CN103472442B - Multichannel laser echo signal simulation system - Google Patents
Multichannel laser echo signal simulation system Download PDFInfo
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- CN103472442B CN103472442B CN201310434887.0A CN201310434887A CN103472442B CN 103472442 B CN103472442 B CN 103472442B CN 201310434887 A CN201310434887 A CN 201310434887A CN 103472442 B CN103472442 B CN 103472442B
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Abstract
The invention provides a multichannel laser echo signal simulation system, belongs to the technical field of photoelectric detection and relates to a multichannel laser echo simulation signal achieving method. The multichannel laser echo signal simulation system is settable in channel output signal amplitude, signal rise time and inter-channel delay. The technical scheme for solving the technical problem is that voltage signals with rising indexes are produced through RC charge-discharge circuits, and then a pulse signal is obtained through capacity coupling so as to simulate a laser echo signal. An RC charge circuit power supply is a variable power source, and the output signal amplitude is changed by changing a charging voltage value. The output signal rise time is set by changing a resistance value, or a capacitance value or the resistance value and the capacitance value. The delay of output signals of channels is controlled by controlling the delay of RC charge-discharge circuit electronic control switch signals corresponding to the output signals. The multichannel laser echo signal simulation system can safely finish electronic debugging of a laser imaging system in a laboratory with low cost.
Description
Technical field
The present invention relates to technical field of photoelectric detection, be specifically related to multichannel laser echo signal simulation system.
Background technology
Laser imaging system is used for doing Laser active illuminated imaging and range observation on a surface target, produces the angle-angle-distance image containing target and background and target strength image.Compared to imaging and passive imaging mode, laser 3D imaging anti-electromagnetic interference capability and anti-stealth capabilities by force, can identify Stealthy Target; There is higher distance, angle, velocity resolution; Security is higher.According to use type photodetector, laser imaging system can be divided into single-point detector laser imaging system and planar array detector laser imaging system.Single-point detector laser imaging system obtains the three-dimensional information of target area by scanning, and efficiency is lower, but its structure is simple; Comparatively speaking, planar array detector laser imaging system efficiency is higher, by selecting suitable planar array detector, can the three-dimensional information of disposable acquisition target area, but its complex structure.
Laser imaging system operating distance and laser output power closely bound up: operating distance is far away, requires that laser output power is larger.Laser output power is larger, and to human body, especially eye injury is larger.Therefore, when testing, experimenter needs to wear cuticula mirror usually.In the laser imaging system electronics debug phase, if electronic system is direct and laser instrument carries out uniting and adjustment, then can increase the possibility that human body damages.Common way is, adopts specialized equipment simulated laser echoed signal as the input signal of electronic system in laboratory, while guarantee electronics commissioning staff personal safety, each subsystem can be made synchronously to carry out, shorten the equipment R&D cycle.
Before the present invention, usually adopt arbitrarily signal generating device, by programming, signal output waveform is set, with simulated laser echoed signal.Market has the arbitrarily signal generating device of Multiple Type available, and its performance index are higher, but its price is very high, adds laser imaging system R&D costs undoubtedly.Current alternative arbitrarily signal generating device mostly is two passages or four-way, can meet single-point detector laser imaging system electronics commissioning requirements.For the debugging of planar array detector laser imaging system electronic system, a kind of method is debugged several times planar array detector hyperchannel, and each debugging two passages or four-way, this method increase the system debug cycle; Another kind method is the port number according to planar array detector, buys the series connection of multiple stage arbitrarily signal generating device and uses, and in view of the price of separate unit arbitrarily signal generating device is very high, multiple stage series connection uses the R&D costs that greatly can increase laser imaging system undoubtedly.
Summary of the invention
The present invention can only simulate for two passages or four-way for solving existing laser echo signal simulation system, adopt arbitrarily signal generating device to there is the high problem of cost, the multichannel laser echo simulation system that a kind of each multi-channel output signal amplitude, signal elevating time and interchannel time delay can be arranged is provided.
Multichannel laser echo signal simulation system, comprises controller, multichannel variable power supply module, multichannel RC charge-discharge circuit module and capacitive coupling output port; Described controller controls multichannel variable power supply module for multichannel RC charge-discharge circuit module provides RC charging voltage, and changes the output signal amplitude of each passage by changing multichannel variable power supply module Zhong Ge road output voltage correspondence; Controller changes the rise time of corresponding output signal by changing resistance value, capacitance or resistance value in multichannel RC charge-discharge circuit module and capacitance, and controls the delay between each multi-channel output signal by the time delay between the gauge tap signal of each passage of controlling multichannel RC charge-discharge circuit module; Described multichannel RC charge-discharge circuit module output signal obtains AC compounent through capacitive coupling, and exports through capacitive coupling output port, realizes multichannel analog laser echo signal.
Beneficial effect of the present invention: adopt multichannel laser echo signal simulation system of the present invention, the multi-path laser analogue echoes signal that time delay between each channel signal amplitude, signal elevating time and each passage can be arranged can be obtained, complete the debugging of laser imaging system electronics at laboratory safety at lower cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of multichannel laser echo signal simulation system of the present invention;
Fig. 2 realizes variable power supply modular structure schematic diagram for adopting digital to analog converter;
Fig. 3 realizes variable power supply modular structure schematic diagram for adopting adjustable voltage stabilizer and digital potentiometer;
Fig. 4 realizes RC charge-discharge circuit structural representation for adopting digital potentiometer and fixing capacitance electric capacity;
Fig. 5 realizes RC charge-discharge circuit structural representation for adopting fixed resistance value resistance and capacitor array and analog switch array;
Fig. 6 realizes RC charge-discharge circuit structural representation for adopting digital potentiometer and capacitor array and analog switch array.
In figure: 1, controller, 2, multichannel variable power supply module, 3, multichannel RC charge-discharge circuit module, 4, display system, 5, capacitive coupling output port, 6, keyboard, 7, power module, 8, single channel variable power supply module, 9, single channel RC charge-discharge circuit module, 10, digital to analog converter, 11, adjustable voltage stabilizer, 12, the first digital potentiometer, the 13, second digital potentiometer, 14, fixing capacitance electric capacity, 15, RC charge and discharge control on-off circuit, 16, fixed resistance value resistance, 17, capacitor array, 18, analog switch array.
Embodiment
Embodiment one, composition graphs 1, Fig. 2 and Fig. 4 illustrate present embodiment, multichannel laser echo signal simulation system, the voltage signal of index rising is produced by RC charge-discharge circuit, pulse signal is obtained by capacitive coupling, with simulated laser echoed signal, RC charge-discharge circuit module is variable power supply, arranges the rise time of output signal by changing resistance value or capacitance or resistance value and capacitance; The delay between each multi-channel output signal is controlled by the delay controlled between each output signal corresponding RC charge-discharge circuit electric-controlled switch signal.Comprise controller 1, multichannel variable power supply module 2, multichannel RC charge-discharge circuit module 3, display system 4, capacitive coupling output port 5, keyboard 6 and power module 7.The multichannel RC charge-discharge circuit module 3 that multichannel variable power supply module 2 is respectively its correspondence provides RC charging voltage, changes multichannel variable power supply module each road output voltage and can change its corresponding output signal amplitude; By changing the resistance value in multichannel RC charging circuit module 3, or capacitance, or resistance value and capacitance change its corresponding output signal rise time; The delay between each multi-channel output signal is controlled by the time delay controlled between each passage gauge tap signal of multichannel RC charge-discharge circuit module 3; Multichannel RC charge-discharge circuit module 3 outputs signal and obtains AC compounent through capacitive coupling, and exports through capacitive coupling output port 5, with simulated laser echoed signal; The information such as the delay between each multi-channel output signal amplitude, rise time, each passage are set by keyboard 6.Meanwhile, keyboard 6 can realize carrying out charge and discharge control to all or single RC charge-discharge circuit 9; All configuration informations can be sent into display system and show; Power module 7 provides required reference voltage for whole system; The whole system course of work is by controller 1 Collaborative Control.
The microprocessor such as FPGA or DSP or ARM selected by controller 1 described in present embodiment.
Multichannel variable power supply module 2 described in present embodiment comprises multiple single channel variable power supply module 8, described single channel variable power supply model choice digital to analog converter 10, composition graphs 2, writes different numerical value by controller 1 to digital to analog converter 10 and arranges its corresponding multichannel variable power supply module 2 output voltage.Multichannel variable power supply module 2 output voltage is as the charging voltage of multichannel RC charge-discharge circuit module 3, and the difference of multichannel variable power supply module 2 output voltage makes its corresponding output signal amplitude different.
Multichannel RC charge-discharge circuit module 3 described in present embodiment comprises multiple single channel RC charge-discharge circuit module 9, resistance selection second digital potentiometer 13 in described single channel RC charge-discharge circuit module 9, capacitance selection fixes capacitance electric capacity 14, composition graphs 4, write to the second digital potentiometer 13 resistance that different numerical value obtains different resistance by controller 1, thus control the rise time of its corresponding single channel RC charge-discharge circuit module 9 output signal.Each single channel RC charge-discharge circuit module 9 in multichannel RC charge-discharge circuit module 3 all comprises RC charge and discharge control on-off circuit 15, and it is in charged state or discharge condition with deciding RC charge-discharge circuit, and switch controlling signal is provided by controller 1.The delay between each multi-channel output signal is controlled by the time delay controlled between each passage gauge tap signal of multichannel RC charge-discharge circuit module 3.RC charge and discharge control on-off circuit 15 can be realized by the triode or analog switch being operated on off state.
Display system 4 described in present embodiment can adopt LCD MODULE or multiple seven segment digital tubes to realize, and all configuration informations can be sent into display system 4 and show.
Embodiment two, composition graphs 5 illustrate present embodiment, present embodiment and embodiment one are unlike the resistance selection fixed resistance value resistance 16 in the single channel RC charge-discharge circuit module 9 in described multichannel RC charge-discharge circuit module 3, capacitance selection capacitor array 17 and analog switch array 18 realize, and write different numerical value whether determine corresponding analog switch conducting by controller 1 to analog switch array 18.The corresponding electric capacity of each analog switch, to control corresponding electric capacity whether place in circuit, finally obtains the equivalent capacity of different capacitance, and then controls the rise time of its corresponding single channel RC charge-discharge circuit module 9 output signal.Other is identical with embodiment one.
Embodiment three, composition graphs 6 illustrate present embodiment, present embodiment and embodiment one are unlike resistance selection second digital potentiometer 13 in the single channel RC charge-discharge circuit module 9 in described multichannel RC charge-discharge circuit module 3, capacitance selection capacitor array 17 and analog switch array 18 realize, and write the resistance that different numerical value obtains different resistance by controller 1 to the second digital potentiometer 13; Meanwhile, write different numerical value by controller 1 to analog switch array 18 and whether determine corresponding analog switch conducting.The corresponding electric capacity of each analog switch, to control corresponding electric capacity whether place in circuit, finally obtains the equivalent capacity of different capacitance.The rise time of its corresponding single channel RC charge-discharge circuit module 9 output signal is controlled by different resistance and capacitor's capacity.Other is identical with embodiment one.
Embodiment four, composition graphs 3 illustrate present embodiment, present embodiment and embodiment one unlike: described single channel variable power supply module 8 is realized by adjustable voltage stabilizer 11 and the first digital potentiometer 12 cooperating, write different numerical value by controller 1 to the first digital potentiometer 12 to change adjustable voltage stabilizer 11 and configure resistance, thus adjustable voltage stabilizer 11 output voltage is changed.Adjustable voltage stabilizer 11 output voltage as corresponding single channel RC charge-discharge circuit module RC charging voltage, thus determines its corresponding output signal amplitude.Other is identical with embodiment one.
Embodiment five, composition graphs 3 and Fig. 5 illustrate present embodiment, present embodiment and embodiment one unlike: described single channel variable power supply module 8 is realized by adjustable voltage stabilizer 11 and the first digital potentiometer 12 cooperating, write different numerical value by controller 1 to the first digital potentiometer 12 to change adjustable voltage stabilizer 11 and configure resistance, thus adjustable voltage stabilizer 11 output voltage is changed.Adjustable voltage stabilizer 11 output voltage as corresponding single channel RC charge-discharge circuit module RC charging voltage, thus determines its corresponding output signal amplitude.Resistance selection fixed resistance value resistance 16 in single channel RC charge-discharge circuit module 9 in described multichannel RC charge-discharge circuit module 3, capacitance selection capacitor array 17 and analog switch array 18 realize, and write different numerical value whether determine corresponding analog switch conducting by controller 1 to analog switch array 18.The corresponding electric capacity of each analog switch, to control corresponding electric capacity whether place in circuit, finally obtains the equivalent capacity of different capacitance, and then controls the rise time of its corresponding single channel RC charge-discharge circuit module 9 output signal.Other is identical with embodiment one.
Embodiment six, composition graphs 3 and Fig. 6 illustrate present embodiment, present embodiment and embodiment one unlike: described single channel variable power supply module 8 is realized by adjustable voltage stabilizer 11 and the first digital potentiometer 12 cooperating, write different numerical value by controller 1 to the first digital potentiometer 12 to change adjustable voltage stabilizer 11 and configure resistance, thus adjustable voltage stabilizer 11 output voltage is changed.Adjustable voltage stabilizer 11 output voltage as corresponding single channel RC charge-discharge circuit module RC charging voltage, thus determines its corresponding output signal amplitude.Resistance selection second digital potentiometer 13 in single channel RC charge-discharge circuit module 9 in described multichannel RC charge-discharge circuit module 3, capacitance selection capacitor array 17 and analog switch array 18 realize, and write the resistance that different numerical value obtains different resistance by controller 1 to the second digital potentiometer 13; Meanwhile, write different numerical value by controller 1 to analog switch array 18 and whether determine corresponding analog switch conducting.The corresponding electric capacity of each analog switch, to control corresponding electric capacity whether place in circuit, finally obtains the equivalent capacity of different capacitance.The rise time of its corresponding single channel RC charge-discharge circuit module 9 output signal is controlled by different resistance and capacitor's capacity.Other is identical with embodiment one.
Above-mentioned embodiment is only for clearly example being described, but not the restriction to embodiment.For those of ordinary skill in the field, other multi-form change or variations can also be made on the basis of the above description.Here without the need to also giving exhaustive to all embodiments.And thus the apparent change of amplifying out or variation be still among the protection domain of the invention.
Claims (8)
1. multichannel laser echo signal simulation system, comprises controller (1), multichannel variable power supply module (2), multichannel RC charge-discharge circuit module (3) and capacitive coupling output port (5); It is characterized in that, described controller (1) controls multichannel variable power supply module (2) and provides RC charging voltage for multichannel RC charge-discharge circuit module (3), and changes the output signal amplitude of each passage by changing multichannel variable power supply module (2) Zhong Ge road output voltage correspondence; Controller (1) changes the rise time of corresponding output signal by changing resistance value, capacitance or resistance value in multichannel RC charge-discharge circuit module (3) and capacitance, and controls the delay between each multi-channel output signal by the time delay between the gauge tap signal of each passage of control multichannel RC charge-discharge circuit module (3); Described multichannel RC charge-discharge circuit module (3) output signal obtains AC compounent through capacitive coupling, and exports through capacitive coupling output port (5), realizes multichannel analog laser echo signal; Described multichannel variable power supply module (2) comprises multiple single channel variable power supply module (8), multichannel RC charge-discharge circuit module (3) comprises multiple single channel RC charge-discharge circuit module (9), described single channel variable power supply module (8) is that corresponding single channel RC charge-discharge circuit module (9) provides charging voltage, changes corresponding output signal amplitude by the output voltage values changing single channel variable power supply module (8); Described single channel RC charge-discharge circuit module (9) comprises RC charge-discharge circuit gauge tap circuit (15), for determining that RC charge-discharge circuit is in charged state or discharge condition; The delay between each multi-channel output signal is controlled by the delay between the gauge tap signal that controls each single channel RC charge-discharge circuit module (9) in multichannel RC charge-discharge circuit module (3).
2. multichannel laser echo signal simulation system according to claim 1, it is characterized in that, also comprise display system (4), keyboard (6) and power module (7), by keyboard (6), the delay between each multi-channel output signal amplitude of multichannel variable power supply module (2) and each multi-channel output signal of multichannel RC charge-discharge circuit module (3) is set, meanwhile, keyboard (6) realizes carrying out charge and discharge control to multichannel RC charge-discharge circuit module (3); And the information arranged is shown through display system (4); Power module (7) provides reference voltage for whole multichannel laser echo signal simulation system.
3. multichannel laser echo signal simulation system according to claim 1, it is characterized in that, described multichannel variable power supply module (2) selects digital to analog converter (10), export the charging voltage of different voltage as multichannel RC charge-discharge circuit module (3) by controller (1) domination number weighted-voltage D/A converter (10), determine corresponding output signal amplitude.
4. multichannel laser echo signal simulation system according to claim 1, it is characterized in that, multichannel variable power supply module (2) is coordinated by adjustable voltage stabilizer (11) and the first digital potentiometer (12), write different numerical value by controller (1) to the first digital potentiometer (12) and change adjustable voltage stabilizer (11) configuration resistance, adjustable voltage stabilizer (11) output voltage is changed, adjustable voltage stabilizer (11) output voltage is as the charging voltage of multichannel RC charge-discharge circuit module (3), determine corresponding output signal amplitude.
5. multichannel laser echo signal simulation system according to claim 1, it is characterized in that, resistance selection second digital potentiometer (13) in described multichannel RC charge-discharge circuit module (3), capacitance selection fixes capacitance electric capacity (14), controlled the resistance of the second digital potentiometer (13) by controller (1), determine the corresponding output signal rise time.
6. multichannel laser echo signal simulation system according to claim 1, it is characterized in that, resistance selection fixed resistance value resistance (16) in described multichannel RC charge-discharge circuit module (3), capacitance selection capacitor array (17) and analog switch array (18), write different numerical value by controller (1) to analog switch array (18) and whether determine corresponding digital switch conducting; The corresponding electric capacity of each analog switch, for controlling corresponding electric capacity whether place in circuit, finally obtaining the equivalent capacity of different capacitance, controlling the rise time of the output signal of corresponding single channel RC charge-discharge circuit module (9).
7. multichannel laser echo signal simulation system according to claim 1, it is characterized in that, resistance selection second digital potentiometer (13) in described multichannel RC charge-discharge circuit module (3), capacitance selection capacitor array (17) and analog switch array (18), write to the second digital potentiometer (13) resistance that different numerical value obtains different resistance by controller (1); Different numerical value is write to determine the whether conducting of corresponding analog switch to analog switch array (18) by controller (1), the corresponding electric capacity of each analog switch, for controlling corresponding electric capacity whether place in circuit, finally obtain the equivalent capacity of different capacitance; The rise time of the output signal of corresponding single channel RC charge-discharge circuit module (9) is controlled by different resistance and capacitor's capacity.
8. multichannel laser echo signal simulation system according to claim 2, is characterized in that, display system (4) selects LCD MODULE or multiple seven segment digital tubes to realize.
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| CN104035746B (en) * | 2014-06-06 | 2017-02-15 | 中国科学院长春光学精密机械与物理研究所 | Simple logarithmic change voltage generation circuit |
| US10830878B2 (en) * | 2016-12-30 | 2020-11-10 | Panosense Inc. | LIDAR system |
| CN108572355B (en) * | 2018-04-04 | 2022-03-22 | 南京理工大学 | Laser echo simulation device |
| CN110456329B (en) * | 2019-08-20 | 2021-03-02 | 哈尔滨工业大学 | High-frequency high-precision laser echo simulation system |
| CN111709206A (en) * | 2020-06-17 | 2020-09-25 | 江苏中勘地质勘查有限公司 | High-frequency radar detection circuit for three-dimensional geological exploration and detection method thereof |
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| US5636992A (en) * | 1995-12-21 | 1997-06-10 | Rockwell International Corporation | Low power pulsed laser simulator |
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| US5636992A (en) * | 1995-12-21 | 1997-06-10 | Rockwell International Corporation | Low power pulsed laser simulator |
Non-Patent Citations (2)
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| 基于RC电路模型的激光诱导生物组织光热效应;李小霞等;《光学学报》;20130131;第33卷(第1期);(0117001-1)-(0117001-5) * |
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