• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    Synchronous line-tracking robots based on STM 32?

    2013-02-08 09:59:22ZHUXiaoli朱曉莉LIShiguang李世光ZHANGKaiCHENYueyin陳曰印MENGQiangqiang孟強(qiáng)強(qiáng)

    ZHU Xiao-li(朱曉莉),LIShi-guang(李世光),ZHANG Kai(張 鍇),CHEN Yue-yin(陳曰印),MENG Qiang-qiang(孟強(qiáng)強(qiáng))

    (CollegeofInformationandElectricalEngineering,ShandongUniversityofScienceandTechnology,Qingdao 266590,China)

    Aline-tracking robot isa relatively common event of intelligent car com petition.Usually,it requires the robot to reach the finish line along the regulated path and the resultof the com petition is determined by the used tim e[1].For attending the robot contest in the 12th college students science and technology cu lture art festival of Shandong p rovince,a pair of synchronous line-tracking robots are designed.

    Fig.1 Playing field and size

    The rule of the competition is as follows:black skidproof adhesive tape is used to make up the path consisting of two parallel ellipses on a white foam board asshown in Fig.1.Two robots carrying asynchronous rod start to move from the starting line and walk along the track,respectively.The contest w ill be end up with the second arriving at the starting line.Any part of the rod is not allowed to touch the ground during the race.

    In this design,the rod and the sm all cars are fixed at both ends.The speeds of the rear-wheelm otors are ad justed by changing pulse-w idth modulation(PWM)values in real time.Besides,the angular disp lacement transducer is used to detect the relative position of the cars so that their speeds can be adjusted prom ptly.

    1 Overall structure and working princip le of control system

    Three-wheeled car body is adop ted.Two d riving wheels are installed on both sides in the rear.only one driven wheel is in the front,lying in the m idperpendicular of the two driving wheels.The advantage is that the touchdown of all the wheels can be guaranteed,so that none of the wheels hang in the air.Thus,the stable control can be realized[2].

    The contro l system structure of synchronous robo ts is shown in Fig.2.It ism ain ly com posed of a master controlmodule,a power module,a path detectionm odule,a relative position detection module,a controlmodule of the front-wheel servo and a driving module of the rear-wheelmotors,etc.

    Fig.2 System structure diagram

    Theworking principle of the system isas follows:The route condition is firstly detected by the reflective in frared photoelectric in the front of the cars.The real-time leaning judgment of the cars ismade after the analysis of the control part.Then,the angle of the servo m otor is adjusted so that the cars can veer.In this way,the cars can run along the preset path accurately.A t the same time,the speeds of the cars are controlled by the real-tim e ad justment of PWM values.Besides,the synchronous rod that the cars carry drives the angular disp lacement transducer to shift a corresponding angle.Thespeed of the inner car is then ad justed slightly after the data processing of the contro l part.Thus,the synchronous running of the two cars can be guaranteed.

    2 Hardware design

    2.1 Master control chip

    Main contro l chip is the core of thewho le design.It coordinates and contro ls all theWork of themodules and p lays a decisive role in the overall per formance of the system.Given the requirements of low power consumption,high performance and low cost,and considering thestability of thesystem,the number of peripherals resources on chip and som e other factors,the 32-bit m icroprocessor of STM 32 series STM 32F103ZEmade by STM icroelectronics is adopted as the main control chip.The advanced Cortex-M 3 ARM kernel is used inside every m icroprocessor of STM 32 series.All devices offer an extensive range of I/Os,three 12-bit ADCs,four general-purpose 16-bit tim ers p lus two PWM timers.with the operating voltage of 2.0-3.6 V,it has a series of power savingm odes to ensure the low power consum ption operation of the chip.Considering all the above,this chip can m eet the demands of high perform ance and low power consumption well.

    2.2 Path detection

    Seven reflective infrared photoelectric sensor ST188 and 2 quad operational amp lifiers LM 224 are used tom ake up the path detection module.The detection circuit is shown in Fig.3.Every sensor consists of an infrared lightem itting diode and a receiving transistor.When inf rared light is em itted to the playing field,w hite color absorbs few rays,and most rays are reflexed.The receiving transistor then switches into breakover w hen receives the reflexed in frared rays,and pin 7 of LM 224 in Fig.3 outputs high level.W hile black color absorbs many rays,only a few rays are reflexed and received by the receiving transistor.Asa result,the receiving transistor doesn't get to breakover,and pin 7 of LM 224 outputs low level.

    Fig.3 Reflective infrared photoelectric sensors path detection circuit

    As the difference in illumination intensity of the com petition field,aswell as that in fabrication process of the photoelectric sensors and some other factors,leakage current exists in receiving transistor.Thus,the accurate detection of the path is in fluenced.As a resu lt,the operational amp lifier LM 224 is used to equip the system with self-learning function.In this way,the environmental lights interference to photoelectric sensor can be elim inated and the resisting disturbance capacity of the system can be enhanced.In Fig.3,DAC0 is the given voltage com parison value which can be ad justed according to the site light condition.Thus,the light-adaptive line-tracking can be realized.

    Radial reach-out distance refers to the radial distance that the photoelectric sensors reach out from the front of the car.Theoretically,the longer the reach-out distance is,the better the situation w ill be.This is because for the unknown track,the earlier the situation in f ront is known,the faster the ad justment can be made.In this way,the cars can run along the route with the best strategy[3].Through experim ents,w hen the radial reach-out distance is fixed to about10 cm,the p rom pt and accurate turning can be ensured.

    2.3 Relative position detection

    Combined with the realtime control of the speeds of the cars in the program,angular disp lacement transducer is used to detect the relative position distance between the cars in real tim e to ensure the synchronism.

    Angular displacement sensor converts the mechanical angular displacem ent of the measured parts to electricity param eter with internal potentiom eter.M echanical angu lar disp lacement m akes m echanical structure inside the sensor to slide on the potentiometer.The corresponding electric signal is then output so that the angle can bem easured[4].

    One end of the synchronous rod is fastened to the shaft of the angular displacement sensor with a screw.The other end is fixed on the other robot car.The initial position of the angular disp lacement sensor should be regulated.As the cars running,the relative position distance between them is ref lected through the angular disp lacement sensor shaft.The distance is then converted to digital quantity through ADC.Real-tim e deviation rectification according to the num erical value is then conducted with the program.Thus,the synchronous running of the cars can be further assured.Synchronization control flow chart is shown in Fig.4.

    Fig.4 Synchronization control flow chart

    2.4 Control of front-wheel servo

    Servo motor is a kind of position servo driver.It is suitable for the control systems of which the angle changes continuously and needs to be held frontwheel servo.A servo is actually a position servo system com posed of a tiller,a reduction gear group,a position feedback potentiom eter,a DC motor and a control circuit.Through the internal position feedback,the output turning ang le of the tiller can be proportional to the given contro l signal.Thus,when the load torque is sm aller than the m axim um output torque,the output turning angle w ill be proportional to the given pulsew idth[6].

    The control signal of the servo motor is a pulse signal with a period of 20ms.Itshigh level lasts for 0.5-2.5 ms,with the corresponding control angle of 0-180°,and the relationship between them is linear.The corresponding control relationship is shown in Table 1.

    Table 1 Relationship between pulse high level durations and controlangles

    Contro l circuit of the servo is shown in Fig.5.

    Fig.5 Servom otor control circuit

    The veer of the cars are realized through the controlof the front-wheels servo motor and the different speees ad justment to the rear wheels in the program.

    2.5 Drivering of rear-wheelsmotors

    Two H-bridge driving circuitsare used in the drivering modu le of rear-wheel motors.An H-bridge structure,also named a who le bridge structure,has two half bridge drivers.It is com posed of fourm etal oxide semiconductor field-effect transistors(MOSFETs)[7].AO3400 and AO3401 MOSFETs are used in this design.As shown in Fig.6,when BG1 and BG2 sw itch into breakover,the current flow s from the power supp ly VCC through BG1 to the motor,and then down to the ground though BG2 f rom left to right.Thus,the m otor can be driven to run clockw ise.Sim ilarly,when BG1 and BG2 sw itch into breakover,the current flow s through the motor from right to left.Thus,them otor can be d riven to run anticlockw ise.

    The tim ers of STM 32 can generate PWM waves generally used in motor control and power electronics field.The outputvoltage is controlled with PWM technology by changing the pulse w idth.And the ch ange of output f requency can be achieved through ch anging the modu lation cycle of the pu lse.In this way,the needed wave,including the shape and amplitude,can be acquired equivalently[8].TIM 4 is used to produce PWM w aves to regulate the speeds of the motors.

    Fig.6 H-bridge d riving circuit diagram

    2.6 Power supply

    Two levelsof power supply are adopted.One uses seven rechargeable batteries of 1.2 V and the voltage regulator AMS1117 adjustable voltage output version to get 6 V,which powers them otors(6 V,646 r/m)and theservo(6 V,0.09 s/60°).The other uses the AMS1117 3.3 V fixed voltage output version to get 3.3 V from 6 V,which powers the STM 32 chip.

    3 Software design

    Based on the hardware circuit,the tested path information and running situation of the cars,it is available to realize the control of the servo and the motors with an information processing and control program.Thus,the cars can run along the track with high speed and good stability[9].

    The software control p rogram ism ainly com posed of ARM initialization,black and white calibration,track detection,steering contro l,speed control,synchronism control,finish line braking,etc.The control system software is realized in KeilμVision3 development environment programm ing with C language.

    Among the above,the turning control flow is shown in Fig.7.If the photoelectric sensor in the middle detects the black line,it show s that the car does not deviate from the track.The servo m otor w ill not turn,and the car w ill run in the largest given speed.If the photoelectric sensors on the left(or right)side detect the black line,it shows that the car deviates right(or left)f rom the track.And the more left(or right)the sensors detect the b lack line,the more the car deviates right(or left)from the track.Theservo motor is controlled to drive the car to turn left(or right).And themore the car deviates,the greater the deflection angle is given.

    Fig.7 Turning control flow chart

    4 Robot cars and playing field display

    This design has been made into material object and has actually been tested on the required p laying field.The results show that this kind of synchronous line-tracking robots can track the linewell.

    The synchronism can bewell realized and the synchronous rod w ill not d rop.The speed is sofast that the cars can run around the field for a round within seven seconds and stop as they get to the starting line again.Carsand playing field is shown in Fig.8.

    Fig.8 Cars and p laying field

    5 Conclusion

    For the robot contest,STM 32F103 m icroprocessor of STM 32 series is used to design a kind of synchronous line-tracking robots carrying a rod.Ref lective inf rared photoelectric sensor ST188 is used to track the line.Two H-bridge circuits are used to drive them otors.The direction of the cars is controlled by the turning of the servo motor and the speed adjustm ent of the rear w heels.The PWM technology and angular disp lacement transducer are used to guarantee the synchronicity of the two cars.Through experiments,the line-tracking robots can successfully run around the p laying field for a circle with a rod in a short tim e.The robots can track the linewellwith a high response speed.They also have a certain ornam ental value and practical application value.

    [1]LIU Yuan-m ing,LI Dao-lin,HAN X u-peng.Design and implemen tation of inductive line-tracking car.Electronic Design Engineering,2011,19(10):70-73.

    [2]WANG Zhi-Liang.M anufacture technology of competition robot.Beijing:Mechanical Industry Press,2007:58-70.

    [3]GAO Yue-hua.Design of smart car automatic tracing system based on the reflective in frared photoelectric sensor.Sem iconductor Op toe lec tronics,2009,30(1):134-145.

    [4]FAN Mao-jun.Sensor techno logy,the neuron of in formationalw eapons and equipm ents.Beijing:National Defence Industry Press,2008:45-47.

    [5]HUANG Zhi-w ei,SHUIMeng-ling,ZHANG Qiang,et al.ARM em bedded system app lication design and p ractice of the national undergraduate electronic design contest.Beijing Aeronautics and Astronautics University Press,Beijing,2011:116-117.

    [6]DUAN Y ing-kang.Hardw are design of smart line-tracking car based on MC9S12XS128MCU.Elec tronic Com ponent&Device App lications,2010,12(1):33-35.

    [7]LIU Long-ji,LI Shi-guang,GAO Zheng-zhong,et al.Design ofm obile robot line-tracking control system.Coal M ine Machinery,2009,30(7):124-126.

    [8]PENG Gang,QIN Zhi-qiang.App lication practice of embedded m icrocontroller based on ARM Cortex-M 3 STM 32 series.Beijing:Electronic Industry Press,2011:172-180.

    [9]ZHUO Qing,HUANG Kai-sheng,SHAO Bei-bei.Learn to make sm art cars,Challenge“Freescale” Cup.Beijing:Beijing Aeronautics and Astronautics university Press,2007:1-22.

    天天躁日日躁夜夜躁夜夜| 国产精品久久久久久人妻精品电影 | 国产精品九九99| 国产爽快片一区二区三区| 又黄又粗又硬又大视频| 多毛熟女@视频| bbb黄色大片| 亚洲五月婷婷丁香| 只有这里有精品99| 婷婷色综合大香蕉| 少妇人妻 视频| 国产一区二区在线观看av| 极品人妻少妇av视频| 制服诱惑二区| 一级毛片 在线播放| 色婷婷av一区二区三区视频| 脱女人内裤的视频| 狠狠精品人妻久久久久久综合| 欧美黑人欧美精品刺激| 欧美日韩成人在线一区二区| 我的亚洲天堂| 纯流量卡能插随身wifi吗| 深夜精品福利| 操出白浆在线播放| 精品国产国语对白av| 久久久久久人人人人人| 美女高潮到喷水免费观看| 国产精品一国产av| 亚洲情色 制服丝袜| 一边摸一边做爽爽视频免费| 亚洲,欧美,日韩| 大香蕉久久成人网| 亚洲精品久久午夜乱码| 国产黄色视频一区二区在线观看| 精品一品国产午夜福利视频| 这个男人来自地球电影免费观看| svipshipincom国产片| 亚洲精品日本国产第一区| 亚洲 国产 在线| 久久久久精品人妻al黑| 女警被强在线播放| √禁漫天堂资源中文www| 国产老妇伦熟女老妇高清| 亚洲伊人色综图| videosex国产| 亚洲免费av在线视频| 国产成人精品久久二区二区免费| 久久精品国产a三级三级三级| 国产精品九九99| 操出白浆在线播放| 亚洲精品国产av成人精品| 亚洲图色成人| 香蕉丝袜av| 18禁裸乳无遮挡动漫免费视频| 91九色精品人成在线观看| 亚洲av在线观看美女高潮| 国产精品.久久久| 最黄视频免费看| 日本av手机在线免费观看| 妹子高潮喷水视频| 女人久久www免费人成看片| av福利片在线| 亚洲国产欧美网| 99久久人妻综合| 90打野战视频偷拍视频| 国产一区亚洲一区在线观看| 在现免费观看毛片| 熟女av电影| 超色免费av| 亚洲情色 制服丝袜| 国产无遮挡羞羞视频在线观看| 亚洲国产精品999| 欧美日韩成人在线一区二区| 99国产精品99久久久久| 国产在线观看jvid| 国产黄色免费在线视频| 久久青草综合色| 欧美日韩亚洲高清精品| 国产高清不卡午夜福利| 一本—道久久a久久精品蜜桃钙片| 欧美人与性动交α欧美软件| 热99久久久久精品小说推荐| av福利片在线| 99国产精品一区二区三区| 美女午夜性视频免费| 大型av网站在线播放| 国产男女内射视频| 老汉色∧v一级毛片| 99re6热这里在线精品视频| 麻豆国产av国片精品| 亚洲色图综合在线观看| 欧美精品高潮呻吟av久久| 在线看a的网站| 国产男女内射视频| 一区二区三区激情视频| 日韩,欧美,国产一区二区三区| 又大又黄又爽视频免费| 日韩免费高清中文字幕av| 国产真人三级小视频在线观看| 国产成人精品久久二区二区91| 欧美中文综合在线视频| 老汉色∧v一级毛片| 日韩熟女老妇一区二区性免费视频| 久久久精品国产亚洲av高清涩受| 色婷婷久久久亚洲欧美| 免费在线观看完整版高清| 后天国语完整版免费观看| 黑人欧美特级aaaaaa片| 天天躁夜夜躁狠狠躁躁| 男女下面插进去视频免费观看| 国产精品欧美亚洲77777| 一级黄片播放器| 一本一本久久a久久精品综合妖精| 制服诱惑二区| 超碰成人久久| a级片在线免费高清观看视频| 欧美成狂野欧美在线观看| 啦啦啦视频在线资源免费观看| 老熟女久久久| 亚洲国产欧美一区二区综合| 国精品久久久久久国模美| 精品人妻1区二区| 51午夜福利影视在线观看| 午夜久久久在线观看| 国产亚洲av高清不卡| 十八禁网站网址无遮挡| 一本色道久久久久久精品综合| 女性被躁到高潮视频| 热99久久久久精品小说推荐| 极品人妻少妇av视频| 五月天丁香电影| 国产一卡二卡三卡精品| 观看av在线不卡| 国产免费一区二区三区四区乱码| 久热这里只有精品99| 亚洲一码二码三码区别大吗| 色婷婷av一区二区三区视频| 亚洲免费av在线视频| 搡老乐熟女国产| 国产精品久久久久成人av| 国产淫语在线视频| 欧美日韩福利视频一区二区| 无限看片的www在线观看| 久久精品aⅴ一区二区三区四区| 十八禁人妻一区二区| 国精品久久久久久国模美| 午夜福利视频在线观看免费| 免费高清在线观看视频在线观看| 一区二区三区乱码不卡18| 男女无遮挡免费网站观看| 国产精品偷伦视频观看了| 免费一级毛片在线播放高清视频 | 亚洲精品成人av观看孕妇| 人人妻人人爽人人添夜夜欢视频| 成年女人毛片免费观看观看9 | 满18在线观看网站| xxxhd国产人妻xxx| 午夜影院在线不卡| 欧美精品一区二区免费开放| 五月天丁香电影| 国产伦理片在线播放av一区| 在线av久久热| 亚洲熟女毛片儿| 久久久国产精品麻豆| 可以免费在线观看a视频的电影网站| 一级黄色大片毛片| 成在线人永久免费视频| 久久久精品94久久精品| 99久久人妻综合| 欧美在线一区亚洲| 美女福利国产在线| 18禁国产床啪视频网站| 日韩制服骚丝袜av| 日韩中文字幕欧美一区二区 | 欧美日韩精品网址| 色网站视频免费| 亚洲国产中文字幕在线视频| 国产真人三级小视频在线观看| 久久久亚洲精品成人影院| 亚洲 欧美一区二区三区| 丝袜喷水一区| 婷婷色综合大香蕉| 久久国产精品影院| 肉色欧美久久久久久久蜜桃| 国产人伦9x9x在线观看| 男女午夜视频在线观看| 波多野结衣一区麻豆| 一本久久精品| 日韩,欧美,国产一区二区三区| 狂野欧美激情性xxxx| 国产精品国产三级国产专区5o| 大香蕉久久网| 亚洲国产欧美在线一区| 亚洲专区中文字幕在线| 国产精品国产三级专区第一集| 男男h啪啪无遮挡| 无遮挡黄片免费观看| 日韩大码丰满熟妇| 99国产精品一区二区三区| 欧美黑人欧美精品刺激| 自拍欧美九色日韩亚洲蝌蚪91| 亚洲中文字幕日韩| 永久免费av网站大全| 久久青草综合色| 精品一区二区三卡| 极品人妻少妇av视频| 一级黄片播放器| 国产av精品麻豆| 欧美大码av| 国产日韩欧美亚洲二区| 大香蕉久久成人网| 曰老女人黄片| 看十八女毛片水多多多| 精品一区二区三区av网在线观看 | 99国产精品一区二区三区| 男女床上黄色一级片免费看| 精品欧美一区二区三区在线| 国产欧美日韩一区二区三区在线| 一级片免费观看大全| 国产成人a∨麻豆精品| 国产精品香港三级国产av潘金莲 | 美女午夜性视频免费| 观看av在线不卡| 亚洲一区中文字幕在线| 成人亚洲欧美一区二区av| 激情五月婷婷亚洲| 国产精品久久久av美女十八| 菩萨蛮人人尽说江南好唐韦庄| 亚洲欧美日韩另类电影网站| 精品久久久久久久毛片微露脸 | 少妇猛男粗大的猛烈进出视频| h视频一区二区三区| 黄色片一级片一级黄色片| 国产黄色视频一区二区在线观看| 男女之事视频高清在线观看 | 少妇被粗大的猛进出69影院| 国产男人的电影天堂91| 国产高清视频在线播放一区 | 国产精品欧美亚洲77777| 成人国产一区最新在线观看 | 伊人久久大香线蕉亚洲五| 美女大奶头黄色视频| 9191精品国产免费久久| 国产精品九九99| 伦理电影免费视频| 国产淫语在线视频| 精品久久蜜臀av无| videos熟女内射| 国产精品一国产av| 欧美成人午夜精品| 一级片免费观看大全| 国产免费一区二区三区四区乱码| 九草在线视频观看| 午夜免费鲁丝| 国产又色又爽无遮挡免| 啦啦啦在线观看免费高清www| 少妇粗大呻吟视频| 欧美日韩成人在线一区二区| 一二三四在线观看免费中文在| 亚洲人成77777在线视频| 久久热在线av| 亚洲精品久久成人aⅴ小说| 日韩一卡2卡3卡4卡2021年| 亚洲欧美激情在线| 日韩av不卡免费在线播放| 人妻人人澡人人爽人人| 视频区欧美日本亚洲| 成人影院久久| 午夜福利一区二区在线看| e午夜精品久久久久久久| 欧美亚洲日本最大视频资源| 超色免费av| a级毛片黄视频| 欧美日韩综合久久久久久| 亚洲情色 制服丝袜| 精品视频人人做人人爽| av又黄又爽大尺度在线免费看| 久久人人97超碰香蕉20202| 婷婷色麻豆天堂久久| 亚洲精品国产av成人精品| 国产欧美亚洲国产| 亚洲欧美日韩高清在线视频 | 国产精品麻豆人妻色哟哟久久| 中文字幕人妻熟女乱码| 黄色 视频免费看| 日韩av在线免费看完整版不卡| 一本综合久久免费| 叶爱在线成人免费视频播放| netflix在线观看网站| 一二三四社区在线视频社区8| 免费久久久久久久精品成人欧美视频| 巨乳人妻的诱惑在线观看| 亚洲伊人久久精品综合| 亚洲伊人色综图| 观看av在线不卡| 建设人人有责人人尽责人人享有的| 高清黄色对白视频在线免费看| 大片免费播放器 马上看| 在线精品无人区一区二区三| 久久综合国产亚洲精品| 久久亚洲国产成人精品v| 午夜激情久久久久久久| 国产又爽黄色视频| 桃花免费在线播放| av天堂在线播放| 99香蕉大伊视频| 亚洲熟女毛片儿| 一级片免费观看大全| 日本欧美国产在线视频| 51午夜福利影视在线观看| 精品国产国语对白av| 19禁男女啪啪无遮挡网站| 黑人欧美特级aaaaaa片| 亚洲男人天堂网一区| 精品一区在线观看国产| 国产av一区二区精品久久| 色综合欧美亚洲国产小说| 日本91视频免费播放| 日本一区二区免费在线视频| 久久久久久人人人人人| 99热国产这里只有精品6| 性色av一级| 日韩av不卡免费在线播放| 成年人午夜在线观看视频| 99国产综合亚洲精品| 99国产精品99久久久久| 久久女婷五月综合色啪小说| 午夜日韩欧美国产| 免费高清在线观看日韩| 91九色精品人成在线观看| 亚洲成色77777| 一区二区三区四区激情视频| 九草在线视频观看| 免费在线观看日本一区| 国产一区二区三区综合在线观看| 久久99热这里只频精品6学生| 欧美黄色片欧美黄色片| 黑人欧美特级aaaaaa片| 亚洲精品美女久久久久99蜜臀 | 午夜免费男女啪啪视频观看| 欧美中文综合在线视频| 国产亚洲av片在线观看秒播厂| 超色免费av| 欧美 亚洲 国产 日韩一| 美女高潮到喷水免费观看| 久久99精品国语久久久| 亚洲熟女毛片儿| 亚洲九九香蕉| 亚洲国产欧美网| 亚洲精品一二三| 美女扒开内裤让男人捅视频| 涩涩av久久男人的天堂| 日韩制服骚丝袜av| www.自偷自拍.com| 日本一区二区免费在线视频| 悠悠久久av| 丝袜人妻中文字幕| 一二三四在线观看免费中文在| 亚洲一码二码三码区别大吗| 校园人妻丝袜中文字幕| 国产精品二区激情视频| 国产精品一区二区在线不卡| 日韩电影二区| 2018国产大陆天天弄谢| 亚洲国产毛片av蜜桃av| 国产成人免费观看mmmm| 欧美+亚洲+日韩+国产| 欧美日韩视频精品一区| 亚洲av综合色区一区| 纵有疾风起免费观看全集完整版| 不卡av一区二区三区| 久久久国产精品麻豆| 一级毛片女人18水好多 | 亚洲国产中文字幕在线视频| av在线老鸭窝| 精品国产一区二区久久| 中文字幕制服av| 国产精品成人在线| 建设人人有责人人尽责人人享有的| 亚洲黑人精品在线| 一本综合久久免费| 欧美激情高清一区二区三区| 女人爽到高潮嗷嗷叫在线视频| 久久鲁丝午夜福利片| 国产亚洲午夜精品一区二区久久| 日韩电影二区| 大码成人一级视频| 美女中出高潮动态图| 爱豆传媒免费全集在线观看| 97在线人人人人妻| 99热网站在线观看| 日本五十路高清| 亚洲欧洲国产日韩| 自线自在国产av| 别揉我奶头~嗯~啊~动态视频 | 精品人妻1区二区| 欧美人与性动交α欧美精品济南到| 国产亚洲av高清不卡| 国产精品 国内视频| 精品高清国产在线一区| 亚洲精品美女久久av网站| 国产一区二区 视频在线| 美女中出高潮动态图| 熟女少妇亚洲综合色aaa.| 男女午夜视频在线观看| 成人国产av品久久久| 一级,二级,三级黄色视频| 中文字幕精品免费在线观看视频| 精品久久久久久久毛片微露脸 | 久久久久精品国产欧美久久久 | 老汉色av国产亚洲站长工具| 美女福利国产在线| 少妇裸体淫交视频免费看高清 | 久久久久久人人人人人| 亚洲av男天堂| 国产淫语在线视频| 国产日韩一区二区三区精品不卡| 看免费成人av毛片| 亚洲国产最新在线播放| 交换朋友夫妻互换小说| 国产视频一区二区在线看| 国产精品成人在线| 韩国精品一区二区三区| 中文精品一卡2卡3卡4更新| 国产av一区二区精品久久| 黑人欧美特级aaaaaa片| 久久精品人人爽人人爽视色| av不卡在线播放| 国产成人精品无人区| 久久国产精品影院| 中文字幕人妻熟女乱码| 精品亚洲成a人片在线观看| 国产男人的电影天堂91| 熟女av电影| 亚洲,一卡二卡三卡| 亚洲人成77777在线视频| 我要看黄色一级片免费的| 亚洲黑人精品在线| 韩国高清视频一区二区三区| 午夜老司机福利片| 国产真人三级小视频在线观看| 丰满人妻熟妇乱又伦精品不卡| 欧美97在线视频| 免费不卡黄色视频| 波多野结衣av一区二区av| 国产激情久久老熟女| 久久久国产欧美日韩av| 两人在一起打扑克的视频| 久久久国产欧美日韩av| 国产精品秋霞免费鲁丝片| 久久久久久久大尺度免费视频| 日韩一卡2卡3卡4卡2021年| 日韩视频在线欧美| 欧美大码av| 国产精品九九99| 午夜福利影视在线免费观看| 天天躁夜夜躁狠狠久久av| 国产成人精品久久二区二区免费| 国产一区二区三区综合在线观看| 一级片'在线观看视频| 成年av动漫网址| 日韩av在线免费看完整版不卡| 国产精品熟女久久久久浪| 国产精品av久久久久免费| 国产成人a∨麻豆精品| 久久人妻熟女aⅴ| 水蜜桃什么品种好| 别揉我奶头~嗯~啊~动态视频 | 久久人妻福利社区极品人妻图片 | 精品国产乱码久久久久久小说| 国产野战对白在线观看| 国产精品欧美亚洲77777| www.999成人在线观看| 久久精品国产综合久久久| 大话2 男鬼变身卡| 激情视频va一区二区三区| 国产精品秋霞免费鲁丝片| 日韩视频在线欧美| 50天的宝宝边吃奶边哭怎么回事| 亚洲人成77777在线视频| 亚洲欧美中文字幕日韩二区| 久9热在线精品视频| 在线观看人妻少妇| 男女高潮啪啪啪动态图| 成人免费观看视频高清| 国产精品久久久久久精品电影小说| 在线观看免费日韩欧美大片| 十八禁高潮呻吟视频| 国产男女内射视频| 国产欧美亚洲国产| 久久久久网色| 成年人黄色毛片网站| 亚洲少妇的诱惑av| 亚洲精品国产色婷婷电影| 国产三级黄色录像| 免费日韩欧美在线观看| 两性夫妻黄色片| 精品亚洲成a人片在线观看| 男女国产视频网站| 五月开心婷婷网| 在线 av 中文字幕| 后天国语完整版免费观看| 日本91视频免费播放| 国产高清国产精品国产三级| 99香蕉大伊视频| 波多野结衣av一区二区av| 在线观看国产h片| 五月开心婷婷网| 国产片特级美女逼逼视频| 亚洲色图 男人天堂 中文字幕| 精品亚洲成国产av| 日韩大片免费观看网站| videos熟女内射| 熟女av电影| 色综合欧美亚洲国产小说| 好男人电影高清在线观看| 少妇人妻 视频| 亚洲国产欧美日韩在线播放| bbb黄色大片| tube8黄色片| 日韩av免费高清视频| 18禁国产床啪视频网站| 国产精品av久久久久免费| 啦啦啦视频在线资源免费观看| 国产欧美亚洲国产| 91精品国产国语对白视频| 欧美人与善性xxx| 天堂8中文在线网| 久久av网站| 精品一区二区三区av网在线观看 | 视频区图区小说| 亚洲精品一区蜜桃| 在线av久久热| 欧美在线黄色| 丰满人妻熟妇乱又伦精品不卡| 亚洲成人国产一区在线观看 | 在线精品无人区一区二区三| 午夜免费鲁丝| 国产在线免费精品| 99久久99久久久精品蜜桃| 人体艺术视频欧美日本| 高清欧美精品videossex| 性色av乱码一区二区三区2| 欧美性长视频在线观看| 伊人亚洲综合成人网| 侵犯人妻中文字幕一二三四区| 只有这里有精品99| 丰满饥渴人妻一区二区三| 免费在线观看黄色视频的| 久久精品aⅴ一区二区三区四区| 少妇猛男粗大的猛烈进出视频| 亚洲国产欧美一区二区综合| 亚洲av成人不卡在线观看播放网 | 久久人人爽人人片av| 亚洲av男天堂| 中文字幕人妻丝袜一区二区| 色婷婷久久久亚洲欧美| 久久精品久久久久久噜噜老黄| 人妻 亚洲 视频| 99久久99久久久精品蜜桃| 嫁个100分男人电影在线观看 | 久久国产精品人妻蜜桃| 欧美xxⅹ黑人| 狠狠精品人妻久久久久久综合| 国产精品欧美亚洲77777| 精品久久久久久久毛片微露脸 | 男女午夜视频在线观看| 久久综合国产亚洲精品| 久久99一区二区三区| 午夜精品国产一区二区电影| 免费av中文字幕在线| 波野结衣二区三区在线| 亚洲熟女毛片儿| 精品久久蜜臀av无| 五月开心婷婷网| 99热全是精品| av又黄又爽大尺度在线免费看| www.av在线官网国产| 久久久久国产精品人妻一区二区| 亚洲av男天堂| 精品人妻熟女毛片av久久网站| 欧美日韩精品网址| 亚洲国产av新网站| 欧美黑人欧美精品刺激| 曰老女人黄片| 性少妇av在线| 99国产精品免费福利视频| 成年人午夜在线观看视频| 国产精品秋霞免费鲁丝片| 欧美黄色片欧美黄色片| 美女国产高潮福利片在线看| 日本wwww免费看| 亚洲精品一二三| 欧美精品啪啪一区二区三区 | 国产精品 欧美亚洲| 久久中文字幕一级| 国产高清视频在线播放一区 | 久久精品久久久久久久性| 久久久久国产一级毛片高清牌| 性高湖久久久久久久久免费观看| 国产亚洲av高清不卡| 大码成人一级视频| 色94色欧美一区二区| 一区二区三区激情视频| 一边亲一边摸免费视频| 成在线人永久免费视频| 亚洲国产欧美日韩在线播放| 男女高潮啪啪啪动态图| 性色av乱码一区二区三区2| 亚洲 国产 在线| 人人澡人人妻人| 久久久久久久久久久久大奶| 在线观看人妻少妇| 国产免费视频播放在线视频| 丝袜人妻中文字幕|