CN101866007B - Signal acquisition processing system for atmosphere multiparameter laser radar detection - Google Patents
Signal acquisition processing system for atmosphere multiparameter laser radar detection Download PDFInfo
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Abstract
The invention relates to a signal acquisition processing system for atmosphere multiparameter laser radar detection, which comprises a plurality of integrated photoelectric detecting modules, a multichannel photon counting and control module, a system control and data processing module and a synchronous triggering module, wherein the integrated photoelectric detecting modules are used for receiving and converting an optical signal output by a peripheral equipment receiving optical module into an electrical pulse signal to the multichannel photon counting and control module; the multichannel photon counting and control module is used for respectively counting and preprocessing a multichannel pulse signal in a time sequence and storing and transmitting a result to the system control and data processing module, and meanwhile the photon counting and control module outputs a laser radar control signal and controls a peripheral equipment laser and the integrated photoelectric detecting modules; the system control and data processing module is used for receiving and processing data information transmitted by the multichannel photon counting and control module to obtain an atmospheric parameter; and the synchronous triggering module is used for receiving a laser pulse emitted by the laser and outputting a synchronous triggering signal to the multichannel photon counting and control module. The system has the advantages of high system integrated level, strong electromagnetic interference resistance, high reliability, easy maintenance, and the like.
Description
Technical field
The present invention relates to a kind of signal acquiring processing system of atmosphere multiparameter laser radar detection, belong to laser radar atmospheric exploration field, be applicable to multiparameter atmospheric exploration laser radar system.
Background technology
The atmospheric exploration laser radar be on a large scale, the hi-tech active remote sensing instrument of fast monitored and analyse atmos environment; To physical influences such as the scattering of laser, absorption, delustrings, the backscatter signal of laser is surveyed various atmospheric parameters according to atmosphere through accepting atmosphere.The structure of atmospheric exploration laser radar system commonly used is formed and is shown like Fig. 1, comprising: laser instrument, transmitting optics module, reception optical module, signal acquisition process module.Wherein the signal acquisition process module comprises synchronous triggering module, photodetection module, data acquisition module and system's control and data processing module.The laser instrument emitted laser is injected atmosphere through the transmitting optics module, starts the synchronous triggering module in the time of laser emitting, synchronous triggering module output synchronous triggering signal, and this signal enabling data acquisition module is started working.The laser instrument emitted laser is transmitted absorption and the scattering that receives atmospheric medium in atmosphere; The detection of a target is received the optical module reception to the rear orientation light of laser; By the photodetection module in the signal acquisition process module echo optical signal that receives is carried out opto-electronic conversion again; Electric signal after the opto-electronic conversion is amplified examination, is gathered operations such as storage by data acquisition module, at last data is sent into system's control and data processing and carries out data processing and obtain corresponding atmospheric parameter.
Atmospheric exploration laser radar system comprises: the atmospheric laser radar system that 1. surveys single parameter.The atmospheric exploration laser radar system of present domestic public reported is to survey single parameter mostly, and promptly a cover system can only be surveyed a kind of Atmospheric components or parameter.Its shortcoming is: function singleness, and complex structure, volume is bigger, and cost is very high.2. survey the atmospheric exploration laser radar system of multiparameter.Promptly utilize a cover laser radar system, can realize the multiple parameter of atmospheric sounding simultaneously.Laser instrument in a plurality of detection channels sharing systems, transmitting optics module and reception optical module, and the signal acquisition process module increases corresponding acquisition channel and corresponding processing and control function.The advantage of the atmospheric exploration laser radar system of multiparameter is: can survey a plurality of atmospheric parameters significantly not increasing under system bulk and the condition of cost, improve resource utilization and level of integrated system.Simultaneously, a plurality of parameters of the same target area of atmosphere that obtains can be utilized each other, are beneficial to the new data processing algorithm of exploitation and improve data processing precision.
Because the remote echo optical signal of laser radar is very faint, will realize multi-functional atmospheric exploration simultaneously, therefore accurate detection collection and the processing to the multi-path echo light signal just becomes one of gordian technique of laser radar.Photon counting technique is adopted in the detection collection of faint optical signal at present usually.
General laser radar signal acquiring processing system comprises: photomultiplier, amplifier, discriminator, photon counter and system's control and data processing, show like Fig. 2.Wherein, photomultiplier also need be equipped with high-voltage power supply and refrigerating module usually, the general finished product photon counter that adopts box or cassette outward of photon counter.Photomultiplier carries out opto-electronic conversion to the echo optical signal that receives, and obtains electric signal, and amplifier amplifies this electric signal; And therefrom screen out useful signal by discriminator; Useful signal is transferred to photon counter, photon counter to the useful signal that receives store, operation such as pre-service, and result transferred to system's control and data processing; After the processing through system's control and data processing, obtain corresponding atmospheric parameter at last.
There is a series of deficiency in the laser radar signal acquiring processing system of this kind routine, mainly contains:
1, system bulk is bigger, is difficult for moving, and cost is very high, constitutes by discrete device, and integrated degree is low, and reliability is relatively poor, is difficult to realize automatic operating, has limited the range of application of laser radar, can't realize miniaturization, the practicability of system.
2, photomultiplier generally also need be equipped with high-voltage power supply and cooling system, and price is high, and volume is big.In addition, its output signal must pass through processing such as amplification, examination just can become useful signal.
3, the finished product photon counter costs an arm and a leg, and passage is less, and general 1-2 passage can not satisfy the needs of multifunction laser radar, as buy a plurality of photon counters, and then cost is doubled and redoubled.
4, attainable function of finished product photon counter and performance parameter are fixing, can't change by system requirements.On the one hand; Some function and performance that needs can't provide; Need some control function to realize automatic operating like miniaturization multifunction laser radar, and the finished product photon counter can't provide these specific control function, if increase a control system in addition again; Then reduce level of integrated system, increased system bulk and cost.And on the other hand, the finished product photon counter has a lot of systems and unwanted function, has caused the significant wastage of resource.
Summary of the invention
The objective of the invention is to propose a kind of signal acquiring processing system of atmosphere multiparameter laser radar detection in order to overcome the deficiency that existing laser radar signal acquiring processing system exists.
The objective of the invention is to realize through following technical proposals.
A kind of signal acquiring processing system of atmosphere multiparameter laser radar detection; Comprise: the individual integrated electro detecting module of n (n >=2, n is a positive integer), 1 multi-channel photon counting and control module, 1 system's control and data processing module, 1 synchronous triggering module.
Said integrated electro detecting module is used for receiving the light signal that peripherals receives optical module output, and is converted into electric impulse signal; The quantity of the atmospheric parameter that its quantity n surveys is as required confirmed.
Said multi-channel photon counting comprises photon counting and control module and interface module with control module.
Wherein, The major function of photon counting and control module is: the n road pulse signal to n integrated electro detecting module input is counted respectively chronologically; And carry out pre-service; Then the pretreated result's storage and the system that transfers to are controlled and data processing module, with time photon counting and control module output laser radar control signal, the open and close of control peripheral devices laser instrument and integrated electro detecting module.It comprises: 2 * n counter (counter 1A～counter nA, counter 1B～counter nB), a n accumulator module (accumulator module 1～accumulator module n), a n data memory module (data memory module 1～data memory module n), 1 time-sequence control module, 1 trigger pip control module, 1 trigger pip counting module, a n buffered memory module (buffered memory module 1～buffered memory module n).
The major function of time-sequence control module: give counter, accumulator module, data memory module, trigger pip control module, trigger pip counting module, buffered memory module, interface module transmitting control commands, said control command comprises: start working, quit work, zero clearing, storage, read-write operation;
The major function of trigger pip control module: send " beginning to gather " signal to trigger pip counting module and time-sequence control module behind the synchronous triggering signal of reception synchronous triggering module output;
The major function of trigger pip counting module: " beginning to gather " signal to input is counted, and the result is sent to time-sequence control module;
The major function of counter: counter 1A～counter nA is the electric impulse signal counting to importing in the odd number gate-width time respectively, representes with count value 1A '～count value nA '; Counter 1B～counter nB is the electric impulse signal counting to importing in the even number gate-width time respectively, representes with count value 1B '～count value nB '; And the result is sent to accumulator module 1～accumulator module n respectively.
The major function of data memory module: the sum of the electric impulse signal that data memory module 1 storage pulse collection cycle inside counting device 1A, a counter 1B gather respectively, with total count value 1A " with total count value 1B " expression; The sum of the electric impulse signal that data memory module 2 storages pulse collection cycle inside counting device 2A, a counter 2B gather respectively is with total count value 2A " with total count value 2B " expression; By that analogy, the sum of the electric impulse signal that data memory module n storage pulse collection cycle inside counting device nA, a counter nB gather respectively is with total count value nA " with total count value nB " expression.
The major function of accumulator module: " expression that accumulator module 1 adds up the quantity of the electric impulse signal that a pulse collection cycle inside counting device 1A gathers, with total count value 1A; The quantity of the electric impulse signal of simultaneously pulse collection cycle inside counting device 1B being gathered adds up, and " representes with total count value 1B; And total count value 1A " with total count value 1B " sent to data memory module 1; " expression that accumulator module 2 adds up the quantity of the electric impulse signal that a pulse collection cycle inside counting device 2A gathers, with total count value 2A; The quantity of the electric impulse signal of simultaneously pulse collection cycle inside counting device 2B being gathered is carried out addition, " representes with total count value 2B; And total count value 2A " with total count value 2B " sent to data memory module 2; By that analogy, " expression that accumulator module n adds up the quantity of the electric impulse signal that a pulse collection cycle inside counting device nA gathers, with total count value nA; The quantity of the electric impulse signal of simultaneously pulse collection cycle inside counting device nB being gathered is carried out addition, " representes with total count value nB; And total count value nA " with total count value nB " sent to data memory module n.
The major function of buffered memory module: buffered memory module 1～buffered memory module n stores the data of data memory module 1～data memory module n stored respectively with predefined buffer update frequency K (K is a positive integer).
Said interface module is used to realize communicating by letter between multi-channel photon counting and control module and system's control and the data processing module.
The control of said system comprises with the major function of data processing module: 1. receive the data message that multi-channel photon counting and control module send and handle, obtain atmospheric parameter; 2. set acquisition parameter and transmitting control commands through interface module to time-sequence control module; Said acquisition parameter comprises: range resolution, the detection height number of plies, acquisition pulse are counted M (M is a positive integer), buffer update frequency K; Said control command is the control command that control peripheral devices laser instrument and integrated electro detecting module open and close.
Said synchronous triggering module functions is to receive the pulse of laser instrument emitted laser, output synchronous triggering signal to trigger pip control module.
Annexation is:
Integrated electro detecting module i (0＜i≤n, i are positive integer) is connected with counter iA, counter iB, time-sequence control module respectively; Counter iA is connected with integrated electro detecting module i, accumulator module i, time-sequence control module respectively; Counter iB is connected with integrated electro detecting module i, accumulator module i, time-sequence control module respectively; Accumulator module i is connected with counter iA, counter iB, data memory module i, time-sequence control module respectively; Data memory module i is connected with accumulator module i, buffered memory module i, time-sequence control module respectively; Buffered memory module i is connected with data memory module i, interface module, time-sequence control module respectively; Time-sequence control module is connected with integrated electro detecting module i, counter iA, counter iB, accumulator module i, data memory module i, buffered memory module i, trigger pip control module, trigger pip counting module, interface module, peripherals laser instrument respectively; The synchronous triggering module is connected with trigger pip control module, peripherals laser instrument respectively; The trigger pip control module is connected with synchronous triggering module, trigger pip counting module, time-sequence control module respectively; The trigger pip counting module is connected with trigger pip control module, time-sequence control module respectively; Interface module is connected with data processing module with buffered memory module i, time-sequence control module, system's control respectively; System's control is connected with interface module with data processing module.
Its course of work is:
The 1st step: system's control is set acquisition parameter through interface module to time-sequence control module with data processing module; Said acquisition parameter comprises: range resolution, the detection height number of plies, acquisition pulse are counted M (M is a positive integer), buffer update frequency K;
The 2nd step: system's control sends to time-sequence control module through interface module with control command with data processing module; Said control command is the control command of control laser instrument and the open and close of integrated electro detecting module;
The 3rd step: time-sequence control module control laser instrument and integrated electro detecting module are started working; Laser instrument emission laser pulse; The integrated electro detecting module receives the echo optical signal that receives optical module output in the peripherals; And after it is carried out opto-electronic conversion, export electric impulse signal to photon counting and control module;
The 4th step: laser instrument emitted laser trigger action synchronous triggering module output synchronous triggering signal, and export the trigger pip control module to;
The 5th step: after the trigger pip control module received synchronous triggering signal, whether the work of once counting before the judgement was accomplished; If accomplish, then send " beginning to gather " signal to trigger pip counting module and time-sequence control module, begin a pulse collection cycle; Otherwise, ignore this synchronous triggering signal;
The 6th step: after the trigger pip counting module received " beginning to gather " signal, " beginning to gather " signal to input under the control of time-sequence control module was counted, and its number is represented with m (m is a positive integer), and this result is sent to time-sequence control module; The quantity m of " beginning to gather " signal of trigger pip counting module record represents the pulse collection periodicity.
The 7th step: after time-sequence control module receives pulse collection periodicity m; It is sent to system's control and data processing module through interface module; And whether the value of judging m-1 is counted M with the acquisition pulse that the 1st step was provided with and is equated; If equate, then time-sequence control module sends silence signal for counter, accumulator module, data memory module, trigger pip control module, trigger pip counting module, address generating module, buffered memory module, finishes this detection; Judge remainder that m/K obtains whether be zero or the value of m whether count M and equate with the acquisition pulse that the 1st step was provided with; If the remainder that m/K obtains be zero or the value of m count M with the acquisition pulse of the 1st step setting and equate; Buffer update is set is masked as 1, otherwise, buffer update is set is masked as 0.
The 8th step: on the basis of the 5th step operation; After time-sequence control module receives " beginning to gather " signal; Produce counting gate-width time signal according to the range resolution of setting in the 1st step; Odd number gate-width time inside counting device 1A～counter nA at this signal counts the electric impulse signal of input, and time-sequence control module enabling counting device 1B～counter nB is to the electric impulse signal counting of input in the even number gate-width time; And counter 1A～counter nA; Counter 1B～full gate-width of counter nB meter is after the time; Count value 1A '～count value nA ' or count value 1B '～count value nB ' are sent to accumulator module 1～accumulator module n respectively; And with counter O reset; Simultaneously time-sequence control module sends data memory module 1～data memory module n that reads instruction, and data memory module 1～data memory module n reads instruction respectively the total count value 1A "～total count value nA " or the total count value 1B～total count value nB of storage according to this, and " send to accumulator module 1～accumulator module n, accumulator module i (0＜i≤n; i is a positive integer) stores data memory module i into after count value iA ', total count value iA " or count value iB ', total count value iB " are added up again.If this moment, buffer update was masked as 1, the data of data memory module i are sent to buffered memory module i.After each storage, the quantity of statistics gate-width time also judges whether it equals to survey the height number of plies; If equate, then accomplish a pulse collection cycle, turned back to for the 5th step.
The 9th step: system's control is read total count value 1A "～total count value nA ", total count value 1B "～total count value nB " with data processing module from buffering memory module 1～buffered memory module n, and handles, and can obtain the atmospheric parameter that need survey.
Beneficial effect
The present invention program compared with present technology has following advantage:
1. level of integrated system is high, and anti-electromagnetic interference capability is strong, and reliability is high, is easy to safeguard, and effectively reduces system complexity;
2. volume is little, and cost is low, has realized miniaturization, the practicability of system, is convenient to the outfield and uses;
3. multi pass acquisition counting, pre-service and modules such as control, interface are integrated, flexible function is changeable, and control is convenient, realizes the automatic operating of laser radar.
4. being employed in the sequential control aspect has the field programmable logic device of significant advantage (FPGA), adds unique time sequence control logic, and acquisition precision is improved, and detection time shortens, and can adapt to the interface mode of various different transmission speeds.
Description of drawings
Fig. 1 is the structure composition diagram of the atmospheric exploration laser radar system commonly used of prior art;
Fig. 2 is the general laser radar signal acquiring processing system composition diagram of prior art;
Fig. 3 is the structure composition diagram of the present invention about a kind of embodiment of signal acquiring processing system of atmosphere multiparameter laser radar detection.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Among the embodiment; Providing can the atmospheric sounding temperature and the signal acquiring processing system of aerocolloidal multiparameter laser radar; Its composition is as shown in Figure 3, comprising: 3 integrated electro detecting modules, 1 multi-channel photon counting and control module, 1 system's control and data processing module, 1 synchronous triggering module.Wherein, the multi-channel photon counting comprises photon counting and control module and interface module with control module.Photon counting and control module comprise: 6 counters (counter 1A～counter 3A, counter 1B～counter 3B), 3 accumulator module (accumulator module 1～accumulator module 3), 3 data memory modules (data memory module 1～data memory module 3), 1 time-sequence control module, 1 trigger pip control module, 1 trigger pip counting module, 3 buffered memory module (buffered memory module 1～buffered memory module 3).
Its annexation is:
Integrated electro detecting module i (0＜i≤3, i is a positive integer) is connected with counter iA, counter iB, time-sequence control module respectively; Counter iA is connected with integrated electro detecting module i, accumulator module i, time-sequence control module respectively; Counter iB is connected with integrated electro detecting module i, accumulator module i, time-sequence control module respectively; Accumulator module i is connected with counter iA, counter iB, data memory module i, time-sequence control module respectively; Data memory module i is connected with accumulator module i, buffered memory module i, time-sequence control module respectively; Buffered memory module i is connected with data memory module i, interface module, time-sequence control module respectively; Time-sequence control module is connected with integrated electro detecting module i, counter iA, counter iB, accumulator module i, data memory module i, buffered memory module i, trigger pip control module, trigger pip counting module, interface module, peripherals laser instrument respectively; The synchronous triggering module is connected with trigger pip control module, peripherals laser instrument respectively; The trigger pip control module is connected with synchronous triggering module, trigger pip counting module, time-sequence control module respectively; The trigger pip counting module is connected with trigger pip control module, time-sequence control module respectively; Interface module is connected with data processing module with buffered memory module i, time-sequence control module, system's control respectively; System's control is connected with interface module with data processing module.
A kind of CPM-Channel Photomultiplier MP944 that specifically is embodied as the production of the German PerkinEImer of employing company of integrated electro detecting module.MP944 is small-sized Module part; Need not to be equipped with in addition treatment circuits such as high-voltage power supply and refrigerating module and follow-up amplification, examination; Outside 5V power supply can directly convert the light signal of input into the electric impulse signal output of Transistor-Transistor Logic level, thus have simple in structure, volume is little, easy to use, integrated level is high, low cost and other advantages.
A kind of field programmable logic device (FPGA) EP3C25Q240C8 that specifically is embodied as employing altera corp of photon counting in multi-channel photon counting and the control module and control module; This chip comprises 24624 LE; The in-line memory of 596kB; 4 independent PLL, external clock select the active crystal oscillator of 40MHz for use.6 required counters (counter 1A～counter 3A, counter 1B～counter 3B), 3 accumulator module (accumulator module 1～accumulator module 3), 3 data memory modules (data memory module 1～data memory module 3), 1 time-sequence control module, 1 trigger pip control module, 1 trigger pip counting module, 3 buffered memory module (buffered memory module 1～buffered memory module 3) all in the inner realization of FPGA, make system have higher integrated level.
Interface module in multi-channel photon counting and the control module a kind of specifically is embodied as the pci interface mode that adopts.Can select the PCI9054 bridging chip of U.S. PLX company for use, these chip accord with PCI Specification 2.2 versions.Adopt the C module working method of PCI9054; It is non-multiplexing that local bus is designed to data address; The local control logic signal of design PCI9054 among the master chip FPGA in multi-channel photon counting and control module realizes that buffer register and command status register are through the two-way communication between PCI9054 and system's control and the data processing module.
System's control realizes for adopting the VC++ programming with a kind of embodiment of data processing module, realizes the fully control of multi-channel photon counting with control module through driving.
A kind of embodiment of synchronous triggering module is for adopting the high speed PIN photodiode.Photodiode receives the laser pulse generation synchronous triggering signal that laser instrument sends.
Its course of work:
The 1st step: system's control is set acquisition parameter through interface module to time-sequence control module with data processing module; Said acquisition parameter comprises: range resolution, the detection height number of plies, acquisition pulse are counted M (M is a positive integer), buffer update frequency K;
The 2nd step: system's control sends to time-sequence control module through interface module with control command with data processing module; Said control command is the control command of control laser instrument and integrated electro detecting module MP944 open and close;
The 3rd step: time-sequence control module control laser instrument and integrated electro detecting module MP944 start working; Laser instrument emission laser pulse; Integrated electro detecting module MP944 receives atmospheric molecule height quantum number rotary Raman (Raman) spectrum two-way echoed signal and gasoloid rice (Mie) scattering one tunnel echoed signal that receives optical module output in the peripherals; And after respectively it being carried out opto-electronic conversion, export electric impulse signal to photon counting and control module;
The 4th step: laser instrument emitted laser trigger action synchronous triggering module output synchronous triggering signal, and export the trigger pip control module to;
The 5th step: after the trigger pip control module received synchronous triggering signal, whether the work of once counting before the judgement was accomplished; If accomplish, then send " beginning to gather " signal to trigger pip counting module and time-sequence control module, begin a pulse collection cycle; Otherwise, ignore this synchronous triggering signal;
The 6th step: behind " beginning to gather " signal that the trigger pip counting module receives; " beginning to gather " signal to input under the control of time-sequence control module is counted; Its number is represented with m (m is a positive integer), and this result is sent to time-sequence control module; The quantity m of " beginning to gather " signal of trigger pip counting module record represents the pulse collection periodicity.
The 7th step: after time-sequence control module receives pulse collection periodicity m; It is sent to system's control and data processing module through interface module; And whether the value of judging m-1 is counted M with the acquisition pulse that the 1st step was provided with and is equated; If equate, then time-sequence control module sends silence signal for counter, accumulator module, data memory module, trigger pip control module, trigger pip counting module, address generating module, buffered memory module, finishes this detection; Judge remainder that m/K obtains whether be zero or the value of m whether count M and equate with the acquisition pulse that the 1st step was provided with; If the remainder that m/K obtains be zero or the value of m count M with the acquisition pulse of the 1st step setting and equate; Buffer update is set is masked as 1, otherwise, buffer update is set is masked as 0.
The 8th step: on the basis of the 5th step operation; After time-sequence control module receives " beginning to gather " signal; Produce counting gate-width time signal according to the range resolution of setting in the 1st step; Odd number gate-width time inside counting device 1A～counter 3A at this signal counts the electric impulse signal of input, and time-sequence control module enabling counting device 1B～counter 3B is to the electric impulse signal counting of input in the even number gate-width time; And counter 1A～counter 3A; Counter 1B～full gate-width of counter 3B meter is after the time; "～count value 3B ' is sent to respectively accumulator module 1～accumulator module 3 respectively; and with this counter O reset; time-sequence control module sends the data memory module 1～data memory module 3 that reads instruction simultaneously, and data memory module 1～data memory module 3 sends to accumulator module 1～accumulator module 3 according to total count value 1A "～total count value 3A " or the total count value 1B "～total count value 3B " that this reads instruction respectively storage, and accumulator module i (0＜i≤3; i is a positive integer) " after adding up, stores count value iA " ', total count value iA " or count value iB ', total count value iB into data memory module i again with count value 1A '～count value 3A ' or count value 1B.If this moment, buffer update was masked as 1, the data of data memory module i are sent to buffered memory module i.After each storage, the quantity of statistics gate-width time also judges whether it equals to survey the height number of plies; If equate, then accomplish a pulse collection cycle, turned back to for the 5th step.
The 9th step: system's control is read total count value 1A "～total count value 3A ", total count value 1B "～total count value 3B " with data processing module from buffering memory module 1～buffered memory module 3; And handle, the atmospheric temperature and the gasoloid that can obtain needing to survey distribute.
The above only is a preferred implementation of the present invention; Should be understood that; For those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some improvement; Perhaps part technical characterictic wherein is equal to replacement, these improvement and replacement also should be regarded as protection scope of the present invention.
Claims (2)
1. the signal acquiring processing system of an atmosphere multiparameter laser radar detection is characterized in that: comprising: n integrated electro detecting module, 1 multi-channel photon counting and control module, 1 system's control and data processing module, 1 synchronous triggering module; Wherein: n >=2, n is a positive integer;
Said integrated electro detecting module is used for receiving the light signal that peripherals receives optical module output, and is converted into electric impulse signal; The quantity of the atmospheric parameter that its quantity n surveys is as required confirmed;
Said multi-channel photon counting comprises photon counting and control module and interface module with control module;
Wherein, The major function of photon counting and control module is: the n road pulse signal to n integrated electro detecting module input is counted respectively chronologically; And carry out pre-service; Then the pretreated result's storage and the system that transfers to are controlled and data processing module, with time photon counting and control module output laser radar control signal, the open and close of control peripheral devices laser instrument and integrated electro detecting module; It comprises: 2 * n counter: counter 1A～counter nA, counter 1B～counter nB; N accumulator module: accumulator module 1～accumulator module n; N data memory module: data memory module 1～data memory module n; 1 time-sequence control module; 1 trigger pip control module; 1 trigger pip counting module; N buffered memory module: buffered memory module 1～buffered memory module n;
The major function of time-sequence control module: give counter, accumulator module, data memory module, trigger pip control module, trigger pip counting module, buffered memory module, interface module transmitting control commands, said control command comprises: start working, quit work, zero clearing, storage, read-write operation;
The major function of trigger pip control module: send " beginning to gather " signal to trigger pip counting module and time-sequence control module behind the synchronous triggering signal of reception synchronous triggering module output;
The major function of trigger pip counting module: " beginning to gather " signal to input is counted, and the result is sent to time-sequence control module;
The major function of counter: counter 1A～counter nA is the electric impulse signal counting to importing in the odd number gate-width time respectively, representes with count value 1A '～count value nA '; Counter 1B～counter nB is the electric impulse signal counting to importing in the even number gate-width time respectively, representes with count value 1B '～count value nB '; And the result is sent to accumulator module 1～accumulator module n respectively;
The major function of data memory module: the sum of the electric impulse signal that data memory module 1 storage pulse collection cycle inside counting device 1A, a counter 1B gather respectively, with total count value 1A " with total count value 1B " expression; The sum of the electric impulse signal that data memory module 2 storages pulse collection cycle inside counting device 2A, a counter 2B gather respectively is with total count value 2A " with total count value 2B " expression; By that analogy, the sum of the electric impulse signal that data memory module n storage pulse collection cycle inside counting device nA, a counter nB gather respectively is with total count value nA " with total count value nB " expression;
The major function of accumulator module: " expression that accumulator module 1 adds up the quantity of the electric impulse signal that a pulse collection cycle inside counting device 1A gathers, with total count value 1A; The quantity of the electric impulse signal of simultaneously pulse collection cycle inside counting device 1B being gathered adds up, and " representes with total count value 1B; And total count value 1A " with total count value 1B " sent to data memory module 1; " expression that accumulator module 2 adds up the quantity of the electric impulse signal that a pulse collection cycle inside counting device 2A gathers, with total count value 2A; The quantity of the electric impulse signal of simultaneously pulse collection cycle inside counting device 2B being gathered is carried out addition, " representes with total count value 2B; And total count value 2A " with total count value 2B " sent to data memory module 2; By that analogy, " expression that accumulator module n adds up the quantity of the electric impulse signal that a pulse collection cycle inside counting device nA gathers, with total count value nA; The quantity of the electric impulse signal of simultaneously pulse collection cycle inside counting device nB being gathered is carried out addition, " representes with total count value nB; And total count value nA " with total count value nB " sent to data memory module n;
The major function of buffered memory module: buffered memory module 1～buffered memory module n stores the data of data memory module 1～data memory module n stored respectively with predefined buffer update frequency K; Wherein, K is a positive integer;
Said interface module is used to realize communicating by letter between multi-channel photon counting and control module and system's control and the data processing module;
The control of said system comprises with the major function of data processing module: 1. receive the data message that multi-channel photon counting and control module send and handle, obtain atmospheric parameter; 2. set acquisition parameter and transmitting control commands through interface module to time-sequence control module; Said acquisition parameter comprises: range resolution, the detection height number of plies, acquisition pulse are counted M, and M is positive integer, buffer update frequency K; Said control command is the control command that control peripheral devices laser instrument and integrated electro detecting module open and close;
Said synchronous triggering module functions is to receive the pulse of laser instrument emitted laser, output synchronous triggering signal to trigger pip control module;
Annexation is:
Integrated electro detecting module i, 0＜i≤n, i are positive integer, are connected with counter iA, counter iB, time-sequence control module respectively; Counter iA is connected with integrated electro detecting module i, accumulator module i, time-sequence control module respectively; Counter iB is connected with integrated electro detecting module i, accumulator module i, time-sequence control module respectively; Accumulator module i is connected with counter iA, counter iB, data memory module i, time-sequence control module respectively; Data memory module i is connected with accumulator module i, buffered memory module i, time-sequence control module respectively; Buffered memory module i is connected with data memory module i, interface module, time-sequence control module respectively; Time-sequence control module is connected with integrated electro detecting module i, counter iA, counter iB, accumulator module i, data memory module i, buffered memory module i, trigger pip control module, trigger pip counting module, interface module, peripherals laser instrument respectively; The synchronous triggering module is connected with trigger pip control module, peripherals laser instrument respectively; The trigger pip control module is connected with synchronous triggering module, trigger pip counting module, time-sequence control module respectively; The trigger pip counting module is connected with trigger pip control module, time-sequence control module respectively; Interface module is connected with data processing module with buffered memory module i, time-sequence control module, system's control respectively; System's control is connected with interface module with data processing module.
2. the signal acquiring processing system of a kind of atmosphere multiparameter laser radar detection as claimed in claim 1, it is characterized in that: its course of work is:
The 1st step: system's control is set acquisition parameter through interface module to time-sequence control module with data processing module; Said acquisition parameter comprises: range resolution, the detection height number of plies, acquisition pulse are counted M, buffer update frequency K; Wherein, M is a positive integer;
The 2nd step: system's control sends to time-sequence control module through interface module with control command with data processing module; Said control command is the control command of control laser instrument and the open and close of integrated electro detecting module;
The 3rd step: time-sequence control module control laser instrument and integrated electro detecting module are started working; Laser instrument emission laser pulse; The integrated electro detecting module receives the echo optical signal that receives optical module output in the peripherals; And after it is carried out opto-electronic conversion, export electric impulse signal to photon counting and control module;
The 4th step: laser instrument emitted laser trigger action synchronous triggering module output synchronous triggering signal, and export the trigger pip control module to;
The 5th step: after the trigger pip control module received synchronous triggering signal, whether the work of once counting before the judgement was accomplished; If accomplish, then send " beginning to gather " signal to trigger pip counting module and time-sequence control module, begin a pulse collection cycle; Otherwise, ignore this synchronous triggering signal;
The 6th step: after the trigger pip counting module receives " beginning to gather " signal; " begin gather " signal to input under the control of time-sequence control module is counted, and its number representes with m, wherein; M is a positive integer, and this result is sent to time-sequence control module; The quantity m of " beginning to gather " signal of trigger pip counting module record represents the pulse collection periodicity;
The 7th step: after time-sequence control module receives pulse collection periodicity m; It is sent to system's control and data processing module through interface module; And whether the value of judging m-1 is counted M with the acquisition pulse that the 1st step was provided with and is equated; If equate, then time-sequence control module sends silence signal for counter, accumulator module, data memory module, trigger pip control module, trigger pip counting module, address generating module, buffered memory module, finishes this detection; Judge remainder that m/K obtains whether be zero or the value of m whether count M and equate with the acquisition pulse that the 1st step was provided with; If the remainder that m/K obtains be zero or the value of m count M with the acquisition pulse of the 1st step setting and equate; Buffer update is set is masked as 1, otherwise, buffer update is set is masked as 0;
The 8th step: on the basis of the 5th step operation; After time-sequence control module receives " beginning to gather " signal; Produce counting gate-width time signal according to the range resolution of setting in the 1st step; Odd number gate-width time inside counting device 1A～counter nA at this signal counts the electric impulse signal of input, and time-sequence control module enabling counting device 1B～counter nB is to the electric impulse signal counting of input in the even number gate-width time; And counter 1A～counter nA; Counter 1B～full gate-width of counter nB meter is after the time; Count value 1A '～count value nA ' or count value 1B '～count value nB ' are sent to accumulator module 1～accumulator module n respectively; And with counter O reset; Time-sequence control module sends data memory module 1～data memory module n that reads instruction simultaneously; Data memory module 1～data memory module n sends to accumulator module 1～accumulator module n according to total count value 1A "～total count value nA " or the total count value 1B "～total count value nB " that this reads instruction respectively storage, and accumulator module i stores data memory module i into after count value iA ', total count value iA " or count value iB ', total count value iB " are added up again; If this moment, buffer update was masked as 1, the data of data memory module i are sent to buffered memory module i; After each storage, the quantity of statistics gate-width time also judges whether it equals to survey the height number of plies; If equate, then accomplish a pulse collection cycle, turned back to for the 5th step;
The 9th step: system's control is read total count value 1A "～total count value nA ", total count value 1B "～total count value nB " with data processing module from buffering memory module 1～buffered memory module n, and handles, and can obtain the atmospheric parameter that need survey.
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| CN102937586B (en) * | 2012-11-01 | 2015-01-14 | 南京信息工程大学 | Laser radar based water-in-cloud raman scattering full-spectrum measurement system and method thereof |
| CN105093205A (en) * | 2014-04-15 | 2015-11-25 | 北京艾沃思科技有限公司 | Laser radar device used for aerosol monitoring |
| CN105182361A (en) * | 2015-08-06 | 2015-12-23 | 哈尔滨工业大学 | Composite-modulation-pulse-code-based 4D imaging photon counting laser radar |
| CN108401003B (en) * | 2017-02-08 | 2021-01-22 | 北京百度网讯科技有限公司 | Radar data synchronization method, device, equipment and computer storage medium |
| CN107422337A (en) * | 2017-08-23 | 2017-12-01 | 池州睿成微电子有限公司 | A kind of Atmospheric Survey laser radar |
| CN108957199A (en) * | 2018-08-30 | 2018-12-07 | 国家电网有限公司 | A kind of synchronous triggering device and triggering method for the acquisition of electro-magnetic transient data |
| CN109375532A (en) * | 2018-09-10 | 2019-02-22 | 中国科学院上海应用物理研究所 | A kind of signal acquisition process device and its more data volume read methods |
| CN110109148B (en) * | 2019-04-09 | 2021-02-09 | 北京遥测技术研究所 | Laser radar multichannel photon counting and simulation detection device and method |
| CN111125974B (en) * | 2019-12-26 | 2022-12-27 | 中国电子科技集团公司第二十研究所 | Timing sequence modular design method and system based on radar system |
| CN112181273B (en) * | 2020-10-13 | 2022-11-01 | 恒玄科技(上海)股份有限公司 | Data synchronization system and audio device |
| CN112835053B (en) * | 2020-12-31 | 2023-02-28 | 北京一径科技有限公司 | Laser radar synchronization method and device, electronic equipment and storage medium |
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