CN209949081U - Digital low-frequency time code all-solid-state transmitter - Google Patents
Digital low-frequency time code all-solid-state transmitter Download PDFInfo
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- CN209949081U CN209949081U CN201920933285.2U CN201920933285U CN209949081U CN 209949081 U CN209949081 U CN 209949081U CN 201920933285 U CN201920933285 U CN 201920933285U CN 209949081 U CN209949081 U CN 209949081U
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Abstract
The utility model discloses a full solid state transmitter of digital low frequency time code, including exciter, signal generation and processing subsystem, power amplifier unit, signal generation and processing subsystem include digital ladder generator, digital distributor, the radio frequency analog signal of exciter output converts digital signal into through digital ladder generator, digital distributor divides these digital signal into groups again, distributes, provides drive signal and enlargies for power amplifier unit; the power synthesis network carries out power synthesis on the amplified driving signals, matching, filtering and tuning are completed through the tuning and matching filtering subsystem, then the output is carried out, and the signals are radiated out through an antenna; the high-voltage direct-current power supply is formed by a distributed soft switching power supply, the measurement and control equipment is used for guaranteeing the normal work of the transmitter, and the acquisition of the state information of each equipment of the transmitter is completed through a PLC (programmable logic controller) of a console; the simulation load subsystem is electrically connected with the tuning and matching filter subsystem.
Description
Technical Field
The utility model belongs to the technical field of the ground radio time service, especially, relate to a digital low frequency time code all solid state transmitter.
Background
The existing low-frequency time code all-solid-state transmitter has the following technical conditions: 1. the existing power switch device adopts a silicon-based MOSFET, the on-state resistance is large, the on-state loss is large, and the efficiency is more than or equal to 92%. 2. The existing signal generation and processing subsystem adopts a pure hardware implementation mode, is built by an analog discrete device, has poor synchronization consistency and pulse leading edge instability in a sub-millisecond order. 3. The high-voltage direct-current power supply is in a centralized chopping mode, is simple and mature, and has low reliability and poor separability because the whole machine has no power output once a fault occurs. 4. The transmitter measurement and control equipment adopts an FPGA and a singlechip platform, so that the technical maturity is not high, and the strong electromagnetic interference resistance is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem, providing a digital low-frequency time code all-solid-state transmitter which is mainly applied to a ground radio time service system.
In order to realize the purpose of the utility model, the technical proposal of the utility model is that:
a kind of digitized low-frequency time code all solid state transmitter, including exciter, signal generation and processing subsystem, power amplifier unit, the signal generation and processing subsystem includes the digital step wave generator, digital distributor, the radio frequency analog signal that the said exciter outputs is changed into the digital signal through the digital step wave generator, the said digital distributor is grouped, distributed these digital signals, provide the drive signal for the power amplifier unit to amplify; the method is characterized in that: the power synthesis network carries out power synthesis on the amplified driving signals, matching, filtering and tuning are completed through the tuning and matched filtering subsystem, and then the amplified driving signals are output and radiated out through an antenna; the high-voltage direct-current power supply is formed by adopting a distributed soft switching power supply; the measurement and control equipment is used for ensuring the normal work of the transmitter, and the acquisition of the state information of each equipment of the transmitter is completed through a PLC (programmable logic controller) of the console; the simulation load subsystem is electrically connected with the tuning and matched filtering subsystem and is used for daily equipment maintenance and overhaul.
Preferably, the power amplifier unit is controlled by a phase-shifted full bridge, so that the power switch tubes are not turned on or off simultaneously, and the turn-on or turn-off time of each power switch tube is controlled.
Preferably, the signal generating and processing subsystem converts the radio frequency modulated analog signal output by the exciter into a digital signal, sets the digital signal according to a time sequence and blind area time required by the power amplification units, and finally performs signal distribution to drive each power amplification unit. The digital step wave generator receives the pulse synchronous signal output by the exciter and is used for reducing the instability of the leading edge of the final transmitting signal, thereby improving the time precision.
Preferably, the high-voltage direct-current power supply is formed by connecting a plurality of switching power supply modules in parallel, when one or more switching power supply modules are in fault, the high-voltage direct-current power supply can automatically quit working, other modules automatically equalize current, and the power supply can still keep power output.
Preferably, the measurement and control equipment finishes the collection of state information of each equipment of the transmitter through an industrial PLC controller, then sends the collected data to an industrial personal computer CPU of the transmitter, the industrial personal computer CPU sends some key sampling states to a man-machine control display screen for display on one hand, and carries out logic operation and processing on the collected data on the other hand, sends an instruction responding to the current equipment state according to the collected data and a corresponding processing result, and outputs the instruction through an output module of the PLC, thereby finishing the control of the corresponding equipment of the transmitter; meanwhile, the measurement and control system uploads the acquired data to the broadcast monitoring management subsystem through the PROFINET network, and receives and responds to a control instruction issued by the monitoring system.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses the all solid state transmitter of code has adopted multinomial new technology, new material, new device when the low frequency, has greatly improved the all solid state transmitter technical level of code when the low frequency, 1 novel power amplifier unit adopts SiC MOSFET and SiC Diode, and on-state resistance and switching characteristic are better, and drive power is littleer, and efficiency is more than or equal to 97%; 2. the software digital pulse synchronization technology is adopted, the control precision of the leading edge of the pulse is improved, and the time service precision is improved by one order of magnitude; 3. the distributed software switching power supply design is adopted, and an uninterruptible power supply is adopted for supplying power to the counterweight equipment, so that the reliability of the whole machine is improved; 4. and an industrial PLC control technology is adopted, so that the maturity is high and the strong electromagnetic interference resistance is strong.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a structural diagram of the digital low-frequency time code all-solid-state transmitter of the present invention.
FIG. 2 is a schematic diagram of a power amplifier unit circuit in an embodiment;
fig. 3 is a waveform diagram of input and output of the power amplifier unit in the embodiment.
Fig. 4 is a schematic diagram of a signal generation and processing subsystem in an embodiment.
Fig. 5 is a schematic diagram of a high-voltage dc power supply in an embodiment.
Fig. 6 is a schematic diagram of the measurement and control device in the embodiment.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1-6, a digital low-frequency time code all-solid-state transmitter includes an exciter, a signal generating and processing subsystem, and a power amplifier unit, where the signal generating and processing subsystem includes a digital ladder generator and a digital distributor, a radio-frequency analog signal output by the exciter is converted into a digital signal by the digital ladder generator, and the digital distributor groups and distributes the digital signal and provides a driving signal to the power amplifier unit for amplification; the power synthesis network carries out power synthesis on the amplified driving signals, matching, filtering and tuning are completed through the tuning and matched filtering subsystem, and then the amplified driving signals are output and radiated out through an antenna; the high-voltage direct-current power supply is formed by adopting a distributed soft switching power supply; the measurement and control equipment is used for ensuring the normal work of the transmitter, and the acquisition of the state information of each equipment of the transmitter is completed through a PLC (programmable logic controller) of the console; the simulation load subsystem is electrically connected with the tuning and matched filtering subsystem and is used for daily equipment maintenance and overhaul.
Preferably, the power amplifier unit adopts a SiC power device and a drive protection technology thereof, the power amplifier unit adopts phase-shifted full-bridge control to enable the power switch tubes not to be switched on or switched off at the same time, and the switching-on or switching-off time of each power switch tube is controlled. The power amplifier unit adopts a novel SiC device and a drive protection circuit, the integration level is improved, the switch and the on-state loss are reduced, the heat dissipation device is reduced, and the volume is reduced by half. The SiC device has excellent switching performance, reduces electromagnetic radiation in the switching process, and can simplify an auxiliary circuit of a power amplifier unit. The SiC device has strong environmental adaptability and is suitable for being used in a high-temperature environment.
Preferably, the signal generating and processing subsystem converts the radio frequency modulated analog signal output by the exciter into a digital signal, sets the digital signal according to a time sequence and blind area time required by the power amplification units, and finally performs signal distribution to drive each power amplification unit. The digital step wave generator receives the pulse synchronous signal output by the exciter and is used for reducing the instability of the leading edge of the final transmitting signal, thereby improving the time precision. The existing signal generation and processing subsystem only receives the radio frequency modulation signal generated by the analog modulator and processes the analog signal, so that the uncertainty is large; the signal generation and processing subsystem receives the digital coding information, the 10MHz frequency signal and the 1PPS synchronous signal output by the modulator, the signal output delay consistency is high, and the pulse leading edge stability is high.
Preferably, the high-voltage direct-current power supply is formed by connecting a plurality of switching power supply modules in parallel, when one or more switching power supply modules are in fault, the high-voltage direct-current power supply can automatically quit working, other modules automatically equalize current, and the power supply can still keep power output and is used for guaranteeing the normal working of the transmitter. The high-voltage direct-current power supply adopts a soft switching power supply, adopts a high-frequency pulse width modulation technology, a silicon carbide technology and a soft switching technology, and has the characteristics of high efficiency, good electromagnetic compatibility, low noise, low temperature rise, high reliability, excellent electrical performance, small volume, convenience in installation, simplicity in maintenance and the like.
Preferably, the measurement and control device is used for ensuring the normal work of the transmitter, the collection of the state information of each device of the transmitter is completed through the industrial PLC controller, then the collected data are sent to the industrial personal computer CPU of the transmitter, the industrial personal computer CPU sends some key sampling states to the man-machine control display screen for displaying on one hand, and carries out logic operation and processing on the collected data on the other hand, and sends out an instruction responding to the current device state according to the collected data and a corresponding processing result, and outputs the instruction through the output module of the PLC, thereby completing the control of the corresponding device of the transmitter; meanwhile, the measurement and control system uploads the acquired data to the broadcast monitoring management subsystem through the PROFINET network, and receives and responds to a control instruction issued by the monitoring system.
The control part of the measurement and control subsystem mainly collects the state information of each device of the transmitter through a PLC controller, then sends the collected data to a CPU, on one hand, the CPU sends some key sampling states to a man-machine control display screen for displaying, on the other hand, the CPU carries out logic operation and processing on the collected data, sends an instruction responding to the current device state according to the collected data and corresponding processing results, and outputs the instruction through an output module of the PLC, thereby completing the control of the corresponding device of the transmitter. Meanwhile, the measurement and control subsystem uploads the acquired data to the broadcast monitoring management subsystem through the PROFINET network, and receives and responds to a control instruction issued by the monitoring system.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (5)
1. A kind of digitized low-frequency time code all solid state transmitter, including exciter, signal generation and processing subsystem, power amplifier unit, the signal generation and processing subsystem includes the digital step wave generator, digital distributor, the radio frequency analog signal that the said exciter outputs is changed into the digital signal through the digital step wave generator, the said digital distributor is grouped, distributed these digital signals, provide the drive signal for the power amplifier unit to amplify; the method is characterized in that: the power synthesis network carries out power synthesis on the amplified driving signals, matching, filtering and tuning are completed through the tuning and matched filtering subsystem, and then the amplified driving signals are output and radiated out through an antenna; the high-voltage direct-current power supply is formed by adopting a distributed soft switching power supply; the measurement and control equipment is used for ensuring the normal work of the transmitter, and the acquisition of the state information of each equipment of the transmitter is completed through a PLC (programmable logic controller) of the console; the simulation load subsystem is electrically connected with the tuning and matched filtering subsystem and is used for daily equipment maintenance and overhaul.
2. The all-solid-state transmitter of claim 1, wherein the power amplifier unit is controlled by a phase-shifted full bridge to enable the power switches to be turned on or off at different times and to control the on or off time of each power switch.
3. The all-solid-state transmitter of claim 1, wherein the signal generating and processing subsystem converts the rf modulated analog signal outputted from the exciter into a digital signal, and performs signal distribution to drive each power amplifier unit according to the timing sequence and dead zone time required by the power amplifier unit.
4. The all-solid-state transmitter of claim 1, wherein the high-voltage dc power supply is composed of a plurality of switching power modules connected in parallel, and when one or more switching power modules fail, the power supply can automatically quit operation, and other modules can automatically equalize current, and the power supply can still maintain power output.
5. The digital low-frequency time code all-solid-state transmitter according to claim 1, wherein the measurement and control device finishes the collection of state information of each device of the transmitter through an industrial PLC controller, and then sends the collected data to an industrial personal computer CPU of the transmitter, the industrial personal computer CPU sends some key sampling states to a man-machine control display screen for display on one hand, and carries out logic operation and processing on the collected data on the other hand, sends out an instruction responding to the current device state according to the collected data and a corresponding processing result, and outputs the instruction through an output module of the PLC, thereby finishing the control of the corresponding device of the transmitter; meanwhile, the measurement and control system uploads the acquired data to the broadcast monitoring management subsystem through the PROFINET network, and receives and responds to a control instruction issued by the monitoring system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920933285.2U CN209949081U (en) | 2019-06-20 | 2019-06-20 | Digital low-frequency time code all-solid-state transmitter |
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| CN201920933285.2U CN209949081U (en) | 2019-06-20 | 2019-06-20 | Digital low-frequency time code all-solid-state transmitter |
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