Precisión y tiempo de respuesta de los sensores termistores

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!

Precisión y tiempo de respuesta de los sensores termistores

Adquisición remota del puerto serie RS485 TTL MODBUS RTU de 10K 3950 Sensor de temperatura NTC

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. Por lo tanto, 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.
‌ Compensación de temperatura‌: 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. Por lo tanto, 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. De este modo, 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. Por ejemplo, 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.
‌Disposición razonable de sensores de temperatura‌: La ubicación y disposición de los sensores de temperatura también afectarán el tiempo de respuesta.. Si el área de contacto entre el sensor y el objeto que se está midiendo es grande, el intercambio de calor será más rápido y el tiempo de respuesta será naturalmente más corto. Sin embargo, tenga en cuenta que un área de contacto demasiado grande también puede provocar mayores errores de medición, entonces tenemos que hacer una compensación basada en la situación real.