GEFRAN Reset Linear Displacement Sensor

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GEFRAN displacement sensor from Italy is a linear device belonging to metal induction

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 electrical quantities. In the production process, displacement measurement is generally divided into two types: measuring physical dimensions and measuring mechanical displacement. According to the different forms of transformation of the measured variable, GEFRAN displacement sensors can be divided into analog and digital types. Simulation can be divided into two types: physical type and structural type. The commonly used GEFRAN displacement sensors are mostly analog structural types, including potentiometer type GEFRAN displacement sensors, inductive type GEFRAN displacement sensors, self-tuning machines, capacitive type GEFRAN displacement sensors, eddy current type GEFRAN displacement sensors, Hall type GEFRAN displacement sensors, etc. An important advantage of digital GEFRAN displacement sensors is that they facilitate the direct transmission of signals into computer systems. This type of sensor is developing rapidly and its applications are becoming increasingly widespread.

Displacement is a quantity related to the movement of an object's position during motion, and the range of measurement methods for displacement is quite extensive. Small displacement is commonly detected using strain gauges, inductive sensors, differential transformers, eddy current sensors, and Hall sensors, while large displacement is measured using sensing technologies such as induction synchronizers, gratings, capacitive gratings, and magnetic gratings. Among them, grating sensors are increasingly widely used in industries such as machine tool processing and detection instruments due to their advantages of easy digitization, high accuracy (currently the highest resolution can reach nanometer level), strong anti-interference ability, no human reading error, easy installation, and reliable use.

Potentiometer type GEFRAN displacement sensor converts mechanical displacement into resistance or voltage output that is linearly or functionally related to it through potentiometer components. Both ordinary linear potentiometers and circular potentiometers can be used as linear displacement and angular GEFRAN displacement sensors, respectively. However, potentiometers designed for measuring displacement require a definite relationship between displacement changes and resistance changes. The movable brush of the potentiometer type GEFRAN displacement sensor is connected to the measured object.

The displacement of an object causes a change in resistance at the moving end of the potentiometer. The change in resistance reflects the magnitude of displacement, and whether the resistance increases or decreases indicates the direction of displacement. Usually, a power supply voltage is applied to the potentiometer to convert resistance changes into voltage output. The output characteristics of a wire wound potentiometer also exhibit a stepped shape due to the fact that the resistance changes step by step with the turn resistance when the electric brush moves. If this kind ofGEFRAN displacement sensorIf used as a displacement feedback element in a servo system, excessive step voltage can cause system oscillation. Therefore, in the production of potentiometers, the resistance value of each turn should be minimized as much as possible. Another major drawback of potentiometer sensors is their susceptibility to wear and tear. Its advantages are: simple structure, large output signal, easy to use, and low price.

magnetostrictionGEFRAN displacement sensorAccurately detecting the absolute position of the active magnetic ring through non-contact measurement and control technology to measure the actual displacement value of the tested product; The high precision and reliability of this sensor have been widely applied in thousands of practical cases.

Due to the lack of direct contact between the active magnetic ring and sensitive components that determine the location, the sensor can be applied in extremely harsh industrial environments and is not easily affected by oil stains, solutions, dust, or other pollutants. The IP protection level is above IP67. In addition, the sensor adopts high-tech materials and excellent electronic processing technology, so it can be applied in high temperature, high pressure, and high oscillation environments. The sensor output signal is an absolute displacement value, and even if the power is interrupted or reconnected, the data will not be lost, let alone reset to zero. Due to the non-contact nature of sensitive components, even repeated testing will not cause any wear on the sensor, greatly improving the reliability and service life of the detection.

The magnetostrictive GEFRAN displacement sensor utilizes the principle of magnetostriction to accurately measure position by generating a strain pulse signal through the intersection of two different magnetic fields. The measuring element is a waveguide, and the sensitive element inside the waveguide is made of a special magnetostrictive material. The measurement process is carried out by generating current pulses in the electronic chamber of the sensor, which are transmitted inside the waveguide and generate a circular magnetic field outside the waveguide. When the magnetic field intersects with the magnetic field generated by the movable magnetic ring as a position changing ring fitted on the waveguide, a strain mechanical wave pulse signal is generated inside the waveguide due to the effect of magnetostriction. This strain mechanical wave pulse signal is transmitted at a fixed sound speed and quickly detected by the electronic chamber.

Due to the fact that the transmission time of this strain mechanical wave pulse signal in the waveguide is proportional to the distance between the active magnetic ring and the electronic chamber, this distance can be determined highly accurately by measuring the time. Since the output signal is a true absolute value, rather than a proportional or amplified signal, there is no signal drift or variation, and there is no need for periodic recalibration.

The magnetostrictive GEFRAN displacement sensor is a high-precision, long stroke absolute position measurement GEFRAN displacement sensor manufactured based on the principle of magnetostriction. It adopts a non-contact measurement method, and due to the lack of direct contact between the active magnetic ring used for measurement and the sensor itself, it is not subject to friction or wear. Therefore, it has a long service life, strong environmental adaptability, high reliability, good safety, and is convenient for system automation work. Even in harsh industrial environments, it can work normally. In addition, it can withstand high temperature, high pressure, and strong vibration, and has been widely used in the measurement and control of mechanical displacement.

The working principle of a straight line is similar to that of a sliding potentiometer. It is used as a voltage divider and presents the actual position of the measured position with relative output voltage. There are several requirements for the operation of this device, including:

If the electronic ruler has been used for a long time, and the seal has aged, mixed with many impurities, and the water mixture and oil will seriously affect the contact resistance of the electric brush, the displayed numbers will keep jumping. At this point, it can be said that the electronic ruler of the linear GEFRAN displacement sensor is damaged and needs to be replaced.

If the capacity of the power supply is very small, many situations may occur, so the power supply needs to have sufficient capacity. So, if the capacity is insufficient, it will cause the following situations: the movement of the melt adhesive will cause the display of the mold closing electronic ruler to change and fluctuate, or the movement of the mold closing will cause the display of the injection electronic ruler to fluctuate, resulting in significant measurement errors. If the driving power supply of the solenoid valve is combined with the power supply of the linear GEFRAN displacement sensor, the above situation is more likely to occur. In severe cases, the voltage range of the multimeter can even measure the relevant voltage fluctuations. If the situation is not caused by high-frequency interference, electrostatic interference, or insufficient neutrality, then it may be due to the power supply being too low.