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1. Temperature Sensor: The working principle of temperature sensors based onthermally sensitive elementsprimarily obtains temperature information by measuring the temperature changes of objects or the environment.Common thermally sensitive elements includethermistorsandresistance temperature detectors. When the temperature changes, the resistance value of the thermally sensitive element also changes accordingly; by measuring the change in resistance value, the temperature can be inferred.
2. Humidity Sensor: Humidity sensors typically operate based on capacitive principles. A capacitive humidity sensor consists of two electrodes, with a hygroscopic material as the medium. When the moisture content in the air changes, the humidity of the hygroscopic material also changes accordingly, thereby alteringthe capacitance value. By measuring the change in capacitance value, the humidity value can be calculated.
3. Pressure Sensor: Pressure sensors generally use pressure-sensitive elements, such as membrane sensors or strain gauges. When force is applied to these elements, their shape or size undergoes slight changes. By measuring these changes, pressure information can be obtained. Membrane sensors, such as membrane resistance strain gauges, have their resistance values change due to stress, and by measuring the change in resistance value, the pressure can be inferred.
4. Light Sensor:Light sensors can operate based on thephotoelectric effect of photodiodes or phototransistors. When light strikes the light-sensitive element, the resistance or current of the light-sensitive element will change accordingly; by measuring this change, the light intensity information can be obtained.
5. Acceleration Sensor: Acceleration sensors often use micro-electromechanical systems (MEMS) technology, utilizing small mechanical structures based on mass acceleration principles. When acceleration or vibration occurs, the small mass in the sensor displaces, and by measuring this displacement or feedback signal, acceleration or related motion information can be calculated.
6. Magnetic Sensor: Magnetic sensors operate based on the Hall effect or magnetoresistive effect. Common magnetic sensors include Hall sensors and magnetoresistive sensors. Hall sensors obtain magnetic field strength information by measuring the change in Hall voltage caused by the magnetic field acting on Hall elements. Magnetoresistive sensors obtain magnetic field strength information by measuring the change in resistance of magnetoresistive elements caused by the magnetic field.
This is just some common sensor working principles; in reality, there are many other types of sensors, each with its unique working principles.
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On-the-job training base for college graduates——Jinan CNC Mold Technology Research Institute has been primarily engaged inCAD/CAM advanced programming, five-axis programming with UG, CNC machine maintenance, injection mold design, stamping die design, reverse modeling, industrial robots, 3D printing, etc. pre-job training. One-time registration for lifetime learning. During the training, teachers conduct periodic tests to fully control the learning progress of students, with small class teaching, one-on-one tutoring, a combination of theory and practice, and learning until mastery. After completion, free job placement is provided. The research institute provides long-term technical support and employment services for students. All faculty and students of the Jinan CNC Mold Technology Research Institute welcome your visit and learning. The institute is currently located at 20333 A4 District, Panwang Road, Shengjing Street, Zhangqiao District, Jinan City.
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