CN104516289A - FPGA (field programmable gate array) based control device and FPGA based control method for satellite-borne microwave radiometer - Google Patents
FPGA (field programmable gate array) based control device and FPGA based control method for satellite-borne microwave radiometer Download PDFInfo
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- CN104516289A CN104516289A CN201310462017.4A CN201310462017A CN104516289A CN 104516289 A CN104516289 A CN 104516289A CN 201310462017 A CN201310462017 A CN 201310462017A CN 104516289 A CN104516289 A CN 104516289A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention provides an FPGA (field programmable gate array) based control system and an FPGA based control method for a satellite-borne microwave radiometer. The system comprises a 1553 communication module, a data collection module, an AGC (automatic gain control) module and an antenna control module. The 1553 communication module is responsible for transmitting ground commands to each module and controlling the state of the whole satellite-borne microwave radiometer, the scanning mode of an antenna and AGC settings. The data collection module is responsible for collecting auxiliary data such as scientific data and temperatures of the satellite-borne microwave radiometer in a data collection circuit and transmitting the data to the 1553 communication module. The 1553 communication module packages and transmits the data to a satellite control center and then transmits the data to the ground. The AGC module is responsible for executing AGC setting commands of the ground. The antenna control module executes antenna scanning mode commands of the ground and transmits the state and an angle value of the antenna to the 1553 communication module. The 1553 communication module transmits the state and the angle value of the antenna to the satellite control center and to the ground sequentially.
Description
Technical field
The present invention relates to a kind of control device of satellite-borne microwave radiometer, namely the present invention relates to a kind of control device and method of the satellite-borne microwave radiometer based on FPGA.
Background technology
Domestic in the design of satellite-borne microwave remote sensor in the past, digital processing part be designed with two kinds of methods, a kind of employing designs centered by 80C31 device, and peripheral circuit is then made up of discrete digital circuit chip.Adopting the advantage carrying out in this way designing is technology maturation, and technical risk is less, and utilizable resource is many.Due to the restriction by this microprocessor chip and peripheral circuit, the shortcoming of traditional scheme is that shared volume is comparatively large, and power consumption is high.Another kind method designs based on the fpga chip of SRAM, although this method reaches the requirement of system compact, causes the storage data of SRAM to produce upset by high-energy neutron spontaneous in earth atmosphere.And these two kinds of methods are all based on processor technology, program controls each peripheral components time-sharing work by flow line flow path, just embodies the defect of this control method when each peripheral module needs to control simultaneously.
Field programmable gate array (FPGA) based on Flash technology and antifuse technology have anti-configuration upset immunocompetence, this ensures more reliably for AEROSPACE APPLICATION provides, decrease because of high-energy neutron cause configure loss again.The present invention is based on the method for the control device employing modular design that field programmable gate array realizes, compared with control with program circuitization system, each module can simultaneously concurrent working, and improve the efficiency of control, is that the collection of data has higher real-time with communicating.
Summary of the invention
The object of the invention is, the invention provides a kind of control device and method of the satellite-borne microwave radiometer based on FPGA for overcoming the problems referred to above.
To achieve these goals, the invention provides a kind of control device of the satellite-borne microwave radiometer based on FPGA, it is characterized in that, described device comprises:
Data acquisition circuit, for data acquisition;
Data acquisition module, carries out for control data Acquisition Circuit the collection comprising science data and temperature data, and the data collected are transferred to 1553 communication modules;
AGC control module, the instruction that the AGC sent for performing ground is arranged; With
Antenna control module, for the instruction of place of execution surface antenna scan pattern, and reaches 1553 communication modules by the state of antenna and angle value; With
1553 communication modules, for by the command on ground to described data acquisition module, AGC control module and antenna control module, control the setting of the state of satellite-borne microwave radiometer, the scan pattern of antenna and AGC, and the data of data collecting module collected and the antenna condition received and angle value are passed to Ssatellite control center;
Wherein, described data acquisition circuit is: the isolation amplifier of several parallel connections, the output of isolation amplifier are connected with MUX, the output of described MUX is connected with a digital to analog converter, the numerical data that the science data of multiple passage and multi way temperature data is converted to that this data acquisition circuit is used at times gathers for described data acquisition module, the channel selecting that described data acquisition module carries out sometime for controlling MUX.
In technique scheme, described AGC control circuit comprises N number of D/A converter, and this AGC control circuit is controlled by described AGC control module;
The numerical value that each passage AGC that described AGC control module receives ground by 1553 communication modules injects, controls the numerical value that described AGC control circuit arranges each passage AGC injection; AGC control module is also according to the image data that described data acquisition module provides, judge that the output voltage of the receiver for radiometer passage gathered is whether within the numerical range preset, if exceed the numerical range that this is predetermined, then automatically adjust the numerical value of AGC, otherwise do not adjust the numerical value of AGC, and specifically press dichotomy adjustment when automatically adjusting AGC numerical value, namely when being greater than certain higher value, the value of AGC is past lowers, toward raising when being less than certain smaller value, described higher value and smaller value obtain according to statistical method;
Wherein, make the output of receiver within the scope of a certain setting by the gain of described AGC control circuit control receiver.
The amplifier isolation of the first order of above-mentioned data acquisition circuit can provide an infinitely-great input impedance;
Data acquisition module is to the coding on a MUX a certain road of gating, it is to be converted that this road signal be strobed enters AD converter etc. by the output port of MUX, then data acquisition module starts the instruction of conversion to AD converter, and voltage signal to be converted for this road is converted to digital signal and outputs to the reading of number bus port waits data acquisition module by AD converter;
Data acquisition module converts the auxiliary datas such as the science data of multiple passage and multi way temperature data to numerical data by control MUX and AD converter timesharing and sends to 1553 communication modules packings.
In addition, the present invention also provides a kind of control method of the satellite-borne microwave radiometer based on FPGA, described method receives steering order by 1553B communication module, controls respectively, specifically comprise following steps to data acquisition module, AGC control module and antenna control module:
Step 101) control automatic and non-automatic pattern according to the setting of each channel data of surface instruction control AGC control module and AGC;
Step 102) control data acquisition module collection period and order;
Step 103) scan pattern of antenna control module is set;
Wherein, 1553B communication module also reaches ground the data of AGC control module, data acquisition module and antenna control module and information package, for the real-time monitoring on ground.
Above-mentioned steps 101) be specially:
The numerical value that each passage AGC that AGC control module receives ground by 1553 communication modules injects, this numerical value is converted into the coding needed for AGC control circuit, be specially: the D/A converter first exporting this passage of channel number coding gating that will inject, then the AGC numeric coding changed is outputted to AGC data bus, the voltage that the D/A converter of AGC control circuit converts thereof into simulation exports to the AGC control port of receiver; Described AGC control circuit is the parallel digital to analog converter in some roads, and each digital to analog converter receives the passage gating code and AGC data that AGC control module sends simultaneously.
Above-mentioned steps 102) be specially:
Data acquisition circuit is: the isolation amplifier of several parallel connections, the output of isolation amplifier are connected with MUX, and the output of described MUX is connected with a digital to analog converter; Data acquisition module sends one in MUX described in a coding gating, it is to be converted that this road signal be strobed enters analog to digital converter etc. by the output port of MUX, then data acquisition module starts the instruction of conversion to digital to analog converter, and voltage signal to be converted for this road is converted to digital signal and outputs to the reading of number bus port waits data acquisition module by digital to analog converter; Data acquisition module converts the auxiliary datas such as the science data of multiple passage and multi way temperature data to numerical data by control MUX and digital to analog converter timesharing and is sent to 1553 communication modules packings;
Above-mentioned steps 103) be specially:
Injected the instruction of antenna scanning patterns of change by uphole equipment, arrive Ssatellite control center by satellite wireless communication, then inject 1553 communication modules through 1553 buses;
After 1553 communication modules receive and inject instruction, decomposition obtains antenna scanning pattern, issue antenna control module again, the antenna scanning pattern injected on ground is obtained via antenna control module decoding, enter the cycle period of corresponding pattern, produce corresponding time sequential pulse and export to step motor control antenna rotary scanning;
Antenna control module generates according to the umber of pulse provided the aerial angle information that a real-time antenna rotates to and sends to 1553 communication modules, 1553 communication modules are again aerial angle Value Data, the unified packet forming certain format of temperature data, arrives ground control equipment again via 1553 buses, Ssatellite control center.
The collection finite state machine one of above-mentioned data acquisition module has 8 states, is respectively: X_idle, X_ad_start, X_delay, X_ad_get1, X_ad_get2, X_ad_save, X_add_judge, X_ad_done; Wherein,
X_idle is waiting status, in this condition Ad_done=0, Add=0000, count=0; Be in this state when Ad_start=0 always; When 1553 communication modules arrange Ad_start=1, state machine is transformed into X_ad_start state;
X_ad_start starts transition status, in this condition Ad_cs=0, R/C=0, and time initial, count=0, count often add 1 through a clock, are in this state when count<5 always, are transformed into X_delay state as count=5;
X_delay is delay state, and inner counting variable counting starts counting; Delay_done=0 time initial, arranges Delay_done=1 after counting variable reaches the value of setting; When Delay_done=0, be in this state, when Delay_done=1, state machine is transformed into X_ad_get1 state always;
X_ad_get1 state reads most-significant byte data mode, and Ad_cs=0, R/C=1, H/L=1, count often add 1 through a clock in this condition, are in this state when count<5 always; X_ad_get2 state is transformed into as count=5;
X_ad_get2 state reads least-significant byte data mode, and Ad_cs=0, R/C=1, H/L=0, count often add 1 through a clock in this condition, are in this state when count<5 always; X_ad_save state is transformed into as count=5;
X_ad_save state data is stored into the state of FIFO, in this condition by read data assignment to the data bus Data of FIFO, to the effective impulse of a fifo_wr, write the image data of 16 to FIFO, this image data is jointly obtained by X_ad_get1 state and X_ad_get2 state; Save_done=0 time initial, arranges save_done=1 after write; When save_done=0, be in this state, when save_done=1, state machine is transformed into X_add_judge state always;
X_add_judge state judges whether the channel counts gathered reaches the state of 16 passages, often enters once this state Add counting and add 1; When Add is less than 16, state machine proceeds to X_ad_start state, enters the circulation of next channel acquisition; When Add equals 16, represent that 16 passages all gather complete, now state machine proceeds to X_ad_done state;
X_ad_done state gathers complete state, arranges Ad_done=1 in this condition, notify that 1553 communication module 16 channel acquisition are complete; Time initial, count=0, count often add 1 through a clock; Being in this state when count<5 always, being transformed into X_idle state as count=5, waiting for that 1553 communication modules are by arranging Ad_start=1 to start acquisition state conversion next time;
Wherein, R/C reads and conversion switching signal, Ad_start information is used for 1553 communication module notification data acquisition modules and starts AD collection, Ad_done information is used for data acquisition module and notifies that 1553 communication module AD gather end, Ad_cs represents gating Ad conversion chip, and Add is passage gating signal.
In a word, the control method of the satellite-borne microwave radiometer based on FPGA provided by the invention and system can be communicated with ground with Ssatellite control center by 1553 buses, store the data that data acquisition circuit part reads, the auxiliary datas such as the science data of transmission satellite-borne microwave radiometer and temperature.The control system of the described satellite-borne microwave radiometer based on FPGA comprises: 1553 communication modules, data acquisition module, AGC control module and antenna control module, wherein 1553 communication modules to be responsible for the command on ground, to modules, controlling the state of whole satellite-borne microwave radiometer, the scan pattern of antenna, the setting of AGC.Data acquisition module is responsible for the auxiliary data such as science data and temperature of the satellite-borne microwave radiometer in image data Acquisition Circuit, these data is transferred to 1553 communication modules, then passes to Ssatellite control center by 1553 communication modules and pass to ground again.AGC control module is responsible for the instruction performing ground AGC setting.The instruction of antenna control module place of execution surface antenna scan pattern, and the state of antenna and angle value are passed to 1553 communication modules, then pass to Ssatellite control center by 1553 communication modules and pass to ground again.Described data acquisition circuit part is made up of N number of isolation amplifier, N number of multiway analog switch and an A/D converter, this data acquisition circuit part is controlled by data acquisition module, timesharing converts the auxiliary datas such as the science data of multiple passage and multi way temperature data to numerical data, for data collecting module collected.Described AGC control circuit part is made up of N number of D/A converter, this AGC control circuit part is controlled by AGC control module, the numerical value that each passage AGC that AGC control module can receive ground by 1553 communication modules injects, control AGC control circuit part arranges the numerical value that each passage AGC injects.The image data that AGC control module can also provide according to data acquisition module, judge whether within pre-set numerical range, if exceed preset range, then automatically adjust the numerical value of AGC, the gain being controlled receiver by AGC control circuit part makes the output of receiver within the scope needed.
Compared with prior art, technical advantage of the present invention is:
The all module of the present invention all realizes with finite state machine FSM, has speed fast, can meet the requirement of higher design frequency; Area is little, can meet the feature of the area requirements of design.And the design of FSM is clear understandable, more easily safeguard compared with the implementation based on processor soft core.
Accompanying drawing explanation
Fig. 1 is the interface diagram of data acquisition module provided by the invention and data acquisition circuit;
Fig. 2 is the workflow diagram of AGC control module provided by the invention;
Fig. 3 is antenna control module workflow provided by the invention;
Fig. 4 is AGC control module interface diagram provided by the invention;
The composition frame chart of Fig. 5 control system based on Flash technology FPGA satellite-borne microwave radiometer provided by the invention;
Fig. 6 is that 1553 control modules of the present invention are at the schematic diagram with ground communication;
Fig. 7 is data acquisition module of the present invention and other model calling figure;
Fig. 8 is the workflow diagram of data acquisition module of the present invention;
Fig. 9 is data acquisition module FSM state machine state transition diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, content of the present invention is described in detail.
In order to solve the problem that said system miniaturization and single-particle cause SRAM register to overturn, the object of the present invention is to provide a kind of control device for satellite-borne microwave radiometer, the satellite-borne microwave radiometer of its various AEROSPACE APPLICATION, high reliability, the system control device of high real-time.
To achieve these goals, the invention provides a kind of control device for satellite-borne microwave radiometer, comprise: FPGA internal circuit part and data acquisition circuit part, described FPGA internal circuit part is communicated with ground with Ssatellite control center by 1553 buses, the auxiliary datas such as the science data of transmission satellite-borne microwave radiometer and temperature, it is characterized in that
Described FPGA internal circuit part comprises: 1553 communication modules, data acquisition module, AGC control module, antenna control module 4 modules, wherein 1553 communication modules to be responsible for the command on ground, to modules, controlling the state of whole satellite-borne microwave radiometer, the scan pattern of antenna, the setting of AGC.Data acquisition module is responsible for the auxiliary data such as science data and temperature of the satellite-borne microwave radiometer in image data Acquisition Circuit, these data is transferred to 1553 communication modules, then passes to Ssatellite control center by 1553 communication modules and pass to ground again.AGC control module is responsible for the instruction performing ground AGC setting.The instruction of antenna control module place of execution surface antenna scan pattern, and the state of antenna and angle value are passed to 1553 communication modules, then pass to Ssatellite control center by 1553 communication modules and pass to ground again.
As shown in Figure 1, this data acquisition circuit comprises described data acquisition circuit part: multiple isolation amplifier, multiple multiway analog switch and an A/D converter.Wherein the amplifier buffer circuit of the first order can provide an infinitely-great input impedance, output impedance is almost nil, make the MUX of rear stage can obtain voltage signal as much as possible from voltage signal source, play again the effect of isolation, make the signal of each input not produce interference mutually.Each road signal of input only has a road signal to enter AD converter within the time of MUX, which offers a saving the quantity of AD converter, greatly provides cost savings.Data acquisition module is to the coding on a MUX a certain road of gating, it is to be converted that this road signal be strobed enters AD converter etc. by the output port of MUX, then data acquisition module starts the instruction of conversion to AD converter, and voltage signal to be converted for this road is converted to digital signal and outputs to the reading of number bus port waits data acquisition module by AD converter.Data acquisition module converts the auxiliary datas such as the science data of multiple passage and multi way temperature data to numerical data by control MUX and AD converter timesharing and sends to 1553 communication modules packings.
The interface of data acquisition module and data acquisition circuit is as shown in Figure 1:
The pattern of antenna scanning has: variable speed scanning pattern, uniform speed scanning pattern, stop mode, fault mode four kinds.
Antenna is by step motor control rotary scanning, and antenna control module exports a pulse to stepper motor, and stepper motor rotates 0.1 degree, and antenna control module exports 3600 pulses to stepper motor, and it is one week that stepper motor rotates 360 degree.Antenna control module has four systemic circulation cycles corresponding four kinds of scan patterns, produces corresponding time sequential pulse by the demand of each pattern.Injected the instruction of antenna scanning patterns of change by uphole equipment, arrive Ssatellite control center by satellite wireless communication, then be injected into 1553 communication modules of this device through 1553 buses.After 1553 communication modules receive and inject instruction, decomposition obtains antenna scanning pattern, issue antenna control module again, the antenna scanning pattern injected on ground is obtained via antenna control module decoding, enter the cycle period of corresponding pattern, produce corresponding time sequential pulse and export to step motor control antenna rotary scanning.The aerial angle information that antenna control module is rotated to by the antenna that calculating generation one is real-time according to the umber of pulse provided sends to 1553 communication modules, 1553 communication modules are again the science data of antenna angle angle value with other, temperature data, auxiliary data, the unified packet forming certain format such as system state, arrives ground control equipment again via 1553 buses, Ssatellite control center.Antenna control module workflow as shown in Figure 3.
The gain of receiver is controlled by the attenuator of receiver inside, and the value of decay needs a Control of Voltage simulated, and this voltage is directly outputted to the port of receiver by AGC control circuit part.
AGC control module workflow as shown in Figure 2.Injected the instruction of AGC setting by uphole equipment, arrive Ssatellite control center by satellite wireless communication, then be injected into 1553 communication modules of this device through 1553 buses.
The numerical value that each passage AGC that AGC control module receives ground by 1553 communication modules injects, is converted into the coding that AGC control circuit part needs by this numerical value.First export the D/A converter of this passage of channel number coding gating that will inject, then the AGC numeric coding changed is outputted to AGC data bus, the D/A converter of AGC control circuit part exports to the AGC control port of receiver with regard to the voltage converting thereof into simulation.AGC control module can also under AGC automatic control mode, judge whether within pre-set numerical range according to the image data that data acquisition module provides, if exceed preset range, then automatically adjust the numerical value of AGC, the gain being controlled receiver by AGC control circuit part makes the output of receiver within the scope needed.
1553 control modules provide the interface that a ground controls microwave meter systems, and each instruction that the control center's pool ground as microwave meter systems is injected and demand command other three module work.As shown in Figure 5, according to setting and the automatic and non-automatic pattern of AGC control of each channel data of surface instruction control AGC control module.The collection period of control data acquisition system and order.The scan pattern of antenna control module is set.And the data of these three modules and information package are passed to ground, assists ground real-time oversight control system whether working properly.As shown in Figure 6,1553 control modules are using 1553 bus marco chip BU65170 interfaces, space flight 1553 bus puppy parc with ground communication part.
Shown in the composition frame chart 5 of the FPGA spaceborne microwave radiometer system control device based on Flash technology provided by the invention.The known employing of composition graphs 4 control device provided by the invention can realize the Schema control to antenna, controls accordingly data acquisition circuit the receiving gain control of receiver and the instruction and data acquisition module of foundation receiver.Control device provided by the invention carries out two-way communication by 1553 buses and Ssatellite control center, and 1553 buses are by 1553 communication modules respectively to antenna, and receiver gain and data acquisition circuit control.Described antenna control module, AGC control module, data acquisition module and 1553 communication modules realize based on fpga chip design.
As shown in Figure 7, this figure is data acquisition module of the present invention and other model calling figure, as can be seen from the figure data acquisition module is connected with data acquisition circuit with 1553 communication modules, fifo module, AGC control module respectively, Ad_start and Ad_done information is transmitted between described data acquisition module and 1553 communication modules, Ad_start information is used for 1553 communication module notification data acquisition modules and starts AD collection, and Ad_done information is used for data acquisition module and notifies that 1553 communication module AD gather end; The data of collection are transferred to fifo module by described data acquisition module; And AGC lastest imformation is transferred to AGC control module; Transmission of information between described data acquisition module and data acquisition circuit comprises:
Data acquisition module has to the signal of data acquisition circuit:
1, passage gating signal Add [0:3], the channel number of its correspondence is as shown in table 1.
2, H/L is that image data selects signal.As H/L=1, represent that the data read are data of most-significant byte, as H/L=0, represent that the data read are data of least-significant byte
3, R/C reads and conversion switching signal.Represent the data reading data acquisition circuit as R/C=1, represent that as R/C=0 the signal that notification data Acquisition Circuit starts ALT-CH alternate channel becomes digital signal.
4, Ad_cs represents gating Ad conversion chip, makes it in running order.Ad_cs=0, represents conversion chip gating duty, Ad_cs=1, represents that conversion chip is in standby dormant state.
The signal of data acquisition circuit-> data acquisition module has:
RAD_D [0:7] represents the data read, and high-low-position is multiplexing.As H/L=1, this signal is the data of most-significant byte, and as H/L=0, this signal is the data of least-significant byte,
Table 1
| Add[0:3] | Channel number |
| 0000 | 1 |
| 0001 | 2 |
| 0010 | 3 |
| 0011 | 4 |
| 0100 | 5 |
| 0101 | 6 |
| 0110 | 7 |
| 0111 | 8 |
| 1000 | 9 |
| 1001 | 10 |
| 1010 | 11 |
| 1011 | 12 |
| 1100 | 13 |
| 1101 | 14 |
| 1110 | 15 |
| 1111 | 16 |
As shown in Figure 8, this figure is the process flow diagram of data acquisition module work.
When 1553 communication modules are to arranging Ad_start=1 and after this signal detected by data acquisition module, representing that Ad sampling starts, enter the acquisition step of first passage.Data acquisition module gathers from passage 1, data acquisition module is to data acquisition circuit Ad_cs=0, Add [0:3]=0000, R/C=1, at this moment data acquisition circuit is started working, after time delay 5us, data acquisition circuit completes the data conversion of first passage, and data acquisition module BOB(beginning of block) reads the data after conversion.First H/L=1 is set, then reads the data of RAD_D [0:7], deposit the address of most-significant byte, then H/L=0 is set, then read the data of RAD_D [0:7], deposit the address of least-significant byte.Then enter the acquisition step of second channel, similar with above-mentioned steps, just address Add [0:3] is as shown in table 1 according to the different coding of passage.Until after 16 passages all gather, the collecting work of data acquisition module terminates, and to the return signal of a 1553 communication modules Ad_done=1, notifies that 1553 communication module collection period terminates.
As shown in Figure 9, this figure is the constitutional diagram of the collection finite state machine work of data acquisition module.The finite state machine one of this module has 8 states, is respectively: X_idle, X_ad_start, X_delay, X_ad_get1, X_ad_get2, X_ad_save, X_add_judge, X_ad_done.
Wherein,
X_idle is waiting status, in this condition Ad_done=0, Add=0000, count=0; Be in this state when Ad_start=0 always.When 1553 communication modules arrange Ad_start=1, state machine is transformed into X_ad_start state.
X_ad_start starts transition status, in this condition Ad_cs=0, R/C=0, and time initial, count=0, count often add 1 through a clock.Be in this state when count<5 always, be transformed into X_delay state as count=5.
X_delay is delay state, and inner counting variable counting starts counting.Delay_done=0 time initial, arranges Delay_done=1 after counting variable reaches the value of setting.When Delay_done=0, be in this state, when Delay_done=1, state machine is transformed into X_ad_get1 state always.
X_ad_get1 state reads most-significant byte data mode, and Ad_cs=0, R/C=1, H/L=1, count often add 1 through a clock in this condition, are in this state when count<5 always.X_ad_get2 state is transformed into as count=5.
X_ad_get2 state reads least-significant byte data mode, and Ad_cs=0, R/C=1, H/L=0, count often add 1 through a clock in this condition, are in this state when count<5 always.X_ad_save state is transformed into as count=5.
X_ad_save state data is stored into the state of FIFO, in this condition by read data assignment to the data bus Data of FIFO, to the effective impulse of a fifo_wr, write the image data of 16 to FIFO, this image data is jointly obtained by X_ad_get1 state and X_ad_get2 state.Save_done=0 time initial, arranges save_done=1 after write.When save_done=0, be in this state, when save_done=1, state machine is transformed into X_add_judge state always.
X_add_judge state judges whether the channel counts gathered reaches the state of 16 passages, often enters once this state Add counting and add 1.When Add is less than 16, state machine proceeds to X_ad_start state, enters the circulation of next channel acquisition.When Add equals 16, represent that 16 passages all gather complete, now state machine proceeds to X_ad_done state.
X_ad_done state gathers complete state, arranges Ad_done=1 in this condition, notify that 1553 communication module 16 channel acquisition are complete.Time initial, count=0, count often add 1 through a clock.Being in this state when count<5 always, being transformed into X_idle state as count=5, waiting for that 1553 communication modules are by arranging Ad_start=1 to start acquisition state conversion next time.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. based on a control device for the satellite-borne microwave radiometer of FPGA, it is characterized in that, described device comprises:
Data acquisition circuit, for data acquisition;
Data acquisition module, carries out for control data Acquisition Circuit the collection comprising science data and temperature data, and the data collected are transferred to 1553 communication modules;
AGC control module, the instruction that the AGC sent for performing ground is arranged; With
Antenna control module, for the instruction of place of execution surface antenna scan pattern, and reaches 1553 communication modules by the state of antenna and angle value; With
1553 communication modules, for by the command on ground to described data acquisition module, AGC control module and antenna control module, control the setting of the state of satellite-borne microwave radiometer, the scan pattern of antenna and AGC, and the data of data collecting module collected and the antenna condition received and angle value are passed to Ssatellite control center;
Wherein, described data acquisition circuit is: the isolation amplifier of several parallel connections, the output of isolation amplifier are connected with MUX, the output of described MUX is connected with a digital to analog converter, the numerical data that the science data of multiple passage and multi way temperature data is converted to that this data acquisition circuit is used at times gathers for described data acquisition module, the channel selecting that described data acquisition module carries out sometime for controlling MUX.
2. the control device of the satellite-borne microwave radiometer based on FPGA according to claim 1, is characterized in that, AGC control circuit comprises N number of D/A converter, and this AGC control circuit is controlled by described AGC control module;
The numerical value that each passage AGC that described AGC control module receives ground by 1553 communication modules injects, controls the numerical value that described AGC control circuit arranges each passage AGC injection; AGC control module is also according to the image data that described data acquisition module provides, judge that the output voltage of the receiver for radiometer passage gathered is whether within the numerical range preset, if exceed the numerical range that this is predetermined, then automatically adjust the numerical value of AGC, otherwise do not adjust the numerical value of AGC, and specifically press dichotomy adjustment when automatically adjusting AGC numerical value, namely when being greater than certain higher value, the value of AGC is past lowers, toward raising when being less than certain smaller value, described higher value and smaller value obtain according to statistical method;
Wherein, make the output of receiver within the scope of a certain setting by the gain of described AGC control circuit control receiver.
3. the control device of the satellite-borne microwave radiometer based on FPGA according to claim 1, is characterized in that,
The amplifier isolation of the first order of described data acquisition circuit can provide an infinitely-great input impedance;
Data acquisition module is to the coding on a MUX a certain road of gating, it is to be converted that this road signal be strobed enters AD converter etc. by the output port of MUX, then data acquisition module starts the instruction of conversion to AD converter, and voltage signal to be converted for this road is converted to digital signal and outputs to the reading of number bus port waits data acquisition module by AD converter;
Data acquisition module converts the auxiliary datas such as the science data of multiple passage and multi way temperature data to numerical data by control MUX and AD converter timesharing and sends to 1553 communication modules packings.
4. the control method based on the satellite-borne microwave radiometer of FPGA, it is characterized in that, described method receives steering order by 1553B communication module, controls respectively, specifically comprise following steps to data acquisition module, AGC control module and antenna control module:
Step 101) control automatic and non-automatic pattern according to the setting of each channel data of surface instruction control AGC control module and AGC;
Step 102) control data acquisition module collection period and order;
Step 103) scan pattern of antenna control module is set;
Wherein, 1553B communication module also reaches ground the data of AGC control module, data acquisition module and antenna control module and information package, for the real-time monitoring on ground.
5. the control method of the satellite-borne microwave radiometer based on FPGA according to claim 4, is characterized in that, described step 101) be specially:
The numerical value that each passage AGC that AGC control module receives ground by 1553 communication modules injects, this numerical value is converted into the coding needed for AGC control circuit, be specially: the D/A converter first exporting this passage of channel number coding gating that will inject, then the AGC numeric coding changed is outputted to AGC data bus, the voltage that the D/A converter of AGC control circuit converts thereof into simulation exports to the AGC control port of receiver; Described AGC control circuit is the parallel digital to analog converter in some roads, and each digital to analog converter receives the passage gating code and AGC data that AGC control module sends simultaneously.
6. the control method of the satellite-borne microwave radiometer based on FPGA according to claim 4, is characterized in that, described step 102) be specially:
Data acquisition circuit is: the isolation amplifier of several parallel connections, the output of isolation amplifier are connected with MUX, and the output of described MUX is connected with a digital to analog converter; Data acquisition module sends one in MUX described in a coding gating, it is to be converted that this road signal be strobed enters analog to digital converter etc. by the output port of MUX, then data acquisition module starts the instruction of conversion to digital to analog converter, and voltage signal to be converted for this road is converted to digital signal and outputs to the reading of number bus port waits data acquisition module by digital to analog converter; Data acquisition module converts the auxiliary datas such as the science data of multiple passage and multi way temperature data to numerical data by control MUX and digital to analog converter timesharing and is sent to 1553 communication modules packings.
7. the control method of the satellite-borne microwave radiometer based on FPGA according to claim 4, is characterized in that, described step 103) be specially:
Injected the instruction of antenna scanning patterns of change by uphole equipment, arrive Ssatellite control center by satellite wireless communication, then inject 1553 communication modules through 1553 buses;
After 1553 communication modules receive and inject instruction, decomposition obtains antenna scanning pattern, issue antenna control module again, the antenna scanning pattern injected on ground is obtained via antenna control module decoding, enter the cycle period of corresponding pattern, produce corresponding time sequential pulse and export to step motor control antenna rotary scanning;
Antenna control module generates according to the umber of pulse provided the aerial angle information that a real-time antenna rotates to and sends to 1553 communication modules, 1553 communication modules are again aerial angle Value Data, the unified packet forming certain format of temperature data, arrives ground control equipment again via 1553 buses, Ssatellite control center.
8. the control method of the satellite-borne microwave radiometer based on FPGA according to claim 4, it is characterized in that, the collection finite state machine one of described data acquisition module has 8 states, is respectively: X_idle, X_ad_start, X_delay, X_ad_get1, X_ad_get2, X_ad_save, X_add_judge, X_ad_done; Wherein,
X_idle is waiting status, in this condition Ad_done=0, Add=0000, count=0; Be in this state when Ad_start=0 always; When 1553 communication modules arrange Ad_start=1, state machine is transformed into X_ad_start state;
X_ad_start starts transition status, in this condition Ad_cs=0, R/C=0, and time initial, count=0, count often add 1 through a clock, are in this state when count<5 always, are transformed into X_delay state as count=5;
X_delay is delay state, and inner counting variable counting starts counting; Delay_done=0 time initial, arranges Delay_done=1 after counting variable reaches the value of setting; When Delay_done=0, be in this state, when Delay_done=1, state machine is transformed into X_ad_get1 state always;
X_ad_get1 state reads most-significant byte data mode, and Ad_cs=0, R/C=1, H/L=1, count often add 1 through a clock in this condition, are in this state when count<5 always; X_ad_get2 state is transformed into as count=5;
X_ad_get2 state reads least-significant byte data mode, and Ad_cs=0, R/C=1, H/L=0, count often add 1 through a clock in this condition, are in this state when count<5 always; X_ad_save state is transformed into as count=5;
X_ad_save state data is stored into the state of FIFO, in this condition by read data assignment to the data bus Data of FIFO, to the effective impulse of a fifo_wr, write the image data of 16 to FIFO, this image data is jointly obtained by X_ad_get1 state and X_ad_get2 state; Save_done=0 time initial, arranges save_done=1 after write; When save_done=0, be in this state, when save_done=1, state machine is transformed into X_add_judge state always;
X_add_judge state judges whether the channel counts gathered reaches the state of 16 passages, often enters once this state Add counting and add 1; When Add is less than 16, state machine proceeds to X_ad_start state, enters the circulation of next channel acquisition; When Add equals 16, represent that 16 passages all gather complete, now state machine proceeds to X_ad_done state;
X_ad_done state gathers complete state, arranges Ad_done=1 in this condition, notify that 1553 communication module 16 channel acquisition are complete; Time initial, count=0, count often add 1 through a clock; Being in this state when count<5 always, being transformed into X_idle state as count=5, waiting for that 1553 communication modules are by arranging Ad_start=1 to start acquisition state conversion next time;
Wherein, R/C reads and conversion switching signal, Ad_start information is used for 1553 communication module notification data acquisition modules and starts AD collection, Ad_done information is used for data acquisition module and notifies that 1553 communication module AD gather end, Ad_cs represents gating Ad conversion chip, and Add is passage gating signal.
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