熱敏電阻感測器的精度和響應時間

The accuracy and response time of NTC and PTC thermistor sensors are two very critical performance indicators. Let me tell you in detail how they are controlled!

熱敏電阻感測器的精度和響應時間

RS485 TTL MODBUS RTU串列埠遠端採集10K 3950 NTC溫度感測器

304 stainless steel food probe NTC temperature sensor accuracy and response time

Accuracy control
To improve the accuracy of thermistors, we can start from the following aspects:
‌Choose the right model‌: The accuracy of different types of thermistors will also vary. 所以, when choosing, we have to select those with smaller temperature coefficients and higher accuracy according to specific application requirements.
‌Optimize circuit design‌: When designing the circuit, the linearity and stability of the thermistor must be fully considered. Through reasonable circuit configuration, such as using two-wire, three-wire or four-wire methods, we can reduce measurement errors and thus improve accuracy.
‌Use high-precision ADC‌: The accuracy of the analog-to-digital converter (ADC) also has a great impact on the overall measurement accuracy. Choosing an ADC with high resolution and low noise can further improve the accuracy of temperature measurement.
‌Signal conditioning‌: Through precise signal conditioning, such as amplification, filtering, and linearization, we can reduce noise and nonlinear errors, so that the measured results are more stable and accurate.
‌溫度補償‌: In order to reduce the impact of ambient temperature changes on the measurement results, we can also add a temperature compensation mechanism to the design.
‌Continuous monitoring and calibration‌: Don’t forget that the performance of thermistors will change over time. 所以, we must regularly monitor their performance and perform necessary calibrations to ensure long-term stability.

Response time control
As for response time, it is an important indicator to measure how quickly the thermistor responds to temperature changes. To improve the response time, we can try these methods:

‌Choose the right model‌: As mentioned earlier, different models of thermistors have different response times. Choosing models with shorter response times will naturally increase the response speed of the system.
‌Optimize circuit design‌: In circuit design, we can take some measures to reduce the time constant of the circuit, such as using low-noise circuit components. 這樣, the response time of the thermistor can be improved.
‌Improve the temperature control algorithm‌: For systems that need to respond quickly to temperature changes, we can also optimize the temperature control algorithm. 例如, by using the proportional-integral-derivative (PID) control algorithm, we can adjust the temperature of the system more quickly by adjusting the parameters of the controller.
‌溫度感測器的合理佈置‌‌: 溫度感測器的位置和排列也會影響反應時間. 若感測器與被測物體的接觸面積較大, 熱交換會更快，反應時間自然會更短. 然而, 請注意，接觸面積太大也可能導致測量誤差增加, 所以我們要根據實際情況進行權衡.