SU499843A3 - Non Contact Pulse Motion Converter - Google Patents

Description

The invention relates to automation and computing and is intended to convert the rotation angle into a pulse sequence.

Contactless pulse displacement transducers are known that contain capacitive-sensitive elements located on the disks of the rotor and stator of the converter, capacitors, a high-frequency generator, the output of which is connected to the input of a threshold device through a rectifier.

A disadvantage of the known devices is their low accuracy, caused by the insufficient high sensitivity of the capacitive-sensitive elements to movement.

Improving the accuracy of the converter is achieved by the fact that in it the even and odd capacitive-sensitive elements of the stator of the converter are divided into two groups and connected inside each group electrically in parallel, each of the groups of these elements being connected to the opposite shoulders of the bridge, to which other arms are connected. the bridge diagonals are connected to the feedback inputs of the high-frequency generator.

FIG. 1 shows the rotor and stator of the converter; in fig. 2 is a block diagram of the proposed device.

On the rotor 1 of the converter, made in the form of a disk, capacitive-sensitive elements 2 are located, and on the stator disk 3 there are two groups of even 4 and odd 5 capacitive-sensitive elements alternating between themselves and connected between soy inside the group are eleurically parallel.

The output 6 of the rotor disk 1 of the converter and the output 7 of the stator disk of the converter are connected to the corresponding points of the block diagram (Fig. 2). Conclusions 8 and 9 of groups 4 and 5 of capacitive-sensing elements are connected to the opposite shoulders of the bridge 10, formed by groups 4 and 5 and capacitive-sensitive elements 2 of the rotor. The other shoulders of bridge 10 include capacitors 11 and 12 of constant capacitance. The diagonals of the bridge 10 are connected to the feedback inputs of the high-frequency generator 13, the output 14 of which is connected via the rectifier 15 to the input of the threshold device 16.

The operation of the device is as follows.

When moving the capacitive-sensitive Elements 2 of the rotor relative to the capacitive-sensitive elements of the stator 3 at the output of the bridge, depending on being above the group of even or odd elements, the phase of the output is 11; from 1 to 180 email. hail. The GIFT of the EKO code and feedback of the high frequency generator of Tire 13 varies from a positive value to a negative one and vice versa. When the feedback feedback is present. With a higher gain ratio of the amplification of the high-frequency generator, self-oscillations occur at its output 14, which are rectified into a direct current of rectification 15, which triggers the triggering device 16. In the presence of negative feedback, the oscillations break down the output of the threshold device 16, the signal is missing. Thus, the displacement of the rotor of the converter is transformed into a sequence of pulses, the spatial extent of which corresponds to the angular spacing between the capacitive elements of the even and odd groups of the stator disk. 5 10 15 20 Ф о р м y; i and the Contactless pulse displacement transducer was invented, which contains capacitive-sensitive elements located on the rotor and stator disks of the converter, capacitors, high-frequency generator, the output of which through a rectifier is connected to the input of the threshold device, different the fact that, in order to increase the accuracy of the converter, even and odd capacitive-sensitive elements of the stator of the converter are divided into groups and are interconnected in parallel, each The PP capacitive-sensitive elements are connected to the opposite shoulders of the bridge, to which other capacitors are connected capacitors, and the diagonal of the bridge is connected to the feedback inputs of the high-frequency generator.

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