毕业设计：基于单片机的电子秤系统设计.doc

¹²49Ò³£¬×ÖÊý×ܼƣº22628
»ùÓÚµ¥Æ¬»úµÄµç×Ó³ÓÉè¼Æ

Õª Òª

Ëæ×Å΢µç×Ó¼¼ÊõµÄÓ¦Óã¬Êг¡ÉÏʹÓõĴ«Í³³ÆÖع¤¾ßÒѾ­Âú×ã²»ÁËÈËÃǵÄÒªÇó¡£ÎªÁ˸ı䴫ͳ³ÆÖع¤¾ßÔÚʹÓÃÉÏ´æÔÚµÄÎÊÌ⣬ÔÚ±¾Éè¼ÆÖн«ÖÇÄÜ»¯¡¢×Ô¶¯»¯¡¢ÈËÐÔ»¯ÓÃÔÚÁ˵ç×Ó³ÓÖصĿØÖÆϵͳÖС£±¾ÏµÍ³Ö÷ÒªÓɵ¥Æ¬»úÀ´¿ØÖÆ£¬²âÁ¿ÎïÌåÖØÁ¿²¿·ÖÓɳÆÖØ´«¸ÐÆ÷¼°A/Dת»»Æ÷×é³É£¬¼ÓÉÏÏÔʾµ¥Ôª£¬¹ýÔر¨¾¯£¬µÍµçѹ×Ô¶¯¹Ø»úµÈ¡£´Ëµç×ӳӾ㱸Á˹¦ÄܶࡢËÙÂʸߡ¢×¼È·¶È¸ß¡¢Îȶ¨ÐԸߡ¢¿É¿¿ÐԸߡ¢ÐÔÄܼ۸ñ±È¸ß¡¢¹¦ºÄµÍ¡¢ÏµÍ³Éè¼Æ¼òµ¥¡¢Ê¹Ó÷½±ãÖ±¹Û¡¢Ëٶȿ졢²âÁ¿×¼È·¡¢×Ô¶¯»¯³Ì¶È¸ßµÈÌص㡣
±¾ÏµÍ³ÒÔAT89S52µ¥Æ¬»úΪÖ÷¿ØоƬ£¬ÍâΧ¸½ÒÔ³ÆÖصç·¡¢ÏÔʾµç·¡¢±¨¾¯µç·¡¢¼üÅ̵緵ȹ¹³ÉÖÇÄ@@ÆÖØϵͳµç·°å£¬´Ó¶øʵÏÖ×Ô¶¯³ÆÖØϵͳµÄ¸÷ÖÖ¿ØÖƹ¦ÄÜ¡£¿ÉÒÔ˵,´ËÉè¼ÆËùÍê³ÉµÄµç×ӳӺܴó³Ì¶ÈÉÏÂú×ãÁËÓ¦ÓÃÐèÇó¡£

¹Ø¼ü´Ê µ¥Æ¬»ú£¬³ÆÖØ´«¸ÐÆ÷£¬A/Dת»»Æ÷£¬LCDÏÔʾÆ÷
THE ELECTRONIC SCALE DESIGN BASED ON MICROCONTROLLER

ABSTRACT

With the application of micro-electronics technology, tradition ponderation instrument used in market has been not satisfaction with hunman requirements already. In order to make up for the traditional apparatus shortcoming, we improve the apparatus's control system with intelligence and automation. This system is mainly controlled by microcontroller, the section of height measurement accomplish by supersonic sensor, the section of weight measurement accomplish by weight sensor and A/D transformer, this apparatus have many characteristic such as having more function, consume less energy, small and move easily, low price, measure precisely, the speed is quick, automatic work without people and so on.
The system is mainly controlled by the microcontroller AT89S52, the periphery is consist of the circuit of clock and calendar, the circuit of measure height and weight, the circuit of display and print, all of these comprise the circuit board of the intelligent apparatus of height and weight. It can achieve all function of the apparatus.


KEYWORDS: microcontroller£¬ponderation¨Csensor£¬A/D converter£¬LCDdisplay
Ä¿¡¡Â¼

Ç°¡¡ÑÔ 1
µÚ1Õ ¸ÅÊö 2
1.1 ³ÆÖؼ¼ÊõºÍºâÆ÷µÄ·¢Õ¹ 2
1.2 µç×Ó³ÓµÄ×é³É 3
1.2.1 µç×ӳӵĻù±¾½á¹¹ 3
1.2.2 µç×ӳӵŤ×÷Ô­Àí 3
1.2.3 µç×ӳӵļÆÁ¿ÐÔÄÜ 4
1.2.4 µç×ӳӵŦÄܼ°¼¼ÊõÖ¸±ê 4
1.3 Éè¼Æ˼· 5
µÚ2Õ ϵͳ·½°¸ÂÛÖ¤ÓëÑ¡ÐÍ 6
2.1 ¿ØÖÆÆ÷²¿·Ö 6
2.2 Êý¾Ý²É¼¯²¿·Ö 7
2.2.1 ´«¸ÐÆ÷µÄÑ¡Ôñ 7
2.2.2 ·Å´óµç·ѡÔñ 9
2.2.3 A/Dת»»Æ÷µÄÑ¡Ôñ 11
2.2.4 ¼üÅÌ´¦Àí²¿·Ö·½°¸ÂÛÖ¤ 11
µÚ3Õ Ӳ¼þµç·Éè¼Æ 13
3.1 AT89S52µÄ×îСϵͳµç· 14
3.1.1 µ¥Æ¬»úоƬAT89S52½éÉÜ 14
3.1.2 µ¥Æ¬»ú¹Ü½Å˵Ã÷ 14
3.1.3 AT89S52µÄ×îСϵͳµç·¹¹³É 17
3.2 µçÔ´µç·Éè¼Æ 17
3.3 Êý¾Ý²É¼¯²¿·Öµç·Éè¼Æ 18
3.3.1 ´«¸ÐÆ÷ºÍÆäÍâΧÒÔ¼°·Å´óµç·Éè¼Æ 18
3.3.2 A/Dת»»Ð¾Æ¬ÓëAT89S52µ¥Æ¬»ú½Ó¿Úµç·Éè¼Æ 19
3.4 ÏÔʾµç·ÓëAT89S52µ¥Æ¬»ú½Ó¿Úµç·Éè¼Æ 22
3.5 ¼üÅ̵ç·ÓëAT89S52µ¥Æ¬»ú½Ó¿Úµç·Éè¼Æ 23
3.6 ±¨¾¯µç·µÄÉè¼Æ 24
µÚ4Õ ϵͳÈí¼þÉè¼Æ 26
4.1 Ö÷³ÌÐòÉè¼Æ 26
4.2 ×Ó³ÌÐòÉè¼Æ 26
4.2.1 A/Dת»»Æô¶¯¼°Êý¾Ý¶ÁÈ¡³ÌÐòÉè¼Æ 27
4.2.2 ÊýÖÆת»»×Ó³ÌÐòÉè¼Æ 27
4.2.3 ÏÔʾ×Ó³ÌÐòÉè¼Æ 27
4.2.4 ¼üÅÌɨÃè×Ó³ÌÐòµÄÉè¼Æ 27
4.2.5 ±¨¾¯×Ó³ÌÐòµÄÉè¼Æ 28
½áÂÛ 29
л´Ç 30
²Î¿¼ÎÄÏ× 31
¸½Â¼ 32
ÍâÎÄ×ÊÁÏ·­Òë 39