产品新知 您所在的位置:电子展览网 > 行业资讯 > 产品新知

Cypress 无代码可视化嵌入式系统实现触摸感应和接近式触摸




关键词:

bio
作者简介

Mark Lee is a Principal Applications Engineer at Cypress Semiconductor in Lynnwood, Washington. He has a PhD in Electrical Engineering from the University of Washington where his research topic was the computer-aided modeling of the dielectric properties of materials. He has been awarded several patents related to analog electronics. His 2006 article entitled "The Art of Capactive Touch Sensing" was awarded The Best of 2006 Award by Planet Analog for the most downloaded article of the year.

Mark Lee是赛普拉斯半导体公司设在华盛顿州Lynnwood市的首席应用工程师。拥有华盛顿大学电气工程专业博士学位,研究课题是材料介电性质的计算机辅助模拟。获得过多项有关模拟电子元件的专利。其于2006年撰写的名为“电容式触感之道”的论文被评为“2006年度最佳论文”,成为当年下载次数最多的论文。

Title: Code-Free Approach Enables Embedded systems with Touch and Proximity

题目:无代码可视化嵌入式系统实现触摸感应和接近式触摸

Author: Mark Lee, Cypress Semiconductor

作者:Mark Lee,赛普拉斯半导体公司

Length: around 2000 words

篇幅:约4000

Introduction
引言

The capacitive sensing user interface has established itself in recent years as a practical and innovative upgrade for push buttons in many types of consumer goods. A light tap on a smooth surface or the proximity of a hand replaces physical actuation of a mechanical switch.

电容式感应用户界面近年来已使其自身成为众多消费品中实用型和创新型按钮升级版。在光滑表面上轻轻一触,或者用手靠近一下,就能代替机械开关的物理传动。

Capacitive sensing modules make it easy to add a touch and proximity interface to a system since there is no code to write or debug. Just take the module off the shelf and drop it into the system. Sensor modules however are inflexible in the functions they perform, and may limit the features that can be added to a product. A more flexible solution is desirable since it is often the little extras that get added at the last minute that make a product stand out from the competition.
有了电容式感应模块,给系统添加一个触摸和接近感应就变得容易起来了,因为无需编写或调试任何代码。只需选择现成的模块,然后加载到系统中就行了。但是,仅仅感应模块所执行的功能可能稍欠灵活,因而可能会限制产品的某些特色。最好有一种更具灵活性的解决方案,让某种产品在最后一刻从众多竞争产品中脱颖而出的往往就是多出来的那么一点点功能。

This article shows how to incorporate capacitive sensing features into a simple embedded system without writing a single line of code. This Code-Free approach has the convenience of off-the-shelf modules, with the flexibility of a code-intensive embedded controller. The complete design process is demonstrated for a real-world product idea, from concept to working prototype.
本文介绍的是,如何将电容式感应特色融入至一个简单的嵌入式系统之中,而无需编写一行代码。这种无代码方法不仅具有现成模块的便利性,而且具有代码密集型嵌入式控制器的灵活性。本文描述了完整的设计过程,提出了一种实际产品的创造理念,从构思一直到制作样机。

The Code-Free approach to system design is made possible with PSoC Express software and the FirstTouch evaluation kit, both from Cypress Semiconductor. Creative people that brainstorm new products no longer need to throw the design over-the-wall to engineering to get a working prototype. If you can draw a block diagram of your system, you can create a real product using the graphical interface of PSoC Express. The whole process can easily be completed in a couple of hours for someone new to PSoC Express. Development time and project costs are both reduced in the process.
这种用于系统设计的无代码方法可通过PSoC Epress软件和FirstTouch评估套件实现,此二者均为赛普拉斯公司的产品。为新产品苦思冥想的创意人员不必为了得到样机辛辛苦苦地将设计交给工程部加工了。如果你能画出系统的方块图,你就能利用PSoC Express的图形化界面创造出实际产品。即便对于PSoC Express的新手而言,也只需短短几个小时就能完成整个过程。在此过程中,开发时间和项目成本均显著减少了。

Building a Better Mousetrap
构建一个更好的触发器

The classic inventor's quest is to build a better mousetrap. The design example in the following discussion comes close to that very result. Let's create an embedded system as a design example that combines two trends in electronics: capacitive sensing and digital photography. Our example project will be a smart proximity sensor that triggers a digital camera. Such a system is called a "camera trap". These cameras have been in science news headlines in recent years. Wildlife researchers have used camera traps to prove that animals once thought extinct are still on the prowl, like jaguars in Arizona [1]. In remote places like the dense forests of Borneo, scientists have also discovered totally new species with these cameras [2].
优秀的发明家的追求是构建一个更好的触发器。以下讨论所给出的一个设计实例距离所需要的结果非常接近。我们来创建一个嵌入式系统,以此作为结合了电子元件两种趋势的设计实例:电容式感应和数字摄影。我们的实例项目是一个可以触发数码相机的智能近程传感器。近些年来,这类相机已多次登上科技新闻的头条。野生动物研究人员已使用相机触发器,借此向人们证明他们一度认为已经绝种的动物仍然生存着,比如亚马逊流域里的美洲虎[1]。在像婆罗洲稠密的原始森林这样的偏远地区,科学家们亦使用这类相机发现了全新的物种[2]

The existing technology for camera traps seems to be working just fine. Why reinvent the wheel? Here is a short comparison of old and new technology that makes the case for building a better trap.
现有的相机触发器技术似乎很有效。为何发明车轮?本文对传统技术和新技术进行了简要比较,以便对构建更好的触发器起到抛砖引玉的作用。


Old Technology: Based on PIR motion sensor. At high ambient temperatures, animals in the target zone get lost in the background scene. Reflected sunlight gives false detects. The bulky hardware needs to be hidden from the animals and protected from elements, yet any blockage to optical path will disable trigger. The trigger zone is hard to customize with simple lenses.
传统技术:基于PIR运动传感器。周围环境温度较高时,目标区域的动物会迷失在背景情境中。反射的阳光使探测出现错误。体积庞大的硬件需要避开动物的视线,并且保护元件不受损坏,但光路上的任何障碍都会使触发器失效。使用简单的镜片,很难定制出触发器区域。

New Technology: Based on Capacitive Proximity Sensor using a wire as the proximity sensor. Stealthy wire can be attached to branch, across a rock or by a watering hole. Trigger zone is very localized and fine tuned with a wire clipper. Works equally well in bright sunlight and starry night. Background heat has no effect on performance. The proximity sensor wakes up periodically, and wakes the camera only when an animal is in target zone, saving on battery power.
新技术:基于电容式近程传感器,使用导线作为近程传感器。隐蔽的导线可粘在树枝上,穿过石头或。触发器区域最好选局部化,并使用断线钳进行微调。在阳光明媚的白天和天空缀满星星的夜晚,效果同样很好。背景热量对其性能没有影响。近程传感器会定时检测,并且只有当动物在目标区域的时候才会触发相机,这样就节省了电池电力。

Comparing the two approaches to building a camera trap, it is seen that the capacitive sensing approach to camera traps has advantages over the existing approach in certain situations. The new approach should find a niche in the field of wildlife research.
比较两种构建相机触发器的方法,我们可以发现构建相机触发器的电容式感应法在特定情况下,拥有超过现有方法的优点。这种新方法应该会在野生动物研究领域派上用场。

分享到:
收藏 打印
相关新闻
  • 没有相关信息!