CN111736182B - Multi-path adjustable BDS/GPS time service device and time service method - Google Patents
Multi-path adjustable BDS/GPS time service device and time service method Download PDFInfo
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- CN111736182B CN111736182B CN202010733921.4A CN202010733921A CN111736182B CN 111736182 B CN111736182 B CN 111736182B CN 202010733921 A CN202010733921 A CN 202010733921A CN 111736182 B CN111736182 B CN 111736182B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
- G01S19/256—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to timing, e.g. time of week, code phase, timing offset
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/33—Multimode operation in different systems which transmit time stamped messages, e.g. GPS/GLONASS
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Abstract
The invention discloses a multi-path adjustable BDS/GPS time service device and a method thereof, wherein the device comprises a main control module, a 1+1 power supply access module, a plurality of radio frequency information sources, a radio frequency switch combining module, a radio frequency adjusting module, a radio frequency connecting module, a radio frequency information source analyzing and monitoring module and an interaction system, wherein the 1+1 power supply access module is electrically connected with the main control module; the plurality of radio frequency information sources are electrically connected with the main control module through the radio frequency switch combining module and are connected in parallel; the input end of the radio frequency adjusting module is connected with the main control module, the output end of the radio frequency adjusting module is electrically connected with the radio frequency connecting module, the radio frequency information source analyzing and monitoring module is respectively connected with the main control module and the radio frequency connecting module, and the radio frequency connecting module and the interactive system are both connected with the main control module. The device can automatically select the optimal satellite time service information source, and performs self-adaptive adjustment on each path of output signals, so that equipment can accurately obtain high-precision BDS/GPS time.
Description
Technical Field
The invention belongs to the technical field of mobile communication industry, and particularly relates to a multi-channel adjustable BDS/GPS time service device and a time service method.
Background
Time service means that devices in a communication network achieve synchronization between network devices by acquiring a uniform clock source signal, and a satellite-borne clock of a satellite is generally adopted as a clock source in the current mobile communication network. The Global Positioning System (GPS) in the united states and the BeiDou Navigation Satellite System (BDS) in our country have the capability of providing time for a mobile communication network.
In the field of communication and measurement, along with the development of science and technology, more and more devices are needed for time service in a machine room, and the machine room is tense at present, a large number of devices are concentrated in one machine room, the farthest distance between the devices is probably more than 300 meters, the original time service radio frequency shunt technology is simple and integrated in amplification attenuation and filtering, and the accurate adjustment of time service signals of 0-1000 meters (or more) between a time service terminal and the devices cannot be met. The signal intensity is too high, so that a device time service chip close to the time service terminal is burnt; the signal intensity is too low, so that the time service signal cannot be detected by the equipment close to the time service terminal.
In chinese patent document CN109991838A, a big dipper short message based master control time service device, system and method are disclosed, which are mainly applied to the control of time service devices after no network in grasslands, oceans and remote areas or after network failure due to earthquake, flood, etc., and the emphasis and main description is to provide time service control for time service devices in a big dipper short message (short message) manner.
Therefore, it is necessary to develop a multi-path adjustable BDS/GPS time service device and a time service method, which can automatically select an optimal satellite time service information source, perform adaptive adjustment on each path of output signals, facilitate centralized deployment of a large-scale machine room, a C-RAN centralized machine room and a remote machine room, and ensure that equipment can accurately obtain high-precision BDS/GPS time.
Disclosure of Invention
The invention aims to solve the technical problem of providing a multi-channel adjustable BDS/GPS time service device, which can automatically select an optimal satellite time service information source, carry out self-adaptive adjustment on each channel of output signals, facilitate the centralized deployment of a large machine room, a C-RAN centralized machine room and a remote machine room and ensure that equipment can accurately obtain high-precision BDS/GPS time.
In order to solve the technical problems, the invention adopts the technical scheme that: the multi-path adjustable BDS/GPS time service device comprises a main control module, a 1+1 power supply access module, a plurality of radio frequency information sources, a radio frequency switch combining module, a radio frequency adjusting module, a radio frequency connecting module, a radio frequency information source analyzing and monitoring module and an interactive system, wherein the 1+1 power supply access module is electrically connected with the main control module; the plurality of radio frequency information sources are electrically connected with the main control module through the radio frequency switch combining module and are connected in parallel; the input end of the radio frequency adjusting module is connected with the main control module, and the output end of the radio frequency adjusting module is electrically connected with the radio frequency connecting module and used for shunting and switching the radio frequency signal output by the radio frequency adjusting module; the radio frequency information source analysis monitoring module is respectively connected with the main control module and the radio frequency connection module, and the radio frequency connection module and the interactive system are both connected with the main control module.
The invention is further improved in that the radio frequency adjusting module comprises a plurality of radio frequency channels, each radio frequency channel comprises an adjustable radio frequency amplifying and filtering sub-module, an adjustable radio frequency attenuating and filtering sub-module and an adjustable radio frequency on-off control sub-module, the input end of the adjustable radio frequency amplifying and filtering sub-module is connected with the lightning protection module, the output end of the adjustable radio frequency amplifying and filtering sub-module is connected with the input end of the adjustable radio frequency attenuating and filtering sub-module, and the output end of the adjustable radio frequency attenuating and filtering sub-module is connected with the adjustable radio frequency on-off control; each radio frequency channel comprises a first sub-channel and a second sub-channel, wherein the first sub-channel is connected with the radio frequency connection module and is used for providing a channel for accessing and obtaining a time radio frequency signal for external equipment; the second sub-channel is connected with the radio frequency information source analyzing and monitoring module, and the radio frequency adjusting module controls the radio frequency adjusting module through a self-adaptive information source quality algorithm by the main control module according to the real-time monitoring result of the radio frequency information source analyzing and monitoring module to adjust the quality of the radio frequency information source of each radio frequency channel.
The invention has the further improvement that the 1+1 power access module is connected with the main control module through a switch module, and the switch module is used for controlling the power-on or power-off of the multi-path adjustable BDS/GPS time service device.
The interactive system comprises an LCD module, a system indicator light module, a key module, an NTP and serial port module and a dynamic ring alarm module, wherein the LCD module, the system indicator light module, the key module, the NTP and serial port module and the dynamic ring alarm module are respectively connected with the main control module, and the LCD module, the system indicator light module, the key module, the NTP and serial port module and the dynamic ring alarm module are mutually connected in parallel. The device comprises an LCD module, a main control module, a satellite signal source branch circuit, a signal intensity, longitude and latitude and other attribute information and states, wherein the LCD module is connected with the main control module and displays the BDS or GPS signal source branch circuit, the satellite number, the signal intensity, the longitude and latitude and other attribute information and states accessed by the device according to monitoring of the main control module; the system indicator light module is connected with the main control module, the states of the device and the attribute such as normal, alarm and damage are displayed through three-color (green-normal, yellow-alarm and red-damaged) light emitting diodes according to the states of the main control module such as power supply connection condition, radio frequency port connection condition, antenna connection condition and NTP output condition of the device; the key module is connected with the main control module, and pages are turned on an interface displayed by an LCD screen of the device manually, and operations such as selection of an input information source channel are performed; the NTP and serial port module is connected with the main control module, so that NTP time is output through calculation of the main control module for access of other equipment, and an embedded system on the main control module of the device is burned through a serial port, and the device is regulated, measured, set and the like; the dynamic ring alarm module is connected with the main control module and uploads the equipment information, the state and the alarm to the remote management server through a 485 interface and a protocol.
The invention has the further improvement that the plurality of radio frequency information sources comprise a BDS information source, a GPS information source and a time service radio frequency information source, the radio frequency switch combination module is a 3-in-1 radio frequency switch combination module, the BDS information source, the GPS information source and the time service radio frequency information source are electrically connected with the main control module through the 3-in-1 radio frequency switch combination module, and the time service radio frequency information source is connected with the BDS information source and the GPS information source in parallel; the main control module controls and selects an input information source through a self-adaptive information searching algorithm.
The interactive system further comprises a shunt connection indicator light, the shunt connection indicator light is connected with the main control module, and the shunt connection indicator light is connected with the LCD module, the system indicator light module, the key module, the NTP, the serial port module and the moving ring alarm module in parallel.
The invention is further improved in that the lightning protection module is connected between the 3-in-1 radio frequency switch combining module and the radio frequency adjusting module and is used for providing surge protection for the multi-path adjustable BDS/GPS time service device.
The invention is further improved in that the multi-path adjustable BDS/GPS time service device also comprises a shunt connection indicator lamp module, wherein the shunt connection indicator lamp module is respectively connected with the radio frequency adjusting module and the main control module and is used for monitoring the connection state of each path in the radio frequency adjusting module according to the main control module. The branch connection indicator lamp module is connected with the main control module, and status signals of access, non-access, normal, alarm and the like of each path of radio frequency output are displayed through three-color (green closed, yellow open and red alarm) light emitting diodes according to the connection status of each path of the monitoring radio frequency adjusting module of the main control module.
The invention is further improved in that a second adjustable radio frequency attenuation filtering submodule is also connected between the second sub-channel and the radio frequency information source analysis monitoring module.
The functions of each module in the multi-path adjustable BDS/GPS time service device are specifically as follows:
wherein, 1+1 power access module: providing a 1+1 (two paths) power supply access port to be connected with an external power supply, and converting current accessed with AC 85-265V or DC 5-75V into voltage and current required by equipment;
a switch module: between the 1+1 power access module 1 and the main control module, the control equipment is powered on or powered off;
time service radio frequency information source: the satellite radio frequency time service equipment is satellite radio frequency time service equipment except a BDS information source and a GPS information source;
the main control module: on one hand, the signal receiving module is connected with a 3-in-1 radio frequency switch combining module and controls and selects an input signal source through a manual or self-adaptive signal searching algorithm; on the other hand, the radio frequency adjusting module is connected with the BDS/GPS analysis monitoring module and the radio frequency adjusting module, and the radio frequency adjusting module is controlled by a manual or self-adaptive information source quality algorithm according to the real-time monitoring result of the BDS/GPS analysis monitoring module to adjust the quality of each path of BDS/GPS information source; on the last hand, the system is connected with a shunt connection indicator lamp module, an LCD module, a system indicator lamp module, a key module, an NTP and serial port module, a dynamic ring alarm module and the like, and the functions of instruction, computing power, storage and the like are provided for the operation of the modules;
3-in-1 radio frequency switch combiner module: the system is connected with a GPS information source, a BDS information source or a time service radio frequency information source through radio frequency interfaces, and ensures that other information sources disconnect 1 path of information sources and access the information sources to a lightning protection module according to the instruction of the main control module;
a lightning protection module: providing surge protection for the multi-path adjustable BDS/GPS time service device;
the radio frequency adjusting module: the system comprises an adjustable radio frequency amplification filtering submodule, an adjustable radio frequency attenuation filtering submodule and a multi-path radio frequency on-off control submodule; the module is connected with a lightning protection module, adjusts the amplification and attenuation values of each path of output radio frequency signals according to the instruction of the main control module and a safe radio frequency information source provided by the lightning protection module, carries out interference-removing filtering on the signals and ensures that high-quality radio frequency signals are output to the radio frequency connection module;
the BDS/GPS analysis monitoring module is a BDS/GPS analysis monitoring module, is connected with the radio frequency adjusting module, monitors the numerical value and quality of the radio frequency signal output by the radio frequency adjusting module and the connection condition (open circuit, closed circuit or alarm) of each path through a BDS and GPS dual-mode chip of the BDS/GPS analysis monitoring module, and feeds back the monitoring result to the main control module;
the radio frequency connection module: the radio frequency adjusting module is connected with the radio frequency adjusting module, and is used for switching the high-quality radio frequency signal shunt signal output by the radio frequency adjusting module and providing an external interface for external equipment to access to obtain a time radio frequency signal;
the shunt connection indicator lamp module: the system is connected with the main control module, and displays the state signals of access, non-access, normal and alarm and the like of each path of radio frequency output through three-color (green closed, yellow open and red alarm) light-emitting diodes according to the connection state of each path of the monitoring radio frequency adjusting module of the main control module;
an LCD module: the BDS or GPS information source shunt circuit, the satellite number, the signal intensity, the longitude and latitude and other attribute information and states accessed by the device are displayed according to the monitoring of the main control module;
the system indicator light module: the device is connected with the main control module, the states of the device, such as power supply connection, radio frequency port connection, antenna connection, NTP output and the like are monitored according to the main control module, and the states of the device, such as normality, alarm and damage of attributes are displayed through three-color (green-normal, yellow-alarm and red-damaged) light emitting diodes;
a key module: the device is connected with the main control module, and the input information source channel is selected and the like by manually turning pages of an interface displayed by an LCD screen of the device;
NTP and serial port module: the device is connected with the main control module, the NTP time is output through calculation of the main control module for other equipment to access, and an embedded system on the main control module of the device is burned through a serial port, and the device is regulated, tested, set and the like;
the dynamic ring alarm module: and the remote management server is connected with the main control module and uploads the equipment information, the state and the alarm to the remote management server through a 485 interface and a protocol.
The invention aims to solve the technical problem of providing a time service method of a multi-channel adjustable BDS/GPS time service device, which can automatically select an optimal satellite time service information source and carry out self-adaptive adjustment on each output signal, is convenient for large-scale machine rooms, C-RAN centralized machine rooms and remote machine rooms to be centrally deployed and ensures that equipment can accurately obtain high-precision BDS/GPS time.
In order to solve the technical problems, the invention adopts the technical scheme that: the time service method of the multi-path adjustable BDS/GPS time service device specifically comprises the following steps:
s1: powering on and starting the equipment;
s2: the main control module controls and selects an input information source through a self-adaptive information searching algorithm;
s3: the radio frequency adjusting module analyzes the real-time monitoring result of the monitoring module according to the radio frequency information source, the main control module controls the radio frequency adjusting module through a self-adaptive information source quality algorithm, and the quality of the BDS/GPS information source of each radio frequency channel is adjusted.
The invention is further improved in that the specific steps of controlling and selecting the input information source by using the adaptive channel searching algorithm in the step S2 are as follows:
s21: only opening a first input channel, and recording the information source, the satellite number and the intensity of the opened first input channel;
s22: sequentially circulating the step S21 until only the Nth input channel is opened, and recording the information source, the satellite number K and the intensity Q of the opened Nth input channel;
s23: and sequencing the N input channels from strong to weak according to the strength Q, and selecting the input channel with the strongest strength Q as an information source channel.
The further improvement of the present invention is that the specific steps of the main control module controlling the radio frequency adjusting module through the adaptive signal source quality algorithm in step S3 are as follows:
s31: starting detection;
s32: only starting a first output signal, and setting the first output signal according to a self-adaptive information source quality algorithm;
s33: step S32 is circulated in sequence until only the Nth output signal is started, and the Nth output signal is set according to the self-adaptive signal source quality algorithm; i.e. the setup is complete.
In a further improvement of the present invention, if there are at least two input channels with the same strongest strength Q in step S23, the input channel with the largest number K of satellites is selected as the source channel from the input channels with the strongest strength Q.
The invention is further improved in that the calculation formula of the adaptive source quality algorithm is as follows: (F + S) - (Q + L/10) is more than or equal to-130 dBm, wherein L is the length of a lower-order feeder line and the unit is m; q is the input signal strength, in dBm; f is the amplification intensity of the adjustable radio frequency amplification and filtering submodule, and the unit is dBm; and S is the amplification intensity of the adjustable radio frequency attenuation filter submodule, which is a negative value and has the unit of dBm.
Compared with the prior art, the technical scheme has the beneficial effects that: the multi-channel adjustable BDS/GPS time service device and the time service method can automatically select the optimal satellite time service information source, carry out self-adaptive adjustment on each channel of output signals, facilitate the centralized deployment of a large machine room, a C-RAN centralized machine room and a remote machine room, and ensure that equipment can accurately obtain high-precision BDS/GPS time.
Drawings
The following further detailed description of embodiments of the invention is made with reference to the accompanying drawings:
FIG. 1 is a functional schematic diagram of a multi-channel adjustable BDS/GPS time service device of the present invention;
FIG. 2 is a functional schematic diagram of a radio frequency adjusting module of the multi-channel adjustable BDS/GPS time service device of the present invention;
FIG. 3 is a flow chart of an adaptive trust-seeking algorithm for the multi-channel adjustable BDS/GPS time service device of the present invention;
FIG. 4 is a flow chart of an adaptive source quality algorithm for the multi-channel adjustable BDS/GPS time service device of the present invention.
Detailed Description
Example (b): as shown in fig. 1, the multi-path adjustable BDS/GPS time service device includes a main control module 6, a 1+1 power access module 1, 3 radio frequency information sources, a 3-in-1 radio frequency switch combiner module 7, a radio frequency adjustment module 9, a radio frequency connection module 11, a radio frequency information source analysis monitoring module and an interaction system, where the radio frequency information source analysis monitoring module is a BDS/GPS analysis monitoring module 10, and the 1+1 power access module 1 is electrically connected to the main control module 6; the 3 radio frequency information sources are electrically connected with the main control module 6 through the 3-in-1 radio frequency switch combiner module 7, and the 3 radio frequency information sources are connected in parallel; the input end of the radio frequency adjusting module 9 is connected with the main control module 6, and the output end of the radio frequency adjusting module 9 is electrically connected with the radio frequency connecting module 11, and is used for shunting and switching the radio frequency signal output by the radio frequency adjusting module 9; the BDS/GPS analysis monitoring module 10 is respectively connected with the main control module 6 and the radio frequency connection module 11, the radio frequency connection module 11 is connected with the main control module 6, and the interactive system is connected with the main control module 6; the plurality of radio frequency signal sources comprise a BDS signal source 4, a GPS signal source 5 and a time service radio frequency signal source 3, the BDS signal source 4, the GPS signal source 5 and the time service radio frequency signal source 3 are all electrically connected with the main control module 6 through the 3-in-1 radio frequency switch combining module 7, and the time service radio frequency signal source 3 is connected with the BDS signal source 4 and the GPS signal source 5 in parallel; the main control module 6 controls and selects an input information source through a self-adaptive information searching algorithm; as shown in fig. 2, the radio frequency adjusting module 9 includes 8 radio frequency paths, each of the radio frequency paths includes an adjustable radio frequency amplifying and filtering sub-module 18, an adjustable radio frequency attenuating and filtering sub-module 19, and an adjustable radio frequency on-off control sub-module 20, an input end of the adjustable radio frequency amplifying and filtering sub-module 18 is connected to the lightning protection module 8, an output end of the adjustable radio frequency amplifying and filtering sub-module 18 is connected to an input end of the adjustable radio frequency attenuating and filtering sub-module 19, and an output end of the adjustable radio frequency attenuating and filtering sub-module 19 is connected to the adjustable radio frequency on-off; each radio frequency channel comprises a first sub-channel and a second sub-channel, wherein the first sub-channel is connected with the radio frequency connection module 11 and is used for providing a channel for accessing an external device to obtain a time radio frequency signal; the second sub-channel is connected with the BDS/GPS analysis monitoring module 10, the radio frequency adjusting module 9 controls the radio frequency adjusting module 9 through a self-adaptive signal source quality algorithm by the main control module 6 according to the real-time monitoring result of the BDS/GPS analysis monitoring module 10, and the quality of the radio frequency signal source of each radio frequency channel is adjusted; a second adjustable radio frequency attenuation filtering submodule 21 is also connected between the second sub-channel and the BDS/GPS analysis monitoring module 10; the 1+1 power access module 1 is connected with the main control module 6 through a switch module 2, and the switch module 2 is used for controlling the power-on or power-off of the multi-path adjustable BDS/GPS time service device; the interactive system comprises an LCD module 13, a system indicator light module 14, a key module 15, an NTP and serial port module 16 and a dynamic ring alarm module 17, wherein the LCD module 13, the system indicator light module 14, the key module 15, the NTP and serial port module 16 and the dynamic ring alarm module 17 are respectively connected with the main control module 6, and the LCD module 13, the system indicator light module 14, the key module 15, the NTP and serial port module 16 and the dynamic ring alarm module 17 are connected in parallel; the LCD module 13 is connected with the main control module 6, and displays attribute information and states of a branch circuit, satellite number, signal strength, longitude and latitude and the like of the BDS information source 4 or the GPS information source 5 accessed by the device according to monitoring of the main control module 6; system indicator light module 14: the wireless monitoring device is connected with the main control module 6, the states of the device, such as power supply connection condition, radio frequency port connection condition, antenna connection condition, NTP output condition and the like are monitored according to the main control module 6, and the states of the device, such as normality, warning and damage of attributes are displayed through three-color (green-normal, yellow-warning and red-damaged) light-emitting diodes; the key module 15: the device is connected with the main control module 6, and the input information source channel is selected and the like by manually turning pages of an interface displayed by an LCD screen of the device; NTP and serial module 16: the device is connected with the main control module 6, on one hand, NTP time is output through calculation of the main control module 6 to be accessed by other equipment, on the other hand, an embedded system on the main control module of the device is burned through a serial port, and the device is regulated, tested, set and the like; moving ring alarm module 17: the remote management server is connected with the main control module 6 and uploads the equipment information, the state and the alarm to the remote management server through a 485 interface and a protocol; the lightning protection module 8 is connected between the 3-in-1 radio frequency switch combiner module 7 and the radio frequency adjusting module 9.
The functions of each module in the multi-path adjustable BDS/GPS time service device are specifically as follows:
wherein, 1+1 power access module 1: providing a 1+1 (two paths) power supply access port to be connected with an external power supply, and converting current accessed with AC 85-265V or DC 5-75V into voltage and current required by equipment;
the switch module 2: between the 1+1 power access module 1 and the main control module 6, the control equipment is powered on or powered off;
time service radio frequency signal source 3: the satellite radio frequency time service equipment is other satellite radio frequency time service equipment except the BDS information source 4 and the GPS information source 5;
the main control module 6: on one hand, the radio frequency switch combiner module 7 is connected with a 3-in-1 radio frequency switch, and an input information source is controlled and selected through a manual or self-adaptive information searching algorithm; on the other hand, the radio frequency adjusting module 9 is connected with the BDS/GPS analysis monitoring module 10 and the radio frequency adjusting module 9, and the radio frequency adjusting module 9 is controlled by a manual or self-adaptive information source quality algorithm according to the real-time monitoring result of the BDS/GPS analysis monitoring module 10 to adjust the quality of each path of BDS/GPS information source; on the last hand, the system is connected with a shunt connection indicator light module 12, an LCD module 13, a system indicator light module 14, a key module 15, an NTP and serial port module 16, a dynamic ring alarm module 17 and the like, and provides the capabilities of instruction, computing power, storage and the like for the operation of the modules;
3-in-1 radio frequency switch combiner module 7: the GPS signal source 4, the BDS signal source 5 or the time service radio frequency signal source 3 are connected through radio frequency interfaces, and according to the instruction of the main control module 6, other signal sources are ensured to be disconnected 1 signal source and connected to the lightning protection module 8;
and a lightning protection module 8: providing surge protection for the multi-path adjustable BDS/GPS time service device;
the radio frequency adjusting module 9: the device comprises an adjustable radio frequency amplification filtering submodule 18, an adjustable radio frequency attenuation filtering submodule 19 and a multi-channel radio frequency on-off control submodule 20; the radio frequency adjusting module 9 is connected with the lightning protection module 8, adjusts the amplification and attenuation values of each path of output radio frequency signals according to the instruction of the main control module 6 and the safe radio frequency information source provided by the lightning protection module 8, performs interference-free filtering on the signals, and ensures that high-quality radio frequency signals are output to the radio frequency connecting module 11;
the radio frequency information source analysis monitoring module is a BDS/GPS analysis monitoring module 10, is connected with the radio frequency adjusting module 9, monitors the numerical value and quality of the radio frequency signal output by the radio frequency adjusting module and the connection condition (open circuit, closed circuit or alarm) of each path through a BDS and GPS dual-mode chip of the radio frequency adjusting module, and feeds back the monitoring result to the main control module;
the radio frequency connection module 11: the radio frequency adjusting module 9 is connected to transfer the high-quality radio frequency signal shunt signal output by the radio frequency adjusting module 9 and provide an external interface for an external device to access to obtain a time radio frequency signal;
shunt connection indicator lamp module 12: respectively connected with the radio frequency adjusting module 9 and the main control module 6; the wireless monitoring system is connected with the main control module 6, and displays state signals of access, non-access, normal, alarm and the like of each path of radio frequency output through three-color (green closed, yellow open and red alarm) light-emitting diodes according to the connection state of each path of the monitoring radio frequency adjusting module 9 of the main control module 6;
the LCD module 13: the BDS signal source monitoring and displaying device is connected with the main control module 6, and attribute information and states of a branch circuit, satellite particles, signal strength, longitude and latitude and the like of the BDS signal source 4 or the GPS signal source 5 accessed by the device are displayed according to monitoring of the main control module 6;
system indicator light module 14: the device is connected with the main control module 6, the states of the device, such as the power supply connection condition, the radio frequency port connection condition, the antenna connection condition, the NTP output condition and the like, of the device are monitored according to the main control module 6, and the states of the device, such as the normality, the alarm, the damage and the like of the attribute are displayed through three-color (green-normal, yellow-alarm and red-damaged) light-emitting diodes;
the key module 15: the device is connected with the main control module 6, and the input information source channel is selected and the like by manually turning pages of an interface displayed by an LCD screen of the device;
NTP and serial module 16: the device is connected with the main control module 6, on one hand, NTP time is output through calculation of the main control module 6 to be accessed by other equipment, on the other hand, an embedded system on the main control module of the device is burned through a serial port, and the device is regulated, tested, set and the like;
moving ring alarm module 17: and the remote management server is connected with the main control module 6 and uploads the equipment information, the state and the alarm to the remote management server through a 485 interface and a protocol.
The time service method of the multi-path adjustable BDS/GPS time service device specifically comprises the following steps:
s1: powering on and starting the equipment;
s2: the main control module 6 controls and selects an input information source through a self-adaptive information searching algorithm;
as shown in fig. 3, the specific steps of controlling and selecting the input signal source by using the adaptive channel searching algorithm in step S2 are as follows:
s21: only opening a first input channel, closing other input channels, and recording the information source, the satellite number and the strength of the opened first input channel;
s22: only opening a second input channel, closing other input channels, and recording the information source, the satellite number and the strength of the opened second input channel; sequentially circulating until only the Nth input channel is opened, closing other input channels, and recording the information source, the satellite number K and the strength Q of the opened Nth input channel;
s23: sorting the N input channels from strong to weak according to the strength Q, and selecting the input channel with the strongest strength Q as an information source channel;
if there are multiple input channels with the same strongest strength Q in step S23, selecting the input channel with the largest number K of satellites from the input channels with the strongest strength Q as a source channel; s3: the radio frequency adjusting module controls the radio frequency adjusting module through a self-adaptive information source quality algorithm by the main control module according to the real-time monitoring result of the BDS/GPS analysis monitoring module, and adjusts the quality of the BDS/GPS information source of each radio frequency channel;
s3: the radio frequency adjusting module analyzes the real-time monitoring result of the monitoring module according to the radio frequency information source, the main control module controls the radio frequency adjusting module through a self-adaptive information source quality algorithm, and the quality of the BDS/GPS information source of each radio frequency channel is adjusted;
as shown in fig. 4, the specific steps of the main control module controlling the rf adjusting module through the adaptive signal source quality algorithm are as follows:
s31: starting detection;
s32: only the first output signal is turned on, other output signals are turned off, and the first output signal is set according to a self-adaptive information source quality algorithm; the calculation formula of the self-adaptive information source quality algorithm is as follows: (F + S) - (Q + L/10) is more than or equal to-130 dBm, wherein L is the length of a lower-order feeder line and the unit is m; q is the input signal strength, in dBm; f is the amplification intensity of the adjustable radio frequency amplification and filtering submodule, and the unit is dBm; s is the amplification intensity of the adjustable radio frequency attenuation filter submodule, which is a negative value and has the unit of dBm;
s33: only starting the second output signal, closing other output signals, and setting the second output signal according to a self-adaptive signal source quality algorithm; sequentially circulating until only the Nth output signal is started, closing other output signals, and setting the Nth output signal according to a self-adaptive signal source quality algorithm; i.e. the setup is complete.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (11)
1. A multi-path adjustable BDS/GPS time service device is characterized by comprising a main control module, a 1+1 power supply access module, a plurality of radio frequency information sources, a radio frequency switch combining module, a radio frequency adjusting module, a radio frequency connecting module, a radio frequency information source analyzing and monitoring module and an interaction system, wherein the 1+1 power supply access module is electrically connected with the main control module; the plurality of radio frequency information sources are electrically connected with the main control module through the radio frequency switch combining module and are connected in parallel; the input end of the radio frequency adjusting module is connected with the main control module, and the output end of the radio frequency adjusting module is electrically connected with the radio frequency connecting module and used for shunting and switching the radio frequency signal output by the radio frequency adjusting module; the radio frequency information source analysis monitoring module is respectively connected with the main control module and the radio frequency connection module, and the radio frequency connection module and the interactive system are both connected with the main control module;
the lightning protection device comprises a radio frequency adjusting module, a lightning protection module, an adjustable radio frequency amplifying and filtering submodule, an adjustable radio frequency attenuation and filtering submodule and an adjustable radio frequency on-off control submodule, wherein the radio frequency adjusting module comprises a plurality of radio frequency channels, each radio frequency channel comprises an adjustable radio frequency amplifying and filtering submodule, an adjustable radio frequency attenuation and filtering submodule and an adjustable radio frequency on-off control submodule; each radio frequency channel comprises a first sub-channel and a second sub-channel, wherein the first sub-channel is connected with the radio frequency connection module and is used for providing a channel for accessing and obtaining a time radio frequency signal for external equipment; the second sub-channel is connected with the radio frequency information source analyzing and monitoring module, and the radio frequency adjusting module controls the radio frequency adjusting module through a self-adaptive information source quality algorithm by the main control module according to the real-time monitoring result of the radio frequency information source analyzing and monitoring module to adjust the quality of the radio frequency information source of each radio frequency channel;
the plurality of radio frequency information sources comprise BDS information sources, GPS information sources and time service radio frequency information sources, the radio frequency switch combination module is a 3-in-1 radio frequency switch combination module, the BDS information sources, the GPS information sources and the time service radio frequency information sources are all electrically connected with the main control module through the 3-in-1 radio frequency switch combination module, and the time service radio frequency information sources are connected with the BDS information sources and the GPS information sources in parallel; the main control module controls and selects an input information source through a self-adaptive information searching algorithm;
the calculation formula of the self-adaptive information source quality algorithm is as follows: (F + S) - (Q + L/10) is more than or equal to-130 dBm, wherein L is the length of a lower-order feeder line and the unit is m; q is the input signal strength, in dBm; f is the amplification intensity of the adjustable radio frequency amplification and filtering submodule, and the unit is dBm; s is the amplification intensity of the adjustable radio frequency attenuation filter submodule, which is a negative value and has the unit of dBm;
the main control module adopts a self-adaptive message searching algorithm to control and select an input message source, and the specific steps are as follows:
step 1: only opening a first input channel, and recording the information source, the satellite number and the intensity of the opened first input channel;
step 2: sequentially circulating the step 2 until only the Nth input channel is opened, and recording the information source, the satellite number K and the strength Q of the opened Nth input channel;
and step 3: and sequencing the N input channels from strong to weak according to the strength Q, and selecting the input channel with the strongest strength Q as an information source channel.
2. The multi-channel adjustable BDS/GPS time service device as claimed in claim 1, wherein the 1+1 power access module is connected to the main control module through a switch module, and the switch module is used for controlling the power-on or power-off of the multi-channel adjustable BDS/GPS time service device.
3. The multi-channel adjustable BDS/GPS time service device as claimed in claim 1, wherein the interactive system comprises an LCD module, a system indicator light module, a key module, an NTP and serial port module and a dynamic ring alarm module, the LCD module, the system indicator light module, the key module, the NTP and serial port module and the dynamic ring alarm module are respectively connected with the main control module, and the LCD module, the system indicator light module, the key module, the NTP and serial port module and the dynamic ring alarm module are connected in parallel.
4. The multi-channel adjustable BDS/GPS time service device as claimed in claim 3, wherein the interactive system further comprises a shunt connection indicator light, the shunt connection indicator light is connected with the main control module, and the shunt connection indicator light is connected with the LCD module, the system indicator light module, the key module, the NTP and serial port module and the dynamic ring alarm module in parallel.
5. The multi-channel adjustable BDS/GPS time service device as claimed in claim 3, wherein the lightning protection module is connected between the 3-in-1 radio frequency switch combining module and the radio frequency adjusting module, and is used for providing surge protection for the multi-channel adjustable BDS/GPS time service device.
6. The multi-path adjustable BDS/GPS time service device of claim 3, further comprising a shunt connection indicator light module, wherein the shunt connection indicator light module is respectively connected with the radio frequency adjusting module and the main control module, and is configured to monitor a connection status of each path of the radio frequency adjusting module according to the main control module.
7. The multi-channel adjustable BDS/GPS time service device as claimed in claim 4, wherein a second adjustable RF attenuation filter sub-module is further connected between the second sub-channel and the RF source analysis monitoring module.
8. A time service method using the multi-channel adjustable BDS/GPS time service device of any claim 1 to 7, which comprises the following steps:
s1: powering on and starting the equipment;
s2: the main control module controls and selects an input information source through a self-adaptive information searching algorithm;
s3: the radio frequency adjusting module analyzes the real-time monitoring result of the monitoring module according to the radio frequency information source, the main control module controls the radio frequency adjusting module through a self-adaptive information source quality algorithm, and the quality of the BDS/GPS information source of each radio frequency channel is adjusted;
the specific steps of controlling and selecting the input information source by adopting the adaptive channel searching algorithm in the step S2 are as follows:
s21: only opening a first input channel, and recording the information source, the satellite number and the intensity of the opened first input channel;
s22: sequentially circulating the step S21 until only the Nth input channel is opened, and recording the information source, the satellite number K and the intensity Q of the opened Nth input channel;
s23: and sequencing the N input channels from strong to weak according to the strength Q, and selecting the input channel with the strongest strength Q as an information source channel.
9. The time service method of the multi-channel adjustable BDS/GPS time service device according to claim 8, wherein the step S3, in which the specific step in which the main control module controls the radio frequency adjusting module through a self-adaptive signal source quality algorithm, is:
s31: starting detection;
s32: only starting a first output signal, and setting the first output signal according to a self-adaptive information source quality algorithm;
s33: step S32 is circulated in sequence until only the Nth output signal is started, and the Nth output signal is set according to the self-adaptive signal source quality algorithm; i.e. the setup is complete.
10. The method as claimed in claim 9, wherein if there are at least two input paths with the same strength Q in step S23, the input path with the highest number K of satellites is selected as the source channel from among the input paths with the highest strength Q.
11. The timing method of the multi-channel adjustable BDS/GPS timing device as claimed in claim 10, wherein the calculation formula of the adaptive signal source quality algorithm is as follows: (F + S) - (Q + L/10) is more than or equal to-130 dBm, wherein L is the length of a lower-order feeder line and the unit is m; q is the input signal strength, in dBm; f is the amplification intensity of the adjustable radio frequency amplification and filtering submodule, and the unit is dBm; and S is the amplification intensity of the adjustable radio frequency attenuation filter submodule, which is a negative value and has the unit of dBm.
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| JP2005020216A (en) * | 2003-06-25 | 2005-01-20 | Hitachi Ltd | Method and device for measuring radio position |
| CN102062862B (en) * | 2010-12-14 | 2012-11-14 | 东莞市泰斗微电子科技有限公司 | Method for selecting hybrid positioning or timing mode of navigational satellite |
| CN102156289B (en) * | 2011-03-09 | 2013-05-15 | 陕西诺维信息技术有限公司 | Dual-mode positioning time-service type receiver for compass satellite and global positioning system (GPS) satellite |
| CN102323744A (en) * | 2011-08-12 | 2012-01-18 | 北京电子工程总体研究所 | High-precision and independent time-keeping type ground time service instrument used on ground in complex environment |
| CN203037855U (en) * | 2012-12-24 | 2013-07-03 | 天津七六四通信导航技术有限公司 | ADS-B timing unit of three systems of GPS/Beidou/GLONASS |
| CN103476026B (en) * | 2013-09-06 | 2017-01-18 | 中国科学院软件研究所 | Self-adaption covert communication method based on satellite channel coding |
| CN107122811A (en) * | 2017-04-11 | 2017-09-01 | 公安部第三研究所 | The intelligent RFID reader and method positioned in real time for active radio frequency label |
| CN109991838B (en) * | 2019-03-29 | 2021-05-04 | 南京华苏科技有限公司 | Beidou short message based master control time service device, system and method |
| CN110069011B (en) * | 2019-04-26 | 2021-03-05 | 南京华苏科技有限公司 | BD and GPS-based optical fiber remote centralized time service system and time service method |
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Effective date of registration: 20230517 Address after: 210000 No.10, building 39, Suning Yaju, no.258, Baota Road, Chunxi street, Gaochun District, Nanjing City, Jiangsu Province Patentee after: NANJING HOWSO TECHNOLOGY Co.,Ltd. Patentee after: Huasu Shulian Technology Co.,Ltd. Address before: No.10, building 39, Suning Yaju, no.258, Baota Road, Chunxi street, Gaochun District, Nanjing City, Jiangsu Province, 211300 Patentee before: NANJING HOWSO TECHNOLOGY Co.,Ltd. |