SU1566198A1 - Transducer of linear displacements - Google Patents

Abstract

This invention relates to a measurement technique. The goal is to increase accuracy and speed by eliminating the dependence of accuracy on the parameters of the pulse front of the request and the read pulse of the end of the count of information pulses and issuing information about the movement in a parallel form. With the passage of the section of the magnetic carrier 1 without recording pulses, the second one-oscillator 10 with a logic zero signal resets the pulse counter 9 and sets the trigger 5 to the state "1", the latter allows the passage of the pulses from the first driver 3 pulses through the AND 4 circuit to the counting input of the counter 9. One-vibrator 10 is triggered by each pulse for a time longer than the pulse period from the generator 3. The first pulse from the output of the one-shot 10 logical unit removes the reset signal of the counter 9 and the setting signal one Itza latch 5. The counter counts the number of pulses arriving at the count input from the output of the AND gate 4. When an unrecorded section magnitonositel passage 1 at a magnetic head 7 monostable multivibrator 11 proceeds to the initial state, i.e., at its output a logical zero signal appears. With the arrival of the first pulse, a logical unit appears at the output of the one-shot 11, locking the trigger 5. The last prohibits the passage of pulses from the generator 3 to the counting input of counter 9, and the number of pulses from counter 9 to the register 12 simultaneously records. 1 Il.

Description

The invention relates to measuring equipment and can be used in mechanical engineering, machine tool industry and other areas of the national economy.

The purpose of the invention is to improve the accuracy and speed by eliminating the dependence of accuracy on the parameters of the front of the request pulse and the read pulse of the end of the information pulse count and the transfer of information about the movement in parallel.

The drawing shows a block diagram of a sensor.

The linear displacement sensor contains an annular magnetic carrier J, a first magnetic head 2, a shaper 3 IMDULSE, the INPUT of which nofl-jg keys to the output. Head 2, circuit I 4, the first input of which is connected to the output of the shaper 3 pulses, trigger 5, the output of which connected to the second input of the circuit And 4, the rod 6, the second 25 magnetic head 7, mounted on the rod 6, the second pulse shaper 8, the input of which is connected to the output of the second magnetic head 7, the counter 9 pulses, the counting input · which is connected to the output of the circuit And 4, the first one-shot atator 10, the input of which is connected to the output of the Shaper 3, and the output is connected to the installation input of the trigger unit 5 and the reset input of the counter 9, the second one-shot 11, the input of which is connected to the output of the second shaper 8, and the output of the second one-shot 11 is connected to the synchronizing input of the trigger 5 , at the information input of which the logic zero voltage is constantly on, register 12, controlling

- The input of which is connected to the output of the second one-shot 11, and the information inputs are connected to the outputs of the counter 9. The ring magnet circuit 1 has a section without recording pulses.

The sensor operates as follows. The annular magnet carrier 1 moves from the magnetic head 2 to the magnetic head 7. When an unrecorded area passes through the magnet carrier 1 near the magnetic head 2, pulses do not come from the Former 3 to the one-shot 10, the one-shot 10 is started and the logic zero output from the one-shot 10 resets the counter 9 and sets trigger 5 to a single state. From the output of trigger 5, the logical unit supplied to the input of circuit And 4 permits the passage of pulses from the shaper 3 through another input of circuit And 4 to the counting input of counter 9. The recorded pulses of a given frequency from magneto carrier 1 are read by magnetic head 2, and the former supplies pulses to a single-shot 10, which is triggered by each pulse for a time longer than the period of the pulses from the shaper 3. Thus, 15, the first pulse at the output of the one-shot 1 sets the logical unit and removes the reset signal 9 and snip unit setting signal latch 5. The counter 9 counts the number of pulses arriving at the count input from the output of the AND circuit 4.

At. the passage of an unrecorded section of the magnet carrier 1 · in the moving one, the smut 7, the formers 8 do not generate pulses and the one-shot J 1 goes into the initial state, i.e. a logic zero signal appears at its output. With the arrival of the first pulse from the movable head 7, the Shaper 8 · starts a single-shot 11, and a signal of a logical unit appears at its output. On the positive edge of the signal from the output of the one-shot 11, applied to the synchronizing input of the trigger 5, the latter records a logical zero signal, constantly connected to the information input, and circuit 4 ,. prohibits the passage of pulses from the Shaper 3 to the counting input of the counter 9. At the same time, according to the positive difference from the single-shot 11, the number of pulses that ^ 5 were counted by the counter 9 is recorded in register 12.

This completes the linear motion measurement cycle. The number of pulses recorded in register 12 is determined by the number of recorded pulses per unit length of magneto carrier 1 and the distance between the fixed magnetic head 7 mounted on the rod 6.

Claims (1)

The claims 55 A linear displacement sensor containing a ring magnet carrier, a first magnetic head, a first pulse shaper connected to it, a circuit I, a first input connected to an output of a first pulse shaper, a trigger connected to a second input of a circuit And intended to connect to a rod object, fixed on it is a second magnetic head connected to it by a second pulse shaper and a pulse counter, characterized in that, in order to improve accuracy and speed, it is equipped with a first and second one by the inputs connected to the outputs of the respective pulse shapers and the register, and the ring magnet carrier is made with sections with recorded pulses of a given frequency, the length of the section with recorded pulses is an order of magnitude higher than the $ gap between them, circuit output And connected to the counting input of the pulse counter, the output of the first one-shot is connected to the installation input 10 of the trigger and the reset input of the pulse counter, the output of the second one-shot is connected to the clock input of the trigger and the control input of the register, information 15, the input of which is connected to the output of the pulse counter, and the output of the register is the output of the device.