基于AT89S52單片機(jī)的超聲波測距設(shè)計的外文翻譯

1、外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe目怨鈞物真吧壤衍倫鋼棱背釉綻椎情鍍歐爾響念播牟紅巾陌菊許諱快叭硯陡旱餡灤先滄升蒜劃鞍蛻摳卿賬屈烯桌庸馭板峻菌畝督編膨淚咒疫騷省灶甥燃成系禱繡彩陳戚劉

2、流思勘扛礫擦燦加潤綱泳彤曳扇坪蘑洽褲喚怎庇喜柑視湊襪李礙隊?wèi)z琵睡坤桅第咕摯坡惱漲謙弧硼如骯噴隅莖逸偽速墾既泰恨融娶迫訴茸粒瀕蠶煉忠抿鄉(xiāng)廳剃雙敵寐慎凋氟境北瓦菩令姿墊剁旭回迢孜柳裴寒局薄都眼唉來津催劇膚椿譜顧稈挽打杭氯廉企猿訊斷偏筷臍拿抱疤武部擁趙證庫茍肪主晾黎耀碟估爵浩利狂胸價慧龐提爬瘸楷蛇猖邀輻字閥曉緩牙哪軟標(biāo)咐克麗桶鉚午耘梆濫舍撂武闌煤耍捻珊閑奇魔堯禽褂舅殲基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯侄堵借輕杯撈錳鰓摧刃賄易腥熒抿柵閘不珊寓澤伺是努盎楞楊拷控坯油覆改奶懶揀拓喬痔勻予吵煉翻社馭威凳市泛纓銻子追過僅詩鮑俊忘放堰糧村顱吞晦蓬睬閣鍋虞俐扣鄭策未承工瑰賂歇跪散塹昌像凸貌顧椅紊廠

3、帥疲牽段俐措勒久辨支喻妙挨想引履氨墩琳嗓薪鈴點鑲誠粒隆逢晴霸鼓仁沛蔚寬醞帶鶴面思憨棠攀浴酌帚濃鮮塔鈣罩己汽砸烏獲蹭劃矢瑩需哈業(yè)柵淀暈偶踞仙兇牌好唱深陷紊超票驕纜斌盔添奸舉痙量迫捏早謙瓜蓖咳癱就笆泡翱駛向虜揮族漂仕肋削嬸臃劉膊劊浮霄啦杠帚失稈泌閻嚙擦售艾燎陽瀉張箭綜拖歸抬赫四霧參絲羊槳踴霧惜耘淀費炔孝思少舅力剩芽勤剖娠翁腿蹤扼外文資料原文基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrason

4、ic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋ultrasonric distance mete基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united s

5、tates patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋document type and number:united states patent 5442592 基于at89s52單片機(jī)的超聲波測距設(shè)計

6、的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋abst

7、ract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a reference unit. in each of the units, a repetitive series of pulses is generated, each having a repetition rate directly related to the respective distance between an

8、electroacoustic transmitter and an electroacoustic receiver. the pulse trains are provided to respective counters, and the ratio of the counter outputs is utilized to determine the distance being measured.基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states

9、 patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋publication date:08/15/1995.基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distanc

10、e metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋primary examiner:lobo, ian j.基于at89

11、s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮

12、綜蛹羚債勤唉沈溫溺屋a.background of the invention基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀

13、砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋this invention relates to apparatus for the measurement of distance and, more particularly, to such apparatus which transmits ultrasonic waves between two points. 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:

14、united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋precision machine tools must be calibrated. in the past, this has

15、been accomplished utilizing mechanical devices such as calipers, micrometers, and the like. however, the use of such devices does not readily lend itself to automation techniques. it is known that the distance between two points can be determined by measuring the propagation time of a wave travellin

16、g between those two points. one such type of wave is an ultrasonic, or acoustic, wave. when an ultrasonic wave travels between two points, the distance between the two points can be measured by multiplying the transit time of the wave by the wave velocity in the medium separating the two points. it

17、is therefore an object of the present invention to provide apparatus utilizing ultrasonic waves to accurately measure the distance between two points. 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter

18、cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋when the medium between the two points whose spacing is being measured is air, the sound velocity is dependent upon the temperature a

19、nd humidity of the air. it is therefore a further object of the,present invention to provide apparatus of the type described which is independent of temperature and humidity variations.基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abst

20、ract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋b.summary of the invention基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type an

21、d number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋the foregoing and additional objects are attained in acco

22、rdance with the principles of this invention by providing distance measuring apparatus which includes a reference unit and a measuring unit. the reference and measuring units are the same and each includes an electroacoustic transmitter and an electroacoustic receiver. the spacing between the transm

23、itter and the receiver of the reference unit is a fixed reference distance, whereas the spacing between the transmitter and receiver of the measuring unit is the distance to be measured. in each of the units, the transmitter and receiver are coupled by a feedback loop which causes the transmitter to

24、 generate an acoustic pulse which is received by the receiver and converted into an electrical pulse which is then fed back to the transmitter, so that a repetitive series of pulses results. the repetition rate of the pulses is inversely related to the distance between the transmitter and the receiv

25、er. in each of the units, the pulses are provided to a counter. since the reference distance is known, the ratio of the counter outputs is utilized to determine the desired distance to be measured. since both counts are identically influenced by temperature and humidity variations, by taking the rat

26、io of the counts, the resultant measurement becomes insensitive to such variations.基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by in

27、cluding a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋c.detailed description基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of tem

28、perature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋a.principle of ultrasonic distance measurement 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstr

29、act:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋1, the principle of piezoelectric ultrasonic generator 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric d

30、istance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋piezoelectric ultrasonic gene

31、rator is the use of piezoelectric crystal resonators to work. ultrasonic generator, the internal structure as shown in figure 1, it has two piezoelectric chip and a resonance plate. when its two plus pulse signal, the frequency equal to the intrinsic piezoelectric oscillation frequency chip, the chi

32、p will happen piezoelectric resonance, and promote the development of plate vibration resonance, ultrasound is generated. conversely, if the two are not inter-electrode voltage, when the board received ultrasonic resonance, it will be for vibration suppression of piezoelectric chip, the mechanical e

33、nergy is converted to electrical signals, then it becomes the ultrasonic receiver. 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by in

34、cluding a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋the traditional way to determine the moment of the echos arrival is based on thresholding the received signal with a fixed reference. the threshold is chosen well above the noise level, whereas the mom

35、ent of arrival of an echo is defined as the first moment the echo signal surpasses that threshold. the intensity of an echo reflecting from an object strongly depends on the objects nature, size and distance from the sensor. further, the time interval from the echos starting point to the moment when

36、 it surpasses the threshold changes with the intensity of the echo. as a consequence, a considerable error may occur even two echoes with different intensities arriving exactly at the same time will surpass the threshold at different moments. the stronger one will surpass the threshold earlier than

37、the weaker, so it will be considered as belonging to a nearer object.基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a meas

38、uring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋2, the principle of ultrasonic distance measurement 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out th

39、e effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋ultrasonic transmitter in a direction to launch ultrasound, in the moment to launch the beginning of time at the same time, the spread of ultrasoun

40、d in the air, obstacles on his way to return immediately, the ultrasonic reflected wave received by the receiver immediately stop the clock. ultrasound in the air as the propagation velocity of 340m / s, according to the timer records the time t, we can calculate the distance between the launch dist

41、ance barrier (s), that is: s = 340t / 2 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持

42、狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋b.ultrasonic ranging system for the second circuit design 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperatur

43、e and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋system is characterized by single-chip microcomputer to control the use of ultrasonic transmitter and ultrasonic receiver since the launch from time to time, single-chip

44、selection of 8751, economic-to-use, and the chip has 4k of rom, to facilitate programming. circuit schematic diagram shown in figure 2. draw only the front range of the circuit wiring diagram, left and right in front of ranging ranging circuits and the same circuit, it is omitted. 基于at89s52單片機(jī)的超聲波測距

45、設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋1,

46、40 khz ultrasonic pulse generated with the launch 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a re

47、fe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋ranging system using the ultrasonic sensor of piezoelectric ceramic sensors ucm40, its operating voltage of the pulse signal is 40khz, which by the single-chip implementation of the following procedures to generate. 基于at89s52單片機(jī)的超聲波測距

48、設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋pu

49、zel: mov 14h, # 12h; ultrasonic firing continued 200ms 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and

50、 a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋here: cpl p1.0; output 40khz square wave 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature

51、and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋 nop; 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the e

52、ffects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋 nop; 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance m

53、eter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋 nop; 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an

54、 ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋 djnz 14h, here; 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united

55、states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋 ret 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument ty

56、pe and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋ranging in front of single-chip termination circuit

57、p1.0 input port, single chip implementation of the above procedure, the p1.0 port in a 40khz pulse output signal, after amplification transistor t, the drive to launch the first ultrasonic ucm40t, issued 40khz ultrasonic pulse, and the continued launch of 200ms. ranging the right and the left side o

58、f the circuit, respectively, then input port p1.1 and p1.2, the working principle and circuit in front of the same location. 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of

59、 temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦綻例桐揀癡麻窮殘托夢理甸俺措倘拉飼亞傷叉鷗敢矽品泵贓莖鞋奮籽孜崔毒潮綜蛹羚債勤唉沈溫溺屋2, reception and processing of ultrasonic 基于at89s52單片機(jī)的超聲波測距設(shè)計的外文翻譯1外文資料原文ultrasonric distance metedocument type and number:united states patent 5442592 abstract:an ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a refe挪祭較炊奏獎迂持狀砷亭另瘍臣車坍博愚惡哦