CN205427318U - Scanner subassembly - Google Patents
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- CN205427318U CN205427318U CN201521040867.6U CN201521040867U CN205427318U CN 205427318 U CN205427318 U CN 205427318U CN 201521040867 U CN201521040867 U CN 201521040867U CN 205427318 U CN205427318 U CN 205427318U
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Abstract
The utility model discloses a scanner subassembly. This scanner subassembly includes: the motor, motor, scanning pendulum mirror, pointolite laser instrument and photoelectricity position sensor, scanning pendulum mirror set up in on the motor, the motor drives under control circuit board's control the motion of scanning pendulum mirror, the pointolite laser instrument with photoelectricity position sensor set up in the non - imaging surface of scanning pendulum mirror is a back direction, the pointolite laser instrument to the non - imaging surface launch point light source laser of scanning pendulum mirror, the warp the non - imaging surface of scanning pendulum mirror will pointolite laser -bounce is arrived photoelectricity position sensor, the real -time position sigual of scanning pendulum mirror turned angle that photoelectricity position sensor will acquire sends control circuit board. With the aid of the technical scheme of the utility model, can the implementation structure compactness, the one -dimensional swing scanner subassembly of miniaturization, high accuracy, low -power consumption.
Description
Technical field
This utility model relates to scanning device field, particularly relates to a kind of scanner component.
Background technology
In recent years, the application breadth and depth of infrared thermal imaging technique has had significant progress, and high-performance thermal imaging system based on second filial generation focus planardetector becomes the emphasis of the development of infrared electro imaging technique such as the especially U.S. of various countries, Britain, France, Israel.Wherein the development of sweep type focus planardetector technology is the most noticeable, be widely used to hand-held night vision reconnaissance system (with France's SophieMF thermal imaging system as representative) at present, tracked armoured vehicles is seen in systems such as taking aim at fire control system (with Russia's T series main battle tank as representative), infrared track and search system (IRST), scounting aeroplane FLIR, and one of is become the main type photodetector of high-performance second filial generation thermal imaging system selection.Its feature mainly includes the following:
First, compare generation device (mainly discrete infrared detector module), secondary alignment sweep type focus planardetector assembly only need to carry out one-dimensional optical scanning, enormously simplify optical mechanical system design, scanner component only need to realize one-dimensional high accuracy scanning can meet thermal imaging system requirement；
Additionally, the infrared peak wavelength sent due to room temperature target is about about 10um, for medium wave, develop infrared detection technique based on long wave more advantage, its application scenario is widely, and be currently based on long wave and stare wave device during the infrared detector module of refrigeration mode is difficult in manufacturing process significantly, also not as medium wave on technology maturity, therefore the middle wave device with scale it is significantly larger than in Costco Wholesale, for comparing, long wave alignment sweep type device is in technique, due to medium wave on cost and cost performance, based on this reason, develop thermal imaging system based on long wave sweep type focus planardetector assembly to have broad application prospects.
For thermal imaging system based on long wave sweep type focus planardetector assembly, the most important and requisite image-forming assembly is exactly oscillatory scanning device assembly, complete for the infrared image of two dimension is presented on the detector by the one dimensional optical scanning being carried out horizontal direction by this assembly, thus realizes final infrared imaging.The more common one-dimensional scanning device assembly of tradition all uses external (mainly having GSI company of the U.S., Cambridge company of Britain etc.) special oscillating motor (motor self embedded position sensor) and special driving control circuit to realize, the volume size of its entirety is big, power consumption is high, environmental suitability poor (being all business level operating temperature), expensive and the supply of material is the most restricted, therefore develop a kind of low cost, in high precision, the one-dimensional oscillatory scanning device assembly of good environmental adaptability has great importance and strong application demand.
Utility model content
In view of the problem that in prior art, scanner component power consumption is big, scanning accuracy is low, environmental suitability is poor, volume weight is big and price is high, it is proposed that this utility model is to provide a kind of scanner component overcoming the problems referred to above or solving the problems referred to above at least in part.
This utility model provides a kind of scanner component, including: motor, scanning pendulum len, point source laser instrument and photoelectrical position sensor；
Described scanning pendulum len is arranged on described motor, and described motor drives described scanning pendulum len to move under the control of control circuit plate；Described point source laser instrument and described photoelectrical position sensor are arranged at the non-imaged face i.e. direction, the back side of described scanning pendulum len, described point source laser instrument is to the non-imaged surface launching point source laser of described scanning pendulum len, through the non-imaged face of described scanning pendulum len, the scanning pendulum len rotational angle real-time position signal of acquisition is sent to described control circuit plate by described point source laser-bounce to described photoelectrical position sensor, described photoelectrical position sensor.
This utility model has the beneficial effect that:
Technical scheme by means of this utility model embodiment, solve the problem that in prior art, scanner component power consumption is big, scanning accuracy is low, environmental suitability is poor, volume weight is big and price is high, be capable of compact conformation, miniaturization, in high precision, the one-dimensional oscillatory scanning device assembly of low-power consumption, power consumption, linearity, scan efficiency, environmental suitability and weight all have and significantly improve and improve.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be practiced according to the content of description, and in order to above and other objects, features and advantages of the present utility model can be become apparent, below especially exemplified by detailed description of the invention of the present utility model.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit those of ordinary skill in the art be will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and is not considered as restriction of the present utility model.And in whole accompanying drawing, it is denoted by the same reference numerals identical parts.In the accompanying drawings:
Fig. 1 is the structural representation of the scanner component of this utility model embodiment；
Fig. 2 be the scanner component of this utility model embodiment realize schematic diagram；
Fig. 3 be the scanner component of this utility model embodiment realize effect schematic diagram；
Fig. 4 be the scanner component of the non-band object of this utility model embodiment realize effect schematic diagram；
Fig. 5 be the scanner component of this utility model embodiment realize basic principle schematic；
Fig. 6 is the high precision photoelectric position sensor circuit schematic diagram of this utility model embodiment；
Fig. 7 is position signalling division and the peaker schematic diagram of this utility model embodiment；
Fig. 8 is the circuit diagram of the sawtooth waveforms reference signal generation of this utility model embodiment；
Fig. 9 is the circuit diagram that the PID of this utility model embodiment is automatically adjusted；
Figure 10 is that the PID of this utility model embodiment is automatically adjusted the circuit diagram that output signal filters；
Figure 11 is that the motor of this utility model embodiment drives power amplification circuit schematic diagram；
Figure 12 be this utility model embodiment be respectively adopted former G120 scan components and scanner component actual drive output sawtooth waveforms control signal performance test schematic diagram；
Figure 13 be this utility model embodiment be respectively adopted former G120 scan components and the scanner component application design sketch in infrared imaging system.
Detailed description of the invention
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing showing the exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and should not limited by embodiments set forth here.On the contrary, it is provided that these embodiments are able to be best understood from the disclosure, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
In order to solve the problem that in prior art, scanner component power consumption is big, scanning accuracy is low, environmental suitability is poor, volume weight is big and price is high, this utility model provides a kind of scanner component and scanning pendulum len control method, below in conjunction with accompanying drawing and embodiment, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, does not limit this utility model.
According to embodiment of the present utility model, provide a kind of scanner component, for thermal imager based on linear IRFPA, Fig. 1 is the structural representation of the scanner component of this utility model embodiment, as shown in Figure 1, scanner component according to this utility model embodiment includes: motor 10, scanning pendulum len 11, point source laser instrument 12 and photoelectrical position sensor 13, is described in detail the modules of this utility model embodiment below.
Motor 10, is connected to scanning pendulum len 11, and external control circuit plate, for driving described scanning pendulum len to move under the control of control circuit plate；Preferably, described motor 10 is: direct current generator 10.
Described point source laser instrument 12 and described photoelectrical position sensor 13 are arranged at the non-imaged face i.e. direction, the back side of described scanning pendulum len 11, described point source laser instrument 12 is to the non-imaged surface launching point source laser of described scanning pendulum len 11, through the non-imaged face of described scanning pendulum len 11, the scanning pendulum len rotational angle real-time position signal of acquisition is sent to external described control circuit plate by described point source laser-bounce to described photoelectrical position sensor 13, described photoelectrical position sensor 13.
Below in conjunction with accompanying drawing, the technique scheme of this utility model embodiment is described in detail.
Scanner component is important Light Electrical parts in secondary thermal imager based on linear IRFPA, and the quality of its performance directly affects the overall performance index of thermal imaging system.The purpose of this utility model be to provide a kind of realize low-power consumption, in high precision, the method for miniaturization one-dimensional scanning device assembly, on the basis of meeting high scanning accuracy (≤0.5 pixel) and high environmental suitability (operating temperature is-40 DEG C～+70 DEG C) as far as possible, it is greatly reduced the volume of thermal imaging system complete machine, reduce total power consumption and the cost of thermal imaging system, and ensure good infrared imaging effect.
The scanner component of this utility model embodiment is mainly used in secondary thermal imager based on linear IRFPA system, the problem such as can solve that scanner component power consumption is big, scanning accuracy is low, environmental suitability is poor, volume weight is big and price is high, main uses techniques below means to realize:
nullFig. 2 be the scanner component of this utility model embodiment realize schematic diagram，Fig. 3 be the scanner component of this utility model embodiment realize effect schematic diagram，Fig. 4 be the scanner component of the non-band object of this utility model embodiment realize effect schematic diagram，Fig. 5 be the scanner component of this utility model embodiment realize basic principle schematic，As shown in Figure 2-5，The technical scheme of this utility model embodiment uses common DC motor as the drive mechanism of scanning pendulum len，Utilize the back side (non-imaged face) of point source laser illumination scanning pendulum len，The reflection source at the pendulum mirror back side is received by high precision photoelectric position sensor (PSD)，PSD generates the real-time position signal of pendulum mirror rotational angle after carrying out corresponding opto-electronic conversion，The pendulum mirror reference signal that real time position feedback signal and the thermal imager system of pendulum mirror are required by motor driving controling circuit synthesizes，Generate position error signal，Error signal produces to drive through PID arithmetic and controls，After drive amplification，Drive motor is rocked to require position，Thus the high precision closed loop realizing putting mirror controls.
Fig. 6 is the high precision photoelectric position sensor circuit schematic diagram of this utility model embodiment, as shown in Figure 6, system power supply plate offer ± 12V, ± 5V power supply input, and provide working power to after processing after filtering laser instrument and high precision photoelectric position sensor (PSD).Laser instrument is launched laser scanned pendulum mirror backside reflection after powering up and is entered PSD photosurface, position signalling X1, X2 of PSD Output of laser luminous point.X1 and X2 generates two signals of X1-X2, X1+X2 by operational amplifier chip OP484.
Fig. 7 is position signalling division and the peaker schematic diagram of this utility model embodiment, as shown in Figure 7, two signals of X1-X2, X1+X2 input special divider AD734, then laser spot positions signal AC_POS is generated by AD734, the angle that this signal and pendulum mirror swing is linearly proportional, AC_POS generates pulse square wave signal by peaker, is scanned position judgment through optocoupler coupling input FPGA.
Fig. 8 is the circuit diagram of the sawtooth waveforms reference signal generation of this utility model embodiment, as shown in Figure 8, FPGA generates SPI communication command according to the position of scanning, controlling DA conversion chip TLV5618A and generate sawtooth sweep control reference signal OUT_DA, this signal generates sawtooth signal WAVE_OUT through amplifier conditioning and bias treatment.
Fig. 9 is the circuit diagram that the PID of this utility model embodiment is automatically adjusted, as shown in Figure 9, sawtooth signal WAVE_OUT and laser spot positions signal AC_POS are automatically adjusted module as input PID, PID is automatically adjusted module and is provided simultaneously with ratio, integration and differential regulation, generates the signal PID_NUM after regulation.
Figure 10 is that the PID of this utility model embodiment is automatically adjusted the circuit diagram that output signal filters, and as shown in Figure 10, signal PID_NUM carries out scaling by amplifier OP284, and carries out front stage isolation through penetrating with circuit, generates signal PID_OUT.
Figure 11 is that the motor of this utility model embodiment drives power amplification circuit schematic diagram, and as shown in figure 11, above-mentioned PID_OUT signal generates final motor drive signal MOTOR+, MOTOR-through power amplifier PA75CC, thus drives electric machine rotation.
Former thermal imager based on linear IRFPA is essentially all the G120 scan components (containing motor special and driving control circuit) using GSI company of the U.S..After control program in using this utility model to create, all having and significantly improve and improve in power consumption, linearity, scan efficiency, environmental suitability and weight, concrete contrast table and effect are shown in Table 1 and Figure 12.
Table 1
Figure 12 be this utility model embodiment be respectively adopted former G120 scan components and scanner component actual drive output sawtooth waveforms control signal performance test schematic diagram, as shown in figure 12, the left side is G120 assembly, the right is the scanner component of this utility model embodiment, can be seen that its sawtooth retrace time of scanner component of this utility model embodiment shortens, the linearity is more preferable.It should be noted that the load that the test condition of the performance test results shown in Figure 12 is scan components is identical, input reference sawtooth signal frequency is 50Hz, and yellow signal is the benchmark sawtooth signal of input, and blue signal is actual drive feedback signal.
Figure 13 be this utility model embodiment be respectively adopted former G120 scan components and the scanner component application design sketch in infrared imaging system, as shown in figure 13, the left side is G120 assembly, the right is the scanner component of this utility model embodiment, as can be seen from the figure the image of the latter is apparent stable, without sawtooth sense；The right and the left side carry out contrasting it can be seen that have obvious sawtooth at electric cautery on the right side of figure, and its reason is exactly that scanning device linearity in this place is bad caused.
This utility model embodiment is avoided using high-precision encoder, it is easy to circuit design, and control stability is prone to ensure, thus reduces production cost.LASER Light Source is positioned at after scanning mirror, will not produce normal light path and interfere, and LASER Light Source volume is little, positive good utilisation scanning mirror space below, makes compact overall structure.By optimizing the most original lower power consumption of power consumption of design scanner component about 3w, improvement is considerable, for the 1/10 of thermal imaging system Overall Power Consumption；Scanning device heat dissipation capacity also greatly reduces than original system, improves the working environment in complete machine casing, is conducive to improving stability and the environmental suitability of thermal imaging system complete machine, alleviates system weight simultaneously；Scanner component after using this utility model to create has had more preferable blur-free imaging effect to the imaging of thermal imaging system complete machine.
Obviously, those skilled in the art can carry out various change and modification without deviating from spirit and scope of the present utility model to this utility model.So, if these amendments of the present utility model and modification belong within the scope of this utility model claim and equivalent technologies thereof, then this utility model is also intended to comprise these change and modification.
Claims (2)
1. a scanner component, for thermal imager based on linear IRFPA, it is characterised in that including: motor, scanning pendulum len, point source laser instrument and photoelectrical position sensor；
Described scanning pendulum len is arranged on described motor, and described motor drives described scanning pendulum len to move under the control of control circuit plate；Described point source laser instrument and described photoelectrical position sensor are arranged at the non-imaged face i.e. direction, the back side of described scanning pendulum len, described point source laser instrument is to the non-imaged surface launching point source laser of described scanning pendulum len, through the non-imaged face of described scanning pendulum len, the scanning pendulum len rotational angle real-time position signal of acquisition is sent to described control circuit plate by described point source laser-bounce to described photoelectrical position sensor, described photoelectrical position sensor.
2. scanner component as claimed in claim 1, it is characterised in that described motor is: direct current generator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521040867.6U CN205427318U (en) | 2015-12-15 | 2015-12-15 | Scanner subassembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521040867.6U CN205427318U (en) | 2015-12-15 | 2015-12-15 | Scanner subassembly |
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| CN205427318U true CN205427318U (en) | 2016-08-03 |
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| CN201521040867.6U Expired - Fee Related CN205427318U (en) | 2015-12-15 | 2015-12-15 | Scanner subassembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060146A (en) * | 2018-06-28 | 2018-12-21 | 湖北久之洋红外系统股份有限公司 | A kind of scanning galvanometer control system for the infrared wide area imaging of face battle array |
| CN111540306A (en) * | 2020-04-23 | 2020-08-14 | 歌尔股份有限公司 | Display method, display device, and computer-readable storage medium |
-
2015
- 2015-12-15 CN CN201521040867.6U patent/CN205427318U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060146A (en) * | 2018-06-28 | 2018-12-21 | 湖北久之洋红外系统股份有限公司 | A kind of scanning galvanometer control system for the infrared wide area imaging of face battle array |
| CN111540306A (en) * | 2020-04-23 | 2020-08-14 | 歌尔股份有限公司 | Display method, display device, and computer-readable storage medium |
| CN111540306B (en) * | 2020-04-23 | 2022-03-25 | 歌尔光学科技有限公司 | Display method, display device, and computer-readable storage medium |
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Granted publication date: 20160803 |