Terminals OUTPUT1, OUTPUT2, and OUTPUT3 are connected to the switch machine drive circuit.

[0140] The communication port ETHERNET connects to the Maintenance System.

[0141] II. Power Acquisition of DC Switch Machines

[0142] like Figure 4The diagram shows the application circuit block diagram of a DC switch machine, which includes the input of a DC 220V power supply, a power acquisition circuit, a drive circuit, a maintenance system (terminal maintenance equipment), and a DC point.

[0143] Will Figure 1 Substitute the power acquisition circuit into Figure 4 , constitute as Figure 5 The power acquisition circuit of the DC switch machine shown includes:

[0144] Terminal INPUT1 connects to the DC 220V positive and DC 220V positive power supply for the DC switch machine drive.

[0145] Terminal INPUT2 is left floating;

[0146] Terminal INPUT3 is left floating;

[0147] Terminal INPUT4 connects to the DC 220V negative and DC 220V negative power supply for the DC switch machine drive.

[0148] Terminal OUTPUT1 is connected to the switch machine drive circuit;

[0149] The communication port ETHERNET connects to the Maintenance System.

[0150] For the power calculation of the AC / DC switch machine described above, please refer to the application principle in Example 1.

[0151] The above design has the following advantages:

[0152] The circuit components are highly integrated, resulting in a small overall size and easy installation.

[0153] The interface is compatible with the circuit interfaces of existing DC and AC switch machines, facilitating maintenance and upgrades;

[0154] High-speed real-time sampling results in more accurate data.

[0155] Example 3

[0156] Furthermore, in another aspect, this application also proposes an electronic device comprising:

[0157] processor;

[0158] Memory used to store processor-executable instructions;

[0159] The processor is configured to implement the real-time power acquisition method for the switch machine as described above when executing the executable instructions.

[0160] This disclosure discloses an electronic device including a processor and a memory for storing processor-executable instructions. The processor is configured to implement, when executing the executable instructions, a real-time power acquisition circuit for a compatible AC and DC switch machine as described above.

[0161] It should be noted here that the number of processors can be one or more. Furthermore, the electronic device in this embodiment may also include input devices and output devices. The processor, memory, input devices, and output devices can be connected via a bus or other means, without specific limitations herein.

[0162] As a computer-readable storage medium, the memory can be used to store software programs, computer-executable programs, and various modules, such as the program or module corresponding to a real-time power acquisition circuit compatible with AC and DC switch machines according to an embodiment of this disclosure. The processor executes various functional applications and data processing of the electronic device by running the software programs or modules stored in the memory.

[0163] Input devices can be used to receive input digital numbers or signals. These signals can be key signals related to user settings and function control of the device / terminal / server. Output devices can include display devices such as screens.

[0164] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A real-time power acquisition circuit compatible with both AC and DC switch machines, characterized in that, include: The sampling circuit is used to acquire signals from the sampling end, convert the acquired signals into analog and digital signals, and then send them to the programmable logic device. The sampling circuit includes: Voltage sampling circuit loop, used for voltage signal acquisition; The voltage sampling circuit includes: a first input terminal, a first resistor, a second resistor, a second input terminal, a first isolation operational amplifier, and a first analog-to-digital converter chip, wherein, The first input terminal receives the signal to be sampled, and the second input terminal receives a reference signal that receives the signal to be sampled. The first input terminal, the first resistor, the second resistor, and the second input terminal are connected in series in sequence; The first isolation operational amplifier is connected in parallel across the second resistor; The first isolation operational amplifier and the first analog-to-digital converter chip are connected in series, and the first analog-to-digital converter chip is connected in series with the programmable logic device. Current sampling circuit loop, used for current signal acquisition; The current sampling circuit includes: a first input terminal, a third resistor, an output terminal, a second isolation operational amplifier, and a second analog-to-digital converter chip. The first input terminal receives the signal to be sampled, and the output terminal is the load terminal receiving the signal to be sampled; The first input terminal, the third resistor, and the output terminal are connected in series in sequence; The second isolation operational amplifier is connected in parallel across the third resistor; The second isolation operational amplifier and the second analog-to-digital converter chip are connected in series, and the second analog-to-digital converter chip is connected in series with the programmable logic device. A programmable logic controller (PLC) is configured to receive a digital signal obtained through analog-to-digital conversion, filter the digital signal, calculate power data of the digital signal according to the type of the acquired signal, and send the power data to a terminal maintenance device, comprising: When the acquired signal is an AC signal, the programmable logic unit filters the real-time sampled digital signal, performs a Fourier transform on the filtered signal, and calculates the phase difference Φ between the voltage and current; based on the power calculation formula... The final power data is calculated and then sent to the terminal maintenance equipment. When the acquired signal is a DC signal, the programmable logic unit filters the digital signal sampled in real time to obtain voltage and current data from the filtered digital signal; based on the power calculation formula... The final power data is calculated and then sent to the terminal maintenance equipment. The sampling circuit is electrically connected to the programmable logic device.

2. The real-time power acquisition circuit for AC and DC compatible switch machines according to claim 1, characterized in that, The number of sampling circuits is at least one.

3. The real-time power acquisition circuit for AC and DC compatible switch machines according to claim 1, characterized in that, The number of sampling circuits shall not exceed three.

4. A real-time power acquisition method compatible with both AC and DC switch machines, characterized in that, Includes the following steps: The real-time power acquisition circuit based on any one of claims 1-3, which is compatible with AC and DC switch machines, acquires voltage and current signals from the input signal to be sampled. The acquired voltage and current signals are sent to an isolation operational amplifier for signal amplification. The amplified signal is converted from analog to digital by an analog-to-digital converter chip to obtain a digital signal, which is then sent to the programmable logic device. The programmable logic device receives the digital signal obtained after analog-to-digital conversion, filters the digital signal, calculates the power data of the digital signal according to the type of the acquired signal, and sends the power data to the terminal maintenance equipment.

5. The real-time power acquisition method for compatible AC and DC switch machines according to claim 4, characterized in that, The programmable logic controller receives a digital signal obtained after analog-to-digital conversion, filters the digital signal, calculates power data of the digital signal according to the type of the acquired signal, and sends the power data to the terminal maintenance equipment, including: Based on the acquired signal, determine the type of the input signal to be sampled: When the acquired signal is an AC signal, the programmable logic unit filters the real-time sampled digital signal, performs a Fourier transform on the filtered signal, and calculates the phase difference Φ between the voltage and current; based on the power calculation formula... The final power data is calculated and then sent to the terminal maintenance equipment. When the acquired signal is a DC signal, the programmable logic unit filters the digital signal sampled in real time to obtain voltage and current data from the filtered digital signal; based on the power calculation formula... The final power data is calculated and then sent to the terminal maintenance equipment.

6. A real-time power acquisition system compatible with both AC and DC switch machines, characterized in that, include: AC / DC input power supply; Real-time power acquisition circuit for a compatible AC and DC switch machine as described in any one of claims 1-3; Switch machine drive circuit; AC / DC switch machine; Maintenance system; The AC / DC input power supply, real-time power acquisition circuit, switch machine drive circuit and AC / DC switch machine are connected in sequence. The maintenance system and the real-time power acquisition circuit are electrically connected.

7. An electronic device, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured to implement the real-time power acquisition method for switch machines as described in any one of claims 4-5 when executing the executable instructions.

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