外文翻譯--正確選擇數(shù)據(jù)采集系統(tǒng)-展示頁
2025-01-17 08:16本頁面
【正文】 taken giant leaps forward over the last 30 to 40 years. For example, 40 years ago, in a typical college lab, apparatus for tracking the temperature rise in a crucible of sodiumtungsten bronze consisted of a thermocouple, a bridge, a lookup table, a pad of paper and a pencil. Today39。外文資料 Selecting the Right Data Acquisition System Engineers often must monitor a handful of signals over extended periods of time, and then graph and analyze the resulting data. The need to monitor, record and analyze data arises in a wide range of applications, including the designverification stage of product development, environmental chamber monitoring, ponent inspection, bench top testing and process troubleshooting. This application note describes the various methods and devices you can use to acquire it, record and analyze data, from the simple penandpaper method to using today39。s sophisticated data acquisition systems. It discusses the advantages and disadvantages of each method and provides a list of questions that will guide you in selecting the approach that best suits your needs. 1. Introduction In geotechnical engineering, we sometime encounter some difficulties such as monitoring instruments distributed in a large area, dangerous environment of working site that cause some difficulty for easy access. In this case, operators may adopt remote control, by which a large amount of measured data will be transmitted to a observation room where the data are to be collected, stored and processed. The automatic data acquisition control system is able to plete the tasks as regular automatic data monitoring, acquisition and store, featuring high automation, large data store capacity and reliable performance. The system is posed of acquisition control system and display system, with the following features: 1. No. of Channels: 32 (it can be increased or decreased according to user39。s college students are much more likely to use an automated process and analyze the data on a PC today, numerous options are available for gathering data. The optimal choice depends on several factors, including the plexity of the task, the speed and accuracy you require, and the documentation you want. Data acquisition systems range from the simple to the plex, with a range of performance and functionality. 2. Pencil and paper The old pencil and paper approach is still viable for some situations, and it is inexpensive, readily available, quick and easy to get started. All you need to do is hook up a digital multimeter (DMM) and begin recording data by hand. Unfortunately, this method is errorprone, tends to be slow and requires extensive manual analysis. In addition, it works only for a single channel of data。s level of fastidiousness and you may need to scale input manually. For example, if the DMM is not set up to handle temperature sensors, manual scaling will be required. Taking these limitations into account, this is often an acceptable Method when you need to perform a quick experiment. 3. Strip chart recorder Modern versions of the venerable strip chart recorder allow you to capture data from several inputs. They provide a permanent paper record of the data, and because this
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