SU807040A1 - Linear displacement transformer-type sensor - Google Patents

Description

one

The sensor relates to the measurement and measurement technique and can be used, in particular, to measure and monitor the linear interchanges of moving objects in difficult operating conditions.

According to the main auth. 476439, a linear displacement transducer is known, which contains an H-shaped core with three excitation windings, one of which is located along the core of this core on its middle rod, and the other two are koryutkos1mkHytfcie wound through holes in the middle rod at the ends of the core, that their planes are perpendicular to the dispersion flows of the end sections of the cores. The measuring windings are made in the form of coils of movable flat rectangular coils located in the gaps of the core l.

However, the accuracy of measuring the permutations of a known sensor is insufficient, due to the dependence of the output voltage of the sensor on the fluctuations of the supply voltage and the magnetic properties of the ferromagnetic core, the magnetic permeability of which

varies in conditions of significant temperature changes. Therefore, monitoring is necessary in the measurement process.

sensor sensitivity.

The purpose of the invention is to control sensitivity.

This goal is achieved by including the measuring windings.

opposite and displaced one relative to another in the direction of movement.

This allows the functionality of the sensor to be expanded.

The drawing shows the design of the proposed sensor.

The linear displacement transducer sensor contains an H-shaped ferromagnetic core 1, an excitation distribution winding 2, a short-circuited excitation windings 3 and 4, a measuring winding 5 and 6. The winding 5 is displaced relative to the winding 6 by some predetermined constant value. A signal proportional to the displacement is removed from the terminals.

7 and 8, and the signal proportional to the sensitivity of the sensor - from terminals 8 and 9.

The sensor works as follows. When applying a variable voltage

Claims (1)

power to the distributed winding 2 of the excitation in the measuring windings 5 and 6 causes an alternating current emf The magnitude of the emf varies linearly with the measuring windings relative to the core, as this leads to a linear change in the lengths of the measuring windings penetrated by the magnetic flux of the excitation system evenly distributed along the direction of travel, then, LH6X; : bykh / cx-dx ;; (2), K-Vx t3 ftxx-, respectively, the voltage at the output of the measuring windings 5 and b J the width of each of the measuring windings (it is obvious that the production A.X. and A (X-LH) determine, respectively, the interaction area measuring windings 5 and b with a magnetic excitation flow in the core gap); the circular frequency of the sensor power supply; magnetic induction in the core gap, the measured displacement LH is the magnitude of the shift of one of the measuring windings relative to the other in the direction of the measured displacement voltage, proportional to the sensitivity of the sensor. Since from expressions (1) and (2) it can be seen that the sensitivity of sensor S is determined by the expression (a) B, (4), then from expression (3) with unchanged AX, it follows that the value of Ug is proportional to the sensitivity of the sensor. At the initial and final parts of the working range of motion, the linearity of the output EMF of the measuring windings does not occur, since the magnetic scattering streams of the core core sections are compensated for using short-circuited windings 3 and 4 wound through holes in the middle rod. Thus, the proposed sensor allows, in the process of measuring movement, to perform and monitor the sensitivity of the sensor. Claims of the Transformer Linear Motion Sensor according to Aut. No. 476439, characterized in that, in order to control the sensitivity, the measuring windings are turned on and opposite one are shifted relative to the other in the direction of motion. Sources of information taken into account during the examination. l.ABTOpoKoe certificate of the USSR No. 476439, cl. From 01 to 7/00, 1973 (prototype). I I SS S S S SS SSSS SS SSSSSSSSSS SSSS "SS SSSS I S" 8 -05 J I -0