SU1160247A1 - Optical device for graduating and checking thermometers - Google Patents

Description

The aim of the invention is to expand the scope of the device software control.

Nafig 1 shows a structural diagram of the proposed device; in fig. 2 - functional block diagram of the direction of motion; in fig. 3, too, unit 4 controls the direction of the account; in fig. 4 the same, block 18 of the formation of control commands; in fig. 5 - characteristics of the braking drive.

The device contains a feedback sensor 1, a pulse former 2, a directional direction detection unit 3, a counting direction control unit 4, a drive 5, a decoder 6 zero, a reversible counter 7, a display unit 8, a decoder 9 of the current coordinate, the first element 10 EQUALITY, second adder,

11, the first adder 12, the shaper 13 of the reset pulse, the program setting unit 14, the comparison unit 15, multiplexer 16, the 2-2NE-2ILI element 17, the anticipation command generation unit 18, the second element 19 EQUALITY, the control unit 20. driven, decoder 21 high-order bits, switch 22, element 23. 35 BAN.

Block 3 contains the element 2-2--2-2I-4ida 24 element 2-2-2-2'I4IYAYI 25 and trigger 26.

- Elok 4 contains the first element 2I-NOT 27, the second element 2I-NOT 28, the trigger 29, the element OR-NOT 30, the Third element 2I-NOT 31, the fourth element 2I-NOT 32 and the fifth element 2I-NOT 33. * ⁵

Block 18 contains a BANNER element 34, the first multiplexer, 35 with direct outputs, the second multiplex. sor 36c inverse outputs, adder 37, program master 38 50

and p-schemes 39 comparison.

FIG. 1-5 and in the text of the description are designated Р · - sequences of impulses output by the reading unit, - the read signal $ 5

single risks of the feedback sensor scale; V - signal of the direction of movement of the object being moved;

_MF direction control signal; reversible counter accounts; ID signal control direction of the drive; N - counting pulses

A is the coordinate specified by the program setting block; 2А 7 doubled value of coordinate A; B - the value accumulated in the reversible counter; C is the result of summing up the values 2A and B, X is the result of switching information} P _V is the deciphered signal of the counter zero state, ϋ df is the deciphered signal of the zero state of the most significant digits of the given coordinate; To the sign of the task coordinates, 0 _p - the signal to determine the zone of location of the moving object; Y is a signal of inequality; 5 - equality signal} stop control signal

³ Prioritization; V. - anticipatory commands generated by the block of the formation of the anticipatory commands, V-anticipating commands, generated by the block of the formation of the anticipating commands;

Ζ - prohibition signal, K - signal for setting a reversible counter to zero.

The numerical control device operates as follows. .

In sensor 1, which is a photoelectric measuring transducer of angular or linear displacements, when the position of its mechanical link changes, a variable luminous flux occurs. Measuring information in sensor G is obtained as a result of a series of successive transformations: which is then converted into a change in the electrical quantity by means of a photodetector. After amplification and the formation of the corresponding circuits of sensor 1, this the signal is issued in the form of a rectangular pulse.To determine the direction of movement of the object, use (at least) two-fold reading / from the same scale of the photoelectric measuring transducer. At that, two reading slits are placed side by side at a distance T (1/4 + n) relative to the other ( where T is the scale step, η is an integer), As a result, two electric signals are obtained that are shifted in phase by 90 °! (Р ;, where ϊ =

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^a 1,2). When moving a moving object in one direction, the first sequence of rectangular pulses is ahead of the second sequence, and when moving an object in the other direction, the second sequence is ahead of the first sequence of pulses T / 4. In addition, in sensor 1, a single risk of the photoelectric converter scale is read. The rectangular signal P _p is output to the feedback sensor only once during the entire length of the object movement. 15 Moreover, the formation of this rectangular pulse is strictly connected with the coordinate zero of the system. From the outputs of the sensor 1, the signals P; (where ΐ = 1, 2) is fed to the inputs of the shaper 20 of level 2, and the signal Pp is fed to the input of the shaper 13.

In the imaging unit 2 on the front and rear edges, the pulse sequences Ϊ5 arriving at it

P, impulses Ν _{κ are formed} . For one period of any sequence produced K pulses with a fixed duration. The number of pulses in one period is K = 2 · ΐ, 30 where ί is the number of sequences, the sequence of generated pulses Ν, from the output of the former 2 arrives at the counting input of the counter 7. In addition, from the other outputs of the former 2, the inputs of the unit 3 receive the pulses _κ both direct and inverse signal 'P,.;

Unit 3 (Fig. 2), the inputs of which receive signals Ν _κ and direct and 40 inverse signals, produces a signal Y, determines the direction of movement of the object.

In the former 2, the counting pulses are delayed N. 4 $ The change in the value of the signal of direction V occurs earlier than the formation of counting pulses. When the direction of movement of the object from left to right, from the output of block 3, the 50 signal Y = 1 is taken, and when the object moves from the right - to the left - Y = 0.

Unit 4 generates a signal At the _SC, controlling the direction of the counting of the reversible counter, depending on 55 from the zone of location of the object being moved. Before starting, the device is brought to the point "0".

The state of the reversible counter 7 at this point is equal to zero, respectively. From the output of the decoder 6, the signal ¹ with the level of the logical unit arrives at the first input of element 2I-NOT 27 and the second input of element 2I-NOT 28. The state of the trigger 29 in this case depends on the value of the signal V element 2Y-NOT 27 arriving at the second input. When moving from the point “O” to the right, to the region of positive coordinate values, the signal value V = * 1 and trigger 29 is set to ”1”, and when moving to the left, to the region of negative values coordinates, the value of the signal Y = 0 and trigger 29 is set to “O”. Moreover, when the value of the state of the reversible counter is different from "0", the signal ϋβ0 ¹ 0 and the change in the value of the signal Y at the second input of element 2ИНЭ 27 does not change the value of the outputs of the trigger 29. When the object is in the zone of positive coordinates-. nat, arriving at the first input of element 2И-НЕ 32 from the output of trigger 29 "O", forms at its output, and therefore, at the second input of element 33, a signal equal to logical "1", and the value of this signal does not change from the value of the signal arriving to the second “input of this element from the output of the element NOT 30 when the signal Y changes. When N * G, the signal value at the output of element 2I-NOT 31, and therefore, at the first input of element 2I-NO 33, is equal to logical” 0 ", while from the output of the element 2I-NOT 33, the signal Ac is taken ^ “1. When U« = 0, the value of the signal at the output of the element and 31 2ND-YE becomes ravnvch logic "1" and the value Y _Cy = 0. In the positive coordinate value of the signal value Y coincides with the signal value Y _Cq. In finding the object in the region of negative values of the coordinate input to the first input 2I-NO element 31 from the trigger output 29, the zero level forms at its output, and therefore at the first input of element 2И-НЕ 33 a signal equal to the logical "G, and the value of this signal does not change from the value of the signal U arriving at the second input of element 2Y-NOT 31 When Y = 1 value of the output signal element 2I-NOT 32

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equal to the logical "1", while the signal = 0 is removed from the output of element 2I-NO 33. In the case of 14 = O, the signal value at the second input of element 2I-IE 32 becomes equal to 5 logical "1". With the output element 2I-NOT 33, the signal is removed 14. _and = 1.

In the area of negative coordinate values, the signal value 14 is opposite to the signal value of 14 _cm . In this way, block 4 controls the counting direction of the 7-meter counter. depending on the location of the object. Signal 14 _sch arrives at. the control input of the counter 7 and the input 15 of the first element 10 equivalence. ·

Multistage drive 5 is designed to 'move the working body of the equipment in accordance with the control' voltage, which is supplied from block 20. Drive 5 'is mechanically connected to sensor 1.

The up / down counter 7 reads the current coordinate while moving the object being moved, 25 To the counting, the input of the counter 7 from the former 2 receives counting 'pulses ,. the control input from block 4 receives the signal number _MF , and on. to the reset input 13 receives a signal shaper By laying down counter 7 to zero (condition. C 7 vyhodov'reversivnogo counter current coordinate information is applied to the inputs of decoder _{3 June} 9 decoder, a first adder 12, tin was ³⁵ ka and 15 comparing the multiplexer 16.

For visual observation of the coordinates of the movement of the object, the outputs of the counter 7 are connected to the decoder 9 ,. providing a decimal indication in block 8.

First-Element 10 EQUITY

produces a signal 0 _p definition

areas of 'being moved

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object ,. At 14 - 14 _{Sc, the} signal is 0 _p . = 1, which corresponds to the location of a moving object in the region of positive values of the coordinates, for example.

14 4 14 _MF signal 0 _p = 0, which corresponds to the location of the object in the region of negative values'. coordinates.

'·. The adder 11 produces the addition of · the values given by the coordinates And with. the same value A, _{$ 5} postupayu- conductive at its inputs .bloka T4 output value to twice the value of Ac adder outputs. 11 enters on

first summing inputs of the adder 12..

The adder 12 produces the addition ·. the summation result 2A by the adder 11 with the value of the current coordinate B arriving at the second summing inputs from the outputs of the reversible counter 7. From the outputs of the adder 12, the value of the sum C = 2A + B is fed to the second information inputs of the multiplexer 16.

The imaging unit 13 generates a pulse To reset the counter 7 to the zero state in the presence of a signal

and the corresponding value of the signal 14. When the object moves to the right (14 = 1), a pulse I forms. It occurs from the leading edge of the signal Ρ _β , and when the object moves to the left (14 = 0), a pulse, resetting K, is formed on the trailing edge of the signal. Thus, in the imaging unit 13, a signal K is generated for setting the counter 7 to zero-state along one edge of a single scale risk of the photoelectric converter, which is part of the feedback sensor 1.

With the help of block 14, a given coordinate is entered into the device. From the outputs of block 14, the data about the magnitude of the coordinates arrive at the second adder 11. the comparison unit 15 and the lead generation unit 18. The inputs of the decoder 21 with the outputs of the block 14 receives the data of the senior bits of a given coordinate. In addition, from the output of block 14 to the second direct input of element 2-2NE-I-2ILI 17 and to the input of element 19 equivalence is given the value K of the sign of the input number. In the device it is accepted: K = 1 - data are set in the area of positive values of coordinates, K = 0 - data are set in the area of negative values of coordinates.

Block 15 is a comparison circuit that generates a signal U for an inequality of a given program A, which comes from the information output of block 14 of the program’s task, and the current coordinate B coming from the output of the reversible counter 7. When A> B, block 15 produces a signal Y = 1, and when A <B the value of the signal Y = 0. The inequality output Y of block 15 is connected to

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the inputs of the element 2-2NE-I-2ILI 17 and the block 18 of the formation of teams of pre-emption. In addition, when A = B, block 15 generates a signal δ - stopping the drive, which is fed to the ban 23.

Multiplexer 16 performs

. switching information from two directions to one. When the control signal is Ζ = 0, information X = B is output from the multiplexer 16, and for а “1 - X '“ C.

. If the specified program is in the same area as the object being moved 0 _p = · = K - 1 (positive coordinate area), then the output value depends on the value of the Y signal. With Y = 1, the output value is ~ 1 "and at Y = About the value And _d = 0. If the given coordinate is in the negative region, in the same region as the object being moved, 0 _p · K = 0, then with Y ^and 1-Id = 0, and with Y = 0 - And _d =

= 1. In the case when the object to be moved 25 is located. In the negative region C _p = 0, and the coordinate is given in the positive region K = 1, then regardless of the signal value Y signal = 1, i.e. · 30 the object is transferred from the region of negative to the region of positive coordinate values, since the device assumes when Id = 1 the object moves from left to right, and when = 0 from right to left. If the object being moved is in the positive region 0 _p ³ 1, and the coordinate is set in the negative region K = 0, then regardless of the value of the signal, the value of the signal = 0, i.e. The object is transferred from the “region of positive to the region of negative coordinate values.

The outputs of the multiplexer 35 are connected to the inputs of the first amplifier of the adder 37, the inputs of the second term receive inverse information from the outputs of the second multi, plexor 36, Ch input of the transfer of the adder 37 constantly present potential with the level of logical units.

With Ζ. »0 the moved object is in the same coordinate area as the specified program. With

this value is X = B. If A> -B, then the value Y = 1 and from the output of element 34 BANKS the control inputs of multiplexers 35 and 36 are given a signal with a level of logical "1".

At the outputs of the multiplexer 35 and respectively at the inputs of the first term of the adder 37 there is information A in the direct code, and at the outputs of the multiplexer 36 and, therefore, at the inputs of the second term of the adder 37 there is information B in the inverse code. Since in the adder 37 is the addition of a larger number A in

Claims (1)

direct code with a smaller number B in the inverse code and a unit of transfer. This means that in the adder the operation subtracts from number A the number B and the result on its output is displayed in the direct code. When B <A, the value Y »0 and at the inputs of the sum / mouth 37 there is information * ch1sla B in the direct code and the number A in the inverse code. In the adder, the operation occurs. When-Ζ = 1, the value X = 2А + B, at the inputs of the adder 37 there is information of the number X in the direct code and the number A in the inverse code. In the adder 37, the number A is subtracted from the value X. The result of the subtraction operation "from the outputs of the <ator" is fed to the first inputs of the comparison circuits 39, on a comparison the inputs of which from the outputs of the programming setter 38 are programmed comparison values. the values of programmable values, the signals from the outputs of the comparison circuits 39 are removed with the logic level "O", and when the result of the subtraction operation is equal to or less than the values of the comparison quantities, the outputs of the circuits 39 are removed ignaly with the level of logic "1". If the object being moved is in the specified area 0р = 'К, then from the output of element 19 EQUALITY the signal with the level of logical zero is taken. When a moving object is located in one coordinate area and the coordinate is set in another area (0 _p = K), the Signal ELEVENESS signal is removed from the output of element 19 with a logic level of "1". Block 20, depending on the values of the incoming signals