CN105404001A - Scanner assembly and scanning oscillating mirror control method - Google Patents
Scanner assembly and scanning oscillating mirror control method Download PDFInfo
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- CN105404001A CN105404001A CN201510930409.8A CN201510930409A CN105404001A CN 105404001 A CN105404001 A CN 105404001A CN 201510930409 A CN201510930409 A CN 201510930409A CN 105404001 A CN105404001 A CN 105404001A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
Abstract
The invention discloses a scanner assembly and a scanning oscillating mirror control method. The scanner assembly comprises a motor which is connected with a scanning oscillating mirror and a control circuit board and is further used for driving the scanning oscillating mirror to a required position according to driving signals of the motor; a scanning oscillating mirror for oscillating under the control of the motor and reflecting spot light source lasers emitted by a spot light source laser to a photoelectric position sensor; the spot light source laser arranged at the non-imaging surface, i.e., the back-surface direction of the scanning oscillating mirror; the photoelectric position sensor arranged at the non-imaging surface, i.e., the back-surface direction, of the scanning oscillating mirror; the control circuit board connected with the motor and the photoelectric position sensor; and a bandpass filter connected with the control circuit board and the motor. By means of the technical scheme provided by the invention, the realized one-dimensional oscillating scanner assembly has the advantages of compact structure, miniaturization, high precision and low loss.
Description
Technical field
The present invention relates to scanner field, particularly relate to a kind of scanner component and scanning pendulum len control method.
Background technology
In recent years, the application breadth and depth of infrared thermal imaging technique has had significant progress, and the high-performance thermal imaging system based on second generation focus planardetector becomes the emphasis of the various countries' especially infrared electro imaging technique such as the U.S., Britain, France, Israel development.Wherein the development of sweep type focus planardetector technology is particularly noticeable, be widely used at present hand-held night vision reconnaissance system (with French SophieMF thermal imaging system for representative), tracked armoured vehicles seen in systems such as taking aim at fire control system (with Russian T series main battle tank for representative), infrared track and search system (IRST), scounting aeroplane FLIR (Forward-Looking Infrared), and become one of main type photodetector that high-performance second generation thermal imaging system selects.Its feature mainly comprises as follows:
First, compare generation device (mainly discrete infrared detector module), two generation alignment sweep type focus planardetector assembly only need carry out the optical scanning of one dimension, enormously simplify optical-mechanical system design, the high precision scanning that scanner component only need realize one dimension can meet thermal imaging system requirement;
In addition, the infrared peak wavelength sent due to normal temperature target is about about 10um, for medium wave, the infrared detection technique developed based on long wave has more advantage, its application scenario widely, and the infrared detector module at present staring refrigeration mode based on long wave be greatly difficult in manufacturing process in wave device, also not as medium wave on technology maturity, therefore in Costco Wholesale far away higher than wave device in same scale, compare, long wave alignment sweep type device is in technique, due to medium wave in cost and cost performance, based on this reason, the thermal imaging system developed based on long wave sweep type focus planardetector assembly has broad application prospects.
Concerning the thermal imaging system based on long wave sweep type focus planardetector assembly, wherein important and requisite image-forming assembly is exactly oscillatory scanning device assembly, complete for the infrared image of two dimension presents on the detector by the one dimensional optical scanning being carried out horizontal direction by this assembly, thus realizes final infrared imaging.The one-dimensional scanning device assembly that tradition is comparatively commonly used all adopts external (mainly containing GSI company of the U.S., Cambridge company of Britain etc.) special oscillating motor (motor self embedded position sensor) and special Drive and Control Circuit to realize, the volume size of its entirety is large, power consumption is high, environmental suitability poor (being all business level working temperatures), expensive and the supply of material easily restricted, therefore develop a kind of low cost, high precision, good environmental adaptability one dimension oscillatory scanning device assembly have great importance and strong application demand.
Summary of the invention
In view of the problem that in prior art, scanner component power consumption is large, scanning accuracy is low, environmental suitability is poor, volume weight is large and price is high, propose the present invention to provide a kind of overcoming the problems referred to above or the scanner component solved the problem at least in part and scanning pendulum len control method.
The invention provides a kind of scanner component, comprising:
Motor, is connected to scanning pendulum len and control circuit board, for driving scanning pendulum len to swing, and sends drive singal to control circuit board;
Scanning pendulum len, for swinging under the control of motor, and the pointolite laser reflection launched by pointolite laser instrument is to photoelectrical position sensor;
Pointolite laser instrument, is arranged at non-imaged face and the direction, the back side of scanning pendulum len, for the non-imaged surface launching pointolite laser to scanning pendulum len;
Photoelectrical position sensor, be arranged at non-imaged face and the direction, the back side of scanning pendulum len, for receiving the pointolite laser of the non-imaged face reflection of scanning pendulum len, generating scanning pendulum len rotational angle real-time position signal according to pointolite laser, and being sent to control circuit board;
Control circuit board, be connected with motor and photoelectrical position sensor, for under the driving of the drive singal of motor, synthesize according to the sawtooch sweep pendulum mirror reference signal that scanning pendulum len rotational angle real-time position signal and thermal imager based on linear IRFPA require, generate position error signal, and generate site error drive control signal through PID arithmetic, site error drive control signal is sent to bandpass filter;
Bandpass filter, is connected with control circuit board and motor, for carrying out notch filter and power amplification process to position error-driven control signal, generates the motor drive signal of drive motor;
Motor is further used for: drive scanning pendulum len to requiring position according to motor drive signal.
Present invention also offers a kind of scanning pendulum len control method, for above-mentioned scanner component, comprising:
Pointolite laser instrument is to the non-imaged surface launching pointolite laser of scanning pendulum len, and the pointolite laser reflection that pointolite laser instrument is launched by scanning pendulum len is to photoelectrical position sensor;
Photoelectrical position sensor receives the pointolite laser of the non-imaged face reflection of scanning pendulum len, generates scanning pendulum len rotational angle real-time position signal, and be sent to control circuit board according to pointolite laser;
Control circuit board is under the driving of the drive singal of motor, synthesize according to the sawtooch sweep pendulum mirror reference signal that scanning pendulum len rotational angle real-time position signal and thermal imager based on linear IRFPA require, generate position error signal, and generate site error drive control signal through PID arithmetic, site error drive control signal is sent to bandpass filter;
Bandpass filter carries out notch filter and power amplification process to position error-driven control signal, generates the motor drive signal of drive motor;
Motor drives scanning pendulum len to requiring position according to motor drive signal.
Beneficial effect of the present invention is as follows:
By means of the technical scheme of the embodiment of the present invention, solve the problem that in prior art, scanner component power consumption is large, scanning accuracy is low, environmental suitability is poor, volume weight is large and price is high, the one dimension oscillatory scanning device assembly of compact conformation, miniaturization, high precision, low-power consumption can be realized, power consumption, linearity, scan efficiency, environmental suitability and weight all have and significantly improves and improve.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of instructions, and can become apparent, below especially exemplified by the specific embodiment of the present invention to allow above and other objects of the present invention, feature and advantage.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 is the structural representation of the scanner component of the embodiment of the present invention;
Fig. 2 be the scanner component of the embodiment of the present invention realize schematic diagram;
Fig. 3 is the schematic diagram in kind of the scanner component of the embodiment of the present invention;
Fig. 4 be the scanner component of the embodiment of the present invention realize effect schematic diagram;
Fig. 5 be the scanner component with object of the embodiment of the present invention realize effect schematic diagram;
Fig. 6 be the scanner component of the embodiment of the present invention realize basic principle schematic;
Fig. 7 is the high precision photoelectric position sensor circuit schematic diagram of the embodiment of the present invention;
Fig. 8 is position signalling division and the differentiating circuit schematic diagram of the embodiment of the present invention;
Fig. 9 is the circuit diagram that the sawtooth wave reference signal of the embodiment of the present invention produces;
Figure 10 is the circuit diagram that the PID of the embodiment of the present invention regulates automatically;
Figure 11 is the circuit diagram of the automatic regulation output signal filtering of PID of the embodiment of the present invention;
Figure 12 is the motor driving power amplifying circuit schematic diagram of the embodiment of the present invention;
Figure 13 is the performance test schematic diagram adopting former G120 scan components and scanner component actual driver output sawtooth wave control signal respectively of the embodiment of the present invention;
Figure 14 be the embodiment of the present invention adopt former G120 scan components and the scanner component effect figure in infrared imaging system respectively;
Figure 15 is the process flow diagram of the scanning pendulum len control method of the embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings exemplary embodiment of the present disclosure is described in more detail.Although show exemplary embodiment of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the embodiment set forth here.On the contrary, provide these embodiments to be in order to more thoroughly the disclosure can be understood, 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 large, scanning accuracy is low, environmental suitability is poor, volume weight is large and price is high, the invention provides a kind of scanner component and scanning pendulum len control method, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, do not limit the present invention.
Device embodiment
According to embodiments of the invention, provide a kind of scanner component, for thermal imager based on linear IRFPA, Fig. 1 is the structural representation of the scanner component of the embodiment of the present invention, as shown in Figure 1, scanner component according to the embodiment of the present invention comprises: motor 10, scanning pendulum len 11, pointolite laser instrument 12, photoelectrical position sensor 13, control circuit board 14 and bandpass filter 15, be described in detail the modules of the embodiment of the present invention below.
Motor 10, is connected to scanning pendulum len 11 and control circuit board 14, for driving described scanning pendulum len 11 to swing, and sends drive singal to described control circuit board 14; Preferably, described motor 10 is: direct current generator 10.
Described scanning pendulum len 11, for swinging under the control of described motor 10, and the pointolite laser reflection launched by pointolite laser instrument 12 is to photoelectrical position sensor 13;
Described pointolite laser instrument 12, is arranged at non-imaged face and the direction, the back side of described scanning pendulum len 11, for the non-imaged surface launching pointolite laser to described scanning pendulum len 11;
Described photoelectrical position sensor 13, be arranged at non-imaged face and the direction, the back side of described scanning pendulum len 11, for receiving the described pointolite laser of the non-imaged face reflection of described scanning pendulum len 11, generate scanning pendulum len 11 rotational angle real-time position signal according to described pointolite laser, and be sent to described control circuit board 14; Described photoelectrical position sensor 13 specifically comprises: photoelectric conversion module, operational amplifier module, special divider, differentiating circuit and optocoupler, particularly:
Photoelectric conversion module, for receiving the described pointolite laser of the non-imaged face reflection of described scanning pendulum len 11, be converted to electric signal to described pointolite laser from light signal, light spot position X1 and X2 of output point light source laser is to operational amplifier module;
Described operational amplifier module, for generating X1-X2 and X1+X2 two signals according to described light spot position signal X1 and X2, is input to special divider;
Described special divider, for generating scanning pendulum len 11 rotational angle real-time position signal AC_POS according to X1-X2 signal and X1+X2 signal, and described AC_POS signal is sent to differentiating circuit, wherein, the angle that described AC_POS signal and described scanning pendulum len 11 swing is linearly;
Described differentiating circuit, for according to described AC_POS signal production burst square-wave signal;
Optocoupler, inputs described control circuit board 14 after being coupled by described pulse square wave signal.
Described control circuit board 14, be connected with described motor 10 and described photoelectrical position sensor 13, for under the driving of the drive singal of described motor 10, synthesize according to sawtooch sweep pendulum mirror 11 reference signal that described scanning pendulum len 11 rotational angle real-time position signal and described thermal imager based on linear IRFPA require, generate position error signal, and generate site error drive control signal through PID arithmetic, described site error drive control signal is sent to bandpass filter 15; Described control circuit board 14 specifically comprises: the automatic adjustment module of FPGA, DA conversion chip, PID, operational amplifier and penetrate with circuit, particularly:
FPGA, generates SPI communication command for the scanning position according to described scanning pendulum len 11, is sent to DA conversion chip;
Described DA conversion chip, controlling reference signal OUT_DA for generating sawtooch sweep according to described SPI communication command, carrying out amplifier conditioning and bias treatment to described OUT_DA signal, generates sawtooch sweep pendulum mirror 11 reference signal WAVE_OUT.
The automatic adjustment module of PID, carries out ratio for receiving described WAVE_OUT signal and described AC_POS signal, integration and differentiation regulates, and the PID_NUM signal generated after regulating also is sent to operational amplifier;
Described operational amplifier, for carrying out scale amplifying and be sent to penetrating with circuit to described PID_NUM signal;
Describedly penetrating with circuit, for carrying out front stage isolation to the described PID_NUM signal after amplifying, generating site error drive control signal PID_OUT.
Described bandpass filter 15, is connected with described control circuit board 14 and described motor 10, for carrying out notch filter and power amplification process to described site error drive control signal, generates motor 10 drive singal driving described motor 10; Described bandpass filter 15 specifically comprises:
Power amplifier, for carrying out notch filter and power amplification process to described PID_OUT signal, generates motor 10 drive singal MOTOR+, MOTOR-of driving described motor 10.
Described motor 10 is further used for: drive described scanning pendulum len 11 to requiring position according to described motor 10 drive singal.
Below in conjunction with accompanying drawing, the technique scheme of the embodiment of the present invention is described in detail.
Scanner component is important Light Electrical parts in two generation thermal imager based on linear IRFPA, and the quality of its performance directly affects the overall performance index of thermal imaging system.The object of this invention is to provide a kind of method realizing low-power consumption, high precision, miniaturization one-dimensional scanning device assembly, on the basis of As soon as possible Promising Policy high scanning accuracy (≤0.5 pixel) and high environmental suitability (working temperature is-40 DEG C ~+70 DEG C), greatly reduce 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 the embodiment of the present invention is mainly used in two generation thermal imager based on linear IRFPA systems, the problem such as can solve that scanner component power consumption is large, scanning accuracy is low, environmental suitability is poor, volume weight is large and price is high, mainly adopts following technological means to realize:
Fig. 2 be the scanner component of the embodiment of the present invention realize schematic diagram, Fig. 3 is the schematic diagram in kind of the scanner component of the embodiment of the present invention, Fig. 4 be the scanner component of the embodiment of the present invention realize effect schematic diagram, Fig. 5 be the scanner component with object of the embodiment of the present invention realize effect schematic diagram, Fig. 6 be the scanner component of the embodiment of the present invention realize basic principle schematic, as shown in figures 2-6, the technical scheme of the embodiment of the present invention adopts common DC motor as the driving mechanism of scanning pendulum len, utilize the back side (non-imaged face) of pointolite laser illumination scanning pendulum len, the reflection source at the pendulum mirror back side is received by high precision photoelectric position transducer (PSD), PSD generates the real-time position signal of pendulum mirror rotational angle after carrying out corresponding opto-electronic conversion, motor driving controling circuit synthesizes the pendulum mirror reference signal that the real time position feedback signal of pendulum mirror and thermal imager system require, generate position error signal, error signal produces drived control through PID arithmetic, after drive amplification, drive motor is rocked to and requires position, thus the high precision closed loop realizing pendulum mirror controls.
Fig. 7 is the high precision photoelectric position sensor circuit schematic diagram of the embodiment of the present invention, as shown in Figure 7, system power supply plate provides ± 12V, ± 5V power supply to input, and provides working power to after process after filtering laser instrument and high precision photoelectric position transducer (PSD).Laser instrument powers up rear Emission Lasers and enters PSD photosurface through scanning pendulum len backside reflection, position signalling X1, X2 of PSD Output of laser luminous point.X1 and X2 generates X1-X2, X1+X2 two signals by operational amplifier chip OP484.
Fig. 8 is position signalling division and the differentiating circuit schematic diagram of the embodiment of the present invention, as shown in Figure 8, X1-X2, X1+X2 two signals 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, by differentiating circuit production burst square-wave signal, carries out scanning position judgement through optocoupler coupling input FPGA.
Fig. 9 is the circuit diagram that the sawtooth wave reference signal of the embodiment of the present invention produces, as shown in Figure 9, FPGA generates SPI communication command according to the position of scanning, control DA conversion chip TLV5618A generates sawtooch sweep and controls reference signal OUT_DA, and this signal generates sawtooth signal WAVE_OUT through amplifier conditioning and bias treatment.
Figure 10 is the circuit diagram that the PID of the embodiment of the present invention regulates automatically, as shown in Figure 10, sawtooth signal WAVE_OUT and laser spot positions signal AC_POS is as the automatic adjustment module of input PID, the automatic adjustment module of PID possesses ratio simultaneously, integration and differentiation regulates, and generates the signal PID_NUM after regulating.
Figure 11 is the circuit diagram of the automatic regulation output signal filtering of PID of the embodiment of the present invention, and as shown in figure 11, signal PID_NUM carries out scale amplifying by amplifier OP284, and carries out front stage isolation through penetrating with circuit, generates signal PID_OUT.
Figure 12 is the motor driving power amplifying circuit schematic diagram of the embodiment of the present invention, and as shown in figure 12, above-mentioned PID_OUT signal generates final motor drive signal MOTOR+, MOTOR-through power amplifier PA75CC, thus drive motor rotates.
All the G120 scan components (containing motor special and Drive and Control Circuit) adopting GSI company of the U.S. substantially in former thermal imager based on linear IRFPA.After adopting the control program in the invention, power consumption, linearity, scan efficiency, environmental suitability and weight all have and significantly improves and improve, concrete contrast table and effect are in table 1 and Figure 13.
Table 1
Figure 13 is the performance test schematic diagram adopting former G120 scan components and scanner component actual driver output sawtooth wave control signal respectively of the embodiment of the present invention, as shown in figure 13, the left side is G120 assembly, the right is the scanner component of the embodiment of the present invention, can find out its sawtooth retrace time shorten of scanner component of the embodiment of the present invention, the linearity is better.It should be noted that, the load that the test condition of the performance test results shown in Figure 13 is scan components is identical, and 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 14 be the embodiment of the present invention adopt former G120 scan components and the scanner component effect figure in infrared imaging system respectively, as shown in figure 14, the left side is G120 assembly, the right is the scanner component of the embodiment of the present invention, as can be seen from the figure the image of the latter is more steady and audible, without sawtooth sense; The right and the left side are carried out contrast and can be found out, have obvious sawtooth at the electric soldering iron place on figure right side, its reason be exactly scanner bad at the linearity at this place caused by.
The embodiment of the present invention is avoided using high-precision scrambler, is easy to circuit design, and control stiffness is easy to ensure, thus reduces production cost.LASER Light Source is positioned at after scanning mirror, and can 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 the power consumption of optimal design scanner component just more original lower power consumption about 3w, improvement is considerable, is 1/10 of thermal imaging system Overall Power Consumption; Scanner heat dissipation capacity also greatly reduces than original system, improves the working environment in complete machine casing, is conducive to the stability and the environmental suitability that improve thermal imaging system complete machine, alleviates system weight simultaneously; The imaging of scanner component to thermal imaging system complete machine after the invention is adopted to have better blur-free imaging effect.
Embodiment of the method
According to embodiments of the invention, provide a kind of scanning pendulum len control method, for above-mentioned scanner component, Figure 15 is the process flow diagram of the scanning pendulum len control method of the embodiment of the present invention, as shown in figure 15, following process is comprised according to the scanning pendulum len control method of the embodiment of the present invention:
Step 1501, pointolite laser instrument is to the non-imaged surface launching pointolite laser of scanning pendulum len, and the pointolite laser reflection that pointolite laser instrument is launched by scanning pendulum len is to photoelectrical position sensor;
Step 1502, photoelectrical position sensor receives the pointolite laser of the non-imaged face reflection of scanning pendulum len, generates scanning pendulum len rotational angle real-time position signal, and be sent to control circuit board according to pointolite laser;
Step 1502 specifically comprises:
1, photoelectric conversion module receives the pointolite laser of the non-imaged face reflection of scanning pendulum len, and be converted to electric signal to pointolite laser from light signal, light spot position X1 and X2 of output point light source laser is to operational amplifier module;
2, operational amplifier module generates X1-X2 and X1+X2 two signals according to light spot position signal X1 and X2, is input to special divider;
3, special divider generates scanning pendulum len rotational angle real-time position signal AC_POS according to X1-X2 signal and X1+X2 signal, and AC_POS signal is sent to differentiating circuit, and wherein, the angle that AC_POS signal and scanning pendulum len swing linearly;
4, differentiating circuit is according to AC_POS signal production burst square-wave signal;
5, optocoupler pulse square wave signal is coupled after input control circuit plate.
Step 1503, control circuit board is under the driving of the drive singal of motor, synthesize according to the sawtooch sweep pendulum mirror reference signal that scanning pendulum len rotational angle real-time position signal and thermal imager based on linear IRFPA require, generate position error signal, and generate site error drive control signal through PID arithmetic, site error drive control signal is sent to bandpass filter;
Step 1503 specifically comprises:
1, FPGA generates SPI communication command according to the scanning position of scanning pendulum len, is sent to DA conversion chip;
2, DA conversion chip generates sawtooch sweep according to SPI communication command and controls reference signal OUT_DA, carries out amplifier conditioning and bias treatment to OUT_DA signal, generates sawtooch sweep pendulum mirror reference signal WAVE_OUT.
3, the automatic adjustment module reception WAVE_OUT signal of PID and AC_POS signal carry out ratio, integration and differentiation adjustment, and the PID_NUM signal generated after regulating also is sent to operational amplifier;
4, operational amplifier carries out scale amplifying to PID_NUM signal and is sent to penetrating with circuit;
5, penetrate, with circuit, front stage isolation is carried out to the PID_NUM signal after amplifying, generate site error drive control signal PID_OUT.
Step 1504, bandpass filter carries out notch filter and power amplification process to position error-driven control signal, generates the motor drive signal of drive motor; Particularly, the power amplifier in bandpass filter carries out notch filter and power amplification process to PID_OUT signal, generates motor drive signal MOTOR+, the MOTOR-of drive motor.
Step 1505, motor drives scanning pendulum len to requiring position according to motor drive signal.
Preferably, above-mentioned motor is: direct current generator.
By means of the technical scheme of the embodiment of the present invention, solve the problem that in prior art, scanner component power consumption is large, scanning accuracy is low, environmental suitability is poor, volume weight is large and price is high, the one dimension oscillatory scanning device assembly of compact conformation, miniaturization, high precision, low-power consumption can be realized, power consumption, linearity, scan efficiency, environmental suitability and weight all have and significantly improves and improve.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Intrinsic not relevant to any certain computer, virtual system or miscellaneous equipment with display at this algorithm provided.Various general-purpose system also can with use based on together with this teaching.According to description above, the structure constructed required by this type systematic is apparent.In addition, the present invention is not also for any certain programmed language.It should be understood that and various programming language can be utilized to realize content of the present invention described here, and the description done language-specific is above to disclose preferred forms of the present invention.
In instructions provided herein, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand in each inventive aspect one or more, in the description above to exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or the description to it sometimes.But, the method for the disclosure should be construed to the following intention of reflection: namely the present invention for required protection requires feature more more than the feature clearly recorded in each claim.Or rather, as claims below reflect, all features of disclosed single embodiment before inventive aspect is to be less than.Therefore, the claims following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
Those skilled in the art are appreciated that and adaptively can change the module in the client in embodiment and they are arranged in one or more clients different from this embodiment.Block combiner in embodiment can be become a module, and multiple submodule or subelement or sub-component can be put them in addition.Except at least some in such feature and/or process or unit be mutually repel except, any combination can be adopted to combine all processes of all features disclosed in this instructions (comprising adjoint claim, summary and accompanying drawing) and so disclosed any method or client or unit.Unless expressly stated otherwise, each feature disclosed in this instructions (comprising adjoint claim, summary and accompanying drawing) can by providing identical, alternative features that is equivalent or similar object replaces.
In addition, those skilled in the art can understand, although embodiments more described herein to comprise in other embodiment some included feature instead of further feature, the combination of the feature of different embodiment means and to be within scope of the present invention and to form different embodiments.Such as, in the following claims, the one of any of embodiment required for protection can use with arbitrary array mode.
All parts embodiment of the present invention with hardware implementing, or can realize with the software module run on one or more processor, or realizes with their combination.It will be understood by those of skill in the art that the some or all functions of some or all parts be loaded with in the client of sequence network address that microprocessor or digital signal processor (DSP) can be used in practice to realize according to the embodiment of the present invention.The present invention can also be embodied as part or all equipment for performing method as described herein or device program (such as, computer program and computer program).Realizing program of the present invention and can store on a computer-readable medium like this, or the form of one or more signal can be had.Such signal can be downloaded from internet website and obtain, or provides on carrier signal, or provides with any other form.
The present invention will be described instead of limit the invention to it should be noted above-described embodiment, and those skilled in the art can design alternative embodiment when not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and does not arrange element in the claims or step.Word "a" or "an" before being positioned at element is not got rid of and be there is multiple such element.The present invention can by means of including the hardware of some different elements and realizing by means of the computing machine of suitably programming.In the unit claim listing some devices, several in these devices can be carry out imbody by same hardware branch.Word first, second and third-class use do not represent any order.Can be title by these word explanations.
Claims (10)
1. a scanner component, for thermal imager based on linear IRFPA, is characterized in that, comprising:
Motor, is connected to scanning pendulum len and control circuit board, for driving described scanning pendulum len to swing, and sends drive singal to described control circuit board;
Described scanning pendulum len, for swinging under the control of described motor, and the pointolite laser reflection launched by pointolite laser instrument is to photoelectrical position sensor;
Described pointolite laser instrument, is arranged at non-imaged face and the direction, the back side of described scanning pendulum len, for the non-imaged surface launching pointolite laser to described scanning pendulum len;
Described photoelectrical position sensor, be arranged at non-imaged face and the direction, the back side of described scanning pendulum len, for receiving the described pointolite laser of the non-imaged face reflection of described scanning pendulum len, generate scanning pendulum len rotational angle real-time position signal according to described pointolite laser, and be sent to described control circuit board;
Described control circuit board, be connected with described motor and described photoelectrical position sensor, for under the driving of the drive singal of described motor, synthesize according to the sawtooch sweep pendulum mirror reference signal that described scanning pendulum len rotational angle real-time position signal and described thermal imager based on linear IRFPA require, generate position error signal, and generate site error drive control signal through PID arithmetic, described site error drive control signal is sent to bandpass filter;
Described bandpass filter, is connected with described control circuit board and described motor, for carrying out notch filter and power amplification process to described site error drive control signal, generates the motor drive signal driving described motor;
Described motor is further used for: drive described scanning pendulum len to requiring position according to described motor drive signal.
2. scanner component as claimed in claim 1, it is characterized in that, described motor is: direct current generator.
3. scanner component as claimed in claim 1, it is characterized in that, described photoelectrical position sensor specifically comprises:
Photoelectric conversion module, for receiving the described pointolite laser of the non-imaged face reflection of described scanning pendulum len, be converted to electric signal to described pointolite laser from light signal, light spot position X1 and X2 of output point light source laser is to operational amplifier module;
Described operational amplifier module, for generating X1-X2 and X1+X2 two signals according to described light spot position signal X1 and X2, is input to special divider;
Described special divider, for generating scanning pendulum len rotational angle real-time position signal AC_POS according to X1-X2 signal and X1+X2 signal, and described AC_POS signal is sent to differentiating circuit, wherein, the angle that described AC_POS signal and described scanning pendulum len swing is linearly;
Described differentiating circuit, for according to described AC_POS signal production burst square-wave signal;
Optocoupler, inputs described control circuit board after being coupled by described pulse square wave signal.
4. scanner component as claimed in claim 3, it is characterized in that, described control circuit board specifically comprises:
FPGA, generates SPI communication command for the scanning position according to described scanning pendulum len, is sent to DA conversion chip;
Described DA conversion chip, controlling reference signal OUT_DA for generating sawtooch sweep according to described SPI communication command, carrying out amplifier conditioning and bias treatment to described OUT_DA signal, generates sawtooch sweep pendulum mirror reference signal WAVE_OUT.
The automatic adjustment module of PID, carries out ratio for receiving described WAVE_OUT signal and described AC_POS signal, integration and differentiation regulates, and the PID_NUM signal generated after regulating also is sent to operational amplifier;
Described operational amplifier, for carrying out scale amplifying and be sent to penetrating with circuit to described PID_NUM signal;
Describedly penetrating with circuit, for carrying out front stage isolation to the described PID_NUM signal after amplifying, generating site error drive control signal PID_OUT.
5. scanner component as claimed in claim 4, it is characterized in that, described bandpass filtering implement body comprises:
Power amplifier, for carrying out notch filter and power amplification process to described PID_OUT signal, generates the motor drive signal MOTOR+, the MOTOR-that drive described motor.
6. a scanning pendulum len control method, is characterized in that, for the scanner component according to any one of the claims 1 to 5, comprising:
Pointolite laser instrument is to the non-imaged surface launching pointolite laser of scanning pendulum len, and the pointolite laser reflection that pointolite laser instrument is launched by described scanning pendulum len is to photoelectrical position sensor;
Described photoelectrical position sensor receives the described pointolite laser of the non-imaged face reflection of described scanning pendulum len, generates scanning pendulum len rotational angle real-time position signal, and be sent to described control circuit board according to described pointolite laser;
Described control circuit board is under the driving of the drive singal of motor, synthesize according to the sawtooch sweep pendulum mirror reference signal that described scanning pendulum len rotational angle real-time position signal and described thermal imager based on linear IRFPA require, generate position error signal, and generate site error drive control signal through PID arithmetic, described site error drive control signal is sent to bandpass filter;
Described bandpass filter carries out notch filter and power amplification process to described site error drive control signal, generates the motor drive signal of drive motor;
Described motor drives described scanning pendulum len to requiring position according to described motor drive signal.
7. method as claimed in claim 6, it is characterized in that, described motor is: direct current generator.
8. method as claimed in claim 6, it is characterized in that, described photoelectrical position sensor receives the described pointolite laser of the non-imaged face reflection of described scanning pendulum len, generate scanning pendulum len rotational angle real-time position signal according to described pointolite laser, and be sent to described control circuit board and specifically comprise:
Photoelectric conversion module receives the described pointolite laser of the non-imaged face reflection of described scanning pendulum len, and be converted to electric signal to described pointolite laser from light signal, light spot position X1 and X2 of output point light source laser is to operational amplifier module;
Described operational amplifier module generates X1-X2 and X1+X2 two signals according to described light spot position signal X1 and X2, is input to special divider;
Described special divider generates scanning pendulum len rotational angle real-time position signal AC_POS according to X1-X2 signal and X1+X2 signal, and described AC_POS signal is sent to differentiating circuit, wherein, the angle that swings of described AC_POS signal and described scanning pendulum len linearly;
Described differentiating circuit is according to described AC_POS signal production burst square-wave signal;
Optocoupler inputs described control circuit board after being coupled by described pulse square wave signal.
9. method as claimed in claim 8, it is characterized in that, described control circuit board is under the driving of the drive singal of motor, synthesize according to the sawtooch sweep pendulum mirror reference signal that described scanning pendulum len rotational angle real-time position signal and described thermal imager based on linear IRFPA require, generate position error signal, and generate site error drive control signal through PID arithmetic, described site error drive control signal is sent to bandpass filtering implement body and comprises:
FPGA generates SPI communication command according to the scanning position of described scanning pendulum len, is sent to DA conversion chip;
Described DA conversion chip generates sawtooch sweep according to described SPI communication command and controls reference signal OUT_DA, carries out amplifier conditioning and bias treatment to described OUT_DA signal, generates sawtooch sweep pendulum mirror reference signal WAVE_OUT.
The automatic adjustment module of PID receives described WAVE_OUT signal and described AC_POS signal carries out ratio, integration and differentiation regulates, and generates the PID_NUM signal after regulating and is sent to operational amplifier;
Described operational amplifier carries out scale amplifying and is sent to penetrating with circuit to described PID_NUM signal;
Described penetrating carries out front stage isolation with circuit to the described PID_NUM signal after amplification, generates site error drive control signal PID_OUT.
10. method as claimed in claim 9, it is characterized in that, described bandpass filter carries out notch filter and power amplification process to described site error drive control signal, and the motor drive signal generating drive motor specifically comprises:
Power amplifier in described bandpass filter carries out notch filter and power amplification process to described PID_OUT signal, generates the motor drive signal MOTOR+, the MOTOR-that drive described motor.
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| CN201510930409.8A CN105404001A (en) | 2015-12-15 | 2015-12-15 | Scanner assembly and scanning oscillating mirror control method |
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| CN111811548A (en) * | 2020-07-20 | 2020-10-23 | 中国科学院长春光学精密机械与物理研究所 | Light source adjusting device of reflective image photoelectric encoder |
| CN112668354A (en) * | 2021-01-15 | 2021-04-16 | 苏州浩创信息科技有限公司 | Scanner and wearable intelligent device with same |
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