Sensor with large working stroke and small size

Abstract

The invention discloses a sensor with a large working stroke and a small size. A rotating shaft is mounted in a shell through a bearing; a shaft disk is fixedly arranged on the rotating shaft and is coaxial with the rotating shaft; an annular groove is formed in the outer circumferential surface of the shaft disk; one end of a pull rope is fixed in the annular groove, and the other end of the pull rod is located outside the shell; an insulating sleeve is fixedly arranged on the rotating shaft in a sleeving manner; a circular resistor body is mounted inside the shell and is provided with a resistor body center hole; the insulating sleeve penetrates through the resistor body center hole and can freely rotate; a current collecting ring is fixedly arranged on the insulating sleeve in a sleeving manner. According to the sensor, by converting an angular displacement motion of an electric brush into a linear displacement motion of the pull rope, the aim of completing detection of relatively large linear displacement only through the relatively small size is fulfilled; the sensor is intrinsically a linear displacement sensor, but compared with the conventional linear displacement sensor, the sensor has an outstanding advantage of a decreased size, so that the sensor can meet an application environment of a relatively small installation space; meanwhile, the working stroke cannot be reduced due to the small installation space.

Description

technical field [0001] The invention relates to a displacement sensor provided with a brush and a resistor, in particular to a sensor with a large working stroke and a small volume. Background technique [0002] Displacement sensors are divided into angular displacement sensors and linear displacement sensors according to their working methods. The linear displacement sensor is a displacement sensor that converts linear mechanical displacement into electrical signals. [0003] In traditional linear displacement sensors, the variable resistance slide rail is usually fixed on the fixed part of the sensor, and different resistance values ​​are measured through the displacement of the slide plate on the slide rail; the sensor slide rail is connected to a steady-state DC voltage, allowing microamperes to flow The small current, the voltage between the slider and the starting end, is proportional to the length the slider moves. [0004] It can be seen from the above that the work...

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the above that the working stroke of the traditional linear displacement sensor is directly proportional to the volume of the sensor, which leads to the inability of the traditional linear displacement sensor to achieve the effect of large working stroke and small volume, which limits the application of the linear displacement sensor

Images