CN102150949A - 一种空头缺嘴检测器电路 - Google Patents

一种空头缺嘴检测器电路 Download PDF

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CN102150949A
CN102150949A CN2011100694822A CN201110069482A CN102150949A CN 102150949 A CN102150949 A CN 102150949A CN 2011100694822 A CN2011100694822 A CN 2011100694822A CN 201110069482 A CN201110069482 A CN 201110069482A CN 102150949 A CN102150949 A CN 102150949A
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CN102150949B (zh
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王天甜
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ANHUI KEDA AUTOMATION GROUP Co Ltd
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Abstract

一种空头缺嘴检测器电路,涉及检测技术领域,由LC振荡电路、晶体振荡电路、运放信号叠加增益放大电路及电源模块电路构成,其特征在于:所述的LC振荡电路由三极管BG3和BG2组成振荡电路,其中BG3附属电路由电阻R9、R10、R11、R12,电容C11、C12组成,BG2的反馈信号支路由电阻R6、R7、R8、C9,L1、L2、Cx组成;所述的晶体振荡电路由三极管BG1,电阻R1、R2、R3,电容C1、C2、C3、C8和晶体振荡器组成;所述的运放信号叠加增益放大电路由运放741,电阻R14、R15、R18、R20、RW2组成减法器电路;所述的电源模块电路由电阻R13、R16,电容C4、C7以及稳压管BW1组成。本发明电路原理设计合理、构思巧妙,检测速度快、灵敏度和检测精度高。

Description

一种空头缺嘴检测器电路
技术领域
本发明涉及检测技术领域,具体涉及用在香烟卷接自动生产线上,对烟支空头(烟丝短少)和过滤嘴缺失进行快速检测的空头缺嘴检测器电路。
背景技术
目前国内烟草行业对自动化程度要求越来越高,生产线上用于检测烟支空头缺嘴的器件多数采用光电检测器、接近开关等,但工作中往往存在检测速度、灵敏度和检测精度不高的缺陷。
发明内容
本发明所要解决的技术问题在于提供一种设计巧妙、检测速度快、灵敏度和检测精度高的空头缺嘴检测器电路。
本发明所要解决的技术问题采用以下技术方案来实现,
一种空头缺嘴检测器电路,由LC振荡电路、晶体振荡电路、运放信号叠加增益放大电路及电源模块电路构成,其特征在于:所述的LC振荡电路由三极管BG3和BG2组成振荡电路,其中BG3附属电路由电阻R9、R10、R11、R12,电容C11、C12组成,BG2的反馈信号支路由电阻R6、R7、R8、C9,L1、L2、Cx组成,振荡电路信号调节由L1、L2和Cx组成,其中Cx为产品检测电容;
所述的晶体振荡电路由三极管BG1,电阻R1、R2、R3,电容C1、C2、C3、C8和晶体振荡器组成,其中C8为高频信号输出滤波电路,RW1、C5、R5组成反馈支路;
所述的运放信号叠加增益放大电路由运放741,电阻R14、R15、R18、R20、RW2组成减法器电路,A、B两路为信号采集的输入端,D1、D2、D3、D4为单门限电路,采集相反信号进行叠加;
所述的电源模块电路由电阻R13、R16,电容C4、C7以及稳压管BW1(10V稳压管)组成。
本发明电源由±15V直流提供,在检测时,当无烟支或出现烟支空头或缺嘴时,感应电容容值不变,LC振荡频率的相位与晶体振荡电路相反,同时通过运放叠加在一起,由于幅值基本相同,采样处理后输出电压为0~1V之间的TTL底电平信号;当被检测烟支中的烟丝与感应电容面≤2毫米时,感应电容容值改变,继而改变LC振荡电路周期,使LC振荡信号与晶体振荡信号经过运放叠加,因相位相同两信号叠加在一起,使输出信号输出高电平。然后整体生产线通过采集高低电平信号,来确定烟支外型的合格情况,做出剔除或放行的动作。该电路的关键是要合理设计振荡电路的频率、周期、幅值,频率决定该产品的检测速度,周期是设计两信号能合理叠加的重要保证,而幅值是确保输出准确的TTL高低电平的。
本发明的有益效果是:本发明电路原理设计合理、构思巧妙,采用两路震荡信号相互叠加,一路信号为晶体震荡信号,另一路为LC振荡检测信号,形成高、低电平输出,当被检测物体离开或靠近时改变震荡周期,最终改变输出信号,高速、高灵敏的判断检测物体。
附图说明
图1为本发明电路结构图。
具体实施方式
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解,下面结合具体图示,进一步阐述本发明。
如图1所示,一种空头缺嘴检测器电路,由LC振荡电路、晶体振荡电路、运放信号叠加增益放大电路及电源模块电路构成,的LC振荡电路由三极管BG3和BG2组成振荡电路,其中BG3附属电路由电阻R9、R10、R11、R12,电容C11、C12组成,BG2的反馈信号支路由电阻R6、R7、R8、C9,L1、L2、Cx组成,振荡电路信号调节由L1、L2和Cx组成,其中Cx为产品检测电容;
晶体振荡电路由三极管BG1,电阻R1、R2、R3,电容C1、C2、C3、C8和晶体振荡器组成,其中C8为高频信号输出滤波电路,RW1、C5、R5组成反馈支路;
运放信号叠加增益放大电路由运放741,电阻R14、R15、R18、R20、RW2组成减法器电路,A、B两路为信号采集的输入端,D1、D2、D3、D4为单门限电路,采集相反信号进行叠加;
电源模块电路由电阻R13、R16,电容C4、C7以及稳压管BW1(10V稳压管)组成。
以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (1)

1.一种空头缺嘴检测器电路,由LC振荡电路、晶体振荡电路、运放信号叠加增益放大电路及电源模块电路构成,其特征在于:所述的LC振荡电路由三极管BG3和BG2组成振荡电路,其中BG3附属电路由电阻R9、R10、R11、R12,电容C11、C12组成,BG2的反馈信号支路由电阻R6、R7、R8、C9,L1、L2、Cx组成,振荡电路信号调节由L1、L2和Cx组成,其中Cx为产品检测电容;
所述的晶体振荡电路由三极管BG1,电阻R1、R2、R3,电容C1、C2、C3、C8和晶体振荡器组成,其中C8为高频信号输出滤波电路,RW1、C5、R5组成反馈支路;
所述的运放信号叠加增益放大电路由运放741,电阻R14、R15、R18、R20、RW2组成减法器电路,A、B两路为信号采集的输入端,D1、D2、D3、D4为单门限电路,采集相反信号进行叠加;
所述的电源模块电路由电阻R13、R16,电容C4、C7以及稳压管BW1组成。
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CN102150949B (zh) * 2011-03-22 2012-12-05 王天甜 一种空头缺嘴检测器电路

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Publication number Priority date Publication date Assignee Title
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