SU744697A1 - Linear displacement sensor - Google Patents

Description

The invention relates to a measurement technique and can be used to control the position of regulatory bodies moving in hermetic volumes, for example, in chemical industry apparatus and nuclear reactors. Devices for indicating linear displacements are known that contain a permanent magnet associated with a working body whose position is controlled by a magnetically controlled KOHTajcTbi (MUK) located on a non-magnetic pipe with a definite constant pitch and connected at one end to a common tire, the other ends connected to , cutting matrix diodes to output buses, communication buses, descrambler, digital lamps, scanning device lj Controlled organ with a permanent magnet moves along the tube on which the MUK and matrix diodes are located s, and closes one of the MUK. MUK divided into groups. One MUK pins belonging to one group are connected to one point and A relay is connected, which indicates the figure of this:. groups. Others - with the same conclusions MUK each group and through the relay; indicating the same number with one of the poles - with one of the poles of the power source; The closest to the invention in its technical essence is a linear displacement transducer containing a power source, a permanent magnet having a height equal to the discrete step, and associated with the monitored body, the muc located along the displacement distance of two In discrete steps, and combined into groups, in each group, one MUK pins are combined, and the other vectors are connected to the same pins of other groups, a two-digit indicator of numbers. These sensors have a relatively large number of communication lines for

indications of numbers, both junior and higher raar, in addition, the two-digit indicator has a large number of active elements. . .

The purpose of the invention is to simplify the sensor and increase its reliability.

This goal is achieved by the fact that in the linear displacement sensor each MUK group is connected to a power source through a register, and the common terminals of the same MUK groups are connected to the low-order digit indicator key driver and to the inputs of the OR element, the output of which is connected to the input of the j bodies of keys for controlling the indicator of numbers of higher digits.

FIG. 1 shows the electrical circuit of the sensor; in fig. 2 - graph of output voltages versus input-20 flow. ..

The linear displacement sensor contains a block 1 MUK consisting of three groups of magnetically controlled contacts 2-6, 7-11 and 12-16, connected 25 respectively via resistors 17-19 to the positive power source (not shown), element 20 OR The driver of control signals 21 (FSU), consisting of resistors 22 - 46 and diodes 47 - 56. The corresponding five inputs of element 20 OR and FSU-21 are connected to the same terminals of the same magnetic contacts of each group, and ten outputs 35 FSU 21 are connected to the key device 57, namely: to the bases of transis 58 - 67 keys, the collector load of which is an indicator of 68 digits of the lower order, emitters of transistors 58 - 67 are connected and through the resistor 69 are connected to the zero bus power supply, the output of element 2O OR is connected to the input of FSO-7O, The main device of the resistors 71–79, the outputs of the FSU 70 are connected to a key device — to the bases of transistors 81–83 keys, which control the operation of the indicator 84 digits of the highest order.

The device works as follows.

When a controlled organ moves, a permanent magnet (not shown) moving together to remove the sensor MUK 55 in such a way that each of the ten possible positions of the controlled body within one of the least significant bits corresponds to its combination of MUKs, and the closed can be either one MUK of any group, or two neighboring MUKs belonging to the same or different groups, accordingly, the positive pole of the power source is connected through one of the resistors 17-19 to o one or two corresponding inputs of the FSU 21, which at one or another of its outputs generates three different voltage levels. So, for example, if one of the MUKs 2, 7 or 12 is closed, then at the outputs, fcjj, -6 of the FSU 21, the potentials V,, V I appear, respectively, and Vj, V,. Since the transistors 58 - 67, which are part of the key device 57, have a common resistance in the emitter circuit, when a positive potential arrives at their base, that of the transistors opens, the potential based on which is the greatest. In this case, it will be a transistor, 58, lighting the figure O. on the indicator 68 digits of the lower order. In the case when there is a closed loop (tbbo pair MUK 2, 3; 7.8 or 12, 13, the potentials Vj, V, V,, Vi, respectively appear at the inputs 6p. -Bo it, i.e. . the transistor 59 will open and the number 1 of the indicator 68 will light up.

When one of the MUK 3, 8 or 13 is closed, positive potentials appear at the outputs O | , 2. and j, respectively, transistor 60 is opened, digit 2 is lit on display 68, and so on.

The formation of the high-order digit is as follows.

Claims (3)

Let the monitored body be in a position in which any MUKs of the first group are closed, for example, MUK 6. Then the positive potential from the power source goes through resistor 17 and element 20 OR to the input of the FSU 70 by an indicator of higher digits Three parallel-connected voltage dividers with different division factors and approximately the same input resistance, consisting of resistors 71–78. Dependencies of output voltages V, Vj, Vj Each of the dividers on the value of the input voltage vedeny FIG. 2. The magnitude of the resistor 17 is chosen such that when M is closed, CC 6 of the first group, the input voltage I of the O.O type is applied at the input of the FCS 70. in accordance with FIG. 2, potential V. appears. (And, as the key device 80 controlling the indicator 84, the higher-order digit, is made similarly to the key device 57, the transistor 81 with a large base potential opens and the figure O is ignited. as soon as a second group MUK 7 closes, with a closed MUK 6 at the input of the FSU 70, a voltage VBX J Vgx-p appears such that at the outputs of the FSU 70 L i, the potentials Vji VV appear, and the transistor 82 opens, lighting the digit on the indicator 84 digits etc. Thus, using the described linear displacement sensor, it is possible to measure the position of the monitored organ of the mechanism in a predetermined range of motion, while the sensor circuit contains 2 times fewer elements than in the prototype, This allows to increase its reliability. Formula of the invention Linear displacement sensor, containing a power source, a permanent magnet, having a height equal to the discrete step, and connected to a controllable organ, magnetic contacts, displaced along the length of the distance from each other, equal to two discrete steps, and combined into groups, in each group, one terminal of magnetically controlled contacts are combined, and the other conclusions are connected to the same terminal of other groups, a two-digit indicator of numbers, different in that that, in order to simplify the sensor and increase its reliability, each group of magnetic contacts is connected to the power source through a resistor, and the common leads of the same magnetic contacts of the groups are connected to the Yeh-lii keys control signals indicator numbers and the least significant bit to the inputs of the OR gate, the output of which is connected to the input of the key management signaling indicator bit numbers and higher. Sources of information taken into account in the examination 1. The author's certificate of the USSR 6 247080, cl. G Oli) 5/18, 1971. 2. Authors certificate of the USSR 381874, cl. G 01 B 7/14, 1973. 3. Authors certificate of the USSR 511616, cl. G 08 C 9/04, 1976 prototype). f8lgi ™ 5iSgyP F SggSSS ai; SKFig. 2