CN109450472B - Switch actuator and signal receiving circuit - Google Patents
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- CN109450472B CN109450472B CN201811532628.0A CN201811532628A CN109450472B CN 109450472 B CN109450472 B CN 109450472B CN 201811532628 A CN201811532628 A CN 201811532628A CN 109450472 B CN109450472 B CN 109450472B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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Abstract
The invention provides a switch actuator and a signal receiving circuit, wherein the switch actuator comprises a signal receiving circuit, and the signal receiving circuit comprises: a plurality of parallel first filtering units for receiving input signals from a low-voltage power line and filtering, wherein each first filtering unit filters out input signals with different frequencies respectively; and a plurality of signal extraction units connected in parallel for extracting transmission signals from the input signals, wherein each signal extraction unit extracts transmission signals of different frequencies from the filtered input signals, respectively. The switch executor and the signal receiving circuit adopt a multi-band synchronous matrix receiving mode, improve the receiving sensitivity of the power line carrier communication of the voltage, ensure reliable data transmission, avoid signal loss and obviously improve the communication distance.
Description
Technical Field
The invention relates to the field of signal processing, in particular to a switch actuator and a signal receiving circuit.
Background
Along with the development of society, a switch actuator is commonly used in the building industry or the automation industry and is used for converting a command sent by a user or intelligent equipment into the switching state of a relay, so that the on-off of a load circuit is controlled, and the purpose of changing the circuit state is achieved. Finished switch actuators currently available on the market generally use wired (bus structures) or wireless as data transmission paths, but data transmission using narrowband power line carriers is theoretically possible.
Among them, for the switch actuator adopting the wired communication manner, no matter what form (such as bus type, star type or composite topology) of the communication topology, the biggest disadvantage is to wire in the target deployment environment. Such requirements are almost unmet for those building environments that are already in operation. Even the building in the brand new construction, because the communication medium adopted by each building is different, the earlier design and engineering coordination have great difficulty.
However, for the switch actuator adopting the wireless communication mode, there are two main disadvantages: (1) Wireless signals are divergent, are subject to interference from malicious sources of interference in the air, and are not suitable for highly confidential units no matter how secure the protocol itself is, so-called non-physical isolation; (2) Radio waves are electromagnetic waves that have limited penetration into metal-containing buildings, such as basements, underground pipe galleries, etc., where networking of multiple devices is difficult.
For a switch actuator adopting a narrow-band power line carrier, firstly, the transmitted data is ensured to be correct; moreover, under the same transformer, the communication distance between the nodes can reach the range of hundreds of meters to thousands of meters, so that a plurality of buildings can be covered, and the communication range has networking value. The data transmission on the power line is extremely difficult, because the impedance of the low-voltage power network is not constant and varies along with the change of the load, and the harmonic wave, the surge and other interference on the power network are extremely large, so that the power line carrier networking is very difficult in reality.
In order to solve the above-mentioned problems and other problems, it is necessary to propose a novel switch actuator and signal receiving circuit to solve the existing technical problems.
Disclosure of Invention
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to overcome the problems existing at present, according to an aspect of the present invention, there is provided a switch actuator including a signal receiving circuit including: the first filtering units are connected in parallel and are used for receiving input signals through a voltage power line and filtering the input signals, and each first filtering unit is used for filtering out the input signals with different frequencies respectively; and a plurality of signal extraction units connected in parallel for extracting transmission signals from the input signals, wherein each signal extraction unit extracts transmission signals of different frequencies from the filtered input signals, respectively.
In one embodiment, each of the first filtering units is configured to filter out input signals of different frequencies at the same time point.
In an embodiment, each of the first filtering units is further configured to filter out the input signals of different frequencies at different points in time to form a matrix of the input signals.
In one embodiment, the signal receiving circuit further comprises a plurality of signal holding units connected in parallel between the first filtering unit and the signal extracting unit for holding the amplitude of the filtered input signal.
In one embodiment, the signal holding unit comprises an automatic gain control amplifier.
In one embodiment, the switch actuator further comprises a processing unit connected to the first filtering unit for controlling the bandwidth of the frequency band filtered by each of the plurality of first filtering units.
In an embodiment, the processing unit is further connected to the signal extraction unit for processing a plurality of the transmission signals to generate an output signal.
In one embodiment, the switch actuator further comprises a synchronization identification unit connected between the low voltage power line and the processing unit for identifying a synchronization signal in the input signal to determine a synchronization point.
In one embodiment, the first filtering unit comprises a band pass filter.
In one embodiment, the signal extraction unit comprises a demodulator.
In one embodiment, the switch actuator further comprises a signal transmitting circuit comprising a spreading unit, a signal coupling unit, a second filtering unit and a signal amplifying unit.
According to another aspect of the present invention, there is provided a signal receiving circuit including: the first filtering units are connected in parallel and are used for receiving input signals through a voltage power line and filtering the input signals, and each first filtering unit is used for filtering out the input signals with different frequencies respectively; and a plurality of signal extraction units for extracting transmission signals from the input signals, wherein each of the signal extraction units extracts transmission signals of different frequencies from the filtered input signals, respectively.
In one embodiment, each of the first filtering units is configured to filter out input signals of different frequencies at the same time point.
In an embodiment, further wherein each of said first filtering units is further adapted to filter out said input signals of different frequencies at different points in time to form a matrix of said input signals.
In one embodiment, the signal receiving circuit further comprises a plurality of signal holding units connected between the first filtering unit and the signal extracting unit for holding the amplitude of the filtered input signal.
In one embodiment, the signal holding unit comprises an automatic gain control amplifier.
In one embodiment, the first filtering unit comprises a band pass filter.
In one embodiment, the signal extraction unit comprises a demodulator.
The switch executor and the signal receiving circuit adopt a multi-band synchronous matrix receiving mode, improve the receiving sensitivity of the power line carrier communication of the voltage, ensure reliable data transmission, avoid signal loss and obviously improve the communication distance.
Drawings
The following drawings are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and their description to explain the principles of the invention.
In the accompanying drawings:
FIG. 1 is a block diagram of a switch actuator according to one embodiment of the invention;
FIG. 2 is a schematic diagram of the structure of a switch actuator according to one embodiment of the invention; and
fig. 3 is a graph of sampling time versus frequency for sampling points of a synchronous matrix reception technique.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.
It should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size of layers and regions, as well as the relative sizes, may be exaggerated for clarity. Like numbers refer to like elements throughout.
It will be understood that when an element or layer is referred to as being "on" …, "" adjacent to "…," "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected to or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on" …, "" directly adjacent to "…," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.
Spatially relative terms, such as "under …," "under …," "below," "under …," "above …," "above," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "under …" and "under …" may include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
In the following description, for the purpose of providing a thorough understanding of the present invention, detailed structures and steps are presented in order to illustrate the technical solution presented by the present invention. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.
In order to solve the above-described problems, the present invention provides a switch actuator including a signal receiving circuit including:
a plurality of first filtering units connected in parallel, which are used for receiving input signals through a low-voltage power line and filtering, wherein each first filtering unit filters out input signals with different frequencies; and
and the signal extraction units are connected in parallel and are used for extracting transmission signals, wherein each signal extraction unit extracts transmission signals with different frequencies from the filtered input signals.
The switch executor and the signal receiving circuit adopt a multi-band synchronous matrix receiving mode, improve the receiving sensitivity of the power line carrier communication of the voltage, ensure reliable data transmission, avoid losing signals and obviously improve the communication distance.
The switch actuator of the present invention will be described in detail with reference to specific embodiments.
Referring first to fig. 1, fig. 1 is a block diagram of a switch actuator 10 according to one embodiment of the present invention. As shown in fig. 1, the switch actuator 10 may include a signal receiving circuit 100, a signal transmitting circuit 200, and a processing unit 300.
Wherein the signal receiving circuit 100 is configured to receive an input signal from the signal generating device via the voltage power line and to extract a transmission signal therefrom. Wherein the signal generating means may include, but is not limited to, a stationary computer, a mobile computer, or a combination thereof. Exemplary stationary computers may include desktop computers, workstations, personal computers, thin clients, terminals, gaming machines, personal Video Recorders (PVRs), set-top boxes, and the like. Exemplary mobile computers may include notebook computers, tablet computers, wearable computers, implanted computing devices, telecommunications devices, smart phones, automotive computers, personal Digital Assistants (PDAs), portable gaming devices, media players, cameras, and the like.
In the invention, the power line can be a power supply line used in the daily life building of residents, and can also be a 380V industrial power line and the like. The power supply line may be a non-polar power line, for example.
Therefore, the switch actuator of the present invention can realize the data transmission between the signal generating device and the signal receiving circuit 100 only by the original power transmission line in the building, without any other device. The original low-voltage power line is adopted, so that the arrangement of a special signal transmission line can be omitted. In addition, the method of the nonpolar power line is added, so that the installation and construction can be further optimized, and the construction is more convenient and quicker.
Referring now to fig. 2, fig. 2 is a schematic diagram of the structure of a switch actuator 10 according to one embodiment of the present invention. Specifically, the signal receiving circuit 100 may include a first filtering unit 110, a signal holding unit 120, and a signal extracting unit 130. The first filtering unit 110 is connected to the signal generating device through a low voltage power line, and is configured to receive an input signal through the low voltage power line and filter the input signal. Since many interference signals exist in the signal transmitted by the voltage power line, in order to improve the receiving sensitivity and ensure the data transmission quality, for example, a synchronous matrix receiving technology may be used to receive the signal. For ease of understanding, the synchronization matrix reception technique is briefly described below.
Referring now to fig. 3, fig. 3 is a graph of sampling time versus frequency for sampling points of a synchronous matrix reception technique. As shown in fig. 3, where t0 is the synchronization start time; t1, t2, t3, t4 are different sampling time points within the frequency band f, f1, f2, f3 are fundamental frequencies of different frequency bands. As can be seen from fig. 2, the sampling manner of the synchronization matrix receiving technique is: at a certain time point, sampling data in different frequency bands to obtain a group of data, and then at different time points, sampling the data in different frequency bands to obtain a plurality of groups of data, so that the plurality of groups of data form a data matrix to ensure the reliability of data transmission.
The synchronous matrix receiving technology has the advantages that: the load of the low-voltage power grid is continuously and dynamically changed, so that the impedance of the low-voltage power grid is also continuously and dynamically changed, signals transmitted by the low-voltage power grid comprise useful signals and interference signals, but at a specific time point, the interference signals in a certain frequency band are generally weaker, the energy level is lower, the useful signals are stronger and the energy level is higher, and therefore, the receiving reliability is ensured by the mode of simultaneous sampling from the time domain to the frequency domain.
Based on the synchronization matrix reception technique, the first filtering unit 110 of the present invention includes a plurality of first filtering units connected in parallel as a plurality of frequency bands for receiving an input signal. The first filtering units work on different frequency bands to filter out input signals with different frequencies at the same time point respectively, then sampling is carried out at different time points, and input signals with different frequencies at different time points are filtered out to form a matrix of the input signals.
For example, the bandwidth of the frequency band in which each of the first filtering units operates may be preset. Illustratively, the first filtering unit 110 may be coupled to the processing unit 300 such that the pre-setting may be accomplished by the processing unit 300.
The first filtering unit 110 may be a band pass filter, a band stop filter, or the like, as long as a filter filtering out input signals of different frequency bands can be implemented, which is not limited by the present invention. Preferably, the first filtering unit 110 is a band pass filter.
The signal holding unit 120 is connected between the first filtering unit 110 and the signal extracting unit 130, and is used for holding the amplitude of the filtered input signal. Illustratively, the signal holding unit 120 may include a plurality of parallel signal holding units corresponding to the plurality of parallel first filtering units 110 one by one, for receiving filtered input signals of different frequencies from the corresponding first filtering units 110, and holding the amplitude of the input signals within a certain range using an effective combination of linear amplification and compression amplification for subsequent processing. Specifically, when the input signal is a weak signal, the linear amplification circuit operates to increase the amplitude of the input signal; when the input signal is a strong signal, the compression amplifying circuit is started to reduce the amplitude of the input signal.
Illustratively, the signal holding unit 120 may include an automatic gain control amplifier or the like. It should be noted that the signal holding unit 120 may also include other circuits or logic capable of performing automatic gain control, which is not limited by the present invention.
Wherein the signal extraction unit 130 is connected between the signal holding unit 120 and the processing unit 300, for extracting a transmission signal from the input signal, and transmitting the extracted transmission signal to the processing unit 300. Illustratively, the signal extraction unit 130 may include a plurality of parallel signal extraction units in one-to-one correspondence with the plurality of parallel signal holding units 120, each of which extracts transmission signals of different frequencies from the filtered input signals, respectively.
Illustratively, the signal extraction unit 130 may include a demodulator. It should be noted that the signal extraction unit 130 may also include other devices, circuits, or logic capable of signal extraction, which are not limited by the present invention.
The processing unit 300 is used for event processing and task scheduling, for example, the processing unit 300 may be used for controlling the bandwidth of the frequency band filtered by each first filtering unit 110, and for calculating, processing the extracted transmission signals with different frequencies to generate output signals, and so on.
By way of example, processing unit 300 may comprise a microprocessor, signal processor, application specific integrated circuit, application specific standard product, complex programmable logic device, or the like. Preferably, the processing unit 300 comprises a microcontroller.
The signal transmitting circuit 200 is connected to the processing unit 300, and is configured to perform a series of processes on an output signal generated by the processing unit 300 and transmit the processed signal to a controlled component. Specifically, the signal transmission circuit 200 may include a spreading unit 210, a signal coupling unit 220, a second filtering unit 230, a signal amplifying unit 240, and the like. Illustratively, the spreading unit 210 may include a direct sequence spreader for direct sequence spreading the output signal. Illustratively, the signal coupling unit 220 may include a modulator for modulating the output signal onto a plurality of frequency bands for transmission. The second filtering unit 230 may include a low-pass filter for low-pass filtering the modulated signal. Illustratively, the signal amplification unit 240 may include an amplifier for amplifying the output signal for transmission.
In one embodiment of the present invention, the switch actuator 10 may further comprise a synchronization identifying unit 400 connected between the voltage power line and the processing unit 300 for identifying a synchronization signal in the input signal to determine a synchronization point.
The switch actuator has the beneficial effects that:
(1) The switch executor of the invention adopts a narrow-band power line carrier technology as a communication link, adopts a full hardware structure to receive signals in different frequency bands through a synchronous matrix receiving technology, can bypass a certain single-band attenuation caused by impedance change, and simultaneously intensively samples a plurality of frequency bands for a plurality of times in a time far smaller than the signal change rate, thereby effectively filtering high-frequency alternating noise, and ensuring the receiving reliability in a mode of simultaneously sampling from a time domain to a frequency domain.
(2) Because signals are demodulated in different frequency bands and weighted according to a certain rule, transmission signals mixed in noise can be separated, and the receiving sensitivity of the voltage power line carrier communication is greatly improved.
(3) For signals with different frequencies, the low-voltage power line can show different impedance characteristics, and the multi-band synchronous matrix receiving mode can obtain a transmission signal load under a specific moment and can not cause signal loss due to dynamic change of impedance, so that the communication distance suitable for the switch actuator provided by the invention is obviously improved compared with other switch actuators adopting low-voltage power line carrier transmission.
According to another embodiment of the present invention, there is also provided a signal receiving circuit for receiving an input signal from a signal generating device through a low voltage power line and extracting a transmission signal therefrom.
Wherein the signal generating means may include, but is not limited to, a stationary computer, a mobile computer, or a combination thereof. Exemplary stationary computers may include desktop computers, workstations, personal computers, thin clients, terminals, gaming machines, personal Video Recorders (PVRs), set-top boxes, and the like. Exemplary mobile computers may include notebook computers, tablet computers, wearable computers, implanted computing devices, telecommunications devices, smart phones, automotive computers, personal Data Assistants (PDAs), portable gaming devices, media players, cameras, and the like.
In the invention, the power line can be a power supply line used in the daily life building of residents, and can also be a 380V industrial power line and the like. The power supply line may be a non-polar power line, for example.
Therefore, the switch actuator of the present invention can realize the data transmission between the signal generating device and the signal receiving circuit 100 only by the original power transmission line in the building, without any other device. The original low-voltage power line is adopted, so that the arrangement of a special signal transmission line can be omitted. In addition, the method of the nonpolar power line is added, so that the installation and construction can be further optimized, and the construction is more convenient and quicker.
Specifically, the signal receiving circuit may include a first filtering unit, a signal holding unit, and a signal extracting unit. The first filtering unit is connected with the signal generating device through a low-voltage power line and is used for receiving an input signal through the low-voltage power line and filtering the input signal. Since many interference signals exist in the signal transmitted by the voltage power line, in order to improve the receiving sensitivity, the data transmission quality is ensured, and for example, a synchronous matrix receiving technology may be adopted. The sampling mode of the synchronous matrix receiving technology is as follows: at a certain time point, sampling data in different frequency bands to obtain a group of data, and then at different time points, sampling the data in different frequency bands to obtain a plurality of groups of data, so that the plurality of groups of data form a data matrix to ensure the reliability of data transmission.
The synchronous matrix receiving technology has the advantages that: the load of the low-voltage power grid is continuously and dynamically changed, so that the impedance of the low-voltage power grid is also continuously and dynamically changed, signals transmitted by the low-voltage power grid comprise useful signals and interference signals, but at a specific time point, the interference signals in a certain frequency band are generally weaker, the energy level is lower, the useful signals are stronger and the energy level is higher, and therefore, the receiving reliability is ensured by the mode of simultaneous sampling from the time domain to the frequency domain.
Based on the synchronous matrix receiving technology, the first filtering unit of the present invention comprises a plurality of first filtering units connected in parallel as a plurality of frequency bands for receiving an input signal. The first filtering units work on different frequency bands to filter out input signals with different frequencies at the same time point respectively, then sampling is carried out at different time points, and input signals with different frequencies at different time points are filtered out to form a matrix of the input signals.
For example, the bandwidth of the frequency band in which each of the first filtering units operates may be preset.
The first filtering unit may be a band pass filter, a band stop filter, or the like, as long as a filter that filters out input signals of different frequency bands can be implemented, which is not limited by the present invention. Preferably, the first filtering unit is a band pass filter.
The signal holding unit is connected between the first filtering unit and the signal extracting unit and is used for holding the amplitude of the filtered input signal. The signal holding unit may include a plurality of parallel signal holding units corresponding to the plurality of parallel first filtering units one by one, for receiving the filtered input signals of different frequencies from the corresponding first filtering units, and holding the amplitude of the input signals within a certain range using an effective combination of linear amplification and compression amplification for subsequent processing. Specifically, when the input signal is a weak signal, the linear amplification circuit operates to increase the amplitude of the input signal; when the input signal is a strong signal, the compression amplifying circuit is started to reduce the amplitude of the input signal.
Illustratively, the signal holding unit may include an automatic gain control amplifier or the like. It should be noted that the signal holding unit may also include other circuits or logic capable of automatic gain control, which is not limited by the present invention.
The signal extraction unit is connected to the signal holding unit and is used for extracting a transmission signal from the input signal and transmitting the extracted transmission signal to the processing unit for processing. The signal extraction unit may include a plurality of parallel signal extraction units in one-to-one correspondence with the plurality of parallel signal holding units, each of the signal extraction units respectively extracting transmission signals of different frequencies from the filtered input signals.
The signal extraction unit may comprise a demodulator, for example. It should be noted that the signal extraction unit may also include other devices, circuits or logic capable of signal extraction, which the present invention is not limited to.
The signal receiving circuit according to the embodiment adopts a narrow-band power line carrier technology as a communication link, adopts a full hardware structure to receive signals in different frequency bands through a synchronous matrix receiving technology, can bypass a certain single-band attenuation caused by impedance change, simultaneously intensively samples a plurality of frequency bands for a plurality of times in a time far smaller than the signal change rate, can effectively filter high-frequency alternating noise, and ensures the receiving reliability in a mode of simultaneously sampling from a time domain to a frequency domain. And because signals are demodulated in different frequency bands and weighted according to a certain rule, transmission signals mixed in noise can be separated, and the receiving sensitivity of the power line carrier communication of the voltage is greatly improved. In addition, for signals with different frequencies, the low-voltage power line can show different impedance characteristics, and the multi-band synchronous matrix receiving mode can obtain a transmission signal load under a specific moment and can not cause signal loss due to dynamic change of impedance, so that the communication distance which can be realized by the signal receiving circuit of the embodiment is obviously improved compared with other signal receiving circuits adopting low-voltage power line carrier transmission.
The present invention has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the invention to the embodiments described. In addition, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the invention, which variations and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, e.g., the division of the elements is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another device, or some features may be omitted or not performed.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in order to streamline the invention and aid in understanding one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the invention. However, the method of the present invention should not be construed as reflecting the following intent: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be combined in any combination, except combinations where the features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
Various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that some or all of the functions of some of the modules in an item analysis device according to embodiments of the present invention may be implemented in practice using a microprocessor or Digital Signal Processor (DSP). The present invention can also be implemented as an apparatus program (e.g., a computer program and a computer program product) for performing a portion or all of the methods described herein. Such a program embodying the present invention may be stored on a computer readable medium, or may have the form of one or more signals. Such signals may be downloaded from an internet website, provided on a carrier signal, or provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
The foregoing description is merely illustrative of specific embodiments of the present invention and the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present invention. The protection scope of the invention is subject to the protection scope of the claims.
Claims (12)
1. A switch actuator comprising a signal receiving circuit, the signal receiving circuit comprising:
the first filtering units are connected in parallel and are used for receiving input signals through a voltage power line and filtering the input signals, and each first filtering unit is used for filtering out the input signals with different frequencies respectively; and
a plurality of parallel signal extraction units for extracting transmission signals from the input signals, wherein each signal extraction unit extracts transmission signals with different frequencies from the filtered input signals respectively;
the first filtering units are used for filtering out input signals with different frequencies at the same time point;
each of the first filtering units is further configured to filter out the input signals of different frequencies at different time points to form a matrix of the input signals;
the first filtering unit includes a band-pass filter.
2. The switch actuator of claim 1 wherein said signal receiving circuit further comprises a plurality of signal holding units connected in parallel between said first filtering unit and said signal extracting unit for holding the magnitude of the filtered input signal.
3. The switch actuator of claim 2 wherein said signal holding unit comprises an automatic gain control amplifier.
4. The switch actuator of claim 1 further comprising a processing unit coupled to the first filtering unit for controlling the bandwidth of the frequency band filtered by each of the plurality of first filtering units.
5. The switch actuator of claim 4 wherein said processing unit is further connected to said signal extraction unit for processing a plurality of said transmission signals to generate an output signal.
6. The switch actuator of claim 4 further comprising a synchronization identification unit connected between the low voltage power line and the processing unit for identifying a synchronization signal in the input signal to determine a synchronization point.
7. The switch actuator of claim 1 wherein the signal extraction unit comprises a demodulator.
8. The switch actuator of claim 1 further comprising a signal transmission circuit comprising a spreading unit, a signal coupling unit, a second filtering unit, and a signal amplifying unit.
9. A signal receiving circuit, the signal receiving circuit comprising:
the first filtering units are connected in parallel and are used for receiving input signals through a voltage power line and filtering the input signals, and each first filtering unit is used for filtering out the input signals with different frequencies respectively; and
a plurality of signal extraction units for extracting transmission signals from the input signals, wherein each signal extraction unit extracts transmission signals of different frequencies from the filtered input signals, respectively;
the first filtering units are used for filtering out input signals with different frequencies at the same time point;
each of the first filtering units is further configured to filter out the input signals of different frequencies at different time points to form a matrix of the input signals;
the first filtering unit includes a band-pass filter.
10. The signal receiving circuit of claim 9, further comprising a plurality of signal holding units connected between the first filtering unit and the signal extracting unit for holding the magnitude of the filtered input signal.
11. The signal receiving circuit of claim 10, wherein the signal holding unit comprises an automatic gain control amplifier.
12. The signal receiving circuit of claim 9, wherein the signal extraction unit comprises a demodulator.
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| CN201811532628.0A CN109450472B (en) | 2018-12-14 | 2018-12-14 | Switch actuator and signal receiving circuit |
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| CN201811532628.0A CN109450472B (en) | 2018-12-14 | 2018-12-14 | Switch actuator and signal receiving circuit |
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| CN109450472B true CN109450472B (en) | 2024-04-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110380757B (en) * | 2019-05-27 | 2021-12-21 | 上海感拓智能科技有限公司 | Self-adaptive power carrier communication device |
| CN112311421B (en) * | 2020-10-24 | 2022-02-01 | 青岛鼎信通讯股份有限公司 | Medium-voltage communication equipment receiving circuit based on AGC |
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