Sensor calibration test chamber

The main purpose of the sensor calibration experiment is to determine the linear relationship between the sensor output signal and the actual physical quantity, so that the physical quantity can be accurately measured and converted in practical applications. The testing principle of the sensor calibration experiment mainly includes the following steps:

1. Prepare calibration equipment: mainly including sensors, calibration tables, data collectors, etc. Sensors can be of various types, such as pressure sensors, temperature sensors, displacement sensors, etc., depending on the experimental needs.

2. Prepare standard samples: Select appropriate standard samples according to the type and measurement range of the sensor. The standard sample can be a physical sample with known accurate values, such as a standard pressure gauge, standard thermometer, etc., or it can be a standard signal generated by an analog signal generator.

3. Install the sensor: Install the sensor on the calibration bench to ensure its stability and accuracy. For contact sensors, you need to pay attention to the contact method and torque of the sensor; for non-contact sensors, you need to ensure that the distance and angle between the sensor and the measured object meet the requirements.

4. Collect data: Start the data collector and record the sensor output signal and standard sample value in real time. During the calibration process, it is necessary to collect enough data points to facilitate subsequent calculation and analysis.

5. Data processing: Based on the collected data, calculate the linear relationship between the sensor output signal and the standard sample value. This can be achieved by least squares method, polynomial fitting, etc.

6. Draw a calibration curve: Draw the calculated linear relationship as a calibration curve to facilitate observation and analysis of sensor performance. The calibration curve usually includes the linear relationship between the sensor output signal and the physical quantity, sensor sensitivity, error and other parameters.

7. Analysis and evaluation: Based on the calibration curve, analyze the performance indicators of the sensor, such as linearity, repeatability, accuracy, etc. If the sensor performance does not meet the requirements, appropriate measures can be taken to adjust or replace it.

8. Write reports: Organize experimental data and results, write calibration reports, and record the sensor calibration process and performance evaluation.

The testing principle of the sensor calibration experiment involves multiple links, and each link needs to be strictly controlled to ensure the accuracy of the experimental results. When conducting sensor calibration experiments, appropriate calibration equipment and methods should be selected based on the sensor type, measurement range, and application scenarios, and the data quality during the experiment should be ensured.