电子元件目检设备设计

??本科毕业设计说明书（论文）

结 论

通过本次的毕业设计，使我能够对书本的知识做进一步的了解与学习，对资料的查询与合理的应用做了更深入的了解，本次进行电子元件目检测设备的设计，对我们在大学期间所学的课程进行了实际的应用与综合的学习。

基于机械设计理论，设计的电子元件目检设备解决了电子元件的分拣问题，缩短劳动时间，提高了劳动效率。根据设定选择了合理的步进电动机和传动机构符合了设计的间歇性运动。通过了解设备的性能要求，设计更加人性化。

由于本人设计水平有限，本设计在动力部分参数的确定均采用以往的经验，选材的合理性以及结构中相关尺寸的确定也还存在欠缺。以上问题都可以作为本设计课题的改进方向。

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??本科毕业设计说明书（论文）

致 谢

随着毕业论文的结束，毕业设计也接近了尾声。我四年的大学生活也即将划上一个圆满的句号。四年大学的学习生活注定将成为我人生中的一段重要旅程。四年来，我的师长、我的辅导员、我的同学给予我的关心和帮助，使我终身收益，我真心地感谢他们。 在本文的撰写过程中，首先要感谢的是李明达老师，李老师作为我的指导老师，他治学严谨，学识渊博，视野广阔，为我营造了一种良好的学术氛围。在此特向李明达老师致以衷心的谢意！向他无可挑剔的敬业精神、严谨认真的治学态度、深厚的专业修养和平易近人的待人方式表示深深的敬意！

此外，本文参考了大量杂志期刊和专业丛书，由于参考期刊太多，不能一一注明，敬请原谅并向所有作者和刊物致以诚挚的谢意！由于本人水平有限，纰漏之处在所难免，恳请各位老师不吝赐教。

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??本科毕业设计说明书（论文）

参考文献

[1] 王德东、李效忠、徐雪盟.电子电气产品机械结构设计综述[J].电子机械工程,2004.

[2] 凌均淑.步进电动机的应用及驱动方式[J]电气时代.2005.08. [3] 璞良贵、纪明刚.机械设计(第七版)[M]. 北京:高等教育出版社,2001. [4] 璞良贵、纪明刚.机械设计学习指南(第四版)[M]. 北京:高等教育出版社,2000.

[5] 龚天军、贺地求、符荣华.零件分拣机系统设计[J].中国汽车制造技术.2006.12.

[6] 林颖、曾志新、孙延.Pro/ENGINEER快速入门及应用[专著]/编著.北京:电子工业出版社,2000.8.

[7] 李希诚、李弦泊编著.机械结构合理设计图册[M].上海:上海科学技术出版社,1996.5.

[8] 李忠杰、宁守信.步进电动机应用技术[M]. 北京:机械工业出版社,1988.12. [9] 祝凌云、李斌、白雁均.Pro/ENGINEER野火2.0版入门指南[M].北京:人民优点出版社,2005.

[10] 卢耀祖、郑惠强.机械结构设计[M].上海:同济大学出版社,2004. [11] 机构（机械设计手册）[专著]．北京：化学工业出版社，2004. [12] 彭文生.机械设计(第一版).武汉:华中理工大学出版社,2001. [13] 廖念钊. 互换性与测量技术基础[M]. 北京:中国计量出版社,1995. [14] 吕仲文主编.机械创新设计[M]. 北京:机械工业出版社,2004. [15] 吴宗泽主编.机械结构设计[M]. 北京:机械工业出版社,1988,4

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??本科毕业设计说明书（论文）

附 录

Pressure sensors papers

Reasonable pressure sensor error compensation is the key to its application. Pressure sensors are mainly offset error, sensitivity error, linear error and lag errors, the paper will introduce the four errors on the mechanism and the effects of the test results, will be presented at the same time to improve the measurement accuracy of pressure calibration method and application examples .

Currently on the market a variety of sensor types, which allows design engineers can choose the pressure sensor system. These sensors not only include the most basic converter, but also more complex circuits with on-chip, highly integrated sensor. Because of these differences, the design engineer must be enough as far as possible compensation of pressure sensor measurement error, which is to ensure that the design and application of sensors to meet the requirements of an important step. In some cases, compensation can increase the sensor in the application of the overall performance.

Based on Motorola's pressure sensor as an example, the application of the concept involved in the design of a variety of pressure sensor applications.

Motorola mainstream production pressure piezoresistive sensor is a monolithic device, the device has 3 categories:

1. Basic calibration or without compensation; 2. There are calibration and temperature compensation; 3. There are calibration, compensation and amplification.

Offset, the scope of calibration and temperature compensation can be through the thin film resistor networks, the thin film resistor networks in the process of laser package amendments.

The sensor is usually used in conjunction with the micro-controller, and microcontroller embedded software itself, established a mathematical model of the sensor. Microcontroller reads the output voltage through the ADC conversion, the model can be converted to the pressure of the volume of voltage measurements.

The simplest sensor is the transfer function of the mathematical model. The model calibration over the entire optimization process and maturity model will be marked with the fixed-point increase.

From the point of view of metrology, measurement error has a very strict definition: it is characterized by measurement of pressure and the difference between the actual pressure.

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