CN2101846U

CN2101846U - Linear shift sensor

Info

Publication number: CN2101846U
Application number: CN 91213395
Authority: CN
Inventors: 王月红
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-03-22
Filing date: 1991-03-22
Publication date: 1992-04-15

Abstract

The utility model discloses a linear shift sensor, which is used for measuring a linear shift. The utility model is suitable for situations with requirements that the range of measurement is among 0 meter to 40 meters, and the resolutions of reading is 0.01 meter. The linear shift sensor is formed by that the rotating shaft of a multi-turn potentiometer is connected with a rotating disk after being engaged with a tooth gear. A resistance value, corresponding to the linear shift between the movable arm and the fixed arm of a potentiometer, can be measured when the linear shift is changed to the rotational shift of the rotating shaft of the potentiometer by the rotating disk, and the linear shift can be measured.

Description

Linear shift sensor

The utility model relates to a kind of sensor of measuring straight-line displacement, is the sensor of 0.01 meter straight-line displacement especially for measurement 0-40 rice, resolution, belongs to electronic technology field.

Existingly be used to measure linear displacement transducer that 0-40 rice and resolution reaches 0.01 meter two kinds of coding type and ultrasonic types are arranged.The coding type linear displacement transducer at first becomes straight-line displacement into angular displacement by rotating disk, is about to the rotation that straight-line displacement becomes code-disc.Application of printed wiring board technology print is by the conducting wire of forming by certain code system on code-disc, have one row conductive contact pin therewith printed wire contact, in the code-disc rotating process, the electric signal of being drawn by these contact pilotages changes, and this electric signal promptly is and the corresponding digital signal of straight-line displacement amount.The ultrasonic type displacement transducer is to occur reflex when utilizing ultrasound wave to run into different medium in communication process, measures straight-line displacement by measuring from being transmitted into the needed time of reflection.

For the coding type displacement transducer, because it is output as digital signal, so this signal needs be passed in parallel to display controller with polycore cable, and along with the raising of range, the core number of required cable increases.For example, range is a 0-20 rice, and resolution is that 0.01 meter coding type sensor need transmit signal with 12 core cables, even this makes that in common application the expense of signal transmission is also very high.On the other hand, the acquisition of output digital signal obtains owing to one group of contact pilotage (such as 12 contact pilotages are arranged) contacts with code-disc.Therefore, code-disc requires contact pilotage to answer strictness to arrange in a line during fabrication, otherwise the situation of error code just can occur, and this makes manufacturing cost increase.For the ultrasonic type displacement transducer, because its range is subjected to accepting the restriction of part sensitivity, therefore if require range big (such as 0-20 rice), then its manufacturing cost is very high, again because its measuring principle that adopts, make its Measurement Resolution be difficult for higher (being generally 0.1 meter), so its application also is restricted.

Task of the present utility model provides a kind of existing high resolving power and wide range scope, has the signal transmission cost low again, the sensor low cost of manufacture, and precision height and sensor output signal are easy to the linear displacement transducer of characteristics such as handling.

Task of the present utility model realizes as follows: the turning axle of accurate multiturn potentiometer directly or by gearing mesh is connected mutually with a rotating disk, when straight-line displacement is transformed into angular displacement by rotating disk, when promptly driving the turning axle rotation of potentiometer, resistance value between potentiometer swing arm and the fixed arm promptly changes, and corresponding one by one with straight-line displacement amount, thereby this sensor is finished the conversion from the straight-line displacement amount to the electrical quantities.

Rotatable 3600 ° usually on the turning axle of the accurate multiturn potentiometer that the utility model adopts, therefore, it has improved resolution on the one hand, has big range ability on the other hand again; Simultaneously, because the manufacturing process maturation of accurate multiturn potentiometer, technical indicator is stable, and cost is low.Therefore, manufacturing of the present utility model is simple, and cost is low; The 3rd, because the sensor output quantity is a resistance, thus can this resistance be sent to display controller with two core leads, thus the signal transmission cost reduced.

Accompanying drawing is the longitudinal sectional drawing of a kind of concrete structure of the present utility model.

With reference to accompanying drawing, after the rotating disk ［ 1 ］ that the centre has a groove is fixed in axle ［ 3 ］ with nut ［ 2 ］, be bearing on the bearing ［ 5 ］, bearing ［ 5 ］ is loaded on the support ［ 4 ］, axle ［ 3 ］ is tightened up by screw ［ 6 ］ with potentiometer ［ 9 ］, support ［ 4 ］ is fixed on the bearing ［ 8 ］ by bolt, nut ［ 7 ］, ［ 11 ］, and potentiometer ［ 9 ］ is fixed on the bearing ［ 8 ］ by nut ［ 10 ］.

The groove of rotating disk ［ 1 ］ is provided with in order to allow flexible rope walk around rotating disk, and its width is decided by the diameter of flexible strand.The size of rotating disk ［ 1 ］ diameter D is decided by the number of turns of the range and the accurate multiturn potentiometer of sensor, is 0-5 rice such as working as range, when potentiometer rotating shaft rotatable 10 is enclosed, and desirable 160 millimeters of D.

Claims

1, a kind of linear displacement transducer is characterized in that the turning axle of accurate multiturn potentiometer directly is connected mutually with a rotating disk; Rotating disk is provided with the groove that allows flexible rope walk around, and the diameter of rotating disk is decided by the number of turns of the range and the accurate multiturn potentiometer of sensor.

2, linear displacement transducer as claimed in claim 1 is characterized in that the turning axle of accurate multiturn potentiometer is connected with a rotating disk mutually by gearing mesh.