CN111277654A - Electrical terminal equipment and working method thereof - Google Patents
Electrical terminal equipment and working method thereof Download PDFInfo
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- CN111277654A CN111277654A CN202010068884.XA CN202010068884A CN111277654A CN 111277654 A CN111277654 A CN 111277654A CN 202010068884 A CN202010068884 A CN 202010068884A CN 111277654 A CN111277654 A CN 111277654A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/70—Photonic quantum communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
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Abstract
An electric terminal device and its working method, the radio frequency signal that the said photodetector outputs is fed back and input to Mach-Zehnder electro-optic intensity modulator after the said first radio frequency amplifier and second radio frequency amplifier is amplified, finish the generation of the tunable microwave signal of the frequency; and the electric signal output by the photoelectric detector is transmitted to the PLC, and the PLC transmits the electric signal to a cloud server in the 3G network through the 3G module for display. The hysteresis change of the 3G network at this time is detected by totaling the 3G network hysteresis during the preset interval. By combining with other structures or methods, the defects that the 3G network in the prior art is usually consumed for a longer time and is not favorable for the timeliness of the transmission of the electric signals output by the photoelectric detector are effectively avoided.
Description
Technical Field
The invention relates to the technical field of electric end equipment, in particular to electric end equipment and a working method thereof.
Background
In the process of implementing rf frequency tuning by microwave photonic method, an electrical end device is often used, and the electrical end device includes a first rf amplifier, an rf power divider, a second rf amplifier and a low noise amplifier, which are electrically connected in sequence. The low noise amplifier is connected with a radio frequency input port of a Mach-Zehnder electro-optic intensity modulator of optical end equipment, and an output end of a photoelectric detector of the optical end equipment is connected with an input end of the first radio frequency amplifier.
Thus, the photodetector generates a radio frequency signal; and the output radio frequency signal is amplified by the first radio frequency amplifier and the second radio frequency amplifier and then fed back to the Mach-Zehnder electro-optic intensity modulator to finish radio frequency tuning.
The development of the internet of things technology is accompanied, the remote monitoring of the electric signals output by the photoelectric detector is more and more mature, specifically, the output end of the photoelectric detector is connected with the input end of the PLC, the PLC is connected with the cloud server in the 3G network through the 3G module, and the cloud server can be a computer, so that the electric signals output by the photoelectric detector can be transmitted to the PLC, and the PLC transmits the electric signals to the cloud server in the 3G network through the 3G module for display, so that the purpose of remote monitoring is achieved.
However, since the available network speed of the 3G network itself fluctuates all the time, if the amount of the transmitted electrical signal output by the photodetector is higher than the available network speed, the 3G network may be blocked, and if the amount of the transmitted electrical signal output by the photodetector is not enough, the transmission of the electrical signal output by the photodetector may not be smooth, which may impair the performance of the electrical signal output by the photodetector, and may not be favorable for the performance of another task applied on the 3G network, and if the amount of the transmitted electrical signal output by the photodetector is smaller than the network speed at this time, the 3G network may not be well applied, and the performance of the electrical signal output by the photodetector may not be optimal.
To overcome the fluctuation state of the 3G network, the PLC can detect the 3G network at the moment, timely determine the blockage condition of the 3G network at the moment by means of the 3G network condition, and allocate the network speed for transmitting the electric signals, so that the electric signals output by the transmitted photoelectric detector can be changed by means of the network speed of the 3G network, the blockage is not overcome, and the network speed is suitable for being applied.
However, in the conventional 3G network detection mode, whether the 3G network is blocked or not is determined by detecting whether the 3G network has the lost electrical signal or not, namely, the 3G network has the lost electrical signal which serves as a mark for the 3G network blockage; at present, during the transmission of the electric signals output by the photoelectric detector, the network speed for transmitting the electric signals is continuously increased, if the electric signals are lost by the 3G network, the network speed for transmitting the electric signals is weakened, and the 3G network detection mode is often deployed after the 3G network is blocked to hopefully overcome the danger of blocking, namely, firstly, the 3G network is damaged, and then maintenance is performed after the damage is detected; it is currently not possible to reduce the wire speed used to transmit electrical signals in advance to overcome such impairments, in the face of 3G wires with a not small wire speed, since such impairments can occur efficiently and can be reduced efficiently, even if such penalties are allowable; however, in the case of a low network speed, before the 3G network loses the electrical signal, the 3G network is already in a blocking condition with a small delay, such delay usually reaches 25S, and the recovery of the delay usually consumes a longer time, which is very unfavorable for the timeliness of the transmission of the electrical signal output by the photodetector.
Disclosure of Invention
In order to solve the problems, the invention provides an electric terminal device and a working method thereof, which effectively overcome the defects that the 3G network in the prior art is usually consumed for a longer time and is not favorable for the timeliness of the transmission of the electric signal output by the photoelectric detector.
In order to overcome the defects in the prior art, the invention provides a solution for an electric terminal device and a working method thereof, which comprises the following steps:
an operating method of an electric end device comprises the following steps:
the radio frequency signal output by the photodetector 9 is amplified by the first radio frequency amplifier 10 and the second radio frequency amplifier 12 and fed back to the mach-zehnder electro-optic intensity modulator 3 to complete the generation of the frequency tunable microwave signal;
and the electric signal output by the photoelectric detector is transmitted to the PLC, and the PLC transmits the electric signal to a cloud server in the 3G network through the 3G module for display.
The method for transmitting the electric signal to the cloud server in the 3G network through the 3G module by the PLC programmable controller comprises the following processes executed in sequence:
t-1, detecting the hysteresis change of the 3G network at the moment through the 3G network hysteresis in the preset interval period;
the 3G network delay is the time length from transmitting the information of the electric signal output by the photoelectric detector to the cloud server in the 3G network to receiving the response information of the cloud server in the 3G network; the hysteresis change of the 3G network here is a 3G network hysteresis representing a certain time point, and the variation situation of the 3G network hysteresis at the previous time point, that is, the hysteresis change of the 3G network can be set as a sort of screening operation, and the PLC programmable controller for transmitting the electric signal here can find the hysteresis change of the 3G network at this time through the variation trend of the 3G network hysteresis in a total preset interval period.
For 3G network hysteresis summing up a pair of successive points in time, the hysteresis variation of the 3G network at this time can be deduced through the following formula (1):
k(l)＝m(l)–m(l-1)+s×k(l-1) (1)
here, k (l) is a 3G network hysteresis variation at the l-th time point, m (l) is a 3G network hysteresis at the l-th time point, s is an importance coefficient set in advance, and s is greater than zero and smaller than one.
T-2, detecting the situation of the 3G network blockage situation by means of the hysteresis change of the 3G network at the moment, and determining that the 3G network is not blocked at the moment by means of the situation of the 3G network blockage situation;
comparing the delay variation of the 3G network with the delay variation of the 3G network at the previous time point, and if the recently calculated delay variation of the network at the current time is higher than the sum of the delay variations, recognizing that the 3G network is blocked; or the hysteresis change of the 3G network at the moment can be checked whether to accord with a preset critical number, if so, the 3G network is blocked, so that the hysteresis change of the 3G network is suddenly increased, and the 3G network is determined to be blocked.
Can be determined by identifying formula (2):
k(l)>k(m)+t (2)
if the current time is not satisfied, the 3G network is determined to be blocked, wherein k (l) is the 3G network hysteresis change of the ith time point, k (m) is the 3G network hysteresis change of the mth time point, the ith time point is the time point, l > m, and t is a preset blocking critical number;
l, m and t may be positive integers.
In the formula (2), the value obtained by subtracting l and m is less than 26, namely the value obtained by subtracting l and m can be one, namely m is the previous time point of l;
t is not constrained and depends on the particular case.
When the equation (2) is satisfied, namely when the hysteresis variation of the 3G network at the time is higher than the hysteresis variation value of the 3G network at the previous time m and is higher than the threshold number T for blocking, the 3G network is determined to be blocked at the time, and T-3 is executed; otherwise, when the formula (2) is not satisfied, it is determined that the 3G network is not blocked.
T-3, when the 3G network is determined to be blocked, the network speed for transmitting the electric signals for transmitting the data is reduced.
Further, the network speed for transmitting the electric signals at the moment can be directly reduced by half, namely the network speed for transmitting the electric signals for transmitting data at the moment is reduced to the original half; or comparing the half network speed for transmitting the electric signals with the network speed for receiving the electric signals at the moment, and selecting the larger network speed of the half network speed for transmitting the electric signals at the moment and the network speed for receiving the electric signals at the moment as the current network speed for transmitting the electric signals; or may further comprise constructing a transfer queue for constraining the network speed for transferring electrical signals for a short time, the capacity of the transfer queue being the value of the multiplication of the received network speed at that time and the 3G network latency at that time.
The T-3 may further include: when the PLC for transmitting the electric signal detects that the information capacity of the electric signal output by the photoelectric detector which does not respond is consistent with the transmission queue capacity, the electric signal output by the subsequent photoelectric detector is not transmitted. When the T-1 determines that the 3G network is not blocked, the data transmission mode at the moment can be positioned, and the allocation is not executed.
After the network speed for transmitting the electric signals of the data transmission at the moment is reduced, the situation of the 3G network blockage situation is detected through the 3G network blockage detection mode by means of the hysteresis change of the 3G network at the moment, and when the 3G network is not blocked, the network speed for transmitting the electric signals can be actively increased according to the original electric signal transmission mode or according to specific conditions.
The electric terminal equipment comprises a first radio frequency amplifier 10, a radio frequency power divider 11, a second radio frequency amplifier 12 and a low noise amplifier 13 which are electrically connected in sequence;
the low noise amplifier 13 is connected with a radio frequency input port of a mach-zehnder electro-optic intensity modulator 3 of an optical end device, and an output end of a photoelectric detector 9 of the optical end device is connected with an input end of a first radio frequency amplifier 10;
the output end of the photoelectric detector is connected with the input end of the PLC, and the PLC is connected with a cloud server in a 3G network through a 3G module.
The working network speed of the Mach-Zehnder electro-optic intensity modulator 3 is 40 GHz;
the photoelectric detector 9 adopts a photoelectric detector with the working network speed of more than 40 GHz;
the first radio frequency amplifier 10 and the second radio frequency amplifier 12 both adopt power amplifiers with maximum output power larger than 1W;
the radio frequency power divider 11 adopts a 50:50 radio frequency power divider;
the low noise amplifier 13 adopts a low noise amplifier with a gain of 20dB and a noise coefficient less than 4 dB.
The electric terminal equipment also comprises a hysteresis change detecting unit, a detecting and identifying unit and a network speed weakening unit which are applied to the PLC programmable controller, wherein the network speed weakening unit is used for transmitting electric signals
The hysteresis change detecting unit is used for detecting the hysteresis change of the 3G network at the moment through the 3G network hysteresis in the preset interval period;
the detecting and identifying unit is used for detecting the situation of the 3G network blockage situation according to the hysteresis change of the 3G network at the moment, and identifying that the 3G network is not blocked at the moment according to the situation of the 3G network blockage situation;
the network speed weakening unit for transmitting the electric signals is used for reducing the network speed for transmitting the electric signals for transmitting data at the moment when the 3G network is judged to be blocked.
The probe identification unit may be further configured to:
by identifying formula (2):
k(l)>k(m)+t (2)
if the current time is not satisfied, the 3G network is determined to be blocked, wherein k (l) is the 3G network hysteresis change of the ith time point, k (m) is the 3G network hysteresis change of the mth time point, the ith time point is the time point, l > m, and t is a preset blocking critical number;
l, m and t may be positive integers.
The hysteresis change investigation unit may be further configured to:
the hysteresis variation of the 3G network at this time is derived by the following formula (1):
k(l)＝m(l)–m(l-1)+s×k(l-1) (1)
here, k (l) is a 3G network hysteresis variation at the l-th time point, m (l) is a 3G network hysteresis at the l-th time point, s is an importance coefficient set in advance, and s is greater than zero and smaller than one.
The wire speed weakening unit for transmitting electrical signals can be used for:
when the 3G network is determined to be blocked, comparing the half network speed for transmitting the electric signals and the network speed for receiving the electric signals at the moment, and selecting the network speed which is larger than the half network speed for transmitting the electric signals and the network speed for receiving the electric signals at the moment as the current network speed for transmitting the electric signals.
The electric end equipment also comprises a queue creating unit applied to the PLC, and the queue creating unit is used for constructing a transmission queue for restricting the network speed for transmitting the electric signals for a short time when the 3G network is determined to be blocked, and the capacity of the transmission queue is a value obtained by multiplying the received network speed at the time and the delay of the 3G network at the time.
The invention has the beneficial effects that:
the invention detects the situation of 3G network blockage by detecting the hysteresis change of the 3G network, when the situation of the 3G network blockage situation is used for determining that the 3G network is blocked, the network speed for transmitting the electric signals for transmitting the data at the time is reduced, can recognize the 3G network is blocked in advance before the 3G network is blocked, achieves the purpose of allocating the network speed for transmitting the electric signals in advance, overcomes the defects that the reduction time of the blocked 3G network in the 3G network with low network speed is not short and the transmission performance of the electric signals output by the photoelectric detector is not facilitated at present, in addition, by constructing a transmission queue for restricting the network speed for transmitting the electric signals in a short time, the problem of poor transmission of the 3G network during the detection period can be solved, the frequency of unsmooth transmission of the electric signals output by the photoelectric detector can be reduced, and the timeliness and smoothness of the transmission of the electric signals output by the photoelectric detector can be ensured.
Drawings
Fig. 1 is a partial connection structure diagram of an electric terminal device of the present invention.
Fig. 2 is a flowchart of a method for the PLC to transmit the electrical signal to a cloud server in a 3G network via a 3G module according to the present invention.
Detailed Description
The invention will be further described with reference to the following figures and examples.
As shown in fig. 1-2, the method for operating an electric end device includes:
the radio frequency signal output by the photodetector 9 is amplified by the first radio frequency amplifier 10 and the second radio frequency amplifier 12 and fed back to the mach-zehnder electro-optic intensity modulator 3 to complete the generation of the frequency tunable microwave signal;
the electric signal output by the photoelectric detector is transmitted to the PLC, and the PLC transmits the electric signal to a cloud server in a 3G network through the 3G module for display, so that the aim of remote monitoring is fulfilled.
The method for transmitting the electric signal to the cloud server in the 3G network through the 3G module by the PLC programmable controller comprises the following processes executed in sequence:
t-1, detecting the hysteresis change of the 3G network at the moment through the 3G network hysteresis in the preset interval period;
further, for transmitting the electrical signal output by the photodetector, the 3G network latency is a time period from transmitting information of the electrical signal output by the photodetector to the cloud server in the 3G network to receiving response information of the cloud server in the 3G network; the hysteresis change of the 3G network here is a 3G network hysteresis representing a certain time point, and the variation situation of the 3G network hysteresis at the previous time point, that is, the hysteresis change of the 3G network can be set as a sort of screening operation, and the PLC programmable controller for transmitting the electric signal here can find the hysteresis change of the 3G network at this time through the variation trend of the 3G network hysteresis in a total preset interval period.
Further, for 3G network hysteresis summing up a pair of successive points in time, the hysteresis variation of the 3G network at this time can be derived by the following formula (1):
k(l)＝m(l)–m(l-1)+s×k(l-1) (1)
here, k (l) is a 3G network hysteresis variation at the l-th time point, m (l) is a 3G network hysteresis at the l-th time point, s is an importance coefficient set in advance, and s is greater than zero and smaller than one.
Obviously, the 3G network hysteresis change k (1) at the first time point may be zero, so that the 3G network hysteresis change k (2) at the later time point is m (2) -m (1) + sxk (1), that is, k (2) is m (2) -m (1).
T-2, detecting the situation of the 3G network blockage situation by means of the hysteresis change of the 3G network at the moment, and determining that the 3G network is not blocked at the moment by means of the situation of the 3G network blockage situation;
furthermore, the hysteresis change of the 3G network at the moment and the hysteresis change of the 3G network at the previous moment can be compared and checked, and if the latest calculated hysteresis change of the network at the moment is higher than the previous sum, the 3G network is determined to be blocked; or the hysteresis change of the 3G network at the moment can be checked whether to accord with a preset critical number, if so, the 3G network is blocked, so that the hysteresis change of the 3G network is suddenly increased, and the 3G network is determined to be blocked.
Further, the following can be obtained by identifying formula (2):
k(l)>k(m)+t (2)
if the current time is not satisfied, the 3G network is determined to be blocked, wherein k (l) is the 3G network hysteresis change of the ith time point, k (m) is the 3G network hysteresis change of the mth time point, the ith time point is the time point, l > m, and t is a preset blocking critical number;
it is obvious that l, m and t may be positive integers.
Further, in the formula (2), the value obtained by subtracting l and m is smaller than 26, that is, the value obtained by subtracting l and m can be one, that is, m is the previous time point of l;
t is not constrained and depends on the particular case.
When the equation (2) is satisfied, namely when the hysteresis variation of the 3G network at the time is higher than the hysteresis variation value of the 3G network at the previous time m and is higher than the threshold number T for blocking, the 3G network is determined to be blocked at the time, and T-3 is executed; otherwise, when the formula (2) is not satisfied, it is determined that the 3G network is not blocked.
T-3, when the 3G network is determined to be blocked, the network speed for transmitting the electric signals for transmitting the data is reduced.
Further, the network speed for transmitting the electric signals at the moment can be directly reduced by half, namely the network speed for transmitting the electric signals for transmitting data at the moment is reduced to the original half; or comparing the half network speed for transmitting the electric signals with the network speed for receiving the electric signals at the moment, and selecting the larger network speed of the half network speed for transmitting the electric signals at the moment and the network speed for receiving the electric signals at the moment as the current network speed for transmitting the electric signals; or may further comprise a transfer queue configured to constrain the wire speed for transferring electrical signals for a short time, the transfer queue having a capacity that is a value of multiplication of the wire speed accepted at that time and the hysteresis of the 3G net at that time, whereby the problem of the 3G net being poor during detection can be handled.
Further, the T-3 may further include: when the PLC for transmitting the electric signal detects that the information capacity of the electric signal output by the photoelectric detector which does not respond is consistent with the transmission queue capacity, the electric signal output by the subsequent photoelectric detector is not transmitted. When the T-1 determines that the 3G network is not blocked, the data transmission mode at the moment can be positioned, and the allocation is not executed.
Furthermore, after the network speed for transmitting the electric signal of the data transmission at the moment is reduced, the 3G network blockage recognition mode is used for detecting the situation of the 3G network blockage situation by means of the hysteresis change of the 3G network at the moment, and when the 3G network is recognized not to be blocked, the network speed for transmitting the electric signal can be actively increased according to the original electric signal transmission mode or according to specific situations.
By detecting the hysteresis change of the 3G network, the situation of the 3G network blockage condition is detected by the hysteresis change of the 3G network, when the situation of the 3G network blockage situation is used for determining that the 3G network is blocked, the network speed for transmitting the electric signals for transmitting the data at the time is reduced, can recognize the 3G network is blocked in advance before the 3G network is blocked, achieves the purpose of allocating the network speed for transmitting the electric signals in advance, overcomes the defects that the reduction time of the blocked 3G network in the 3G network with low network speed is not short and the transmission performance of the electric signals output by the photoelectric detector is not facilitated at present, in addition, by constructing a transmission queue for restricting the network speed for transmitting the electric signals in a short time, the problem of poor transmission of the 3G network during the detection period can be solved, the frequency of unsmooth transmission of the electric signals output by the photoelectric detector can be reduced, and the timeliness and smoothness of the transmission of the electric signals output by the photoelectric detector can be ensured.
The electric terminal equipment comprises a first radio frequency amplifier 10, a radio frequency power divider 11, a second radio frequency amplifier 12 and a low noise amplifier 13 which are electrically connected in sequence; here, the rf power splitter is used to split the transmitted rf signal, and a part of the signal is fed back to the optical link for further transmission, and a part of the signal is used to generate a frequency tunable signal or for direct measurement. The low noise amplifier is used to provide gain, because the additional devices bring about a certain insertion loss, and it is necessary to provide a certain gain in the link to offset the insertion loss.
The low noise amplifier 13 is connected with a radio frequency input port of a mach-zehnder electro-optic intensity modulator 3 of an optical end device, and an output end of a photoelectric detector 9 of the optical end device is connected with an input end of a first radio frequency amplifier 10;
the development of the internet of things technology is accompanied, the remote monitoring of the electric signals output by the photoelectric detector is more and more mature, specifically, the output end of the photoelectric detector is connected with the input end of the PLC, the PLC is connected with the cloud server in the 3G network through the 3G module, and the cloud server can be an arithmetic machine, so that the electric signals output by the photoelectric detector can be transmitted to the PLC, and the PLC transmits the electric signals to the cloud server in the 3G network through the 3G module for display, so that the purpose of remote monitoring is achieved.
The working network speed of the Mach-Zehnder electro-optic intensity modulator 3 is 40 GHz;
the photoelectric detector 9 adopts a photoelectric detector with the working network speed of more than 40 GHz;
the first radio frequency amplifier 10 and the second radio frequency amplifier 12 both adopt power amplifiers with maximum output power larger than 1W;
the radio frequency power divider 11 adopts a 50:50 radio frequency power divider;
the low noise amplifier 13 adopts a low noise amplifier with a gain of 20dB and a noise coefficient less than 4 dB.
The electric terminal equipment also comprises a hysteresis change detecting unit, a detection confirming unit and a network speed weakening unit which are applied to the PLC, wherein the hysteresis change detecting unit is used for detecting the hysteresis change of the 3G network through the 3G network hysteresis which is summed up in a preset interval period;
the detecting and identifying unit is used for detecting the situation of the 3G network blockage situation according to the hysteresis change of the 3G network at the moment, and identifying that the 3G network is not blocked at the moment according to the situation of the 3G network blockage situation;
the network speed weakening unit for transmitting the electric signals is used for reducing the network speed for transmitting the electric signals for transmitting data at the moment when the 3G network is judged to be blocked.
Further, the probing determining unit may be further configured to:
by identifying formula (2):
k(l)>k(m)+t (2)
if the current time is not satisfied, the 3G network is determined to be blocked, wherein k (l) is the 3G network hysteresis change of the ith time point, k (m) is the 3G network hysteresis change of the mth time point, the ith time point is the time point, l > m, and t is a preset blocking critical number;
it is obvious that l, m and t may be positive integers.
Further, the hysteresis change detecting unit may be specifically configured to:
the hysteresis variation of the 3G network at this time is derived by the following formula (1):
k(l)＝m(l)–m(l-1)+s×k(l-1) (1)
here, k (l) is a 3G network hysteresis variation at the l-th time point, m (l) is a 3G network hysteresis at the l-th time point, s is an importance coefficient set in advance, and s is greater than zero and smaller than one.
The wire speed weakening unit for transmitting electrical signals can be used for:
when the 3G network is determined to be blocked, comparing the half network speed for transmitting the electric signals and the network speed for receiving the electric signals at the moment, and selecting the network speed which is larger than the half network speed for transmitting the electric signals and the network speed for receiving the electric signals at the moment as the current network speed for transmitting the electric signals.
The electric end equipment also comprises a queue creating unit applied to the PLC, and the queue creating unit is used for constructing a transmission queue for restricting the network speed for transmitting the electric signals for a short time when the 3G network is determined to be blocked, and the capacity of the transmission queue is a value obtained by multiplying the received network speed at the time and the delay of the 3G network at the time.
The present invention has been described in an illustrative manner by the embodiments, and it should be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, but is capable of various changes, modifications and substitutions without departing from the scope of the present invention.
Claims (10)
1. An operating method of an electric end device, comprising:
the radio frequency signal output by the photoelectric detector is amplified by the first radio frequency amplifier and the second radio frequency amplifier and then fed back to the Mach-Zehnder electro-optic intensity modulator to finish the generation of the frequency tunable microwave signal;
and the electric signal output by the photoelectric detector is transmitted to the PLC, and the PLC transmits the electric signal to a cloud server in the 3G network through the 3G module for display.
2. The method for operating the electric end equipment according to claim 1, wherein the method for the PLC to transmit the electric signal to the cloud server in the 3G network via the 3G module comprises the following steps:
t-1, detecting the hysteresis change of the 3G network at the moment through the 3G network hysteresis in the preset interval period;
t-2, detecting the situation of the 3G network blockage situation by means of the hysteresis change of the 3G network at the moment, and determining that the 3G network is not blocked at the moment by means of the situation of the 3G network blockage situation;
t-3, when the 3G network is determined to be blocked, the network speed for transmitting the electric signals for transmitting the data is reduced.
3. The method of claim 2, wherein the 3G network latency is a time period from transmitting information of the electrical signal output by the photodetector to the cloud server in the 3G network to receiving response information of the cloud server in the 3G network; the hysteresis change of the 3G network represents the 3G network hysteresis at a certain time point, and the change condition of the 3G network hysteresis at the previous time point, that is, the hysteresis change of the 3G network can be set as a type of screening operation, and the PLC programmable controller for transmitting the electric signal can find the hysteresis change of the 3G network at the moment through the change trend of the 3G network hysteresis in a preset interval period;
for 3G network hysteresis summing up a pair of successive points in time, the hysteresis variation of the 3G network at this time can be deduced through the following formula (1):
k(l)＝m(l)–m(l-1)+s×k(l-1) (1)
here, k (l) is a 3G network hysteresis variation at the l-th time point, m (l) is a 3G network hysteresis at the l-th time point, s is an importance coefficient set in advance, and s is greater than zero and smaller than one.
4. The method for operating the electric terminal equipment according to claim 2, wherein the mode for recognizing that the 3G network is not blocked at the time comprises the following steps:
comparing the delay variation of the 3G network with the delay variation of the 3G network at the previous time point, and if the recently calculated delay variation of the network at the current time is higher than the sum of the delay variations, recognizing that the 3G network is blocked; or whether the hysteresis change of the 3G network at the moment meets a preset critical number can be checked, if yes, the 3G network is blocked, so that the hysteresis change of the 3G network is increased suddenly, and the 3G network is determined to be blocked;
can be determined by identifying formula (2):
k(l)>k(m)+t(2)
if the current time is not satisfied, the 3G network is determined to be blocked, wherein k (l) is the 3G network hysteresis change of the ith time point, k (m) is the 3G network hysteresis change of the mth time point, the ith time point is the time point, l > m, and t is a preset blocking critical number;
l, m and t may be positive integers.
In the formula (2), the value obtained by subtracting l and m is less than 26, namely the value obtained by subtracting l and m can be one, namely m is the previous time point of l;
t is not restricted and the critical number is determined by the specific situation;
when the equation (2) is satisfied, namely when the hysteresis variation of the 3G network at the time is higher than the hysteresis variation value of the 3G network at the previous time m and is higher than the threshold number T for blocking, the 3G network is determined to be blocked at the time, and T-3 is executed; otherwise, when the formula (2) is not satisfied, it is determined that the 3G network is not blocked.
5. The method of operating an electrical end device according to claim 2, wherein the reducing the wire speed for transmitting electrical signals at which data is transmitted comprises:
the network speed for transmitting the electric signals can be directly reduced by half, namely the network speed for transmitting the electric signals for transmitting data at the moment is reduced to the original half; or comparing the half network speed for transmitting the electric signals with the network speed for receiving the electric signals at the moment, and selecting the larger network speed of the half network speed for transmitting the electric signals at the moment and the network speed for receiving the electric signals at the moment as the current network speed for transmitting the electric signals; or may further comprise constructing a transfer queue for constraining the network speed for transferring electrical signals for a short time, the capacity of the transfer queue being the value of the multiplication of the received network speed at that time and the 3G network latency at that time.
6. The operating method of the electric end equipment according to claim 2, wherein the T-3 further comprises: when the PLC for transmitting the electric signal detects that the information capacity of the electric signal output by the photoelectric detector which does not respond is consistent with the transmission queue capacity, the electric signal output by the subsequent photoelectric detector is not transmitted. When the T-1 determines that the 3G network is not blocked at the moment, the data transmission mode at the moment can be positioned, and the allocation is not executed;
after the network speed for transmitting the electric signals of the data transmission at the moment is reduced, the situation of the 3G network blockage situation is detected through the 3G network blockage detection mode by means of the hysteresis change of the 3G network at the moment, and when the 3G network is not blocked, the network speed for transmitting the electric signals can be actively increased according to the original electric signal transmission mode or according to specific conditions.
7. An electric terminal device is characterized by comprising a first radio frequency amplifier, a radio frequency power divider, a second radio frequency amplifier and a low noise amplifier which are electrically connected in sequence;
the low-noise amplifier is connected with a radio frequency input port of a Mach-Zehnder electro-optic intensity modulator of optical end equipment, and an output end of a photoelectric detector of the optical end equipment is connected with an input end of the first radio frequency amplifier;
the output end of the photoelectric detector is connected with the input end of the PLC, and the PLC is connected with a cloud server in a 3G network through a 3G module.
8. The electrical end equipment of claim 7 wherein the mach-zehnder electro-optic intensity modulator has an operating net speed of 40 GHz;
the photoelectric detector adopts a photoelectric detector with the working network speed of more than 40 GHz;
the first radio frequency amplifier and the second radio frequency amplifier both adopt power amplifiers with the maximum output power larger than 1W;
the radio frequency power divider adopts a 50:50 radio frequency power divider;
the low noise amplifier adopts a low noise amplifier with the gain of 20dB and the noise coefficient of less than 4 dB.
9. The electrical end equipment of claim 7 further comprising a hysteretic change detection unit, a detection unit and a network speed reduction unit for transmitting electrical signals for use in a PLC programmable controller, where
The hysteresis change detecting unit is used for detecting the hysteresis change of the 3G network at the moment through the 3G network hysteresis in the preset interval period;
the detecting and identifying unit is used for detecting the situation of the 3G network blockage situation according to the hysteresis change of the 3G network at the moment, and identifying that the 3G network is not blocked at the moment according to the situation of the 3G network blockage situation;
the network speed weakening unit for transmitting the electric signals is used for reducing the network speed for transmitting the electric signals for transmitting data at the moment when the 3G network is judged to be blocked.
10. The electrical end equipment of claim 9, wherein the probing and identifying unit is further operable to:
by identifying formula (2):
k(l)>k(m)+t (2)
if the current time is not satisfied, the 3G network is determined to be blocked, wherein k (l) is the 3G network hysteresis change of the ith time point, k (m) is the 3G network hysteresis change of the mth time point, the ith time point is the time point, l > m, and t is a preset blocking critical number;
l, m and t may be positive integers;
the hysteresis change investigation unit may be further configured to:
the hysteresis variation of the 3G network at this time is derived by the following formula (1):
k(l)＝m(l)–m(l-1)+s×k(l-1) (1)
here, k (l) is a 3G network hysteresis variation at the l-th time point, m (l) is a 3G network hysteresis at the l-th time point, s is an importance coefficient set in advance, and s is greater than zero and smaller than one;
the wire speed weakening unit for transmitting electrical signals can be used for:
when the 3G network is determined to be blocked, comparing the half network speed for transmitting the electric signals and the network speed for receiving the electric signals at the moment, and selecting the network speed which is larger than the half network speed for transmitting the electric signals at the moment and the network speed for receiving the electric signals at the moment as the current network speed for transmitting the electric signals;
the electric end equipment also comprises a queue creating unit applied to the PLC, and the queue creating unit is used for constructing a transmission queue for restricting the network speed for transmitting the electric signals for a short time when the 3G network is determined to be blocked, and the capacity of the transmission queue is a value obtained by multiplying the received network speed at the time and the delay of the 3G network at the time.
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