How to choose industrial sensors correctly

The principles structures of modern sensors are different. How to a sensor reasonably according to the specific measurement purpose, measurement object measurement environment is the first problem to be solved when measuring a certain amount. When determining the sensor, you can also determine the matching measurement method measurement equipment. The success failure of the measurement results largely depends on whether the sensor selection is reasonable. People may know that March 31st is the World Backup Day celebrated by people in the IT industry. In this world, the technology industry encourages consumers professionals to back up their important data. The backup day also provides a good reminder for data center professionals. Backing up critical data also means implementing the correct power protection strategy to ensure that the data center goes down without losing business.

1 Determine the sensor type according to the measurement object measurement environment

To carry out specific measurement work, we must first consider what kind of sensor principle to use, it can be determined after multi-factor analysis. Because even if it measures the same physical quantity, there are sensors with multiple principles to choose . Which type of sensor is more suitable, you need to consider the following specific issues according to the characteristics of the measured object the use conditions of the sensor: the size of the measuring range; the requirement of the measured position on the volume of the sensor; whether the measurement method is contact non-contact; signal extraction Method, wired non-contact measurement; the source of the sensor, whether domestic imported, whether the price is affordable, independent research development.

After considering the above issues, we can determine which type of sensor to choose, then consider the specific performance indicators of the sensor.

2 the choice of sensitivity

Generally speaking, within the linear range of the sensor, it is hoped that the higher the sensitivity of the sensor, the better. Because only when the sensitivity is high, the output signal value corresponding to the measured change is relatively large, which is beneficial to signal processing. However, it should be noted that the sensor has high sensitivity, external noise related to the measurement is easily mixed in, it will be amplified by the amplification system, which will affect the measurement accuracy. Therefore, the sensor itself is required to have a higher signal-to-noise ratio minimize external interference signals.

The sensitivity of the sensor is directional. When the measurement is a single vector, when the directivity requirements are high, a sensor with lower sensitivity in other directions should be selected; if the measurement is a multi-dimensional vector, the smaller the cross sensitivity of the sensor, the better.

three. Frequency response characteristics

The frequency response characteristic of the sensor determines the frequency range to be measured, it must remain undistorted within the allowable frequency range. In fact, the response of the sensor always has a fixed delay, it is hoped that the delay time is as short as possible.

The higher the frequency response of the sensor, the wider the frequency range of the measurable signal.

In dynamic measurement, the response characteristics should be based on the characteristics of the signal (steady, transient, random, etc.) to avoid excessive errors.

4 linear range

The linear range of a sensor refers to the range the output is proportional to the input. Theoretically, the sensitivity remains unchanged within this range. The wider the linear range of the sensor, the larger the range, a certain measurement accuracy can be guaranteed. When selecting a sensor, when determining the sensor type, the first thing to look at is whether its range meets the requirements.

But in fact, no sensor can guarantee absolute linearity, its linearity is also relative. When the required measurement accuracy is low, within a certain range, the sensor with less nonlinear error can be approximated as linear, which will bring great convenience to the measurement.

5 stability

The ability of a sensor to keep its performance unchanged after a period of use is called stability. In addition to the structure of the sensor itself, the factors that affect the long-term stability of the sensor are mainly the use environment of the sensor. Therefore, in order to make the sensor have good stability, the sensor must have strong environmental adaptability.

Before choosing a sensor, you should investigate its use environment, the appropriate sensor according to the specific use environment, take appropriate measures to reduce the environmental impact.

DEUPREE (Qingdao) Industrial Technology Co., Ltd. is an integrated enterprise focusing on the research development of automated industrial technology equipment manufacturing. The company’s products mainly include rotary motion sensors, linear displacement sensors, object recognition sensors, laser rangefinders, process control measurement Class instruments, signal detection systems, signal transmission systems, immature drive systems, UPS safety power supply systems, automation equipment energy-saving cleaning auxiliary equipment systems are limited to this, we can also customize flexibly customize according to customer needs to meet different Different needs of customers.