Signal processing device and method, digital oscilloscope

Abstract

Signal Processing Apparatus and Method, Digital Oscilloscope, The signal processing apparatus is configured to output one of two types of target signals based on a trigger signal and a trigger level, and includes a trigger comparison unit (100) configured to extract a low-frequency component signal of the trigger signal, a controller (200) electrically connected to the trigger comparison unit (100) and configured to generate a trigger comparison signal based on the relationship between the low-frequency component signal and the trigger signal, and output one of the target signals obtained based on the trigger comparison signal according to a preset, and a trigger display unit (500) electrically connected to the controller (200) and configured to receive the target signal and display it on a target interaction interface.

Description

[Technical Field]

[0001] This application claims priority from Chinese Patent Application No. 202310196210.1, filed with the China Patent Office on March 3, 2023, the entire contents of which are incorporated herein by reference. The present disclosure relates to the field of electronic circuit technology, such as signal processing devices and methods, digital oscilloscopes, and the like. [Background technology]

[0002] As electronic devices become more complex, there is a demand for diverse tools for recording, analyzing, and visualizing measurement statistics such as waveform data. Oscilloscopes, widely used electronic measuring instruments, convert electrical signals into waveform images, facilitating the analysis of various electrical signal fluctuations. Triggering is a core function of oscilloscopes, and most conventional digital oscilloscopes employ digital triggering, allowing trigger signal processing and trigger method extensions to be performed digitally. To ensure more stable and reliable captured and output waveforms, digital oscilloscopes can filter noise and prevent false triggering by setting specific coupling modes according to the signal characteristics under the trigger.

[0003] When the captured signal contains low-frequency interference, such as 50 Hz power frequency interference in power supply ripple, causing digital oscilloscope trigger instability, the low-frequency suppression mode of the digital oscilloscope's trigger function is typically used. When a digital oscilloscope's trigger function uses low-frequency suppression or AC trigger coupling mode, the waveform sampled by the digital circuit passes through a digital low-pass filter, suppressing low-frequency components and retaining high-frequency components. After the trigger signal passes through the filter, the low-frequency signal is suppressed. Furthermore, the trigger level setting does not correspond to the actual trigger signal, resulting in a discrepancy between the sampled waveform displayed on the oscilloscope interface and the pulse voltage set by the user. This means that when adjusting the trigger level, users cannot intuitively observe relevant information about the actual trigger signal, such as the peak information of the actual trigger signal, which suppresses low-frequency signals. As a result, users adjust the trigger level blindly, resulting in reduced accuracy. Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a signal processing device and method, a digital oscilloscope. [Means for solving the problem]

[0005] One aspect of the present disclosure provides a signal processing device including: a trigger comparison unit configured to output one of two types of target signals based on a trigger signal and a trigger level, and configured to extract a low-frequency component signal of the trigger signal; a controller electrically connected to the trigger comparison unit and configured to generate a trigger comparison signal based on a relationship between the low-frequency component signal and the trigger signal, and output one of the target signals obtained based on the trigger comparison signal according to a preset including comparing the trigger comparison signal with the trigger level; and a trigger display unit electrically connected to the controller and configured to receive the target signal and display it on a target interaction interface.

[0006] Another aspect of the present disclosure provides a digital oscilloscope including the signal processing device according to any one of the above embodiments.

[0007] Another aspect of the present disclosure is a signal processing method for outputting one of two types of target signals based on a trigger signal and a trigger level, the method comprising: extracting a low-frequency component signal of the trigger signal; generating a trigger comparison signal based on a relationship between the low-frequency component signal and the trigger signal; comparing the trigger comparison signal with a trigger level according to a preset; outputting one target signal obtained based on the trigger comparison signal; receiving the target signal and displaying it on a target interaction interface; A signal processing method is provided, including: [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a principle schematic diagram of a signal processing device according to an embodiment of the present disclosure; [Figure 2] FIG. 10 is a principle schematic diagram of another signal processing device according to an embodiment of the present disclosure. [Figure 3] FIG. 10 is a principle schematic diagram of another signal processing device according to an embodiment of the present disclosure. [Figure 4]FIG. 10 is a principle schematic diagram of another signal processing device according to an embodiment of the present disclosure. [Figure 5] FIG. 2 is a schematic graph of a target signal according to an embodiment of the present disclosure. [Figure 6] FIG. 10 is a principle schematic diagram of another signal processing device according to an embodiment of the present disclosure. [Figure 7] 1 is a principle schematic diagram of a waveform display unit according to an embodiment of the present disclosure; [Figure 8] 1 is a schematic flow diagram of a signal processing method according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present disclosure will now be described with reference to the accompanying drawings, in which embodiments of the disclosure are illustrated, but which can be embodied in many different forms.

[0010] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains.The terms used herein in describing this disclosure are only used for the purpose of describing specific embodiments and are not intended to limit this disclosure.As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0011] As used herein, the singular forms "a," "an," and "the" can also include the plural forms unless the context clearly dictates otherwise. It should also be understood that when the terms "consisting of" and / or "including" are used herein, they may specify the presence of certain features, integers, steps, operations, elements, and / or groups, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, and / or groups. The term "and / or," as used herein, also includes any and all combinations of the associated listed items.

[0012] The drawings provided in this embodiment merely show the basic concepts of the present disclosure in a schematic manner, and show only the components related to the present disclosure. They are not drawn to match the number, shape, and size of the components when actually implemented. When actually implemented, the aspects, number, and proportions of multiple components may be changed arbitrarily, and the layout of the components may become more complex.

[0013] In this specification, terms such as "first" and "second" may be used to describe various components, but these components should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first element can be referred to as a second element, and similarly, a second element can be referred to as a first element, without departing from the scope of the present disclosure.

[0014] In this disclosure, unless otherwise specified or limited, terms such as "coupled," "connected," and the like shall be broadly understood as, for example, a direct connection or an indirect connection through an intermediate medium, or an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art will be able to understand the meaning of the above terms in this disclosure depending on the context.

[0015] Referring to Figure 1, a conventional analog oscilloscope uses analog circuits such as an oscilloscope tube. Electrons are fired from the electron gun of the oscilloscope tube onto a screen, which is then focused to form an electron beam. The electron beam then strikes a screen coated with a fluorescent material on its inner surface, emitting light from the spot where the electron beam hits, creating a waveform. Digital storage oscilloscopes (DSOs) are also called digital oscilloscopes, and use an analog-to-digital converter to convert test signals into digital information, store the digital information, and reconstruct waveform signals using the stored digital information, which are then displayed on the oscilloscope screen. Without special settings, an oscilloscope captures signals at a fixed frequency and generates waveforms. However, because the sampling frequency and the signal fluctuation frequency do not perfectly match, the waveforms generated by the oscilloscope when capturing signals will always vary. To ensure a stable waveform display, a "trigger event" (e.g., a level, i.e., trigger level) is usually set to synchronize the oscilloscope's scanning frequency with the signal fluctuation frequency. That is, when the oscilloscope detects a target event in the signal flow such that the captured signal is equal to or greater than the trigger level, the comparator in the oscilloscope's trigger module outputs a high level, allowing the oscilloscope to begin scanning and display the waveform. To ensure a more stable and reliable captured and output waveform, digital oscilloscopes can filter out noise and prevent false triggering by setting a specific coupling mode according to the signal characteristics under the trigger.

[0016] When the captured signal contains low-frequency interference, such as 50 Hz power frequency interference in power supply ripple, causing the digital oscilloscope trigger to become unstable, the low-frequency suppression mode of the digital oscilloscope's trigger function is typically used. However, when using a digital oscilloscope, if the trigger function is set to low-frequency suppression mode or AC trigger coupling mode, the waveform sampled by the digital circuit passes through a digital low-pass filter, suppressing low-frequency components and retaining high-frequency components. Therefore, the trigger level setting does not correspond to the actual trigger signal, and therefore the sampled waveform displayed on the oscilloscope interface will be out of sync with the pulse voltage set by the user. As a result, when adjusting the trigger level, users cannot intuitively observe relevant information about the actual trigger signal, such as the peak information of the actual trigger signal with low-frequency signals suppressed.

[0017] Based on this, the present disclosure provides a signal processing device and method, and a digital oscilloscope, which, at least when the trigger function of a digital oscilloscope adopts a low-frequency suppression mode or an AC trigger coupling mode, correct the deviation between the trigger level and the trigger signal, establish a correspondence between the trigger level setting and the actual trigger signal, enable display in the interaction interface, allow the user to intuitively observe the relevant information of the actual trigger signal after the low-frequency signal is suppressed, facilitate the user to adjust the trigger level, and improve the accuracy of the trigger level setting.

[0018] Referring to FIG. 2, according to some embodiments, there is provided a signal processing device configured to output one of two types of target signals based on a trigger signal and a trigger level, the signal processing device including: a trigger comparison unit 100 configured to extract a low-frequency component signal of the trigger signal; a controller 200 electrically connected to the trigger comparison unit 100 and configured to generate a trigger comparison signal based on a relationship between the low-frequency component signal and the trigger signal, and output one of the target signals obtained based on the trigger comparison signal according to a preset including comparing the trigger comparison signal with a trigger level; and a trigger display unit 500 electrically connected to the controller and configured to receive the target signal and display it on a target interaction interface.

[0019] Continuing to refer to FIG. 2 , the signal processing device of the above embodiment extracts a low-frequency component signal of the trigger signal, for example, a low-frequency component signal containing a DC signal, and generates a trigger comparison signal based on the relationship between the low-frequency component signal and the trigger signal. That is, an actual trigger signal with its low-frequency signal suppressed is obtained, and a target signal is output, which includes information related to the actual trigger signal with its low-frequency signal suppressed, based on the trigger comparison signal. Therefore, when the trigger function of the digital oscilloscope adopts the low-frequency suppression mode or the AC trigger coupling mode, the corresponding relationship between the trigger level setting and the actual trigger signal is established, the deviation between the trigger level and the trigger signal is corrected, and the target signal is displayed on the interaction interface, allowing the user to intuitively observe information related to the actual trigger signal with its low-frequency signal suppressed. This facilitates the user to adjust the trigger level based on the information related to the actual trigger signal, and improves the accuracy of the trigger level setting.

[0020] Still referring to FIG. 2, in some embodiments, the trigger comparison signal is a signal obtained by filtering low frequency component signals from the trigger signal, thereby converting the trigger comparison signal into a high frequency AC signal.

[0021] In some embodiments, the trigger comparison unit 100 comprises a digital filter capable of obtaining the magnitude of the instantaneous DC component by using arithmetic statistical averaging to extract the low-frequency component signal of the trigger signal. The digital filter may include a finite impulse response (FIR) filter or an infinite impulse response (IIR) filter. For example, the digital filter may use an FIR filter, also known as a non-recursive filter, as the most basic component of a digital signal processing system. This ensures both a strictly linear phase frequency characteristic and an arbitrary amplitude frequency characteristic. At the same time, since its unit sample response is finite, the FIR filter is a stable system and is widely used in fields such as communications, image processing, and pattern recognition.

[0022] Referring to FIG. 3 , in some embodiments, the signal processing device further includes a delay unit 300 electrically connected to the controller 200 and configured to compensate for the delay of the trigger comparison unit 100 so that the low-frequency component signal moves in the time dimension together with the trigger signal. For example, when the time dimension of the low-frequency component signal and the trigger signal is set horizontally, the movement of the low-frequency component signal and the trigger signal in the time dimension is regarded as the low-frequency component signal and the trigger signal moving in the horizontal direction, and the low-frequency component signal is aligned with the trigger signal in the time dimension to facilitate subsequent signal processing and user observation.

[0023] 4 and 5 , in some embodiments, the controller 200 is further configured to acquire a peak signal of the trigger comparison signal. By acquiring the peak signal of the trigger comparison signal, the target signal includes the peak signal of the actual trigger signal with its low-frequency signal suppressed. Therefore, when the trigger function of the digital oscilloscope adopts the low-frequency suppression mode or the AC trigger coupling mode, a correspondence relationship between the trigger level setting and the actual trigger signal can be established, and the deviation between the trigger level and the trigger signal can be corrected. The peak signal of the trigger comparison signal can be displayed on the interaction interface, allowing the user to intuitively observe the peak signal of the actual trigger signal with its low-frequency signal suppressed. This facilitates the user to adjust the trigger level based on the relevant information of the actual trigger signal and improves the accuracy of the trigger level setting. Furthermore, by acquiring the peak signal of the trigger comparison signal, the amplitude range of the trigger comparison signal can be determined without processing the entire trigger comparison signal. This simplifies the implementation, reduces the amount of signal processing data in the controller 200, and improves the signal processing efficiency of the signal processing device.

[0024] In some embodiments, the preset rule includes: if the value corresponding to the amplitude of the trigger comparison signal is smaller than the value corresponding to the amplitude of the trigger level, the digital oscilloscope stops the trigger function; the trigger display unit displays the target signal on the target interaction interface, including a peak signal and an initial waveform; the initial waveform includes at least one trigger waveform, for example, multiple trigger waveforms with different phases displayed sequentially on the target interaction interface; the user adjusts the trigger level based on the target signal displayed on the target interaction interface to improve the accuracy of the trigger level setting; if the value corresponding to the amplitude of the trigger comparison signal is equal to or greater than the value corresponding to the amplitude of the trigger level, the digital oscilloscope realizes the trigger function, i.e., captures a trigger waveform from the initial waveform; and the trigger display unit displays the target signal on the target interaction interface, including the peak signal and the trigger waveform, allowing the user to intuitively observe the trigger waveform displayed on the target interaction interface and related information about the trigger comparison signal, i.e., the actual trigger signal with the low-frequency signal suppressed. In some embodiments, the trigger signal may be generated based on the initial waveform. In this embodiment, the value corresponding to the signal amplitude is the absolute value of the signal amplitude.

[0025] Continuing to refer to FIGS. 4 and 5, in some embodiments, when the peak signal of the trigger comparison signal includes a maximum value Vmax and / or a minimum value Vmin of the trigger comparison signal, the amplitude range of the trigger comparison signal is from the maximum value Vmax of the trigger comparison signal to the minimum value Vmin of the trigger comparison signal, thereby establishing a correspondence relationship between the trigger level and the maximum value Vmax and / or the minimum value Vmin of the trigger comparison signal, and the target signal is displayed on the user interface in the form of an image, and the trigger comparison signal shown in FIG. 5 is not displayed on the user interface, but the maximum value Vmax and / or the minimum value Vmin of the trigger comparison signal are displayed on the user interface, so that the user can intuitively observe the peak signal. Only the minimum value Vmin of the trigger comparison signal is displayed and serves as the basis for setting the trigger level; therefore, the trigger level is set between the maximum value Vmax and the minimum value Vmin of the trigger comparison signal, which makes it easier to realize the trigger function of the oscilloscope. In some embodiments, the setting range of the trigger level includes 0.5Vmax to 0.8Vmax, or 0.5Vmin to 0.8Vmin. For example, by setting the trigger level to 0.5Vmax, 0.6Vmax, 0.7Vmax, 0.8Vmax, 0.5Vmin, 0.6Vmin, 0.7Vmin, or 0.8Vmin, the trigger function of the oscilloscope can be reliably realized.

[0026] Referring to FIG. 6, in some embodiments, the signal processing device further includes an analog-to-digital converter 400 having an output terminal connected to the input terminal of the trigger comparison unit 100 and the input terminal of the delay unit 300, and configured to convert the trigger signal from an analog quantity to a digital quantity.

[0027] Referring to FIG. 7, in some embodiments, the controller 200 is configured to generate a trigger comparison signal, and the trigger indication unit 500 is configured to output and display a target signal.The trigger display unit 500 includes a waveform processing unit 501, a waveform drawing unit 502, a trigger interpolation unit 503, a trigger drawing unit 504 and a waveform display unit 505. The input terminal of the waveform processing unit 501 is connected to the analog-to-digital converter 400 and the controller 200, and receives the trigger position and trigger level pulse output from the controller 200 and the trigger signal output via the analog-to-digital converter 400, and outputs the waveform signal to be drawn. The input terminal of the waveform drawing unit 502 is connected to the output terminal of the waveform processing unit 501, and the output terminal is connected to the waveform display unit 505, and receives the waveform signal to be drawn and outputs the waveform signal to be displayed. The trigger interpolation unit 503 has an input terminal connected to the output terminal of the controller 200 and an output terminal connected to the input terminal of the trigger drawing unit 504, and is configured to perform high-precision triggering for the trigger comparison signal output from the controller 200 and output the trigger waveform signal to be drawn, thereby realizing a higher equivalent sampling rate. High-precision triggering means sampling This refers to the fact that when the number of sampling points is less than the number of pixels of the display interface, the original data needs to be interpolated, and threshold comparison and trigger position processing need to be performed on the interpolated data to more accurately determine the interpolated point where the trigger position is. For example, if the original sampling rate is 10 GSa / s and the interval between sampling points is 100 ps, ​​if the interpolation magnification is 100 times, the equivalent sampling rate will be improved by 100 times, and the trigger resolution will also be improved by 100 times, so that the trigger processing will be performed with a resolution of 1 ps. The trigger drawing unit 504 has an output terminal connected to the waveform display unit 505, which is configured to receive the trigger waveform signal to be drawn and output the trigger waveform signal to be displayed. The waveform display unit 505 is configured to display the target signal on the target interaction interface, so that the user can more intuitively observe the relevant information of the actual trigger signal with low-frequency signals suppressed. This facilitates the user to adjust the trigger level and improves the setting accuracy of the trigger level.In some embodiments, the display module of the waveform display unit 505 may use a field programmable gate array (FPGA) or a central processing unit / processor (CPU) for display processing. For example, processing using an FPGA provides faster display speeds, while processing using a CPU provides more flexible display formats. In some embodiments, the waveform display unit 505 may display a floating screen or a split screen. For example, in the case of a split screen display, the split screen may be understood as displaying the waveform signal to be displayed in the upper half of the screen and the trigger waveform signal to be displayed in the lower half of the screen, or the displays of the upper and lower half of the screen may be swapped. For example, in the case of a floating screen display, the floating screen display may be understood as a display window for the trigger waveform signal to be displayed floating above the display window for the waveform signal to be displayed. Switching between the above two display modes can be achieved by switching the configuration window, selecting a configuration in the menu of the signal processing device, or switching a shortcut icon on the user interface, thereby improving the user's interaction experience.

[0028] According to some embodiments, another aspect of the present disclosure provides a digital oscilloscope including the signal processing device according to any one of the above embodiments.

[0029] In the digital oscilloscope of the above embodiment, a low-frequency component signal of the trigger signal, for example, a low-frequency component signal containing a DC signal, is extracted, and a trigger comparison signal is generated based on the relationship between the low-frequency component signal and the trigger signal, that is, an actual trigger signal with the low-frequency signal suppressed is obtained. Furthermore, a target signal containing information related to the actual trigger signal with the low-frequency signal suppressed, which is obtained based on the trigger comparison signal, is output. Therefore, when the trigger function of the digital oscilloscope adopts the low-frequency suppression mode or the AC trigger coupling mode, a correspondence relationship between the trigger level setting and the actual trigger signal is established, and the deviation between the trigger level and the trigger signal is corrected. The target signal containing the trigger comparison signal is displayed on the interaction interface, allowing the user to intuitively observe the actual trigger signal with the low-frequency signal suppressed. This facilitates the user to adjust the trigger level based on the information related to the actual trigger signal, thereby improving the accuracy of the trigger level setting.

[0030] Referring to FIG. 8, according to some embodiments, there is provided a signal processing method for outputting one of two target signals based on a trigger signal and a trigger level, the method comprising:

[0031] Step S10: extracting a low frequency component signal of the trigger signal;

[0032] Step S20: generating a trigger comparison signal based on the relationship between the low-frequency component signal and the trigger signal, and outputting one target signal obtained based on the trigger comparison signal according to a preset including comparing the trigger comparison signal with a trigger level;

[0033] S30: receiving one of the target signals and displaying it on the target interaction interface; A signal processing method is provided, including:

[0034] Continuing to refer to FIG. 8 , in steps S10 and S20 of the signal processing method of the above embodiment, a trigger comparison signal is generated based on the relationship between the low-frequency component signal and the trigger signal, i.e., an actual trigger signal with its low-frequency component signal suppressed is obtained, and a target signal containing relevant information of the actual trigger signal with its low-frequency component signal suppressed, which is obtained based on the trigger comparison signal, is output. Therefore, when the trigger function of the digital oscilloscope adopts the low-frequency suppression mode or the AC trigger coupling mode, a corresponding relationship between the trigger level setting and the actual trigger signal is established, the deviation between the trigger level and the trigger signal is corrected, and the target signal containing the trigger comparison signal is displayed on the interaction interface, allowing the user to intuitively observe the actual trigger signal with its low-frequency component signal suppressed. This facilitates the user to adjust the trigger level based on the relevant information of the actual trigger signal, thereby improving the accuracy of the trigger level setting.

[0035] Although the steps in the flowchart of Figure 8 are shown in a sequential order, as indicated by the arrows, the steps are not necessarily performed in the order indicated by the arrows. Unless explicitly stated herein, the execution of the steps is not limited to a strict order, and the steps may be performed in other orders. Furthermore, at least some of the steps in Figure 8 may include multiple sub-steps or multiple stages, but these sub-steps or stages may not necessarily be performed at the same time but may be performed at different times, and the execution of these sub-steps or stages may not necessarily be sequential but may be performed in order or alternating with other steps or at least some of the sub-steps or stages of other steps.

[0036] The trigger comparison signal is a signal obtained by filtering the low frequency component signal from the trigger signal, and therefore the trigger comparison signal is converted into a high frequency AC signal.

[0037] In some embodiments, the trigger comparison signal is a signal obtained by filtering low frequency component signals from the trigger signal, thereby converting the trigger comparison signal into a high frequency AC signal.

[0038] 2 and 8, in some embodiments, the trigger comparison unit 100 comprises a digital filter that can obtain the magnitude of the instantaneous DC component by using arithmetic statistical averaging to extract the low-frequency component signal of the trigger signal. The digital filter may include an FIR or an IIR filter. For example, the digital filter may use an FIR filter, also known as a non-recursive filter, as the most basic component of a digital signal processing system. This allows the digital filter to have a strictly linear phase frequency characteristic while ensuring arbitrary amplitude frequency characteristics. At the same time, since its unit sample response is finite, the FIR filter is a stable system and is widely used in fields such as communications, image processing, and pattern recognition.

[0039] 3 and 8, in some embodiments, the signal processing device further includes a delay unit 300 electrically connected to the controller 200, and the above signal processing method further includes compensating for the delay of the trigger comparison unit 100 so that the low-frequency component signal moves together with the trigger signal in the time dimension. For example, when the time dimension of the low-frequency component signal and the trigger signal is set horizontally, the movement of the low-frequency component signal and the trigger signal in the time dimension is regarded as the low-frequency component signal and the trigger signal moving horizontally, and the low-frequency component signal is aligned with the trigger signal in the time dimension to facilitate subsequent signal processing and user observation.

[0040] 4, 5, and 8, in some embodiments, the signal processing method further includes acquiring a peak signal of the trigger comparison signal. By acquiring the peak signal of the trigger comparison signal, the target signal includes the peak signal of the actual trigger signal with its low-frequency signal suppressed. Therefore, when the trigger function of the digital oscilloscope is in the low-frequency suppression mode or the AC trigger coupling mode, a correspondence relationship between the trigger level setting and the actual trigger signal can be established, and the deviation between the trigger level and the trigger signal can be corrected. The peak signal of the trigger comparison signal can be displayed on the interaction interface, allowing the user to intuitively observe the peak signal of the actual trigger signal with its low-frequency signal suppressed. This facilitates the user to adjust the trigger level based on the relevant information of the actual trigger signal, and improves the accuracy of the trigger level setting. Furthermore, by acquiring the peak signal of the trigger comparison signal, the amplitude range of the trigger comparison signal can be determined without processing the entire trigger comparison signal. This simplifies the implementation, reduces the amount of signal processing data in the controller 200, and improves the signal processing efficiency of the signal processing device.

[0041] In some embodiments, the preset rule includes: if the value corresponding to the amplitude of the trigger comparison signal is smaller than the value corresponding to the amplitude of the trigger level, the digital oscilloscope stops the trigger function; the trigger display unit displays the target signal on the target interaction interface, including a peak signal and an initial waveform; the initial waveform includes at least one trigger waveform, for example, multiple trigger waveforms with different phases displayed sequentially on the target interaction interface; the user adjusts the trigger level based on the target signal displayed on the target interaction interface to improve the accuracy of the trigger level setting; if the value corresponding to the amplitude of the trigger comparison signal is equal to or greater than the value corresponding to the amplitude of the trigger level, the digital oscilloscope realizes the trigger function, i.e., captures a trigger waveform from the initial waveform; and the trigger display unit displays the target signal on the target interaction interface, including the peak signal and the trigger waveform, allowing the user to intuitively observe the trigger waveform displayed on the target interaction interface and related information about the trigger comparison signal, i.e., the actual trigger signal with the low-frequency signal suppressed. In some embodiments, the trigger signal may be generated based on the initial waveform. In this embodiment, the value corresponding to the signal amplitude is the absolute value of the signal amplitude.

[0042] Continuing to refer to FIGS. 4, 5 and 8, in some embodiments, when the peak signal of the trigger comparison signal includes a maximum value Vmax of the trigger comparison signal and / or a minimum value Vmin of the trigger comparison signal, the amplitude range of the trigger comparison signal is from the maximum value Vmax of the trigger comparison signal to the minimum value Vmin of the trigger comparison signal, thereby establishing a correspondence relationship between the trigger level and the maximum value Vmax and / or minimum value Vmin of the trigger comparison signal, and the target signal is displayed on the user interface in the form of an image, and the trigger comparison signal shown in FIG. 5 is not displayed on the user interface, but only the maximum value Vmax and minimum value Vmin of the trigger comparison signal are displayed on the user interface, so that the user can intuitively observe the peak signal. Only the maximum value Vmax of the trigger comparison signal and / or the minimum value Vmin of the trigger comparison signal are displayed, and the trigger level is set between the maximum value Vmax of the trigger comparison signal and the minimum value Vmin of the trigger comparison signal to serve as a reference for setting the trigger level, which makes it easier to realize the trigger function of the oscilloscope. In some embodiments, the setting range of the trigger level includes 0.5Vmax to 0.8Vmax, or 0.5Vmin to 0.8Vmin. For example, by setting the trigger level to 0.5Vmax, 0.6Vmax, 0.7Vmax, 0.8Vmax, 0.5Vmin, 0.6Vmin, 0.7Vmin, or 0.8Vmin, the trigger function of the oscilloscope can be reliably realized.

[0043] Referring to Figures 6 and 8, in some embodiments, the signal processing device further includes an analog-to-digital converter 400 having an output terminal connected to the input terminal of the trigger comparison unit 100 and the input terminal of the delay unit 300, and the above signal processing method further includes converting the trigger signal from an analog quantity to a digital quantity. [Industrial Applicability]

[0044] According to the above implementation scheme, it is obvious to those skilled in the art that the present application can be realized with the aid of software and necessary general-purpose hardware, or by hardware. Based on this knowledge, the technical solution of the present application can essentially be embodied in the form of a software product, which is stored in a computer-readable storage medium such as a computer floppy disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (FLASH), a hard disk or an optical disk, and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform the methods described in the embodiments of the present application.

[0045] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be executed by instructing relevant hardware through a computer program, which can be stored in a non-volatile computer-readable storage medium and, when executed, can include the processes of the above-described method embodiments. Here, any reference to memory, storage, database, or other medium used in the embodiments provided in the present disclosure may include non-volatile memory and / or volatile memory.

[0046] The above embodiments are provided for illustrative purposes only.

[0047] The multiple embodiments in this specification are described in a progressive manner, with each embodiment focusing on differences from other embodiments, and the same or similar parts of each embodiment are referred to as the other embodiments.

[0048] The technical features of the above-described embodiments can be combined in any manner, and all possible combinations thereof are not listed here for ease of explanation, but should be considered to be within the scope of the present specification recorded herein unless inconsistent. [Explanation of symbols]

[0049] 100: Trigger comparison unit 200: Controller 300: Delay unit 400: Analog-to-digital converter 500: Trigger display unit 501: Waveform processing unit 502: Waveform drawing unit 503: Trigger interpolation unit 504: Trigger drawing unit 505: Waveform display unit

Claims

1. A signal processing device configured to output one of two types of target signals based on a trigger signal and a trigger level, a trigger comparison unit (100) configured to extract a low frequency component signal of the trigger signal; a controller (200) electrically connected to the trigger comparison unit (100), configured to generate a trigger comparison signal based on a relationship between the low-frequency component signal and the trigger signal, and output one target signal obtained based on the trigger comparison signal according to a preset including comparing the trigger comparison signal with the trigger level; a trigger display unit (500) electrically connected to the controller (200) and configured to receive the one target signal and display it on a target interaction interface; a signal processing device comprising:

2. The signal processing device according to claim 1 , wherein the trigger comparison signal is a signal obtained by filtering the low-frequency component signal from the trigger signal.

3. 2. The signal processing apparatus of claim 1, further comprising a delay unit (300) electrically connected to the controller (200) and configured to compensate for a delay of the trigger comparison unit (100) to align the low frequency component signal with the trigger signal in a time dimension.

4. The signal processing device of claim 2 , wherein the controller (200) is further configured to obtain a peak signal of the trigger comparison signal.

5. The preset rules are: When the value corresponding to the amplitude of the trigger comparison signal is equal to or greater than the value corresponding to the amplitude of the trigger level, the target signal displayed on the target interaction interface includes the peak signal and the trigger waveform; When a value corresponding to the amplitude of the trigger comparison signal is smaller than a value corresponding to the amplitude of the trigger level, the trigger display unit (500) is configured to display a target signal on the target interaction interface including an initial waveform including the peak signal and at least one trigger waveform; The signal processing device of claim 4 , comprising:

6. 6. A signal processing device according to claim 4 or 5, comprising an analog-to-digital converter (400) having an output terminal connected to an input terminal of the trigger comparison unit (100) and an input terminal of the delay unit (300), the analog-to-digital converter (400) being configured to convert the trigger signal from an analog quantity to a digital quantity.

7. The signal processing device according to claim 4 , wherein the peak signal of the trigger comparison signal includes at least one of a maximum value of the trigger comparison signal and a minimum value of the trigger comparison signal.

8. A digital oscilloscope including the signal processing device according to any one of claims 1 to 7.

9. A signal processing method for outputting one of two types of target signals based on a trigger signal and a trigger level, comprising: extracting a low frequency component signal of the trigger signal; generating a trigger comparison signal based on a relationship between the low frequency component signal and the trigger signal; outputting one target signal obtained based on the trigger comparison signal according to a preset including comparing the trigger comparison signal with the trigger level; receiving the one target signal and displaying it on a target interaction interface; A signal processing method comprising:

10. 10. The signal processing method according to claim 9, wherein the trigger comparison signal is a signal obtained by filtering the low-frequency component signal from the trigger signal.

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