Multi-channel acquisition method for generalized frequency conversion equipment

Abstract

The invention discloses a multi-channel acquisition method for generalized frequency conversion equipment, and belongs to the technical field of multi-channel acquisition of the generalized frequency conversion equipment, and the method comprises the steps: constructing a multi-channel signal acquisition system for the generalized frequency conversion equipment; establishing a simulation model of the multi-channel signal acquisition system, and performing simulation adjustment on the multi-channel signal acquisition system through the simulation model; the simulation model is shared to corresponding users; the detected device outputs a detection signal, the main controller outputs a clock signal and an initial signal, the output end of the shift register is driven to perform shift output, and the shift register outputs a switch control signal; the switch control signal controls a signal switch connected with the first output end to be switched on, and a detection signal output by the corresponding detected equipment is transmitted to the signal acquisition circuit; the signal acquisition circuit acquires the transmitted detection signal and processes the acquired detection signal; and acquisition control is carried out through the main controller.

Description

Technical Field

[0001] The present invention belongs to the technical field of multi-channel acquisition of generalized frequency conversion equipment, and in particular relates to a multi-channel acquisition method for generalized frequency conversion equipment. Background Art

[0002] In the fields of automation control, industrial monitoring, power electronics, etc., it is often necessary to collect multi-channel signals output by generalized frequency conversion equipment. There are two main traditional multi-channel signal collection methods:

[0003] Utilizing a multi-channel acquisition device or multiple acquisition devices, such as an analog-to-digital converter chip with multiple input channels, for multi-channel signal acquisition. However, this acquisition device has a fixed number of channels and can only acquire signals from a fixed number of channels. Furthermore, compared to other chips, analog-to-digital converter chips are more expensive, and multi-channel analog-to-digital converter chips are even more expensive, significantly increasing system costs.

[0004] Multi-channel signal acquisition is realized by channel switching using a multi-channel switch device: However, when a multi-channel switch device is used to acquire signals with a large number of channels, the circuit structure of the multi-channel switch device will be very complex. Therefore, the multi-channel switch device is mostly used to acquire signals with a small number of channels and is also limited by the number of channels.

[0005] In summary, the traditional multi-channel signal acquisition method is limited by the number of channels of acquisition devices and switching devices, has great limitations, and is difficult to meet the diverse needs of multi-channel signal acquisition for generalized frequency conversion equipment.

[0006] Based on this, in order to solve the above problems, the present invention provides a multi-channel acquisition method for generalized frequency conversion equipment. Summary of the Invention

[0007] In order to solve the problems existing in the above solutions, the present invention provides a multi-channel acquisition method for generalized frequency conversion equipment.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A multi-channel acquisition method for generalized frequency conversion equipment, the method comprising:

[0010] Step 1: Construct a multi-channel signal acquisition system for generalized frequency conversion equipment, the multi-channel signal acquisition system including:

[0011] Main controller: comprising a first output terminal for outputting a clock signal and a second output terminal for outputting an initial signal;

[0012] At least one shift register, each shift register comprising a first input terminal, a second input terminal, and N output terminals, where N>2;

[0013] A plurality of signal switches: each signal switch is connected to an output terminal of the shift register, and the output terminals of the shift register to which each signal switch is connected are different;

[0014] Several devices under test: Several devices under test are connected to several signal switches in a one-to-one correspondence, and the devices under test output detection signals;

[0015] Signal acquisition circuit: The signal acquisition circuit is connected to several signal switches and the main controller, and is used to collect the detection signals output by the device under test and process the collected detection signals.

[0016] Furthermore, when the multi-channel signal acquisition system includes a shift register, the first input end of the shift register is connected to the first output end of the main controller, and the second input end of the shift register is connected to the second output end of the main controller; when the multi-channel signal acquisition system includes multiple shift registers, the multiple shift registers are cascaded, the second input end of the latter shift register of two adjacent shift registers is connected to the Nth output end of the previous shift register, the first input ends of the multiple shift registers are all connected to the first output end of the main controller, and the second input end of the first shift register is connected to the second output end of the main controller.

[0017] Furthermore, the method for determining the number of shift registers includes:

[0018] The user sets the total number of signal channels that need to be collected by the generalized frequency conversion device, and marks the total number of signal channels as ML;

[0019] Identify the number of outputs of the shift register and label the number of outputs as N;

[0020] The number of shift registers is calculated according to a preset quantity formula.

[0021] Furthermore, the method for determining the number of shift registers includes:

[0022] Identify the generalized frequency conversion equipment that needs to be collected at the user's location and mark the generalized frequency conversion equipment as the reference equipment; obtain the user's industry information and determine the corresponding equipment information to be selected based on the industry information;

[0023] Obtain the acquisition application scope of the multi-channel signal acquisition system to be established;

[0024] The equipment information to be selected is filtered by collecting applicable scope, and the equipment information not within the applicable scope is eliminated, and the generalized frequency conversion equipment corresponding to the remaining equipment information to be selected is marked as reserve equipment;

[0025] Identify the total number of signal channels corresponding to the reference equipment and the reserve equipment respectively, select the total number of signal channels with the largest number as the representative value; mark the representative value as ML;

[0026] Identify the number of outputs of the shift register and label the number of outputs as N;

[0027] The number of shift registers is determined according to a preset quantity formula.

[0028] Furthermore, the method for determining the equipment information to be selected based on the industry information includes:

[0029] identifying generalized frequency conversion equipment information and demand background information of non-reference equipment based on industry information, and marking the generalized frequency conversion equipment information as equipment information to be selected;

[0030] Analyze the demand background information, determine the corresponding potential devices, screen the potential devices, and mark the remaining potential device information as candidate device information.

[0031] Furthermore, the quantity formula is:

[0032]

[0033] Wherein: ceil(ML / N) is the number of shift registers, which means rounding up ML / N; Z is a set of integers; and x is the smallest integer that satisfies x≥ML / N.

[0034] Step 2: Establish a simulation model of the multi-channel signal acquisition system, simulate and adjust the multi-channel signal acquisition system through the simulation model; and share the simulation model with relevant users;

[0035] Step 3: The device under test outputs a detection signal, the main controller outputs a clock signal and an initial signal, drives the output end of the shift register to shift output, and the output switch of the shift register controls the signal;

[0036] Step 4: The switch control signal controls the signal switch connected to the first output terminal to be turned on, and the corresponding detection signal output by the device under test is transmitted to the signal acquisition circuit;

[0037] Step 5: The signal acquisition circuit acquires the transmitted detection signal and processes the acquired detection signal;

[0038] Step 6: Perform acquisition control through the main controller.

[0039] Furthermore, it also includes step seven: obtaining the user's acquisition requirements, determining the optimization method based on the acquisition requirements, simulating and adjusting the optimization method based on the simulation model, and obtaining the target optimization method; when the user has the need to apply the target optimization method, the target optimization method is sent to the platform, and the platform adjusts the multi-channel signal acquisition system.

[0040] Furthermore, the method for determining the optimization method according to the collection requirements includes:

[0041] Analyze the collection requirements to obtain corresponding adjustment methods to be selected;

[0042] Estimate the optimization cost of each candidate adjustment method, determine the priority of each candidate adjustment method in ascending order of optimization cost, and mark the candidate adjustment method with the highest priority as the optimized method.

[0043] Furthermore, the selected adjustment method is to adjust the software part of the multi-channel signal acquisition system.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] This invention breaks the shackles of traditional multi-channel signal acquisition methods, which are limited by the number of channels in acquisition and switching devices. Through its innovative architectural design, it can easily expand and reduce the number of channels, meeting the diverse needs of multi-channel signal acquisition for generalized frequency conversion equipment in different application scenarios. Whether collecting signals from a small number of channels or a large number of channels, this solution can flexibly adapt without replacing or redesigning the entire acquisition system, greatly improving the system's versatility and scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 Flow chart of the method of the present invention. DETAILED DESCRIPTION

[0048] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] like Figure 1 As shown, a multi-channel acquisition method for generalized frequency conversion equipment includes:

[0050] Step 1: Construct a multi-channel signal acquisition system for generalized frequency conversion equipment, the multi-channel signal acquisition system including:

[0051] The main controller comprises a first output terminal for outputting a clock signal and a second output terminal for outputting an initial signal.

[0052] At least one shift register: each shift register includes a first input terminal, a second input terminal, and N output terminals (N>2). When the multi-channel signal acquisition system includes one shift register, the first input terminal of the shift register is connected to the first output terminal of the main controller, and the second input terminal of the shift register is connected to the second output terminal of the main controller; when the multi-channel signal acquisition system includes multiple shift registers, the multiple shift registers are cascaded, and the second input terminal of the latter of two adjacent shift registers is connected to the Nth output terminal of the previous shift register. The first input terminals of the multiple shift registers are all connected to the first output terminal of the main controller, and the second input terminal of the first shift register is connected to the second output terminal of the main controller.

[0053] A plurality of signal switches: each signal switch is connected to an output end of the shift register, and the output ends of the shift register to which each signal switch is connected are different.

[0054] Several devices under test: Several devices under test are connected to several signal switches in a one-to-one correspondence, and the devices under test output detection signals.

[0055] Signal acquisition circuit: The signal acquisition circuit is connected to several signal switches and the main controller, and is used to collect the detection signals output by the device under test and process the collected detection signals.

[0056] In one embodiment, the method for determining the number of shift registers includes:

[0057] The user sets the total number of signal channels that need to be collected by the generalized frequency conversion device, and marks the total number of signal channels as ML;

[0058] Identify the number of outputs of the shift register and label the number of outputs as N;

[0059] Determine the number of shift registers according to the preset quantity formula; the quantity formula is:

[0060]

[0061] Wherein: ceil(ML / N) is the number of shift registers, which means rounding up ML / N; Z is a set of integers; and x is the smallest integer that satisfies x≥ML / N.

[0062] In one embodiment, the method for determining the number of shift registers includes:

[0063] Identify the generalized frequency conversion equipment information that needs to be collected at the user's location, and mark the generalized frequency conversion equipment information as benchmark equipment information; obtain the collection application scope of the multi-channel signal acquisition system to be established, that is, which generalized frequency conversion equipment can be collected by the multi-channel signal acquisition system; obtain the user's industry information, which refers to the other generalized frequency conversion equipment information currently available and the demand background data for generalized frequency conversion equipment that may be added in the future. The demand background data is used to determine whether the user will add new generalized frequency conversion equipment in the future, so the corresponding demand background data is collected based on the demand; determine the corresponding generalized frequency conversion equipment information based on the industry information, including other generalized frequency conversion equipment information and generalized frequency conversion equipment information that may be added based on production and development needs, and uniformly mark them as equipment information to be selected;

[0064] The equipment information to be selected is filtered by collecting applicable scope, and the equipment information not within the applicable scope is eliminated, and the generalized frequency conversion equipment corresponding to the remaining equipment information to be selected is marked as reserve equipment;

[0065] Identify the total number of signal channels corresponding to the reference equipment and the reserve equipment respectively, select the total number of signal channels with the largest number as the representative value; mark the representative value as ML;

[0066] Identify the number of outputs of the shift register and label the number of outputs as N;

[0067] Determine the number of shift registers according to the preset quantity formula; the quantity formula is:

[0068]

[0069] Wherein: ceil(ML / N) is the number of shift registers, which means rounding up ML / N; Z is a set of integers; and x is the smallest integer that satisfies x≥ML / N.

[0070] In one embodiment, a method for determining information of equipment to be selected based on industry information includes:

[0071] Identify generalized variable frequency equipment information and demand background information that are not benchmark equipment information based on industry information, and mark the generalized variable frequency equipment information as candidate equipment information;

[0072] Analyze the demand background information to determine the generalized frequency conversion equipment that the user may have potential demand for, mark them as potential equipment, screen the potential equipment, and mark the remaining potential equipment information as equipment to be selected.

[0073] In one embodiment, the demand background information is analyzed based on existing demand analysis methods to determine whether the user has the demand for applying generalized variable frequency equipment and to determine the corresponding demand probability; for example, a corresponding demand analysis model is established based on machine learning, deep learning algorithms, etc., and a corresponding training set is established manually for training. The training set includes input data and output data, the input data being the demand background information and demand probability, and the output data being the potential equipment information; and analysis is performed using the demand analysis model after successful training.

[0074] In one embodiment, potential devices may be screened based on corresponding demand probabilities, eliminating those with a probability lower than a preset probability; or they may be screened based on other existing technologies, such as the common screening by users.

[0075] Step 2: Establish a simulation model of the multi-channel signal acquisition system, perform simulation adjustments on the multi-channel signal acquisition system through the simulation model; and share the simulation model with corresponding users.

[0076] In one embodiment, a simulation model of a multi-channel signal acquisition system is established based on existing simulation technology;

[0077] Exemplary, model components and implementations:

[0078] Shift register cascade circuit:

[0079] Tool: Use LTspice to build a cascade circuit and simulate data transmission delay.

[0080] parameter:

[0081] Register model (such as 74HC595), transmission delay (typical value 100ns).

[0082] The number of cascades (e.g., 8 stages) and the total delay calculation (8×100ns=800ns) are calculated.

[0083] Channel switch model:

[0084] Tool: Simulate switch control logic in SystemVerilog.

[0085] parameter:

[0086] Switch on-resistance (10Ω), off-leakage current (1nA).

[0087] Switching time (≤50ns).

[0088] Signal Generation:

[0089] Tools: Use MATLAB to generate 8-channel sine wave signals (frequency 1kHz, amplitude 1V).

[0090] Output: Import signal files (such as .csv) into LTspice as input.

[0091] Verification process:

[0092] The cascade circuit is simulated in LTspice to observe the waveform of data transmission from the 1st to the 8th stage.

[0093] Simulate switch switching in SystemVerilog and record the signal distortion when the channel switches (such as THD ≤ 0.1%).

[0094] Step 3: The device under test outputs a detection signal, the main controller outputs a clock signal and an initial signal, drives the output end of the shift register to shift output, and the output switch of the shift register controls the signal.

[0095] Step 4: The switch control signal controls the signal switch connected to the first output terminal to be turned on, and the corresponding detection signal output by the device under test is transmitted to the signal acquisition circuit;

[0096] Step 5: The signal acquisition circuit acquires the transmitted detection signal and processes the acquired detection signal;

[0097] Such as signal amplification, signal filtering, analog-to-digital conversion, digital signal processing and other corresponding processing.

[0098] Step 6: Perform acquisition control through the main controller.

[0099] In one embodiment, the method for performing acquisition control by the main controller includes:

[0100] The main controller determines whether the detection signals of all required channels have been collected;

[0101] When the collection is completed, the collection is ended;

[0102] When the acquisition is not completed, the main controller controls the current output end to stop outputting the switch control signal, and the next output end outputs the switch control signal to control the corresponding signal switch to be turned on. The signal acquisition circuit collects the detection signal output by the device under test corresponding to the corresponding signal switch until the detection signals of all required channels are collected and the acquisition is ended.

[0103] In one embodiment, step seven is also included: obtaining the user's acquisition requirements, determining the optimization method based on the acquisition requirements, simulating and adjusting the optimization method based on the simulation model, and obtaining the target optimization method; when the user has the need to apply the target optimization method, the target optimization method is sent to the platform, and the platform adjusts the multi-channel signal acquisition system.

[0104] The acquisition requirements include replacing new generalized frequency conversion equipment for acquisition and meeting the requirements that are not met by the existing acquisition, such as transmission efficiency, memory usage and other related requirements.

[0105] That is, users can simulate and analyze various acquisition requirements based on the simulation model to understand their optimization and adjustment status, but they do not necessarily have to make application adjustments.

[0106] In one embodiment, the optimization method is determined according to the collection requirements, and analysis can be performed based on existing methods, such as establishing an intelligent model based on machine learning, deep learning algorithms, etc. to perform intelligent analysis of the collection requirements and determine the best adjustment method to meet the user's collection requirements, which refers to adjusting the software, not the hardware, and marking it as the target optimization method.

[0107] In one embodiment, a method for determining an optimization method based on acquisition requirements includes:

[0108] A demand conversion model is established based on machine learning, deep learning algorithms, etc. The demand conversion model is used to analyze the acquisition requirements, determine the methods for adjusting the multi-channel signal acquisition system to meet the acquisition requirements, and integrate the corresponding methods into candidate adjustment methods; the platform establishes a training set through manual methods, etc., and analyzes the demand conversion model after successful training to obtain the corresponding candidate adjustment methods; the acquisition requirements can also be analyzed through other methods to obtain the corresponding candidate adjustment methods, such as the platform pre-setting a corresponding adjustment library based on the current multi-channel signal acquisition system, pre-storing the candidate adjustment methods corresponding to various possible acquisition requirements through the adjustment library, and the platform updates the adjustment library; subsequently, the corresponding candidate adjustment methods are matched according to the acquisition requirements.

[0109] Estimate the optimization cost of each candidate adjustment method, determine the priority of each candidate adjustment method in ascending order of optimization cost, and mark the candidate adjustment method with the highest priority as the optimized method.

[0110] In one embodiment, relevant parameters such as optimization effect may be added to determine the priority of each candidate adjustment method.

[0111] The above formulas are all calculated by removing dimensions and taking their numerical values. The formula is a formula that is closest to the actual situation obtained by collecting a large amount of data and performing software simulation. The preset parameters and preset thresholds in the formula are set by technicians in this field according to actual conditions or obtained by simulating a large amount of data.

[0112] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A multi-channel acquisition method for generalized frequency conversion equipment, characterized in that: Methods include: Step 1: Construct a multi-channel signal acquisition system for generalized frequency conversion equipment, the multi-channel signal acquisition system including: Main controller: comprising a first output terminal for outputting a clock signal and a second output terminal for outputting an initial signal; At least one shift register, each shift register comprising a first input terminal, a second input terminal, and N output terminals, where N>2; A plurality of signal switches: each signal switch is connected to an output terminal of the shift register, and the output terminals of the shift register to which each signal switch is connected are different; Several devices under test: Several devices under test are connected to several signal switches in a one-to-one correspondence, and the devices under test output detection signals; Signal acquisition circuit: The signal acquisition circuit is connected to several signal switches and the main controller, and is used to collect the detection signals output by the device under test and process the collected detection signals; Step 2: Establish a simulation model of the multi-channel signal acquisition system, simulate and adjust the multi-channel signal acquisition system through the simulation model; and share the simulation model with relevant users; Step 3: The device under test outputs a detection signal, the main controller outputs a clock signal and an initial signal, drives the output end of the shift register to shift output, and the output switch of the shift register controls the signal; Step 4: The switch control signal controls the signal switch connected to the first output terminal to be turned on, and the corresponding detection signal output by the device under test is transmitted to the signal acquisition circuit; Step 5: The signal acquisition circuit acquires the transmitted detection signal and processes the acquired detection signal; Step 6: Perform acquisition control through the main controller.

2. The multi-channel acquisition method for generalized frequency conversion equipment according to claim 1, characterized in that: When the multi-channel signal acquisition system includes a shift register, the first input end of the shift register is connected to the first output end of the main controller, and the second input end of the shift register is connected to the second output end of the main controller; when the multi-channel signal acquisition system includes multiple shift registers, the multiple shift registers are cascaded, the second input end of the latter shift register of two adjacent shift registers is connected to the Nth output end of the previous shift register, the first input ends of the multiple shift registers are all connected to the first output end of the main controller, and the second input end of the first shift register is connected to the second output end of the main controller.

3. The multi-channel acquisition method for generalized frequency conversion equipment according to claim 1, characterized in that: Methods for determining the number of shift registers include: The user sets the total number of signal channels that need to be collected by the generalized frequency conversion device, and marks the total number of signal channels as ML; Identify the number of outputs of the shift register and label the number of outputs as N; The number of shift registers is calculated according to a preset quantity formula.

4. The multi-channel acquisition method for generalized frequency conversion equipment according to claim 1, characterized in that: Methods for determining the number of shift registers include: Identify the generalized frequency conversion equipment that needs to be collected at the user's location and mark the generalized frequency conversion equipment as the reference equipment; obtain the user's industry information and determine the corresponding equipment information to be selected based on the industry information; Obtain the acquisition application scope of the multi-channel signal acquisition system to be established; The equipment information to be selected is filtered by collecting applicable scope, and the equipment information not within the applicable scope is eliminated, and the generalized frequency conversion equipment corresponding to the remaining equipment information to be selected is marked as reserve equipment; Identify the total number of signal channels corresponding to the reference equipment and the reserve equipment respectively, select the total number of signal channels with the largest number as the representative value; mark the representative value as ML; Identify the number of outputs of the shift register and label the number of outputs as N; The number of shift registers is determined according to a preset quantity formula.

5. The multi-channel acquisition method for generalized frequency conversion equipment according to claim 4, characterized in that: Methods for determining the information of equipment to be selected based on industry information include: identifying generalized frequency conversion equipment information and demand background information of non-reference equipment based on industry information, and marking the generalized frequency conversion equipment information as equipment information to be selected; Analyze the demand background information, determine the corresponding potential devices, screen the potential devices, and mark the remaining potential device information as candidate device information.

6. A multi-channel acquisition method for generalized frequency conversion equipment according to claim 3 or 4, characterized in that: The quantity formula is: Wherein: ceil(ML / N) is the number of shift registers, which means rounding up ML / N; Z is a set of integers; and x is the smallest integer that satisfies x≥ML / N.

7. The multi-channel acquisition method for generalized frequency conversion equipment according to claim 1, characterized in that: It also includes step seven: obtaining the user's acquisition requirements, determining the optimization method based on the acquisition requirements, simulating and adjusting the optimization method based on the simulation model, and obtaining the target optimization method; when the user has the need to apply the target optimization method, the target optimization method is sent to the platform, and the platform adjusts the multi-channel signal acquisition system.

8. The multi-channel acquisition method for generalized frequency conversion equipment according to claim 7, characterized in that: Methods for determining optimization methods based on collection requirements include: Analyze the collection requirements to obtain corresponding adjustment methods to be selected; Estimate the optimization cost of each candidate adjustment method, determine the priority of each candidate adjustment method in ascending order of optimization cost, and mark the candidate adjustment method with the highest priority as the optimized method.

9. The multi-channel acquisition method for generalized frequency conversion equipment according to claim 8, characterized in that: The selected adjustment method is to adjust the software part of the multi-channel signal acquisition system.

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