A lvdt sensor installation structure for an actuator

Abstract

The invention provides an LVDT sensor mounting structure for an actuator. The LVDT sensor mounting structure comprises a first connection assembly, a second connection assembly, a flexible structure assembly and an iron core connecting rod. The wire outlet end of an LVDT sensor stator is fixed to a speed reducer case of the actuator through the first connection assembly, the wire outlet end is used as the first end of the LVDT sensor stator, and the other end is used as the second end of the LVDT sensor stator; the second end of the LVDT sensor stator is fixed to an actuator case through the second connection assembly; the first end of the iron core connecting rod is fixed to a ball screw nut of the actuator through the flexible structure assembly; the second end of the iron core connecting rod is connected with an LVDT sensor iron core; the axis of the iron core connecting rod is coaxial with the axis of the LVDT sensor iron core. According to the LVDT sensor mounting structure, an LVDT sensor is used for measuring the line displacement of the electromechanical actuator, and the LVDT sensor is a non-contacting sensor, so that the problem that a contact sensor is easy to wear is avoided, and the service life of the sensor is prolonged; meanwhile, the LVDT sensor has relatively high measurement precision.

Description

technical field [0001] The invention relates to an actuator LVDT sensor installation structure, which belongs to the technical field of electromechanical servo electromechanical actuators. Background technique [0002] Existing electromechanical actuators often use potentiometers as their linear displacement measurement methods, while the linear displacement sensor of the positioner is a contact sensor, which has the problems of severe wear and reduced measurement accuracy after long-term work. Signal jumping causes the vibration of the electromechanical actuator, and the contact end of the potentiometer is polluted by grease, which reduces the measurement accuracy. [0003] At present, the existing LVDT sensors for actuators often do not take insulation measures. The LVDT sensors are prone to receive electromagnetic interference from other components, which affects the test accuracy. In order to reduce the electromagnetic interference of the LVDT sensor from the actuator mo...

AI Technical Summary

Problems solved by technology

[0002] Existing electromechanical actuators often use potentiometers as their linear displacement measurement methods, while the linear displacement sensor of the positioner is a contact sensor, which has the problems of severe wear and reduced measurement accuracy after long-term work. The signal jumps and then causes the vibration of the electromechanical actuator, and the contact end of the potentiometer is polluted by grease, which reduces the measurement accuracy

[0003] At present, the existing LVDT sensors for actuators often do not take insulation measures. The LVDT sensors are prone to receive electromagnetic interference from other components, which affects the test accuracy. In order to reduce the electromagnetic interference of the LVDT sensor from the actuator motor or other components, it is necessary to LVDT sensor is insulated

[0004] Some actuators adopt the external structure of LVDT sensor, which has low reliability and is easily disturbed by external media.

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