TURCK displacement sensor working principle introduction

The displacement of the TURCK displacement sensor is an amount related to the movement of the position of the object during the movement, and the range of measurement of the displacement is quite extensive. Small displacements are usually detected by strain gauge, inductive, differential transformer, eddy current, and Hall sensors. Large displacements are commonly measured by sensing technologies such as inductosyn, grating, capacitive grid, and magnetic grid. Among them, the grating sensor has the advantages of easy digitization, high precision (currently the highest resolution can reach nanometer level), strong anti-interference ability, no human error, easy installation, reliable use, etc., in machine tool processing, instrumentation and other industries. Get an increasingly wide range of applications.
TURCK displacement sensor works
Turck turck potentiometer displacement sensor that converts mechanical displacement into a resistive or voltage output linearly or in any function through a potentiometer element. Both the ordinary linear potentiometer and the circular potentiometer can be used as linear displacement and angular displacement sensors, respectively. However, a potentiometer designed to achieve the purpose of measuring displacement requires a certain relationship between the change in displacement and the change in resistance. The movable brush of the TURCK potentiometer displacement sensor is connected to the object to be measured.
The displacement of the TURCK displacement sensor object causes a change in the resistance of the potentiometer's moving end. The amount of change in resistance reflects the magnitude of the displacement, and the increase or decrease in the resistance indicates the direction of the displacement. A power supply voltage is typically applied to the potentiometer to convert the change in resistance to a voltage output. The wirewound potentiometer changes its resistance with a 匝 resistance as a step when its brush moves, and its output characteristics are also stepped. If such a displacement sensor is used as a displacement feedback element in a servo system, an excessive step voltage will cause the system to oscillate. Therefore, the resistance value of each turn should be minimized in the fabrication of the potentiometer. Another major drawback of potentiometer sensors is their tendency to wear. Its advantages are: simple structure, large output signal, convenient use and low price.
The magnetostrictive displacement sensor accurately measures the absolute position of the moving magnetic ring by non-contact measurement and control technology to measure the actual displacement value of the detected product. The high precision and high reliability of the sensor have been widely used in thousands of applications. In the actual case.
The TURCK displacement sensor is not directly in contact with the active magnetic ring and the sensitive component as the position. Therefore, the sensor can be used in extremely harsh industrial environments and is not susceptible to oil, solution, dust or other pollution. IP protection is above IP67. . In addition, the sensor uses high-tech materials and advanced electronic processing technology, so it can be used in high temperature, high pressure and high oscillation environment. The Turck sensor output signal is an absolute displacement value. Even if the power is interrupted or reconnected, the data will not be lost, and there is no need to reset to zero. Since the sensitive components are non-contact, even if the detection is repeated, no damage will be caused to the sensor, which can greatly improve the reliability and service life of the detection.
The TURCK magnetostrictive displacement sensor uses the principle of magnetostriction to accurately measure the position by generating a strain pulse signal by the intersection of two different magnetic fields. The measuring element is a waveguide, and the sensitive elements in the waveguide are made of a special magnetostrictive material. The measurement process is to generate a current pulse from the sensor's electronics chamber that is transmitted within the waveguide to create a circumferential magnetic field outside the waveguide that intersects the magnetic field generated by the moving magnetic ring that is placed over the waveguide as a positional change. At the time of the magnetostriction, a strain mechanical wave pulse signal is generated in the waveguide, and the strained mechanical wave pulse signal is transmitted at a fixed sound speed and is quickly detected by the electronic chamber.
Since the transmission time of the strained mechanical wave pulse signal in the waveguide is proportional to the distance between the movable magnetic ring and the electron chamber, the distance can be determined with high accuracy 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 variable value, and there is no need to periodically re-mark.
The magnetostrictive displacement sensor is a high-precision, long-stroke absolute position measurement displacement sensor manufactured according to the principle of magnetostriction. It adopts non-contact measurement method. Because the movable magnetic ring for measurement and the sensor itself are not in direct contact, and are not rubbed and worn, they have long service life, strong environmental adaptability, high reliability, good safety and convenience. The system works automatically, even in harsh industrial environments. 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. TURCK displacement sensor works
TURCK displacement sensor characteristic parameters
Nominal resistance: The resistance value indicated on the potentiometer.
Repeatability: The smaller the parameter, the better.
Resolution: The minimum displacement value that the displacement sensor can feed back. The smaller the parameter, the better. The resolution of the conductive plastic displacement sensor is infinitesimally small.
Allowable error: The percentage of the ratio of the nominal resistance to the actual resistance to the nominal resistance is the resistance deviation, which indicates the accuracy of the potentiometer. The allowable error is generally within ±20%, as the general displacement sensor is used in a partial pressure manner. The size of the specific resistor has no effect on the data acquisition of the sensor.
Linear accuracy: linearity error. The smaller the parameter, the better.
Lifetime: Conductive plastic displacement sensors are more than 2 million times.