SU544984A1 - Angle displacement transducer to code - Google Patents

Description

one

The invention relates to automation and computing and can be used to convert the angular displacement of a monitored shaft into a code.

The converters of the angular displacement of the shaft into code 1 are known, which contain an angular displacement sensor with spatially displaced windings, the outputs of which are connected to the inputs of logic elements through amplifiers-formers.

However, such converters have a complicated circuit and limited scope.

Also known converter 2, the closest in technical solution to the invention, contains a multi-phase displacement sensor with spatially displaced windings connected to the inputs of the corresponding phase-sensitive amplifiers, the outputs of which are connected to the inputs of the elements AND and NOT, and the outputs of each of the elements NOT to one of the the inputs of the preceding element And, and the display unit.

A disadvantage of the known devices is their narrow field of application, providing only a unitary binary code.

The purpose of the invention is to extend the functionality of the converter.

This is achieved by the fact that in it the outputs of the elements AND are connected to the inputs of the display unit. FIG. 1 is functional

converter circuit

The converter contains a multiphase displacement sensor 1 with spatially displaced windings, outputs connected via corresponding phase-sensitive amplifiers 2 to the inputs of the HE elements 3 and to one of the inputs of the AND 4 elements, to the other input of each of which the output of the HE element 3 is connected. The output elements And connected to the inputs of the block 5 of the display.

The principle of operation of the proposed converter is explained in the voltage diagrams in FIG. 2, where it is indicated: A - voltage at the output of the elements And 4; B - voltage on

the output of phase-sensitive amplifiers 2;

С is the voltage at the output of the elements NOT 3;

a - angular polonsenie shaft; Ui-LJi, - L / iu-

voltage A, B, C b different phases.

The multiphase angular displacement sensor has L phases, from which signals are taken and fed to phase sensitive amplifiers 2. To describe the device and the principle of operation of the transducer, assume that the sensor has 10 phases. The reading device includes 10 phase-sensitive amplifiers, 10 HE elements 3, 10 I 4 elements and an indication unit 5.

A necessary condition for the passage of information about the angular displacement of the sensor shaft to the display unit is the simultaneous presence of two signals of the same polarity on one of the 10 elements AND 4 of the reading device (see Fig. 1 and 2). Such a condition is fulfilled for the 1st channel 0 °, for the 2nd channel, etc.

When power is applied to the field winding on the output windings of a multi-phase angle non-displacement sensor, signals are generated that are shifted relative to each other.

27C

friend at an angle, where t is the number of phases,

tp

p - NUMBER OF NAROLUS.

When the angular position of the rotor a ai is fulfilled, the condition about which it is commented, i.e. at the input of one of the elements of H 4 there are simultaneously two signals of the same sign. For the remaining nine phases, this condition is not fulfilled, as can be seen from the diagrams of FIG. 2. In this case, information about the angular displacement of the shaft passes to the display unit 5 for the first phase. When the sensor shaft is rotated over an angle of more than 36 °, the information enters the display unit from the second phase, since when a ai + 36 °, the condition mentioned is fulfilled only for the second phase.

and so on. Block S performs the corresponding indication.

The proposed Converter allows the use of commercially available chips, which significantly reduces the size and weight of the reading device. The scheme uses many identical nodes, which also contributes to a reduction in setup time and element nomenclature.

The proposed converter allows to obtain discreteness from and above.

Claims (2)

1. Drozdov, E. A., et al. Automatic information conversion and coding, 1964, with. 48. 2. Avt. St. No. 447736, cl. G 08 C 9/00, 1972. cc corner of cc corner of