同频抗互扰低成本安检机双光障设计
2021年电子技术应用第1期
庞晓东
公安部第一研究所，北京102200
摘要： 光障是X光安检设备的关键部件，用量大且价格高。为了降低成本及增加性能，减少对外购成品的依赖，提出了一种光障设计方案。针对安检机的特定应用需求，采用单一时钟源和固定相位差的发射和接收方式，选用低成本元件，实现了安检机内多光障的抗互扰可靠工作；设计了自动增益功能及自检功能，通过优化的互连接口，简化了系统接线，进一步完善了整机性能。批量应用后，其价格仅为原系统的十分之一，有效降低了安检机的生产成本。
中圖分類號： TN702
文獻標識碼： A
DOI：10.16157/j.issn.0258-7998.200245
中文引用格式： 龐曉東. 同頻抗互擾低成本安檢機雙光障設計[J].電子技術應用，2021，47(1)：57-60，68.
英文引用格式： Pang Xiaodong. Design of anti co-channel interference, low cost twin light barriers for security inspection equipment[J]. Application of Electronic Technique，2021，47(1)：57-60，68.
文獻標識碼： A
DOI：10.16157/j.issn.0258-7998.200245
中文引用格式： 龐曉東. 同頻抗互擾低成本安檢機雙光障設計[J].電子技術應用，2021，47(1)：57-60，68.
英文引用格式： Pang Xiaodong. Design of anti co-channel interference, low cost twin light barriers for security inspection equipment[J]. Application of Electronic Technique，2021，47(1)：57-60，68.
Design of anti co-channel interference, low cost twin light barriers for security inspection equipment
Pang Xiaodong
The First Research Institute of Ministry of Public Security，Beijing 102200，China
Abstract： Light barriers are the key parts of X-ray security inspection equipment, which are used in large amount and cost a lot. In order to reduce the cost, increase the performance and reduce the dependence on the purchased products, a light barrier design scheme is proposed in this paper. According to the specific application requirements of the security inspection machine, a single clock source and a fixed phase difference transmitting and receiving mode are adopted, and low-cost components are selected to realize the reliable anti-interference of multiple light barriers in the security inspection machine; the automatic gain control function and self-test function are designed, and the system wiring is simplified through the optimized interconnection interface, so the performance of the whole machine is further improved. After batch application, the price is only one tenth of the original system, which effectively reduces the production cost of the security inspection machine.
Key words : light barrier；security inspection equipment；low-cost; photoelectric switch；X-ray inspection
0 引言
為了感知傳送帶上經過的行包，進而對行包進行計數(shù)和X光檢測，目前的安檢機行包入口處均安裝有光障，即光電開關傳感器[1]。入口光障的數(shù)量至少為兩個，以可靠探測多種外形的行包。目前國內安檢機所使用的光障均為外購的成品，價格較高。為進一步普及安檢機的應用，必須降低生產成本，改善安檢機的性價比。因此，迫切需要一種低成本、抗干擾的光障設計方案。
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作者信息:
龐曉東
(公安部第一研究所，北京102200)
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