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用来进行工程性实验预测和估计,达到优化实验,提高水平和效率,提高工程建设的可行性和经济性。. “ 模块化与组合”的方法是用LabVIEW 开发热工仿真程序的基本方法之一。. 所谓“ 模块化”就是对基本的热工对象的特征属性以及其热工过程的计算方法进行封装 ...
- Advantages and Disadvantages of Temperature Sensors
- Temperature Sensor Characteristics
- Temperature Range
- Linearity
- Sensitivity
- Response Time
- Stability
- Acuracy
- Durability
- Cost
Depending on what your limitations or needs are, from budget to hardware capabilities, each sensor has advantages and disadvantages with each sensor type. It’s important to understand and prioritize test needs to pick the best sensor for your application. Table 1. Advantages and Disadvantages of Temperature Sensor Types
When selecting a sensor, understand the impact of each characteristic on your measurements and be sure to select a sensor that aligns closely with your project requirements. Use the following characteristics to define your temperature sensor capabilities and performance. These characteristics apply to all temperature sensor types but with some cave...
The temperature range of a sensor defines the temperatures at which the sensor is rated to operate safely and provide accurate measurements. 1. Thermocouple: Each type has a specified temperature range based on the properties of the metals used in creating that thermocouple. 2. RTDs: Exchanges a smaller temperature range for better linearity and ac...
An ideal sensor would have a perfectly linear response: a unit change in temperature would result in a unit change in voltage output across the entire temperature range of the sensor. However, no sensor is perfectly linear. Figure 3 offers an idea of the temperature-to-voltage response of the three sensors this resource examines. Figure 3. Temperat...
The sensitivity of a given sensor indicates the percent change in measurable output for a given change in temperature. A more sensitive sensor, like a thermistor, can more easily detect small changes in temperature than a less sensitive sensor, like a thermocouple. This sensitivity, however, comes at the expense of linearity. This can be an importa...
Response time is the measure of time a sensor takes to respond to a change in temperature. Many factors can cause response times to increase or decrease. A larger RTD or thermistor, for example, has a slower response time than a smaller one. In exchange for this drawback and poorer thermal shunting, a larger RTD or thermistor is less susceptible to...
The stability of a temperature sensor is an indication of its ability to maintain a consistent output at a given temperature. Material plays a key role in the stability of a given sensor. RTDs are often constructed of platinum for this reason as well as to ensure low reactivity. The substrate to which the platinum is bonded, however, may deform und...
As with any measurement application, understanding your accuracy needs is critical in ensuring reliable results. Your sensor and measurement hardware selections play a significant role in absolute measurement accuracy, but smaller details such as cabling, relative proximity to other equipment, shielding, grounding, and so on can all affect accuracy...
To ensure your temperature sensors remain operational for the duration of your application, you need to understand the environment in which you are deploying them. Some sensors (thermocouples, for example) are inherently more durable because of their construction. The metals selected for a particular thermocouple, however, have different resistance...
As with any aspect of a project, cost can be a key limiting factor. In high-channel-count applications, for example, the linearity benefits of RTDs may be outweighed by the relative increase in cost versus thermocouples. You must also consider the added cost of wiring, mounting, and signal conditioning when considering total system cost.
硬體維修規定. NI 的產品維修與相關服務，將根據特定的規定與政策進行。. 查看硬體維修規定. NI 提供世界級的維修與替換服務以及計畫，協助您降低總擁有成本、避免非預期的維護開支，並且延長正常運作時間。.
尋找支援資源，包括文件、範例與下載內容。了解可用的支援服務，或向 NI 工程師提出服務需求。 LabVIEW 始終在測試領域扮演關鍵角色，藉由 NI 挹注在核心技術、社群與整合等方面的投資，可兼顧速度與效率，提供多項嶄新功能。
本文提供的資訊可協助您了解基本應變概念、應變規的運作方式，以及如何選擇適合的配置類型。決定您要使用的感測器後，即可考慮所需的軟硬體，以正確處理、擷取與顯示應變量測值。如需額外的訊號處理功能，您也可以納入考慮。
解決 方案 優勢. 最多支援 240 個 DUT，冷熱板溫度範圍介於 20 °C 到 200 °C。 提供最高 1.5 kV 的高壓汲極刺激源與最高 1500 V 的最高汲極電壓，兩者皆可透過軟體進行設定。 有高達 1 V/ns 的閘道 dV/dt 刺激源，且可透過軟體設定最高 ±30 V 的電壓。 提供 0 Hz 至 500 kHz 的可設定輸出頻率，工作週期設定介於 25% 到 75% 之間，按 5% 增減。 支援以特定用途的閘極驅動器進行測試，進行目標評估。 功率 半導體 劇烈 變化： 是否 會 漂移？ (DGS) 寬 能 隙 半導體 測試 挑戰.
圖 1 是量測元件方塊圖。右邊的量測系統由儀器與訊號處理功能構成。請注意，訊號處理 可以是儀器內建功能，也可以是外接功能。左側是訊號源，可能是一個會根據物理現象產生電壓的傳感器，也可能是受測裝置。本文探討訊號源接地、量測系統接地 ...
