SU748481A1 - Displacement sensor - Google Patents

Description

(54) DISPLAY SENSOR

I

The invention relates to the field of electromechanics, automation and telemechanics, and is intended to convert movements, both linear and angular, into digital form and can be used in numerical control indication systems.

The known angle-code converter converts the angular positions of the shaft into digital data on the indicator 1.

This transducer has a complex magnetic system and a large number of magnetically controlled contacts (MUKs) for displaying a discreteness unit on the indicator.

Also known is a linear displacement sensor containing a permanent magnet associated with a controlled organ, magnetic contacts located along the length of the displacement and divided into groups, one ends of which are combined in each group and through the corresponding element OR NOT from a chain of series-connected elements AND LI-NOT are connected to the lamps of the higher-order indicator, the indicator of the lower-order indicator, the elements AND and the additional elements OR-NOT, the height of the permanent magnet being equal to the discrete step, and the magnetic control The contacts are located at a distance equal to two discrete steps, to the inputs of the AND elements, which are connected to the lamps, the display of even digits of the lowest discharge indicator, are connected to the inputs of each pair of magnetic contacts, located in the same group, to the inputs elements and which are connected to

10 lamps of indication of odd digits of the lowest-order indicator, the outputs of the same-name magnetic-controlled contacts of each group and the inverted output of the AND elements, one of the outputs of each AND element 15 and connected to the previous AND element, are connected through the corresponding additional element OR-HB. The sensor allows you to simplify the magnetic system and reduce the number of MUK per unit of discreteness 2.

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However, in this linear displacement sensor, this is achieved by increasing the number of logic elements, which reduces its reliability.

The aim of the invention is to improve the reliability of the sensor.

The goal is achieved by the fact that a displacement sensor containing a permanent magnet, a magnetically controlled contact with a controlled organ, is located along the length of the displacement and divided into groups, an element, an indicator and a voltage source, a generator, a modulator, limiting resistors and dissolving diodes, the heights of the permanent magnet are longer than the distance between the two magnetic contacts, one ends of the magnetic contacts are connected to one output of the voltage source, the other ends of the mashitouprav The contact terminals are connected to the first terminals of the respective limiting resistors and, through the first and second isolating diodes, are combined into odd and even groups, respectively, and connected to the corresponding inputs of the AND element, the output of which is connected to the generator input, the outputs of which are connected to the control inputs of the modulator, the second the terminals of the limiting resistors are connected to the corresponding cathodes of the indicator and through the third and fourth isolating diodes are combined, respectively, into an odd group and us to corresponding inputs of the modulator, one output of which is connected to the anode of the indicator, the other output - to the other terminal of the voltage source.

FIG. Figure 1 shows a general view of the sensor for the case of linear movement; Fig. 2 shows a general view of a sensor for circular movement; in fig. 3 is a schematic diagram of the displacement sensor.

The displacement sensor consists of the required number of magnetically controlled contacts (MUK) 1 located on the stator 2 of the permanent control magnet 3 located on the controlled organ (rotor) 4, decoupling diodes 5, indicator 6 of the modulator 7, generator 8 9, restrictive rezstorov 10, the voltage source 11.

In the given example, one indicator was applied to ten MUKs, giving a helium of the sensor operation.

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When a permanent control magnet 3 is located in the zone of operation of the MUK 1, one or two MUK 1s are triggered. The MUKs in the stator are designed in such a way that the technological dispersion does not affect the operation of the MUKs.

To eliminate the effect of the spread of the MUKs 1, the corresponding magnetowires are applied.

In the event of a single magnetic contact 1 tripping, the corresponding cathode of indicator 6 is ignited.

If two MUKs were triggered, in this case, the And 9 element gives permission for the operation of the generator 8, which controls the operation of the modulator 7, which in this case starts switching the cathodes of the indicator 6. The isolating diodes 5 prevent the interaction of the sensor elements. Limiting resistors 10 limit the current through the cathodes of the indicator 6 and elements, for example, the thyristors of the modulator 7. With a magnet height of 1.5 distances between the MUK, the sensor allows you to get on the indicator twenty positions at ten MUKs and one indicator

The use of a displacement sensor makes it possible to economically and reliably implement in the circuits of automation, numerical control and indication the reading of the position of the working body, as well as to control it.

Claims (2)

1. USSR author's certificate number 517918, cl. G 08 C 9/04, 1975. 2. USSR author's certificate number 511616, cl. G 08 C 9/04, 1974 (prototype).