CN111600550A

CN111600550A - S-band frequency conversion device and switching control method for main and standby machine boxes

Info

Publication number: CN111600550A
Application number: CN202010364603.5A
Authority: CN
Inventors: 王彦霞; 代维宽; 李文明; 韩国胜; 燕官锋; 路进强
Original assignee: HEBEI JINGHE ELECTRONIC TECHNOLOGY CO LTD
Current assignee: HEBEI JINGHE ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-08-28
Anticipated expiration: 2040-04-30
Also published as: CN111600550B

Abstract

The invention discloses an S-band frequency conversion device and a switching control method of a main chassis and a standby chassis, and relates to the technical field of frequency conversion. An S-band frequency conversion device comprises a main case and a standby case, wherein the main case uploads a working state to the standby case in real time, when the main case fails in self-detection, the main case is stopped and switched to a standby case, and the standby case automatically restores the working state according to state data uploaded by the main case before the failure. A switching control method for main and standby machine boxes is characterized in that the gain state of a channel for monitoring up and down conversion is compared with the set state, whether the locking indication of a phase-locked loop is normal is detected, whether the current of each component in a frequency converter is normal is monitored, and if the current is abnormal, the main machine box is switched to the standby machine box. The invention improves the system stability, reduces the damage caused by faults, solves the problem of fault shutdown maintenance of the S-band frequency conversion device, provides sufficient time for maintenance and repair, and reduces the total cost of maintenance.

Description

S-band frequency conversion device and switching control method for main and standby machine boxes

Technical Field

The invention relates to the technical field of frequency conversion, in particular to an S-band frequency conversion device which is suitable for satellite communication and belongs to satellite communication navigation ground station receiving and transmitting equipment.

Background

The normal S-band frequency converter is in a module form and can only be installed in some platforms as an assembly. Once a fault occurs, it must be shut down for repair and maintenance. For some platforms, such as communication base stations, once the fault is stopped for even a few seconds, immeasurable loss can be caused, and the communication base stations are particularly applied to the field of national defense, so that the communication base stations cannot be applied to platforms which need to work without stopping for a long time.

The common S-band frequency converter consists of up-conversion and down-conversion. The intermediate frequency signal enters an intermediate frequency amplifier to be amplified after entering the up-conversion, is filtered by an intermediate frequency filter, is mixed to a radio frequency signal by a local oscillation signal generated by a local oscillation and a mixer, is filtered by the radio frequency filter, is subjected to gain adjustment by a numerical control attenuator, and is amplified and output to the intermediate frequency amplifier. After the radio frequency signal enters the down-conversion, the radio frequency signal firstly enters the frequency amplifier to amplify the signal, then is filtered by the radio frequency filter, then is mixed to the intermediate frequency signal by the local oscillation signal generated by the local oscillation and the frequency mixer, then is filtered by the intermediate frequency filter, is subjected to gain adjustment by the numerical control attenuator, and then is amplified and output by the intermediate frequency amplifier.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an S-band frequency conversion device and a main and standby machine box switching control method, thereby improving the system stability, reducing the damage caused by faults, solving the problem of fault shutdown maintenance of the S-band frequency conversion device, improving the operation efficiency, providing sufficient time for maintenance and repair and reducing the total maintenance cost.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the invention provides an S-band frequency conversion device, which comprises a main case and a standby case, wherein the main case and the standby case are both provided with independent power supply devices, the main case uploads a working state to the standby case in real time, when the main case fails in self-detection, the main case is stopped and switched to a standby case, and the standby case automatically recovers the working state according to state data uploaded by the main case before the failure.

The technical scheme of the invention is further improved as follows: the main case and the standby case respectively comprise an up-conversion module, a down-conversion module, a power module, a control module, a front panel and a rear panel; the up-conversion module converts the intermediate frequency signal 70MHz +/-12 MHz into an S-band signal, synchronizes an external standard frequency clock signal and provides a reference clock signal for the down-conversion module; the down-conversion module converts the S-band signal into an intermediate frequency signal of 70MHz +/-12 MHz; the power supply module converts 220V alternating current into +12V direct current and +5V direct current; the control module controls and detects the up-conversion module and the down-conversion module, communicates with the outside through a rear panel network port, realizes the communication of the main and standby case boxes through a DB9 hole, and controls a front panel screen to display the current setting state and information.

The technical scheme of the invention is further improved as follows: the up-conversion module comprises an up-conversion channel, an F0_ up-filter, an F1_ up-filter, an intermediate frequency input interface, an intermediate frequency input monitoring interface, a radio frequency output monitoring interface, an external frequency standard input interface, a reference clock output interface, a power supply interface and a control interface, wherein the up-conversion channel comprises a clock circuit, a local oscillator circuit, an intermediate frequency channel circuit, a mixing circuit and a radio frequency channel circuit.

The technical scheme of the invention is further improved as follows: the down-conversion module comprises a down-conversion channel, an F0_ down filter, an F1_ down filter, a control module, a source module, an intermediate frequency output interface, an intermediate frequency output monitoring interface, a radio frequency input monitoring interface, a reference clock input interface, a power interface and a control interface, and the up-conversion channel comprises a local oscillation circuit, a radio frequency channel circuit, a mixing circuit and an intermediate frequency channel circuit.

The technical scheme of the invention is further improved as follows: the control module circuit comprises a 130 circuit for controlling the whole chassis to operate, an STM32 circuit for communicating with a remote computer through a network port and an M25P16 circuit.

The technical scheme of the invention is further improved as follows: the front panel comprises a power switch, an indicator light area, a display area, a key area and upper and lower channel monitoring signal outputs, the upper and lower channel monitoring signal outputs comprise a channel monitoring port and a receiving channel monitoring, the transmitting channel monitoring port comprises an intermediate frequency output monitoring and a radio frequency output monitoring, and the amplitude difference between a monitoring signal and a main channel signal is-30 +/-1 dB; the receiving channel monitoring comprises intermediate frequency output monitoring and radio frequency output monitoring, and the amplitude difference between a monitoring signal and a main channel signal is minus 20 +/-1 dB.

The technical scheme of the invention is further improved as follows: the rear panel comprises a power socket, a grounding column, a network port socket, a main and standby case connecting port, a down-conversion port, an up-conversion port and an external reference input interface.

The invention also provides a main and standby machine box switching control method of the S-band frequency conversion device, and the switching judgment follows the following principle: 1. comparing the channel gain state of the up-conversion and down-conversion with the set state by monitoring, and switching from the main case to the standby case if the channel gain state exceeds the range of the set state; 2. detecting whether the locking indication of the phase-locked loop is normal or not, and if the locking indication of the phase-locked loop is abnormal, switching from the main case to the standby case; 3. and monitoring whether the current of each component in the frequency converter is normal or not, and switching from the main case to the standby case if the current of each component in the frequency converter is abnormal.

The technical scheme of the invention is further improved as follows: when no input of an external frequency standard is monitored, the input power of the intermediate frequency signal of the up-conversion channel exceeds the range, and the input power of the radio frequency signal of the down-conversion channel exceeds the range, the main case is not switched to the standby case, the main case works normally, and alarm information is given.

The technical scheme of the invention is further improved as follows: the method comprises the following steps:

(1) the detection up-conversion module and the down-conversion module detect the power of input and output signals and provide analog voltage data to the control module to identify the power of the input and output signals; when the input signal exceeds the upper and lower limits of the input signal power specified by the S-band frequency conversion device, judging to alarm, lighting a front panel alarm indicator lamp and displaying specific alarm information on a screen; if the control module exceeds the range of the monitored channel gain state and the set state, the main case is switched to the standby case, the front panel fault indicator lamp is switched on, the screen is turned on, the fault reason is uploaded to the remotely controlled computer and is locally stored, and the standby case is started to become the main case;

(2) the up-down conversion module and the down-conversion module provide the locking indication of the local oscillator to the control module for judgment; when the local oscillator is identified not to be locked, the main case is switched to a standby case, the front panel fault indicator lamp is turned on, the screen is turned on, the fault reason is uploaded to a remote control computer and is locally stored, and the standby case is started to become the main case;

(3) the control module is also provided with a current detector for detecting the working current of the up-conversion module and the down-conversion module to judge the working state of the up-conversion module and the down-conversion module, if the current exceeds a set threshold value, the main case is switched to a spare case front panel fault indicator lamp to light a screen, the fault reason is uploaded to a remote control computer and is locally stored, and the spare case is started to become the main case.

Due to the adoption of the technical scheme, the invention has the technical progress that:

the S-band frequency conversion device is changed into a case form on the basis of the original module, the upper frequency conversion module, the lower frequency conversion module, the power supply module and the control module are integrated in one case, and the two cases are respectively used as main and standby cases, so that a set of complete novel S-band frequency converter is formed, the system stability is improved, and the damage caused by faults is reduced. When the main case of the invention breaks down, the main case can be quickly switched to the standby case to work within 100ms, and the switching time is short, which basically does not affect the operation of the whole platform, thereby solving the problem of maintenance without stopping when the S-band frequency conversion device breaks down, improving the operation efficiency, providing sufficient time for maintenance and repair, and reducing the total cost of maintenance.

The equipment of the invention adopts a 1:1 backup mode, a backup controller is not needed, a fault self-detection function is added on the basis of a common S-band frequency converter, and when a main frequency converter fails, the main frequency converter is automatically switched to a standby frequency converter. The standby case can be used as a 1:1 backup and a single machine, and the operation efficiency is doubled on the premise of ensuring the cost. And when the 1:1 redundancy hot backup works, when one machine box is in a maintenance state, the other machine box does not influence the work of the other machine box, and the maintenance equipment can be quickly replaced conveniently in the state that the whole system does not stop.

The invention adds the monitoring interfaces of up-conversion and down-conversion input and output on the basis of internally monitoring and detecting input and output signals to judge faults, can observe signals of an input S-band frequency conversion device and an output S-band frequency conversion device through a measuring instrument, can correct and visually judge whether the faults are consistent with the faults reported by equipment or not, improves the fault discharge efficiency, reduces the hazard of the faults and effectively improves the fault prevention capability.

The control module realizes the functions of controlling and detecting the up-conversion module and the down-conversion module, communicating with the outside through a rear panel network port, realizing the communication of the main and standby chassis boxes through a DB9 hole, controlling the S-band frequency conversion device to use through a front panel key, and controlling a front panel screen to display the current setting state and information. And controlling the front panel indicator lamp to display the module state.

Drawings

FIG. 1 is a block diagram of an up-conversion module channel implementation of the present invention;

FIG. 2 is a block diagram of a down conversion module channel implementation of the present invention;

FIG. 3 is a block diagram of an up-conversion module clock implementation of the present invention;

FIG. 4 is a block diagram of a control module local control display and remote control implementation;

FIG. 5 is a front panel layout of a single chassis;

FIG. 6 is a rear panel layout of a single chassis;

FIG. 7 is a layout diagram of the interior of a single chassis;

FIG. 8 is a control module schematic diagram;

FIG. 9 is a circuit schematic of the control module 130;

FIG. 10 is a first sub-diagram of a schematic circuit diagram of the control module 130;

FIG. 11 is a second sub-diagram of the circuit schematic of control module 130;

FIG. 12 is a third sub-diagram of the circuit schematic of the control module 130;

FIG. 13 is a fourth sub-diagram of the circuit schematic of the control module 130;

FIG. 14 is a fifth sub-diagram of the circuit schematic of the control module 130;

FIG. 15 is a sixth sub-diagram of the circuit schematic of the control module 130;

FIG. 16 is a seventh sub-diagram of the circuit schematic of the control module 130;

FIG. 17 is an eighth sub-diagram of the circuit schematic of the control module 130;

FIG. 18 is a ninth sub-diagram of the circuit schematic of the control module 130;

FIG. 19 is a tenth sub-diagram of the circuit schematic of the control module 130;

FIG. 20 is a circuit schematic of the control module M25P 16;

FIG. 21 is a schematic circuit diagram of the control module STM 32;

FIG. 22 is a first sub-diagram of the control module STM32 circuit schematic;

FIG. 23 is a second sub-diagram of the control module STM32 circuit schematic;

FIG. 24 is a third sub-diagram of the control module STM32 circuit schematic;

FIG. 25 is a fourth sub-diagram of the control module STM32 circuit schematic;

FIG. 26 is a fifth sub-diagram of the control module STM32 circuit schematic;

FIG. 27 is a sixth sub-diagram of the control module STM32 circuit schematic;

FIG. 28 is a seventh sub-diagram of the control module STM32 circuit schematic;

FIG. 29 is an eighth sub-diagram of the control module STM32 circuit schematic;

FIG. 30 is a cable connection diagram inside the enclosure;

FIG. 31 is a top view of FIG. 30;

FIG. 32 is a bottom view of FIG. 30;

the system comprises a frequency conversion channel 1, an up-conversion channel 2, a down-conversion channel 3, an F0_ up filter, a 4, an F0_ down filter, a 5, an F1_ up filter, a 6, an F1_ down filter, a 7, a control module 8 and a power supply module.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

as shown in fig. 1 to 32, an S-band frequency conversion device and a method for controlling switching between a main chassis and a standby chassis.

The S-band frequency conversion device comprises a main case and a standby case, wherein the main case and the standby case are respectively provided with an independent 220V three-phase alternating current power line for independent power supply, and are also respectively provided with an independent network communication interface for remote control of a computer, and the main case and the standby case are connected and communicated through a DB9 cable. The main case uploads the working state to the standby case in real time, when the main case fails in self-detection, the main case is switched to the standby case, the standby case is switched to the main case, and the working state is automatically set and recovered according to the uploading state data of the main case before the failure. When there is no standby case, the main case can also be in stand-alone state to work alone.

The interior of the case is mainly divided into six parts, including an up-conversion module, a down-conversion module, a power module 8, a control module 7, a front panel and a rear panel. Four kinds of modules of up-conversion module, down-conversion module, power module 8, control module 7 pass through screw fixed connection with quick-witted case welt, up-conversion module, down-conversion module, control module 7 are the core of this equipment, and the inside core of up-conversion module, down-conversion module, control module 7 is the circuit board, and the circuit board forms according to the circuit schematic diagram preparation, including 1 circuit of up-conversion passageway, 2 circuit of down-conversion passageway, control circuit. The system also comprises an up-conversion channel 1, an F0_ up filter 3 and an F1_ up filter 5 which are fixedly connected to the up-conversion module, and a down-conversion channel 2, an F0_ down filter 4 and an F1_ down filter 6 which are fixedly connected to the down-conversion module.

1. Up-conversion module

The up-conversion module realizes the following functions: the intermediate frequency signal is changed into an S-band signal at 70MHz +/-12 MHz; synchronizing an external standard frequency clock signal; a reference clock signal is provided for the down conversion module.

The up-conversion module comprises an intermediate frequency input interface (SMA-K), an intermediate frequency input monitoring interface (SMA-K), a radio frequency output monitoring interface (SMA-K), an external frequency standard input interface (SMA-K), a reference clock output interface (SMA-K), a power interface (2001-02P) and a control interface (1132-12P).

Each connector is connected and functions:

(1) the intermediate frequency input interface is connected with an intermediate frequency input interface (N/SMA) on the rear panel, and intermediate frequency signals are input into the up-conversion module through the rear panel.

(2) The intermediate frequency input monitoring interface is connected with the front panel intermediate frequency input monitoring interface (SMA-K), and the intermediate frequency signal input into the up-conversion can be monitored through the intermediate frequency input monitoring interface of the front panel.

(3) The radio frequency output interface is connected with a radio frequency output interface (N/SMA) on the rear panel, and radio frequency signals output by up-conversion are output through the rear panel.

(4) The radio frequency output monitoring interface is connected with a front panel radio frequency output monitoring interface (SMA-K), and radio frequency signals output externally by up-conversion can be monitored through the radio frequency output monitoring interface of the front panel.

(5) The external standard frequency input interface is connected with an external standard frequency input interface (N/SMA) on the rear panel, and an external standard frequency clock signal is input into the up-conversion module through the rear panel.

(6) The reference clock output interface is connected with the reference clock input interface of the down-conversion module, and the reference clock signal is input into the down-conversion module from the up-conversion module.

(7) The power interface is connected with the power module 8 and the DC +12V interface, and the power module 8 supplies power to the up-conversion module through the interface.

(8) The control interface is connected with an up-conversion control interface of the control module 7, and the up-conversion module is controlled by the interface control module 7.

2. Down conversion module

The down-conversion module realizes the following functions: the S-band signal is converted into an intermediate frequency signal of 70MHz +/-12 MHz.

The down-conversion module comprises an intermediate frequency output interface (SMA-K), an intermediate frequency output monitoring interface (SMA-K), a radio frequency input monitoring interface (SMA-K), a reference clock input interface (SMA-K), a power interface (2001-02P) and a control interface (1132-12P).

Each connector is connected and functions:

(1) the intermediate frequency output interface is connected with an intermediate frequency output interface (N/SMA) on the rear panel, and the intermediate frequency signal output by the down-conversion module is output through the rear panel.

(2) The intermediate frequency output monitoring interface is connected with an intermediate frequency output monitoring interface (SMA-K) of the front panel, and the intermediate frequency signal output by the down-conversion module can be monitored through the intermediate frequency output monitoring interface of the front panel.

(3) The radio frequency input interface is connected with a radio frequency input interface (N/SMA) on the rear panel, and radio frequency signals are input into the down-conversion module through the rear panel.

(4) The radio frequency input monitoring interface is connected with a front panel radio frequency input monitoring interface (SMA-K), and the radio frequency signal input to the down-conversion module can be monitored through the radio frequency input monitoring interface of the front panel.

(5) The reference clock input interface is connected with the up-conversion reference clock output interface, and the reference clock signal is input into the down-conversion module from the up-conversion module.

(6) The power interface is connected with the power module 8 and the DC +12V interface, and the power module 8 supplies power to the down-conversion module through the interface.

(7) The control interface is connected with a down-conversion control interface of the control module 7, and the down-conversion module is controlled by the interface control module 7.

3. Power supply module 8

The functions implemented by the power supply module 8: the 220V alternating current is converted into +12V direct current and +5V direct current.

The power supply module 8 comprises an AC220V interface, a DC +12V interface, a DC +5V interface and a grounding interface.

Each connector is connected and functions:

(1) the AC220V interface is connected through an EMI filter to a three-phase receptacle on the back panel through which 220V AC power is supplied to the power module 8.

(2) The DC +12V interface is respectively connected with the power interface of the up-conversion module and the power interface of the down-conversion module, and the power module 8 respectively provides +12V direct current for the up-conversion module and the down-conversion module through the interfaces.

(3) The DC +5V interface is connected with a power interface of the control module 7, and the power module 8 provides +5V direct current for the control module 7 through the interface.

(4) The grounding interface is connected with the grounding post of the rear panel, and the power module 8 is connected with the ground outside the case through the grounding post of the rear panel.

4. Control module 7

The control module 7 controls and detects the up-conversion and down-conversion modules, communicates with the outside through a rear panel network port, communicates with the main and standby chassis boxes through a DB9 hole, controls the S-band frequency conversion device to use through a front panel key, and controls a front panel screen to display the current setting state and information. And controlling the front panel indicator lamp to display the module state.

The control module 7 comprises an up-conversion control interface, a down-conversion control interface, a key control interface, a network interface control interface, a main and standby communication interface, an indicator light control interface, a screen control interface, a power supply interface and a software updating interface.

(1) The up-conversion control interface is connected with the control interface of the up-conversion module, and the up-conversion module is controlled and detected through the interface.

(2) The down-conversion control interface is connected with the control interface of the down-conversion module, and the down-conversion module is controlled and detected through the interface.

(3) The key control interface is connected with the front panel keys, and the control module 7 can be controlled by the keys so as to control the whole S-band frequency conversion device.

(4) The network control interface is connected with the network port of the rear panel, and the control module 7 can be remotely controlled by a computer so as to control the whole S-band frequency conversion device.

(5) The main and standby communication interfaces are connected with the DB9 interface of the back panel, and the main and standby chassis boxes communicate with each other through the interface.

(6) The indicating lamp control interface is connected with the front panel indicating lamp and is used for displaying the state of the module by controlling the indicating lamp to be lightened.

(7) The screen control interface is connected with the front panel screen and displays the current equipment setting state and information through the control screen.

(8) The power interface is connected with the DC +5V interface, and the power module 8 provides +5V direct current for the control module 7 through the interface.

(9) And the software updating interface is used for updating the software.

5. Front panel

The front panel is provided with four monitoring output interfaces (SMA-K) which can be used for monitoring input and output signals of the up-conversion module and the down-conversion module respectively; the front panel is provided with a liquid crystal display screen for displaying the current equipment setting state and information; the front panel is provided with six keys and is displayed on a screen so as to locally control the S-band frequency conversion device; the front panel is provided with an LED indicator light for displaying the module state; the front panel is also provided with a power switch for controlling the power supply of the S-band frequency conversion device.

The front panel includes:

a power switch: the alternating current is turned on/off.

An indicator light area: and displaying the working state of each function of the system.

A display area: the state set at the present stage can be displayed through the display screen.

And (4) pressing a key area: in local control, system parameters can be set through keys.

And (3) outputting monitoring signals of an upper channel and a lower channel: the transmitting channel monitoring port comprises intermediate frequency output monitoring and radio frequency output monitoring, and the amplitude difference between a monitoring signal and a main channel signal is minus 30 +/-1 dB; the receiving channel monitoring comprises intermediate frequency output monitoring and radio frequency output monitoring, and the amplitude difference between a monitoring signal and a main channel signal is minus 20 +/-1 dB.

6. Rear panel

The rear panel is provided with five signal interfaces (N/SMA), namely an external standard frequency input interface, an up-conversion intermediate frequency input interface, an up-conversion radio frequency output interface, a down-conversion radio frequency input interface and a down-conversion intermediate frequency output interface; the rear panel is also provided with a three-phase power socket for connecting 220V alternating current; the rear panel is provided with a grounding post for connecting with the external ground; the rear panel is provided with a network interface, and the S-band frequency conversion device can be remotely controlled through a computer; the back panel is provided with a DB9 interface and is connected with the main and standby case boxes through a DB9 cross line to realize information interaction of the main and standby case boxes.

The rear panel includes:

a power socket: labeled as "X7 power interface," three pin ac interface. The input power source is single-phase alternating current with the frequency of 50 +/-1 Hz and the voltage of 220 +/-22V.

Grounding columns: labeled "X8 ground," the chassis connects to ground.

A network port socket: the network port marked as X6 is a 100 BASE-RJ45 connection port, and can be remotely controlled through the network port.

A main machine and standby machine connecting port: the connector is a communication connector between the main machine and the standby machine and is in the form of a DB 9-pin.

A down-conversion port: the label "X1 RF signal input" is the RF input port, the input range "-75- — 15 dBm".

The label "X2 intermediate frequency output port" is the intermediate frequency output port, and the output range is "-55-10 dBm".

Up-conversion port: the label "X4 IF input port" is IF input port, and the input range is-40- — 5 dBm.

The label "X3 radio frequency signal output" is a radio frequency output port, and the output range is-25-10 dBm ".

External reference input interface: the label is X5 external frequency scale input, the external 10MHz frequency scale input port, and the input range is 0-13 dBm.

The overall functional requirements of the S-band frequency conversion device are as follows:

1. completing the frequency conversion of the signal;

2. the setting and the query of the working state of the equipment can be finished by the front panel of the equipment and a remote control computer;

3. the external frequency standard input is provided, and the automatic detection and switching of the internal and external frequency standards can be completed;

4. under the state of the internal frequency standard, other performance indexes can be met;

5. the equipment is in a 1:1 backup mode (a backup controller is not needed), and the main equipment is automatically switched to the standby equipment when the main equipment fails (the equipment can be used as 1:1 backup and single-machine equipment);

6. a monitoring interface having input and output signals;

7. output power detection can be performed;

8. the switching of the main standby equipment can be completed locally or remotely by a computer;

9. the frequency converter can remotely or locally modify the equipment information and address;

10. the first startup gain is the minimum value, and the setting of the frequency converter before shutdown is called every startup;

11. the frequency converter is provided with two channels which are divided into an up-conversion channel 1 and a down-conversion channel 2, and the gain of the two channels is controlled independently; s wave bands can be switched through configuration, S frequencies of two channels are switched simultaneously, and the frequencies of radio frequency ends of frequency converters at the same moment are consistent;

12. 1:1 redundancy hot backup work, when one frequency converter is in a maintenance state (the interface of the frequency converter is suspended or is powered off, and the like), the work of the other frequency converter is not influenced.

For the above functions and indexes, what is most difficult to implement for the present invention is also the most important of the fault determination and the interactive communication between the main chassis and the standby chassis, and the switching between the main chassis and the standby chassis after the fault determination.

The judgment conditions involved in the switching of the main case and the standby case comprise: 1. by monitoring the up-conversion and down-conversion channel gain state and the set state, whether the gain state exceeds the range or not is compared (the input and output power values are detected, and the set value of the attenuator is calculated). 2. The phase locked loop locks to indicate whether normal. 3. And monitoring whether the current of each component in the frequency converter is normal or not.

When the following abnormality is detected, the main case does not switch the standby case, and the main case works normally but gives alarm information.

And (3) alarm conditions:

the external frequency standard has no input, the input power of the intermediate frequency signal of the up-conversion channel 1 exceeds the range, and the input power of the radio frequency signal of the down-conversion channel 2 exceeds the range.

The process of judging when the main case and the standby case are switched comprises the following steps:

(1) the up-down conversion module and the down-conversion module detect the power of the input signal and the output signal and provide analog voltage data to the control module 7 to identify the power of the input signal and the output signal; when the input signal exceeds the upper and lower limits of the input signal power specified by the S-band frequency conversion device, judging to alarm, lighting a front panel alarm indicator lamp and displaying specific alarm information on a screen; the control module 7 switches the main case to the standby case through the monitored channel gain state and the set state out of range (detected input and output power values, calculated by the set value of the attenuator), the front panel fault indicator lamp lighting screen of the standby case is switched to shut down and upload the fault reason to the remote control computer, the fault reason is stored locally, and the standby case is started to become the main case.

(2) The up-down conversion module and the down-conversion module provide the locking indication of the local oscillator to the control module 7 for judgment; when the local oscillator is not locked, the main case is switched to the standby case, the front panel fault indicator lamp is turned on, the screen is turned on, the fault reason is uploaded to the remote control computer and is stored locally, and the standby case is started to become the main case.

(3) The control module 7 is also provided with a current detector for detecting the working current of the up-conversion module and the down-conversion module to judge the working state of the up-conversion module and the down-conversion module, if the current exceeds a set threshold value, the main case is switched to a spare case front panel fault indicator lamp to light a screen, to close and upload a fault reason to a remote control computer and to locally store the fault reason, and the spare case is started to become the main case.

The three points form a judgment mechanism for switching the main case and the standby case.

When the main case of the S-band frequency conversion device works, the standby case is in a standby state, that is, the power supply of the up-conversion channel 2 and the down-conversion channel 2 (the inside of the frequency converter is divided into the up-conversion channel 1 and the down-conversion channel 2) is in an off state, the display screen is in an off state, and the control part is in an on state. The main case uploads the working state to the standby case at intervals; when the channel of the main case is in fault, the main case sends a command to the standby case, the standby case is started after receiving the command, the up-down conversion channel 2 and the down-down conversion channel 2 are powered on, the display screen is powered on, the control part is set according to the working state uploaded by the main case, and all units start to work; the starting time mainly comprises communication time, power supply switching time and time for setting by the control part according to the working state uploaded by the main case, the total time is about 80ms, and the normal work of the equipment is not influenced due to short switching time.

The S-band frequency conversion device is changed into a case form on the basis of the original module, the upper frequency conversion module, the lower frequency conversion module, the power supply module 8 and the control module 7 are integrated in one case, then the two cases are respectively used as main and standby cases and are installed in a plurality of platforms in a complete machine form, and a set of complete novel S-band frequency converter is formed. When the main case of the invention fails, the main case can be quickly switched to the standby case to work within 100ms, and the operation of the whole platform can not be basically influenced due to short switching time, thereby solving the problem of maintenance without shutdown when the S-band frequency conversion device fails.

The invention adds the monitoring interfaces of up-conversion and down-conversion input and output on the basis of internally monitoring input and output signals to judge faults, and can observe signals input into the S-band frequency conversion device and output from the S-band frequency conversion device through a measuring instrument. The method can correct and visually judge whether the fault is consistent with the fault reported by the equipment.

Claims

1. An S-band frequency conversion device is characterized in that: the main case uploads the working state to the standby case in real time, when the main case fails in self detection, the main case is stopped and switched to the standby case, and the standby case automatically restores the working state according to the uploading state data of the main case before the failure.

2. An S-band frequency conversion device according to claim 1, characterized in that: the main case and the standby case respectively comprise an up-conversion module, a down-conversion module, a power module (8), a control module (7), a front panel and a rear panel; the up-conversion module converts the intermediate frequency signal 70MHz +/-12 MHz into an S-band signal, synchronizes an external standard frequency clock signal and provides a reference clock signal for the down-conversion module; the down-conversion module converts the S-band signal into an intermediate frequency signal of 70MHz +/-12 MHz; the power supply module (8) converts 220V alternating current into +12V direct current and +5V direct current; the control module (7) controls and detects the upper and lower frequency conversion modules, communicates with the outside through a rear panel network port, realizes the communication of the main and standby case boxes through a DB9 hole, and controls a front panel screen to display the current setting state and information.

3. An S-band frequency conversion device according to claim 2, characterized in that: the up-conversion module comprises an up-conversion channel (1), an F0_ up-filter (3), an F1_ up-filter (5), an intermediate frequency input interface, an intermediate frequency input monitoring interface, a radio frequency output monitoring interface, an external frequency standard input interface, a reference clock output interface, a power interface and a control interface, wherein the up-conversion channel (1) comprises a clock circuit, a local oscillator circuit, an intermediate frequency channel circuit, a mixing circuit and a radio frequency channel circuit.

4. An S-band frequency conversion device according to claim 2, characterized in that: the down-conversion module comprises a down-conversion channel (2), an F0_ lower filter (4), an F1_ lower filter (6), a control module (7), a source module, an intermediate frequency output interface, an intermediate frequency output monitoring interface, a radio frequency input monitoring interface, a reference clock input interface, a power supply interface and a control interface, and the up-conversion channel (1) comprises a local oscillator circuit, a radio frequency channel circuit, a mixing circuit and an intermediate frequency channel circuit.

5. An S-band frequency conversion device according to claim 1, characterized in that: the control module (7) circuits include 130 circuits for controlling the whole chassis to operate, STM32 circuits for communicating with a remote computer through a network port and M25P16 circuits.

6. An S-band frequency conversion device according to claim 1, characterized in that: the front panel comprises a power switch, an indicator light area, a display area, a key area and upper and lower channel monitoring signal outputs, the upper and lower channel monitoring signal outputs comprise a channel monitoring port and a receiving channel monitoring, the transmitting channel monitoring port comprises an intermediate frequency output monitoring and a radio frequency output monitoring, and the amplitude difference between a monitoring signal and a main channel signal is-30 +/-1 dB; the receiving channel monitoring comprises intermediate frequency output monitoring and radio frequency output monitoring, and the amplitude difference between a monitoring signal and a main channel signal is minus 20 +/-1 dB.

7. An S-band frequency conversion device according to claim 1, characterized in that: the rear panel comprises a power socket, a grounding column, a network port socket, a main and standby case connecting port, a down-conversion port, an up-conversion port and an external reference input interface.

8. A main and standby chassis switching control method of an S-band frequency conversion device based on any one of claims 1 to 7, characterized in that the switching decision follows the following principle: 1. comparing the channel gain state of the up-conversion and down-conversion with the set state by monitoring, and switching from the main case to the standby case if the channel gain state exceeds the range of the set state; 2. detecting whether the locking indication of the phase-locked loop is normal or not, and if the locking indication of the phase-locked loop is abnormal, switching from the main case to the standby case; 3. and monitoring whether the current of each component in the frequency converter is normal or not, and switching from the main case to the standby case if the current of each component in the frequency converter is abnormal.

9. The main and standby chassis switching control method according to claim 8, wherein: when no input of an external frequency standard, an input power of an intermediate frequency signal of the up-conversion channel (1) exceeding a range and an input power of a radio frequency signal of the down-conversion channel (2) exceeding the range are monitored, the main case is not switched to the standby case, the main case works normally, and alarm information is given.

10. The main and standby chassis switching control method according to claim 8, wherein: the method comprises the following steps:

(1) the detection up-conversion module and the down-conversion module detect the power of input and output signals and provide analog voltage data to the control module (7) to identify the power of the input and output signals; when the input signal exceeds the upper and lower limits of the input signal power specified by the S-band frequency conversion device, judging to alarm, lighting a front panel alarm indicator lamp and displaying specific alarm information on a screen; the control module (7) switches the main case to the standby case through the monitoring channel gain state and the set state exceeding the range, the front panel fault indicator lamp of the standby case is switched on, the screen is turned on, the fault reason is uploaded to the remote control computer and is locally stored, and the standby case is started to become the main case;

(2) the up-down conversion module and the down-conversion module provide the locking indication of the local oscillator to a control module (7) for judgment; when the local oscillator is identified not to be locked, the main case is switched to a standby case, the front panel fault indicator lamp is turned on, the screen is turned on, the fault reason is uploaded to a remote control computer and is locally stored, and the standby case is started to become the main case;

(3) the control module (7) is also provided with a current detector for detecting the working current of the upper and lower frequency conversion modules to judge the working states of the upper and lower frequency conversion modules, if the current exceeds a set threshold value, the main case is switched to a spare case front panel fault indicator lamp to light a screen, the screen is closed, the fault reason is uploaded to a remote control computer and is locally stored, and the spare case is started to become the main case.