Voltage signal conversion device, method and electronic device

Abstract

The present disclosure provides a voltage signal conversion device, method and electronic equipment, and relates to the technical field of anti-interference processing of industrial equipment analog voltage signals. A differential signal is output through an input circuit, the differential signal is electrically isolated through an isolation circuit, the current signal after isolation is amplified through an amplification circuit, and finally the analog voltage signal is converted into a digital frequency signal through a conversion circuit, forming a complete signal processing link. Therefore, the problems of complex anti-interference scheme, high cost and poor anti-interference effect in the prior art can be solved, and the technical effects of effectively reducing the internal and external electromagnetic interference of the voltage signal in the industrial equipment, reducing the technical implementation cost, and improving the signal transmission reliability are achieved.

Description

Technical Field

[0001] This disclosure relates to the field of anti-interference processing technology for analog voltage signals of industrial equipment, and in particular to a voltage signal conversion device, method and electronic device. Background Technology

[0002] In industrial automation scenarios with high electromagnetic interference, such as coal mines, metallurgy, and chemical industries, analog voltage signals are the core carrier for process control and sensor data acquisition. Traditional anti-interference solutions work together with multi-layer shielding, multi-stage filtering circuits, and isolation transformers, adopting a "voltage-to-current conversion followed by isolation" architecture to cover the entire process from signal acquisition and transmission to processing.

[0003] However, the existing solutions have obvious shortcomings: they do not fundamentally block the propagation path of electromagnetic interference; in industrial environments, electromagnetic fields of 500V / m level can easily cause common-mode noise to be superimposed on 0-10V DC voltage signals; the combination of multi-stage filtering and isolation transformers is bulky, and the cost of isolation transformers accounts for more than 40%, which is expensive; at the same time, there is a 1.6μs level response delay, which is difficult to meet the real-time control requirements; in addition, thermal noise during signal amplification and time constant matching problems of integration circuits further aggravate signal distortion, resulting in a high rate of false triggering accidents, which can no longer meet the development needs of intelligent and high-density integration of industrial equipment. Summary of the Invention

[0004] This disclosure provides a voltage signal conversion device, method, and electronic device. Its main objective is to at least partially solve one of the technical problems in the related art.

[0005] According to a first aspect of this disclosure, a voltage signal conversion device is provided, comprising: an input circuit, an isolation circuit, an amplification circuit, and a conversion circuit;

[0006] The input circuit is configured to receive an input analog voltage signal and output a differential signal; The input terminal of the isolation circuit is electrically connected to the output terminal of the input circuit, and is configured to receive the differential signal and perform electrical isolation, and output the isolated current signal; The input terminal of the amplifier circuit is electrically connected to the output terminal of the isolation circuit, and is configured to amplify the isolated current signal to generate an analog voltage signal; The input terminal of the conversion circuit is electrically connected to the output terminal of the amplifier circuit, and is configured to convert the analog voltage signal into a digital frequency signal.

[0007] According to a second aspect of this disclosure, a voltage signal conversion method is provided, comprising: Receives input analog voltage signals; The analog voltage signal is converted into a differential signal; The differential signal is electrically isolated by photoelectric conversion to generate an isolated current signal; The isolated current signal is amplified to generate an amplified analog voltage signal; The amplified analog voltage signal is subjected to signal conditioning processing; and The analog voltage signal after signal conditioning is converted into a digital frequency signal.

[0008] According to a third aspect of this disclosure, an electronic device is provided, comprising: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method described in the first aspect above.

[0009] According to a fourth aspect of this disclosure, a non-transitory computer-readable storage medium is provided storing computer instructions, wherein the computer instructions are configured to cause the computer to perform the method described in the first aspect above.

[0010] According to a fifth aspect of this disclosure, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the method described in the first aspect above.

[0011] The voltage signal conversion device, method, and electronic equipment provided in this disclosure output a differential signal through an input circuit, electrically isolate the differential signal through an isolation circuit, amplify the isolated current signal through an amplifier circuit, and finally convert the analog voltage signal into a digital frequency signal through a conversion circuit, forming a complete signal processing link. Therefore, it can solve the problems of complex anti-interference schemes, high costs, and poor anti-interference effects in the prior art, and achieve the technical effects of effectively reducing internal and external electromagnetic interference to voltage signals in industrial equipment, reducing technical implementation costs, and improving signal transmission reliability.

[0012] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0013] The accompanying drawings are provided to better understand this solution and do not constitute a limitation of this disclosure. Wherein: Figure 1 This is a schematic diagram of the structure of a voltage signal conversion device provided in an embodiment of the present disclosure; Figure 2This is a schematic diagram of another voltage signal conversion device provided in an embodiment of the present disclosure; Figure 3 A schematic flowchart illustrating a voltage signal conversion method provided in an embodiment of this disclosure; Figure 4 A schematic block diagram of an example electronic device provided for embodiments of this disclosure. Detailed Implementation

[0014] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0015] The voltage signal conversion apparatus, method, and electronic device of this disclosure are described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of a voltage signal conversion device provided in an embodiment of the present disclosure.

[0017] like Figure 1 As shown, the device includes: an input circuit 11, an isolation circuit 12, an amplifier circuit 13, and a conversion circuit 14; The input circuit 11 is configured to receive the input analog voltage signal and output a differential signal.

[0018] In the embodiments of this disclosure, the input circuit 11 serves as the signal access and preprocessing core of the voltage signal conversion device. Its core function is to receive analog voltage signals transmitted in industrial scenarios and convert the single-channel analog voltage signal into a differential signal through built-in signal conversion logic before outputting it. The differential signal, due to its common-mode interference suppression characteristics, can effectively reduce the impact of environmental noise on the analog voltage signal during initial transmission, providing a more stable and less interference-prone signal source for the subsequent electrical isolation processing of the isolation circuit, ensuring the initial signal quality of the entire signal processing link. As one implementation, the input circuit can be composed of passive electronic components arranged in a preset topology. Through basic signal conditioning methods such as voltage division, current limiting, and voltage regulation, it converts the input single-channel analog voltage signal (e.g., 0~10V DC analog voltage signal) into dual-channel symmetrical differential signals to meet the differential input interface requirements of the subsequent isolation circuit.

[0019] The input circuit 11 converts the analog voltage signal into a differential signal output, which can significantly suppress common-mode interference during transmission, improve the purity of the initial signal, lay the foundation for the stable operation of subsequent circuit modules, and thus help the entire voltage signal conversion device achieve the technical effects of strong anti-interference capability and reliable signal transmission.

[0020] The input terminal of the isolation circuit 12 is electrically connected to the output terminal of the input circuit 11, and is configured to receive the differential signal and perform electrical isolation, and output the isolated current signal.

[0021] In the embodiments of this disclosure, the isolation circuit 12 serves as the core module for anti-interference in the voltage signal conversion device. Its input terminal is electrically connected to the output terminal of the input circuit 11 to receive the differential signal output by the input circuit 11. The differential signal is then electrically isolated using a preset isolation mechanism, ultimately outputting an isolated current signal. The core principle of electrical isolation is to block the direct electrical connection path between the input and output sides, preventing interference signals from being transmitted between the two circuits. The differential signal input format further adapts to the signal requirements of the isolation process, improving the stability and accuracy of the isolation process. As one implementation method, the isolation circuit can be constructed using a photoelectric conversion isolation device (referred to as "optical coupler"). Electrical isolation between input and output is achieved through electrical → optical → electrical signal conversion. After receiving the differential signal, it drives the light-emitting element to operate, and then the photosensitive element converts the optical signal into a current signal for output, completing the coordinated operation of isolation and signal conversion.

[0022] The isolation circuit 12 electrically isolates the differential signal and outputs a current signal, which can fundamentally block the interference propagation path between the input and output sides, effectively shielding electromagnetic interference in the industrial environment. At the same time, the current signal has stronger anti-interference capability, providing a stable and reliable signal foundation for subsequent amplification circuit processing, thereby improving the anti-interference performance and operational reliability of the entire voltage signal conversion device.

[0023] The input terminal of the amplifier circuit 13 is electrically connected to the output terminal of the isolation circuit 12, and is configured to amplify the isolated current signal to generate an analog voltage signal.

[0024] In the embodiments of this disclosure, the amplifier circuit 13, as a key module for signal conditioning in the voltage signal conversion device, establishes an electrical connection between its input terminal and the output terminal of the isolation circuit 12. It receives the isolated current signal output by the isolation circuit 12 and performs amplitude enhancement processing on this current signal through a built-in signal amplification mechanism, ultimately generating an analog voltage signal that meets the requirements of subsequent conversion. This amplification process must ensure the linearity of the signal to avoid introducing additional distortion. Simultaneously, it can adapt to the signal amplitude requirements under different scenarios through a preset amplification factor, ensuring that the processed analog voltage signal has sufficient strength and stability to meet the input signal specifications of the conversion circuit. As one implementation, this amplifier circuit can be constructed using an electronic amplifier circuit. By linearly amplifying and optimizing the isolated current signal, it generates an analog voltage signal with appropriate amplitude, providing a high-quality signal foundation for subsequent digital frequency conversion.

[0025] The amplifier circuit 13 accurately amplifies the isolated current signal and generates an analog voltage signal, which effectively improves the signal amplitude and signal-to-noise ratio, avoids subsequent conversion errors caused by weak signals, provides a highly adaptable signal source for the stable operation of the conversion circuit, and thus enhances the signal processing accuracy and operational reliability of the entire voltage signal conversion device.

[0026] The input terminal of the conversion circuit 14 is electrically connected to the output terminal of the amplifier circuit 13, and is configured to convert the analog voltage signal into a digital frequency signal.

[0027] In the embodiments of this disclosure, the conversion circuit 14 serves as the core module for signal digitization in the voltage signal conversion device. Its input terminal is electrically connected to the output terminal of the amplifier circuit 13. It receives the analog voltage signal output by the amplifier circuit 13 and converts it into a digital frequency signal through a built-in signal conversion mechanism. Compared to analog voltage signals, digital frequency signals have stronger anti-interference capabilities and stability in industrial environments during transmission and subsequent processing. They can adapt to the signal processing requirements of the control unit, enabling accurate signal identification and computation. As one implementation, the conversion circuit can be composed of an integrator circuit and an oscillator circuit. First, the integrator circuit integrates and conditions the analog voltage signal, and then the oscillator circuit converts the conditioned signal into a digital signal of the corresponding frequency, completing the full conversion from analog signal to digital frequency signal.

[0028] The conversion circuit 14 converts analog voltage signals into digital frequency signals, which significantly improves the anti-interference capability of the signal in subsequent transmission and processing, making it easier for the control unit to process accurately. At the same time, in conjunction with the isolation and amplification processing of the preceding circuit, it further ensures the signal processing accuracy and operational reliability of the entire voltage signal conversion device, effectively adapting to the usage requirements of industrial scenarios.

[0029] The voltage signal conversion device provided in this disclosure outputs a differential signal through an input circuit, performs electrical isolation on the differential signal through an isolation circuit, amplifies the isolated current signal through an amplifier circuit, and finally converts the analog voltage signal into a digital frequency signal through a conversion circuit, forming a complete signal processing link. Therefore, it can solve the problems of complex anti-interference schemes, high costs and poor anti-interference effects in the prior art, and achieve the technical effects of effectively reducing internal and external electromagnetic interference to voltage signals in industrial equipment, reducing technical implementation costs and improving signal transmission reliability.

[0030] As a specific embodiment of this disclosure, based on the basic scheme, the input circuit 11 is further defined to include a voltage divider unit 111 and a voltage regulator unit 112; the voltage divider unit 111 is configured to convert the input analog voltage signal into a differential signal pair, and the voltage regulator unit 112 is connected to the voltage divider unit 111 and configured to regulate the differential signal pair and output it to the isolation circuit 12.

[0031] Specifically, such as Figure 2 As shown, the voltage divider unit 111 of the input circuit 11 is composed of resistors R71, R68 and R74 connected according to a preset topology. One end of resistor R71 is directly connected to the input 0~10V analog voltage signal, and the other end is grounded. Through the principle of resistor voltage division, the single analog voltage signal is accurately converted into a dual-channel symmetrical differential signal pair of VCCP and VCCN. The voltage regulator unit 112 uses capacitor C79, and its two ends are respectively connected to the transmission lines of the differential signal pair VCCP and VCCN output by the voltage divider unit 111. The common terminal of capacitor C79 is grounded. After the differential signal pair output by the voltage divider unit 111 is current-limited by resistors R68 and R74, it flows through capacitor C79 of the voltage regulator unit 112. Through the energy storage and filtering characteristics of the capacitor, the instantaneous voltage fluctuation and high-frequency noise in the differential signal pair are filtered out, so that the signal amplitude remains stable. Finally, the normalized differential signal pair is output to the differential input terminal of the isolation circuit 12.

[0032] The voltage divider unit achieves precise conversion from analog voltage signals to differential signal pairs. Combined with the voltage regulator unit to filter out signal noise and fluctuations, it not only ensures the symmetry and amplitude adaptability of the differential signal, but also significantly improves the purity of the input signal. This provides a high-quality signal input for the efficient electrical isolation of the subsequent isolation circuit, further strengthening the basic guarantee for the anti-interference performance of the entire device.

[0033] As a specific embodiment of this disclosure, based on the basic scheme, the isolation circuit 12 is further defined to include an optocoupler, wherein the light-emitting side circuit of the optocoupler constitutes its input terminal and the photosensitive side circuit constitutes its output terminal.

[0034] Specifically, the optocoupler used in isolation circuit 12 consists of a light-emitting part, a receiving part, and a signal amplification part. The light-emitting side circuit is its input terminal, specifically composed of a built-in light-emitting diode (LED) and matching terminals. This input terminal is electrically connected to the output terminal of input circuit 11 to receive the differential signal after voltage regulation. The photosensitive side circuit is its output terminal, composed of a built-in photosensitive device and a signal amplification sub-circuit. Its output terminal is electrically connected to the input terminal of subsequent amplification circuit 13. During operation, the input differential signal is applied to the light-emitting side circuit of the optocoupler, driving the LED chip to emit light. Upon receiving this light, the photosensitive device generates a corresponding current. This current is processed by the signal amplification sub-circuit in the photosensitive side circuit to form a stable current signal, which is output from the output terminal. Through this electrical-to-optical-to-electrical conversion process, electrical isolation between the input and output circuits is achieved. Furthermore, the optocoupler has an isolation withstand voltage greater than 1000V, a bandwidth of 200kHz, and a fast response time of 1.6μs.

[0035] By selecting a specific model of optocoupler and clarifying the circuit configuration and connection relationship between its light-emitting side and photosensitive side, not only can reliable electrical isolation be achieved to block the propagation path of electromagnetic interference, but also the high withstand voltage, wide bandwidth and fast response characteristics of the optocoupler ensure the accuracy and real-time performance of signal transmission, further improving the working stability of the entire device in industrial strong interference environments.

[0036] As a specific embodiment of this disclosure, based on the basic scheme, the optocoupler is further defined as a linear optocoupler with differential input and differential output structures.

[0037] Specifically, the linear optocoupler used in the isolation circuit 12 is an ACPL-C790 device. This device inherently features a differential input and differential output design. Its differential input terminal is connected to the differential signal pair (VCCP and VCCN) output from the input circuit 11, while its differential output terminal is directly electrically connected to the input terminal of the amplifier circuit 13. This linear optocoupler integrates a matching light-emitting device and a photosensitive device, and through its built-in signal amplification and linear correction sub-circuit, it ensures good linear transmission characteristics during the electrical-to-optical-to-electrical conversion process. During operation, the input differential signal is applied to its differential input terminal, driving the light-emitting device to emit a light signal linearly corresponding to the signal amplitude. The photosensitive device receives this light signal and generates a linearly correlated current signal. After processing by the internal signal amplification sub-circuit, a stable linear current signal is output through the differential output terminal. Simultaneously, this device has an isolation withstand voltage greater than 1000V, a bandwidth of 200kHz, and a fast response time of 1.6μs, making it suitable for signal transmission requirements in industrial scenarios.

[0038] By employing a linear optocoupler with differential input and differential output structures, the electrical isolation between the input and output sides is further enhanced, effectively suppressing common-mode interference. Furthermore, its linear transmission characteristics avoid nonlinear distortion during signal conversion, ensuring the accuracy of signal amplitude. Combined with the device's high bandwidth and fast response performance, the signal processing accuracy and real-time performance of the entire device are further improved.

[0039] As a specific embodiment of this disclosure, based on the basic scheme, the conversion circuit 14 is further defined to include an integration unit 141 and an oscillation unit 142 connected in sequence; the integration unit 141 is configured to perform an integration operation on the analog voltage signal, and the oscillation unit 142 is configured to convert the integrated signal into the digital frequency signal.

[0040] Specifically, such as Figure 2 As shown, the integration unit 141 of the conversion circuit 14 adopts an active integration circuit structure built with an operational amplifier. Its input terminal is electrically connected to the output terminal of the amplifier circuit 13. It is used to receive the amplified analog voltage signal and perform linear integration on the analog voltage signal through the integration principle of capacitor charging and discharging. This filters out high-frequency components in the signal and converts the voltage amplitude change into a smooth integrated output signal. The oscillation unit 142 is a voltage-controlled oscillator (VCO). Its input terminal is connected in series with the output terminal of the integration unit 141. The integrated signal is used as the control voltage input to the VCO. The VCO generates a periodic digital signal with a corresponding frequency according to the amplitude change of the input control voltage. This periodic digital signal is the digital frequency signal that meets the processing requirements of the control unit. Finally, it is output to the control unit from the output terminal of the oscillation unit 142.

[0041] By using an integrator to smooth and integrate the analog voltage signal, high-frequency noise and amplitude fluctuations in the signal are effectively suppressed. In conjunction with an oscillation unit, the integrated signal is accurately converted into a digital frequency signal. This not only ensures the linearity and accuracy of the analog-to-digital frequency signal conversion, but also further improves the signal's anti-interference capability, ensuring that the control unit can stably receive high-quality digital frequency signals and enhancing the signal processing reliability of the entire device.

[0042] As a specific embodiment of this disclosure, based on the basic scheme, the embodiment of this disclosure further includes: a filter circuit 15; the filter circuit 15 is disposed between the amplifier circuit 13 and the conversion circuit 14, and is configured to filter the analog voltage signal.

[0043] Specifically, the filter circuit 15 adopts an RC low-pass filter topology. Its input terminal is directly electrically connected to the output terminal of the amplifier circuit 13, and its output terminal is connected to the input terminal of the conversion circuit 14 (specifically, the input terminal of the integrator unit 141), precisely positioned on the signal transmission path between the amplifier circuit 13 and the conversion circuit 14. The filter circuit 15 consists of a fixed resistor and a filter capacitor matched with preset parameters. The fixed resistor is connected in series on the main signal transmission path, and one end of the filter capacitor is connected to the node between the resistor and the conversion circuit 14, while the other end is grounded, forming a complete filter loop. During operation, the analog voltage signal amplified by the amplifier circuit 13 flows through the filter circuit 15. Through the current-limiting effect of the fixed resistor and the energy storage and filtering characteristics of the filter capacitor, thermal noise, high-frequency clutter, and instantaneous voltage spikes introduced during the amplification process are effectively attenuated and filtered out. Only low-frequency components matching the useful signal frequency are allowed to pass smoothly, ultimately outputting a regular and clean analog voltage signal to the conversion circuit 14.

[0044] By adding a filter circuit between the amplifier circuit and the conversion circuit, the analog voltage signal is further purified, effectively eliminating various interference components introduced during the amplification process. This provides a more stable signal foundation for the integration operation and digital frequency conversion of the subsequent conversion circuit, significantly reducing the risk of distortion during signal conversion and further improving the signal processing accuracy and operational reliability of the entire voltage signal conversion device.

[0045] As a specific embodiment of this disclosure, based on the basic scheme, the filter circuit 15 is further defined as a low-pass filter circuit 15, and its cutoff frequency is configured to be lower than a preset ratio of the signal bandwidth of the isolation circuit 12.

[0046] Specifically, the filter circuit 15 is an RC low-pass filter circuit, which is constructed by precisely matching the parameters of a fixed resistor R and a filter capacitor C. Its input terminal is electrically connected to the output terminal of the amplifier circuit 13, and its output terminal is connected to the input terminal of the integration unit 141 of the conversion circuit 14. It is deployed in the signal transmission path between the amplifier circuit 13 and the conversion circuit 14. Considering the 200kHz signal bandwidth of the optocoupler used in the isolation circuit 12, the cutoff frequency of this low-pass filter circuit is configured to be less than 1 / 4 of this signal bandwidth (i.e., the preset ratio is set to 1 / 4). Based on parameter calculations, the resistance value of resistor R is selected as 10kΩ and the capacitance value of capacitor C as 3.9nF. Using the low-pass filter cutoff frequency formula f_c=1 / (2πRC), its cutoff frequency is approximately 4kHz, far lower than the 200kHz signal bandwidth of the isolation circuit. During operation, the amplified analog voltage signal flows through the low-pass filter circuit. High-frequency interference signals with frequencies higher than 4kHz (such as thermal noise introduced during the amplification process and high-frequency electromagnetic noise in the industrial environment) are effectively attenuated, while useful analog voltage signals with frequencies within the isolation circuit signal bandwidth pass smoothly, and finally a clean signal is output to the conversion circuit 14.

[0047] By precisely configuring the cutoff frequency of the low-pass filter circuit to a preset ratio of the isolation circuit signal bandwidth, high-frequency interference components can be filtered out in a targeted manner, while ensuring the distortion-free transmission of useful analog voltage signals. This avoids the suppression of effective signals during the filtering process, providing a high-fidelity signal source for subsequent integration operations and digital frequency conversion, and further improving the signal processing accuracy and anti-interference stability of the entire device.

[0048] As a specific embodiment of this disclosure, based on the basic scheme, the frequency of the digital frequency signal is further defined to be proportional to the amplitude of the input analog voltage signal.

[0049] Specifically, the frequency of the digital frequency signal maintains a linear proportional relationship with the amplitude of the input analog voltage signal. This proportionality is achieved through the coordinated operation of the integrator 141 and the oscillation unit 142 in the conversion circuit 14. After receiving the analog voltage signal output from the amplifier circuit 13, the integrator 141 performs linear integration, and the amplitude of the output integrated voltage is proportional to the amplitude of the input analog voltage signal. The oscillation unit 142 uses a voltage-controlled oscillator (VCO), whose oscillation frequency has a preset linear correspondence with the amplitude of the input integrated voltage. That is, when the amplitude of the integrated voltage increases with the amplitude of the input analog voltage signal, the oscillation frequency of the VCO increases synchronously, and vice versa. For example, when the amplitude of the input 0~10V analog voltage signal is 5V, the integrated control voltage drives the VCO to output a digital frequency signal of the corresponding frequency. When the amplitude of the analog voltage signal rises to 10V, the frequency of the digital frequency signal increases exactly to twice that of 5V, ensuring that the frequency of the digital frequency signal and the amplitude of the input analog voltage signal always maintain a stable proportional relationship.

[0050] By making the frequency of the digital frequency signal proportional to the amplitude of the input analog voltage signal, the control unit can directly deduce the amplitude information of the original analog voltage signal by recognizing the frequency of the digital frequency signal. This eliminates the need for complex decoding calculations, simplifies the subsequent signal processing flow, and ensures the accuracy of amplitude restoration. This further enhances the practicality and measurement accuracy of the entire device in industrial control scenarios.

[0051] Figure 3 This is a schematic flowchart of a voltage signal conversion method provided in an embodiment of the present disclosure, as shown below. Figure 3 As shown, it includes: Step 201: Receive the input analog voltage signal.

[0052] Step 202: Convert the analog voltage signal into a differential signal.

[0053] Step 203: Electrically isolate the differential signal through photoelectric conversion to generate an isolated current signal.

[0054] Step 204: Amplify the isolated current signal to generate an amplified analog voltage signal.

[0055] Step 205: Perform signal conditioning processing on the amplified analog voltage signal.

[0056] Step 206: Convert the analog voltage signal after signal conditioning into a digital frequency signal.

[0057] Specifically, in steps 201 to 206, analog voltage signals generated by sensors or process control in industrial equipment are received. The voltage range of these analog voltage signals is 0~10V, serving as the raw input signal for subsequent signal processing. Through an input circuit composed of resistors R68, R71, R74, and capacitor C79, the single-channel analog voltage signal is first converted into a dual-channel differential signal pair (VCCP and VCCN) by resistor R71. Then, the signal is current-limited by resistors R68 and R74 and voltage-regulated by capacitor C79, outputting a stable differential signal. In step 203, an ACPL-C790 optocoupler (referred to as "optocoupler") is used to achieve electrical isolation. The differential signal is applied to the differential input terminal of the optocoupler, driving the built-in light-emitting device to emit light. The photosensitive device receives the light and generates a corresponding current. After processing by the internal signal amplification sub-circuit of the optocoupler, an isolated current signal is output. This process, through an electrical-to-optical-to-electrical conversion, blocks the direct electrical connection between the input and output sides. Step 204 uses a linear amplifier circuit to boost the amplitude of the isolated current signal, ensuring sufficient signal strength and maintaining linearity to generate an amplified analog voltage signal suitable for subsequent processing. Step 205 involves signal conditioning, specifically low-pass filtering using an RC low-pass filter circuit (10kΩ resistor, 3.9nF capacitor) with a cutoff frequency of approximately 4kHz (less than 1 / 4 of the optocoupler's 200kHz bandwidth), filtering out thermal noise and high-frequency electromagnetic interference introduced during amplification. In step 206, the filtered analog voltage signal is first linearly integrated by an integrator, and then the integrated signal is input to an oscillation unit composed of a voltage-controlled oscillator (VCO). A digital frequency signal with a corresponding frequency is generated based on the input voltage amplitude, and the frequency of the digital frequency signal is linearly proportional to the amplitude of the original analog voltage signal.

[0058] By implementing signal conversion, isolation, amplification, regulation, and digital processing in stages, combined with specific device parameters and topology design, the propagation path of electromagnetic interference is blocked at the source, effectively filtering out various types of noise, ensuring the linearity and purity of signal transmission, while reducing the implementation cost of anti-interference solutions, and significantly improving the reliability and accuracy of voltage signal conversion in industrial scenarios.

[0059] It should be noted that the embodiments of this disclosure may include multiple steps. For ease of description, these steps are numbered, but these numbers are not a limitation on the execution time slots or execution order between the steps; these steps can be implemented in any order, and the embodiments of this disclosure do not limit this.

[0060] According to embodiments of this disclosure, this disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0061] Figure 4A schematic block diagram of an example electronic device 300 that can be used to implement embodiments of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0062] like Figure 4 As shown, the electronic device 300 includes a computing unit 301, which can perform various appropriate actions and processes based on a computer program stored in ROM (Read-Only Memory) 302 or a computer program loaded from storage unit 308 into RAM (Random Access Memory) 303. The RAM 303 may also store various programs and data required for the operation of the electronic device 300. The computing unit 301, ROM 302, and RAM 303 are interconnected via a bus 304. An I / O (Input / Output) interface 305 is also connected to the bus 304.

[0063] Multiple components in electronic device 300 are connected to I / O interface 305, including: input unit 306, such as keyboard, mouse, etc.; output unit 307, such as various types of displays, speakers, etc.; storage unit 308, such as disk, optical disk, etc.; and communication unit 309, such as network card, modem, wireless transceiver, etc. Communication unit 309 allows electronic device 300 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0064] The computing unit 301 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 301 include, but are not limited to, CPUs (Central Processing Units), GPUs (Graphics Processing Units), various special-purpose AI (Artificial Intelligence) computing chips, various computing units running machine learning model algorithms, DSPs (Digital Signal Processors), and any suitable processor, controller, microcontroller, etc. The computing unit 301 performs the various methods and processes described above, such as voltage signal conversion methods. For example, in some embodiments, the voltage signal conversion method may be implemented as a computer software program tangibly contained in a machine-readable medium, such as storage unit 308. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 300 via ROM 302 and / or communication unit 309. When the computer program is loaded into RAM 303 and executed by the computing unit 301, one or more steps of the methods described above may be performed. Alternatively, in other embodiments, the computing unit 301 may be configured to perform the aforementioned voltage signal conversion method by any other suitable means (e.g., by means of firmware).

[0065] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, FPGAs (Field Programmable Gate Arrays), ASICs (Application-Specific Integrated Circuits), ASSPs (Application-Specific Standard Products), SOCs (System-on-Chips), CPLDs (Complex Programmable Logic Devices), computer hardware, firmware, software, and / or combinations thereof. These various implementations may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0066] The program code used to implement the methods of this disclosure may be written in any combination of one or more programming languages. This program code may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor or controller, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0067] In the context of this disclosure, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, RAM, ROM, EPROM (Electrically Programmable Read-Only Memory) or flash memory, optical fiber, CD-ROM (Compact Disc Read-Only Memory), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0068] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user (e.g., a CRT (Cathode-Ray Tube) or LCD (Liquid Crystal Display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0069] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include LANs (Local Area Networks), WANs (Wide Area Networks), the Internet, and blockchain networks.

[0070] Computer systems can include clients and servers. Clients and servers are generally geographically separated and typically interact via communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. A server can be a cloud server, also known as a cloud computing server or cloud host, a hosting product within the cloud computing service system that addresses the shortcomings of traditional physical hosts and VPS (Virtual Private Server) services, such as high management difficulty and weak business scalability. Servers can also be servers for distributed systems or servers incorporating blockchain technology.

[0071] It's important to note that artificial intelligence (AI) is the study of enabling computers to simulate certain human thought processes and intelligent behaviors (such as learning, reasoning, thinking, and planning). It encompasses both hardware and software technologies. AI hardware technologies generally include sensors, dedicated AI chips, cloud computing, distributed storage, and big data processing. AI software technologies primarily include computer vision, speech recognition, natural language processing, machine learning / deep learning, big data processing, and knowledge graph technologies.

[0072] The various numerical designations such as "first," "second," etc., used in this disclosure are merely for ease of description and are not intended to limit the scope of the embodiments of this disclosure, nor do they indicate a sequential order.

[0073] At least one of the features described in this disclosure can also be described as one or more, and multiple features can be two, three, four or more, and this disclosure does not impose any limitations. In the embodiments of this disclosure, for a technical feature, the technical features in that technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no sequential order or size order among the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0074] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0075] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A voltage signal conversion device, characterized in that, include: Input circuit, isolation circuit, amplifier circuit, conversion circuit; The input circuit is configured to receive an input analog voltage signal and output a differential signal; The input terminal of the isolation circuit is electrically connected to the output terminal of the input circuit, and is configured to receive the differential signal and perform electrical isolation, and output the isolated current signal; The input terminal of the amplifier circuit is electrically connected to the output terminal of the isolation circuit, and is configured to amplify the isolated current signal to generate an analog voltage signal; The input terminal of the conversion circuit is electrically connected to the output terminal of the amplifier circuit, and is configured to convert the analog voltage signal into a digital frequency signal.

2. The apparatus according to claim 1, characterized in that, The input circuit includes a voltage divider unit and a voltage regulator unit; The voltage divider unit is configured to convert the input analog voltage signal into a differential signal pair. The voltage regulator unit is connected to the voltage divider unit and is configured to regulate the differential signal pair before outputting it to the isolation circuit.

3. The apparatus according to claim 1, characterized in that, The isolation circuit includes an optocoupler, with the light-emitting side circuit of the optocoupler forming its input terminal and the photosensitive side circuit forming its output terminal.

4. The apparatus according to claim 3, characterized in that, The optocoupler is a linear optocoupler with differential input and differential output structures.

5. The apparatus according to claim 1, characterized in that, The conversion circuit includes an integration unit and an oscillation unit connected in sequence; The integration unit is configured to perform an integration operation on the analog voltage signal, and the oscillation unit is configured to convert the integrated signal into the digital frequency signal.

6. The apparatus according to claim 1, characterized in that, Also includes: Filtering circuit; The filtering circuit is disposed between the amplification circuit and the conversion circuit, and is configured to filter the analog voltage signal.

7. The apparatus according to claim 6, characterized in that, The filtering circuit is a low-pass filter circuit, and its cutoff frequency is configured to be lower than a preset ratio of the signal bandwidth of the isolation circuit.

8. The apparatus according to claim 1, characterized in that, The frequency of the digital frequency signal is proportional to the amplitude of the input analog voltage signal.

9. A voltage signal conversion method, characterized in that, include: Receives input analog voltage signals; The analog voltage signal is converted into a differential signal; The differential signal is electrically isolated by photoelectric conversion to generate an isolated current signal; The isolated current signal is amplified to generate an amplified analog voltage signal; The amplified analog voltage signal is subjected to signal conditioning processing; as well as The analog voltage signal after signal conditioning is converted into a digital frequency signal.

10. An electronic device, characterized in that, include: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of claim 9.

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