Recently, the European Commission's non-food rapid alert system (RAPEX) recalled Chinese-made LED light strings. The notified country of this case is Hungary. The product in the OECD Portal Category (OECDPortalCategory) is 78000000 (electrical). Reason for recall: The cross-sectional area of ​​the outer and inner conductors is too small. This may cause the cable to overheat and cause a fire, some of the wires may be touched, causing the user to get an electric shock, and the product does not comply with the Low Voltage Directive and EN60598.
Displacement sensor, also known as linear sensor, is a linear device belonging to metal induction. The function of the sensor is to convert various measured physical quantities into electricity. In the production process, the measurement of displacement is generally divided into measuring the physical size and mechanical displacement. According to the different forms of the measured variable, the displacement sensor can be divided into two types: analog and digital. The analog type can be divided into two types: physical property type and structural type. Commonly used displacement sensors are mostly analog structures, including potentiometer-type displacement sensors, inductive displacement sensors, self-aligning machines, capacitive displacement sensors, eddy current displacement sensors, Hall-type displacement sensors, etc. An important advantage of the digital displacement sensor is that it is convenient to send the signal directly into the computer system. This kind of sensor is developing rapidly, and its application is increasingly widespread.
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