Banner Sensors – Classification and application of sensors

1. Resistive sensors

The basic principle of a resistive sensor is to convert the measured change into a change in the resistance value of the sensing element, and then turn it into an electrical signal output through the conversion circuit. Applications: 1. Strain resistance sensor, used to measure tensile and compressive stress, and other physical quantities based on this; thermistor sensors, which are used to measure temperature; Slide-arm resistance sensors to measure geometric positions (angles, displacements); Magnetistor sensors, which are used to measure magnetic fields. a photoresistive sensor, which is used to measure the intensity of light; Hygroscopic resistance sensor to measure humidity; Liquid resistivity sensor to measure the concentration of water-soluble ions.

2. Capacitive sensor

Piezoelectric micro-displacement, shaking table, electron microscope fine-tuning, astronomical telescope lens fine-tuning, precision micro-displacement measurement, measuring liquid level, humidity, and material composition, etc.

3. Inductive sensor

Detect the attenuation of the distance. The slip is made of iron, which is suitable for inductive sensor detection; The size of the measured part of the slip warp is slightly smaller than the size of the standard test object (the size of the standard test object is 3 times the rated detection distance, and in this application, the standard size should be 120*120mm), so there will be a certain attenuation; On-site anti-interference capability. This is a problem that cannot be ignored, ordinary inductive sensors are easily interfered with by motors or frequency converters, and many technicians only choose sensors with strong resistance to electromagnetic interference for applications in this vicinity. However, in the automobile manufacturing workshop, the plant is large, and the on-site technicians are accustomed to using walkie-talkies to communicate, especially when talking with walkie-talkies, they will inadvertently approach the sensor, resulting in a short failure; Installation. With the popularity of inductive sensors, sensors are not only improving in terms of electrical performance, but also in terms of mechanical design. To achieve user-friendly installation to the greatest extent. It reduces the stocking of a variety of similar products and reduces the time of installation and maintenance; Guarantee of stable operation. In the use of the car factory, it is necessary to eliminate any oil and dust erosion. In addition, the vibration is long-term when the warp passes through the track, and the excellent vibration resistance also plays a very important role.

4. Magnetoelectric sensor

Magnetoelectric sensors are mainly used for vibration measurements. Among them, the inertial sensor does not need a stationary base as a reference reference, and it is directly installed on the vibrating body for measurement, so it has been widely used in ground vibration measurement and airborne vibration monitoring systems. Commonly used ground vibration sensors include moving iron vibration sensors, ring vibration speed sensors, etc.

5. Eddy-current sensor

Eddy-current sensors can be applied to measure parameters such as vibration, displacement, thickness, number of revolutions, temperature, hardness, etc., and can also perform non-destructive testing. The KD2306 eddy-current sensor can be used for axial displacement and differential expansion detection of rotating machines.

6. Potential sensor

The inductive sensor has the outstanding advantages of simple structure, fast dynamic response, easy to achieve non-contact measurement, etc., and is especially suitable for acid, alkali, chloride, organic solvent, liquid CO2, ammonia, PVC powder, ash, oil-water interface and other liquid level measurement, and is widely used in metallurgy, petroleum, chemical, coal, cement, grain and other industries.

7. Semiconductor sensors

The main application areas of semiconductor sensors are industrial automation, telemetry, industrial robots, household appliances, environmental pollution monitoring, healthcare, pharmaceutical engineering, and bioengineering. Semiconductor sensors are divided into three categories: physically-sensitive, chemically sensitive, and biologically sensitive, according to the input information.

8. Resonant sensor

Resonant sensors have the advantages of small size, light weight, compact structure, high resolution, high accuracy, and convenient data transmission, processing and storage. It is mainly used to measure pressure, but also to measure torque, density, acceleration and temperature, etc.

9. Electrochemical sensors

Application of chemical sensors in environmental and health monitoring: In environmental and health monitoring, they are often used to measure air humidity in instruments such as wet bulb thermohygrometers, hand-cranked humidity thermometers and ventilation humidity thermometers. Application of electrochemical biosensors in early diagnosis of diseases

NA electrochemical biosensor is a new type of biosensor that has been studied in recent years, which has the characteristics of strong specificity, high sensitivity, fast detection, simple and economical, so it is of great significance in the early diagnosis of major diseases such as tumors.

Banner Sensors – Classification and application of sensors

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