How to choose a good sensor-INNO

There are many types of sensors, including commonly used thermal resistance sensors, mga sensor ng fiber optic, atbp. FJINNO has independently developed fiber optic temperature sensors. Maligayang pagdating upang makipag-ugnay sa amin.

The characteristics of sensors include:

1. Linear range

The linear range of a sensor refers to the range where the output is proportional to the input. In theory, within this range, sensitivity remains constant. The wider the linear range of the sensor, the larger its range and can ensure a certain measurement accuracy. When selecting a sensor, once the type of sensor is determined, the first thing to consider is whether its range meets the requirements. Gayunpaman, in reality, no sensor can guarantee absolute linearity, and its linearity is also relative. When the required measurement accuracy is relatively low, within a certain range, sensors with small nonlinear errors can be approximated as linear, which will bring great convenience to the measurement.

2. Katatagan

The ability of a sensor to maintain its performance unchanged after a period of use is called stability. The factors that affect the long-term stability of sensors, in addition to the structure of the sensor itself, are mainly the environment in which the sensor is used. Samakatuwid, in order for sensors to have good stability, they must have strong environmental adaptability.

3. Sensitivity selection

Karaniwan, within the linear range of a sensor, the higher the sensitivity of the sensor, the better. Because only when the sensitivity is high, the value of the output signal corresponding to the measured change is relatively large, which is beneficial for signal processing. Gayunpaman, it should be noted that the sensitivity of the sensor is high, and external noise unrelated to the measurement is also easily mixed in, which can be amplified by the amplification system and affect the measurement katumpakan. Samakatuwid, it is required that the sensor itself should have a high signal-to-noise ratio and minimize the introduction of interference signals from the outside world.

The sensitivity of sensors is directional. When the measured quantity is unidirectional and requires high directionality, sensors with low sensitivity in other directions should be selected; If the measured vector is a multidimensional vector, the smaller the cross sensitivity of the sensor, the better.

Determine the type of sensor based on the measurement object and measurement environment

To carry out a specific measurement work, the first thing to consider is what principle of sensor to use, which requires analyzing various factors before determining. Because even when measuring the same physical quantity, there are multiple principles of sensors to choose from. Which principle of sensor is more suitable needs to consider the following specific issues based on the characteristics of the measured quantity and the usage conditions of the sensor: the size of the range; The requirement of the measured position on the volume of the sensor; Is the measurement method contact or non-contact; Signal extraction method, wired or non-contact measurement; The source of the sensor, whether it is domestically produced or imported, whether the price is affordable, or self-developed.

After considering the above issues, matutukoy natin kung anong uri ng sensor ang pipiliin, at pagkatapos ay isaalang-alang ang mga partikular na tagapagpahiwatig ng pagganap ng sensor.

Mga katangian ng pagtugon sa dalas

Tinutukoy ng mga katangian ng frequency response ng mga sensor ang frequency range na susukatin, at dapat mapanatili ang hindi nababagong kondisyon ng pagsukat sa loob ng pinapayagang hanay ng dalas. Sa totoo lang, ang tugon ng mga sensor ay palaging may tiyak na pagkaantala, at inaasahan na mas maikli ang oras ng pagkaantala, the better. Mataas ang frequency response ng mga sensor, na nagreresulta sa isang malawak na hanay ng mga masusukat na frequency ng signal. Gayunpaman, dahil sa impluwensya ng mga katangian ng istruktura, malaki ang inertia ng mga mekanikal na sistema, at ang mga sensor na may mababang frequency ay maaaring magsukat ng mga signal na may mas mababang frequency.