Multipath analog signal processing device
By combining shift registers and gating switches, a multi-channel analog signal processing device was developed, which solved the problems of hardware cost and resource consumption in multi-channel signal processing and achieved efficient and low-cost signal processing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-03-31
AI Technical Summary
In industrial production and image processing, using a single-channel analog-to-digital converter architecture to process multiple signals significantly increases hardware costs and consumes a large amount of controller peripheral resources.
It adopts a combined architecture of shift register, gating switch and analog-to-digital converter. Multiple analog signals are converted into parallel control signals through first-level and second-level gating switches and processed by analog-to-digital converter, which reduces hardware cost and controller peripheral resource requirements.
It achieves efficient processing of multiple analog signals, reduces hardware costs and dependence on controller peripheral resources, and improves noise immunity.
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Figure CN224068650U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of signal processing, and more particularly to a multi-channel analog signal processing device. Background Technology
[0002] A signal is a carrier of information; it is a physical quantity that carries information and exhibits regular characteristics that change with time, space, or other independent variables. Signals are classified into analog signals and digital signals based on their properties. Analog signals are continuous in both time and amplitude. Digital signals are discrete in both time and amplitude, and can be obtained by sampling and quantizing analog signals.
[0003] Signal processing technology refers to the techniques used to acquire, analyze, transform, synthesize, or enhance signals through mathematical algorithms and physical devices. It is widely applied in fields such as communication, control systems, and image processing. Signal processing technology is divided into digital signal processing technology and analog signal processing technology. Digital signal processing technology refers to the techniques for processing digital signals through signal transformation, filtering, detection, estimation, modulation, and demodulation. Analog signal processing technology refers to the techniques for processing analog signals through amplification, filtering, modulation, and demodulation.
[0004] In fields such as industrial production and image processing, for multiple acquired analog signals, each acquired analog signal can be converted into a digital signal using an analog-to-digital converter, and the converted digital signal can be processed to obtain the desired result.
[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content
[0006] The inventors discovered that while a single-channel analog-to-digital converter (ADC) can be used for single-channel signal processing in fields such as industrial production and image processing, this architecture leads to a significant increase in hardware costs and consumes a large amount of controller peripheral resources when dealing with multiple signals. Therefore, optimizing the signal processing architecture and reducing hardware costs is a problem that needs to be solved.
[0007] To address at least one of the aforementioned technical problems or other similar issues, embodiments of this application provide a multi-channel analog signal processing device that can reduce hardware costs and decrease reliance on controller peripheral resources.
[0008] According to one aspect of the embodiments of this application, a multi-channel analog signal processing apparatus is provided, the apparatus comprising:
[0009] A shift register that receives serial control signals and converts the serial control signals into parallel control signals;
[0010] A gating switch, comprising at least one primary gating switch and at least one secondary gating switch;
[0011] Wherein, one of the first-level gating switches receives at least one analog signal and selects one first analog signal based on the parallel control signal; one of the second-level gating switches receives at least one first analog signal output from the first-level gating switch and selects one second analog signal based on the parallel control signal;
[0012] An analog-to-digital converter that converts the second analog signal into a digital signal;
[0013] The controller sends the serial control signal to the shift register to control the gating switch and receives the digital signal from the analog-to-digital converter.
[0014] In some embodiments, the primary gating switch is an eight-in-one-out switch, and the secondary gating switch is a four-in-one-out switch; the device includes four primary gating switches and one secondary gating switch to process 32 analog signals.
[0015] In some embodiments, the analog signal, the first analog signal, and the second analog signal are input differentially.
[0016] In some embodiments, the grounding ring protrudes beyond the detection electrode.
[0017] In some embodiments, the device further includes: an analog signal input terminal electrically connected to a terminal block, for inputting the at least one analog signal into the selector switch; wherein the at least one analog signal is an analog voltage signal.
[0018] In some embodiments, the device further includes: a temperature signal input terminal electrically connected to a terminal block, which converts at least one temperature signal into at least one analog voltage signal and inputs the at least one analog voltage signal into the selector switch.
[0019] In some embodiments, after receiving an enable signal from the controller, the analog-to-digital converter converts the second analog signal into the digital signal using a time-division multiplexing method; after receiving a trigger signal from the controller, the shift register converts the serial control signal into the parallel control signal.
[0020] In some embodiments, the controller sends the same clock signal to the shift register and the analog-to-digital converter.
[0021] In some embodiments, the apparatus further includes: a first isolator that isolates the analog-to-digital converter and the controller, and a second isolator that isolates the controller and the shift register.
[0022] One of the beneficial effects of the embodiments of this application is that: multiple analog signals can be selected based on at least one primary gating switch and at least one secondary gating switch, thereby enabling the processing of multiple channels of analog signals using a single analog-to-digital converter, reducing hardware costs and the demand for controller peripheral resources.
[0023] Referring to the following description and accompanying drawings, specific implementation methods of the embodiments of this application are disclosed in detail, indicating how the principles of the embodiments of this application can be adopted. It should be understood that the implementation methods of this application are not limited in scope. Within the spirit and scope of the appended claims, the implementation methods of this application include many changes, modifications, and equivalents. Attached Figure Description
[0024] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other implementation methods based on these drawings without creative effort. In the drawings:
[0025] Figure 1 This is a schematic diagram of a multi-channel analog signal processing apparatus according to an embodiment of this application;
[0026] Figure 2 This is a partial schematic diagram of a multi-channel analog signal processing apparatus according to an embodiment of this application;
[0027] Figure 3 This is a schematic diagram of the operation of the analog-to-digital converter implemented in this application;
[0028] Figure 4 This is a schematic diagram of the operation of a shift register according to an embodiment of this application;
[0029] Figure 5 This is another partial schematic diagram of a multi-channel analog signal processing apparatus according to an embodiment of this application;
[0030] Figure 6 This is a schematic diagram of a multi-channel analog signal processing method according to an embodiment of this application. Detailed Implementation
[0031] Referring to the accompanying drawings, the foregoing and other features of the embodiments of this application will become apparent from the following description. Specific embodiments of this application are specifically disclosed in the description and drawings, illustrating partial implementations in which the principles of the embodiments of this application can be adopted. It should be understood that this application is not limited to the described embodiments; rather, the embodiments of this application include all modifications, variations, and equivalents falling within the scope of the appended claims.
[0032] In the embodiments of this application, the terms "first," "second," etc., are used to distinguish different elements by name, but do not indicate the spatial arrangement or chronological order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one or more of the terms listed in association and all combinations thereof. The terms "comprising," "including," "having," etc., refer to the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.
[0033] In the embodiments of this application, the singular forms "a," "the," etc., including the plural forms, should be broadly understood as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms, unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.
[0034] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. The term "comprising / including" as used herein means the presence of a feature, integral, step, or component, but does not exclude the presence or addition of one or more other features, integrals, steps, or components.
[0035] Figure 1 This is a schematic diagram of a multi-channel analog signal processing apparatus according to an embodiment of this application, showing the overall structure of the multi-channel analog signal processing apparatus, such as... Figure 1As shown, the multi-channel analog signal processing device 100 includes: a shift register 101, a gating switch 102, an analog-to-digital converter 103, and a controller 104. The gating switch 102 includes at least one primary gating switch 1021 and at least one secondary gating switch 1022. The primary gating switch 1021 receives at least one analog signal and selects a first analog signal based on parallel control signals. The secondary gating switch 1022 receives at least one first analog signal output from the primary gating switch 1021 and selects a second analog signal based on parallel control signals.
[0036] Therefore, by employing at least one primary gating switch 1021 and at least one secondary gating switch 1022, multiple analog signals can be selected, thereby enabling the processing of multiple channels of analog signals using a single analog-to-digital converter 103, reducing hardware costs and minimizing the need for peripheral resources of the controller 104.
[0037] In some embodiments, the primary gating switches 1021 and 1022 can be eight-in-one-out switches, four-in-one-out switches, or other types of switches, and this application is not limited thereto. For example, if the primary gating switch is an eight-in-one-out switch and the secondary gating switch is a four-in-one-out switch, and the device includes four primary gating switches and one secondary gating switch, it can process 32 channels of analog signals. As another example, if the primary gating switch is a four-in-one-out switch and the secondary gating switch is a four-in-one-out switch, and the device includes four primary gating switches and one secondary gating switch, it can process 16 channels of analog signals.
[0038] Figure 2 This is a partial schematic diagram of a multi-channel analog signal processing apparatus according to an embodiment of this application. Figure 2As shown, the primary selection switch 1021 is an eight-input, one-output switch, and the secondary selection switch 1022 is a four-input, one-output switch. The multi-channel analog signal processing device 100 includes four primary selection switches 1021 and one secondary selection switch 1022. When a signal is input to the primary selection switch 1021, the primary selection switch 1021 selects one signal from the received signals. For example, if ports PT1 to PT8 send signals to the primary selection switch 1021, the primary selection switch 1021 receives signals from these eight ports. The signal is sent, and the signal sent from the PT1 port is selected to be sent to the secondary gating switch 1022; the secondary gating switch 1022 selects a signal from the received signals. For example, the secondary gating switch 1022 receives the signal input from the PT1 port, the signal input from the AD8 port, the signal input from the AD11 port and the signal input from the AD21 port sent by the primary gating switch 1021, and the secondary gating switch 1022 selects to send the signal received from the AD8 port to the analog-to-digital converter 103.
[0039] In some embodiments, the gating switch 102 receives at least one analog signal. For example, if the first-level gating switch 1021 is an eight-input, one-output gating switch, it receives at least one analog signal and at most eight analog signals; if the second-level gating switch 1022 is a four-input, one-output gating switch, it receives at least one analog signal and at most four analog signals.
[0040] In some embodiments, the number of levels of the gating switch 102 can be 1, 2, or other numbers, and this application is not limited thereto. For example, for an eight-channel analog signal, the multi-channel analog signal processing device can use an eight-input-one-output first-level gating switch to process it; for a 32-channel analog signal, the multi-channel analog signal processing device can use four eight-input-one-output first-level gating switches and one four-input-one-output second-level analog switch to process it; for a 128-channel analog signal, the multi-channel analog signal processing device can use sixteen eight-input-one-output first-level gating switches, four four-input-one-output second-level analog switches, and one four-input-one-output third-level analog switch to process it.
[0041] Therefore, multiple analog signals can be selected through a multi-level gating switch architecture.
[0042] In some embodiments, the analog signal, the first analog signal, and the second analog signal are input differentially to achieve better noise immunity. However, this application is not limited to this; the analog signal, the first analog signal, and the second analog signal may also employ single-ended input, pseudo-differential input, etc.
[0043] In some embodiments, the multi-channel analog signal processing device 100 further includes: an analog signal input terminal 105, electrically connected to a terminal block 106, for inputting at least one analog signal into a selection switch 102; wherein the at least one analog signal is an analog voltage signal. Figure 2 As shown, the analog signal input terminal 105 is connected to the terminal block 106, which inputs at least one analog voltage signal differentially into the first-level selector switch 1021.
[0044] In some embodiments, the multi-channel analog signal processing device 100 further includes: a temperature signal input terminal 107, which is electrically connected to a terminal block 106, converts at least one temperature signal into at least one analog voltage signal, and inputs at least one analog voltage signal to a selection switch 102. Figure 2 As shown, the temperature signal input terminal 107 is connected to the terminal block 106, which converts at least one temperature signal into at least one analog voltage signal, and inputs the converted at least one analog voltage signal into the first-level selector switch 1021 in a differential manner.
[0045] In some embodiments, the multi-channel analog signal processing device 100 may further include input terminals for different types of signals such as pressure signal input terminal and displacement signal input terminal, but this application is not limited thereto.
[0046] This allows for the unification of different types of analog signals, resolving compatibility issues with multi-source signals, and ultimately enabling the processing of multiple mixed analog signals.
[0047] In some embodiments, after receiving the enable signal sent by the controller 104, the analog-to-digital converter 103 converts the second analog signal into a digital signal using a time-division multiplexing method.
[0048] Figure 3 This is a schematic diagram of the analog-to-digital converter implemented in this application, as shown below. Figure 3 As shown, the controller 104 sends an enable signal to the CS port of the analog-to-digital converter 103. After receiving the enable signal, the analog-to-digital converter 103 uses time-division multiplexing to convert the second analog signal into a digital signal. For example, at time t0, the analog signal input from the AD1 port is converted into a digital signal; at time t1, the analog signal input from the PT5 port is converted into a digital signal; at time t3, the analog signal input from the AD10 port is converted into a digital signal, and so on.
[0049] In some embodiments, after receiving a trigger signal from the controller 104, the shift register 101 converts the serial control signal into a parallel control signal.
[0050] Figure 4This is a schematic diagram of the operation of a shift register according to an embodiment of this application, as shown below. Figure 4 As shown, when the STROBE port of shift register 101 receives the trigger signal sent by controller 104 and the DIN port receives the serial signal "0100 1001", shift register 101 converts the received serial signal "0100 1001" into a parallel signal, that is, the ports Q7 to Q1 output one bit of "0100100" in sequence.
[0051] Figure 5 This is another partial schematic diagram of a multi-channel analog signal processing apparatus according to an embodiment of this application. In some embodiments, such as... Figure 5 As shown, a portion of the parallel control signals output by shift register 101 is used to control the first-level gating switch 1021, and another portion is used to control the second-level gating switch 1022. This application is not limited to this; the parallel control signals output by shift register 101 can also be used to control gating switches of other levels. For example, the first portion of the parallel control signals output by the shift register can be used to control the first-level gating switch, the second portion can be used to control the second-level gating switch, and the remaining portion can be used to control the third-level gating switch.
[0052] In some embodiments, the controller sends the same clock signal to both the shift register 101 and the analog-to-digital converter 103. This ensures clock synchronization between the shift register and the analog-to-digital converter.
[0053] In some embodiments, the multi-channel analog signal processing device 100 further includes: a first isolator 108 and a second isolator 109, wherein the first isolator 108 isolates the analog-to-digital converter 103 and the controller 104, and the second isolator 109 isolates the controller 104 and the shift register 101. Thus, the isolators can block the influence of noise, ground potential difference, or high-voltage interference on the controller.
[0054] In some embodiments, the isolator may be an optocoupler isolator, a magnetic isolator, a capacitive isolator, etc., and this application is not limited thereto.
[0055] This application provides a multi-channel analog signal processing method, which corresponds to the multi-channel analog signal processing device described in the foregoing embodiments. The specific implementation can be referred to the foregoing embodiments, and the contents that are the same will not be repeated.
[0056] Figure 6 This is a schematic diagram of a multi-channel analog signal processing method according to an embodiment of this application, as shown below. Figure 6 As shown, the method includes:
[0057] 601: Converts serial control signals into parallel control signals;
[0058] 602: Input at least one analog signal into the first-level gating switch, and determine the first analog signal to be gated based on the parallel control signals;
[0059] 603: Input at least one first analog signal output from the first-level gating switch into the second-level gating switch, and determine one second analog signal to be selected based on the parallel control signals;
[0060] 604: Converts one second analog signal into a digital signal;
[0061] 605: Input digital signals into the controller.
[0062] It is worth noting that the above appendix Figure 6 The embodiments of this application have only been illustrated schematically, and the application is not limited thereto. For example, some of the above steps can be performed simultaneously or in a specific order, and the execution order between the various operations can be appropriately adjusted. Furthermore, other operations can be added or some operations can be removed. Those skilled in the art can make appropriate modifications based on the above description, and are not limited to the above-described embodiments. Figure 6 The records.
[0063] In the embodiments of this application, by employing at least one primary gating switch and at least one secondary gating switch to enable the selection of multiple analog signals, it is possible to process multiple channels of analog signals using a single analog-to-digital converter, thereby reducing hardware costs and the demand for controller peripheral resources.
[0064] In some embodiments, the analog signal, the first analog signal, and the second analog signal are input differentially to achieve better noise immunity. However, this application is not limited to this; the analog signal, the first analog signal, and the second analog signal may also employ single-ended input, pseudo-differential input, etc.
[0065] In some embodiments, the analog signal, the first analog signal, and the second analog signal are analog voltage signals.
[0066] In some embodiments, different types of analog signals are converted into analog voltage signals via an input terminal. For example, such as Figure 2 As shown, the temperature signal input terminal converts at least one temperature signal into at least one analog voltage signal. This application is not limited to this; it can also convert analog signals such as pressure signals and displacement signals into analog voltage signals. Therefore, different types of analog signals can be unified, solving the compatibility problem of multi-source signals, and thus enabling the processing of multiple mixed analog signals.
[0067] In some embodiments, after the trigger signal sent by the controller triggers the shift register, the serial control signal is converted into a parallel control signal. For example... Figure 4As shown, when the STROBE port of shift register 101 receives the trigger signal sent by controller 104 and the DIN port receives the serial signal "0100 1001", shift register 101 converts the received serial signal "0100 1001" into a parallel signal, that is, the ports Q7 to Q1 output one bit of "0100100" in sequence.
[0068] In some embodiments, the parallel control signals output by the shift register are used to control gating switches. The parallel control signals output by the shift register can be used to control multi-level gating switches, such as... Figure 5 As shown, a portion of the parallel control signals output by shift register 101 is used to control the first-level gating switch 1021, and another portion is used to control the second-level gating switch 1022; for example, the first portion of the parallel control signals output by shift register is used to control the first-level gating switch, the second portion is used to control the second-level gating switch, and the remaining portion is used to control the third-level gating switch.
[0069] In some embodiments, after receiving an enable signal from the controller, the analog-to-digital converter converts the second analog signal into a digital signal using a time-division multiplexing method. For example... Figure 3 As shown, the controller 104 sends an enable signal to the CS port of the analog-to-digital converter 103. After receiving the enable signal, the analog-to-digital converter 103 uses time-division multiplexing to convert the second analog signal into a digital signal. For example, at time t0, the analog signal input from the AD1 port is converted into a digital signal; at time t1, the analog signal input from the PT5 port is converted into a digital signal; at time t3, the analog signal input from the AD10 port is converted into a digital signal, and so on.
[0070] In some embodiments, the shift register and analog-to-digital converter synchronize clock signals to ensure clock synchronization between the shift register and the analog-to-digital converter.
[0071] In some embodiments, isolators are used to isolate the analog-to-digital converter and the controller; and isolators are used to isolate the controller and the shift register. This allows isolators to block the effects of noise, ground potential differences, or high-voltage interference on the controller.
[0072] In some embodiments, the isolator may be an optocoupler isolator, a magnetic isolator, a capacitive isolator, etc., and this application is not limited thereto.
[0073] It is worth noting that the above description is merely an exemplary illustration of the configuration of the multi-channel analog signal processing apparatus related to this application, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. Furthermore, the multi-channel analog signal processing apparatus may also include other configurations, which can be specifically referred to in related technologies. In addition, the above description is merely an exemplary illustration of each component, but this application is not limited thereto, and the specific content of each component can be referred to in related technologies; furthermore, components not shown in the figures may be added, or one or more components in the figures may be removed.
[0074] The present application has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on its spirit and principles, and these modifications and variations are also within the scope of the present application.
[0075] Although this disclosure and the disclosure which is currently considered to be its best mode have been described in a manner that identifies the inventor and enables those skilled in the art to make and use it, it should be understood and appreciated that many equivalents of the exemplary embodiments disclosed herein exist and that various modifications and variations may be made thereto without departing from the scope and spirit of this disclosure, which is not limited to the exemplary embodiments but rather to the appended claims.
Claims
1. A multi-path analog signal processing device, characterized by, The device comprises: a shift register receiving a serial control signal and converting the serial control signal into a parallel control signal; a gating switch comprising at least one primary gating switch and at least one secondary gating switch; wherein one of the primary gating switches receives at least one analog signal and selects a first analog signal based on the parallel control signal; one of the secondary gating switches receives at least one first analog signal output from the primary gating switch and selects a second analog signal based on the parallel control signal; an analog-to-digital converter converting the second analog signal into a digital signal; a controller sending the serial control signal to the shift register to control the gating switch and receiving the digital signal from the analog-to-digital converter.
2. The multi-channel analog signal processing device according to claim 1, wherein: the primary gating switch is an eight-to-one switch and the secondary gating switch is a four-to-one switch; the device comprises four primary gating switches and one secondary gating switch to process 32 analog signals.
3. The multi-channel analog signal processing device according to claim 1, wherein: the analog signal, the first analog signal and the second analog signal are input in a differential manner.
4. The multi-path analog signal processing device according to claim 1, wherein The device further comprises: an analog signal input terminal electrically connected to a terminal, inputting the at least one analog signal into the gating switch; wherein the at least one analog signal is an analog voltage signal.
5. The multi-path analog signal processing device according to claim 1, wherein The device further comprises: a temperature signal input terminal electrically connected to a terminal, converting at least one temperature signal into at least one analog voltage signal and inputting the at least one analog voltage signal into the gating switch.
6. The multi-channel analog signal processing device according to claim 1, wherein: the analog-to-digital converter converts the second analog signal into the digital signal in a time-division multiplexing manner after receiving an enable signal sent by the controller; the shift register converts the serial control signal into the parallel control signal after receiving a trigger signal sent by the controller.
7. The multi-channel analog signal processing device according to claim 1, wherein: the controller sends the same clock signal to the shift register and the analog-to-digital converter.
8. The multi-path analog signal processing device according to claim 1, wherein The device further comprises: a first isolator isolating the analog-to-digital converter and the controller, and a second isolator isolating the controller and the shift register.