SU756376A1 - Device for adjusting pointer measuring instruments - Google Patents

Description

The invention relates to automatic control and regulation and can be used for automatic selection of the nominal values of the adjusting elements of analog measuring instruments.

A device containing a pulse generator, a control unit connected to an input source and a chain of component elements connected to the input of the studied electric circuit, changes the output parameter of the studied electric circuit by changing the parameters included in this scheme of the component elements I).

The disadvantage of the device lies in the fact that it does not allow to fully automate the process of selecting the nominal values of component elements, in which the output parameter of the electrical circuit meets the specified requirements.

It is also known a device for modeling electronic circuits, containing a sensor of uniformly distributed random numbers, a decoder, the input of which is connected to the output

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sensor of uniformly distributed random numbers, OR element, AND element, the first input of which is connected to the output of the OR element, the second input - with the output of the pulse generator, switch, control unit, the first output of which is connected to the sensor input of uniformly distributed random numbers, the second output the input of the switch, the clock generator, the input of which is connected to the third output of the control unit, the feedback element, the input of which is connected to the output of the And, And memory counters element, the first inputs of which are connected with the switch output, the second inputs - with the output of the control unit, and the third inputs - with the output of the AND, AND comparison units, the first inputs of which are connected to the outputs of the memory counters, respectively, P playback counters, the outputs of which are connected to the second inputs of the comparison units, respectively inputs - to the output of the clock pulse generator, and reversible counters, the first inputs of which are connected to the switch output, the second inputs - to

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the first output of the control unit, and the third inputs - with the output of the element And, C of typed fields, the inputs of which are connected to the outputs of reversible counters, respectively, AND the blocks of initial values of the parameter and And the blocks of current values of the parameter, the first inputs of which are connected to the output of the feedback element, the second inputs to the output of the switch, third to the first output of the control unit, fourth inputs to the output of the decoder, and outputs to the inputs of the OR element [2].

A disadvantage of this device is also the impossibility of fully automating the process of selecting the values of components, elements.

The purpose of the invention is to automate the process of setting up dial gauges,

This goal is achieved by the fact that in a device for setting up dial gauges, containing a pulse generator, a control unit connected to a reference signal source, I chains consisting of a counter connected in series, a decoder and a dial-in field, the output of each of which is connected to the corresponding the input of the custom measuring device, introduced PP photoelectric sensors installed on the path of movement of the arrow of the galvanometer u, of which are connected through amplifiers-shaped ate with the respective inputs of the control unit,

And the elements And, the first inputs of which are combined and connected to the pulse generator, the second inputs - to the corresponding outputs of the control unit, and their outputs are connected to the inputs of the counters and a controlled mechanism of rotation of the galvanometer body, made in the form of a rotary platform that engages with a worm shaft, connected through a coupling clutch with the shaft of an electric motor connected to a power source through a switching element connected to the (m + 1) -th photoelectric sensor installed at the zero scale device .

FIG. 1 shows a block diagram of a device for adjusting dial gauges; in fig. 2 is a block diagram of one of the possible variants of the execution of the ίth circuit of the dial field for resistors.

The device for setting the dial gauges contains a 1 · pulse generator, a control block 2 connected by outputs to the second inputs of elements 3 And, the first inputs of which are combined and connected to a pulse generator, I of counters 4, whose inputs are connected to the outputs of the And circuits, and the outputs are connected to the inputs of the corresponding decoders 5, the outputs of which are connected

to circuits 6 type fields, the reference source 7 input signals, the inputs of which are connected to the corresponding outputs of block 2

. controls, photoelectric sensors 8,

³ arrows in the path

galvanometer and connected via amplifiers 9 with the corresponding inputs of the control unit 2, turntable

₁₀ 10, which is engaged with a worm shaft, 11, which through a coupling 12 is connected with the shaft of an electric motor 13 connected via switching element 14 to a power source 15, a tunable electrical device 16, to the corresponding inputs of which are connected the outputs of the chains of diagonal fields and the output reference source> chic 7 input signals, galvanometer 17, mounted on a turntable, to the switching

₂₀ keys 18 installed in chains of type-setting fields and controlled by decoders.

The principle of operation of the proposed device is as follows.

Before setting up, into electrical

23 scheme of a custom electrical device 16 instead of the elements, the values of which must be selected during adjustment, connect the outputs of the circuits of 6 type fields.

On these circuits there are 6 typed fields of the dial, ·, there are rows of 1 <elements, instead of which there are chains of 6 typed fields. The “denominations” of the series are calculated on the basis of the minimum and maximum possible values of the nominal of the selected element and the value of the number “k · Galvanometer 17 is set to

³⁵ rotary platform 10. The first W photoelectric sensors 8 are installed in those places on the path of movement of the arrow of the galvanometer 17 tunable measuring device 16, which should be taken by the arrow of the glanometer 17 with fixed signals produced by the reference source 7 input signals, and ("and + 1) - The first photoelectric sensor 8 is set at zero, i.e. in the place where the arrow of the galvanometer 17 should be in the absence of an input signal. After these preparatory operations, the device is ready for operation.

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The operation of the device begins with a reversal of the galvanometer 17 until the arrow coincides with the zero mark of the scale of the adjustable device 16, where the (M + 1) -th is installed

₅₅ photoelectric sensor 8. In the absence of a signal from the output (GP + 1) of the photoelectric sensor 8, the switching element 14 connects the power source 15 to the power supply circuit of the electric motor 13. Electric motor 13

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through the clutch 12 gears rotates the worm shaft 11, which, in turn, unfolds, with him in engagement, a turntable 10, on which the galvanometer is mounted 17. As soon as the arrow of the tal-5 vanometer gets into the area of the (PTN) -th photoelectric sensor 8, the switching element 14 will disconnect from the power supply circuit _ of the electric motor 13, the power supply source 15. thus fixing the position of the galvanomet- <6 pa 17 tunable device 8.

After the termination of the orientation of the galvanomet- блок ra 17, the control unit 2 issues commands for the outputs 1 k (it + 1). The command from output 1 is fed to the first input of the reference source 55 of the input signals; as a result of this, the first input level is formed at its output — for the tunable signal device 16. The command from the (Ch + 1) th output of the control unit 2 goes to the second input of the first element of the 3rd, as a result, the pulses from the output of the generator 1 begin to flow through the first element 3 and to the input of the first counter

4. As the pulses are recalculated by the first counter 4, using a decoder 5 and a circuit 6 25

16 in the first circuit 6 of the inset field, elements of certain denominations are connected in turn. This occurs as long as the arrow of the galvanometer 17 of the instrument being configured is 16 30

the first photoelectric sensor 8 does not fall into the range. When the arrow of the galvanometer 17 enters the range of the first photoelectric sensor 8, the corresponding amplifier 9 will generate a signal to the first input of the control unit 2, indicating that the element the accuracy of the position of the arrow of the galvanometer 17 at the first signal level from the output of the reference source 7 input signals. After the signal from the first photoelectric sensor 8 arrives at the first input of the control unit 2, the latter forms commands at the 2nd and (gi + 2) th output, i.e. proceeds to 45 selection of the nominal value of the second element, which determines the accuracy of setting the device 16 at the second signal level from the output of the reference source 7 input signals. At the same time, in custom device 16, from the first circuit 6 50

the dial pad remains connected element with a nominal value, in which the arrow of the galvanometer 17 was in the range of the first photoelectric sensor 8, at the first level of the signal from the output of the reference 55

source 7 output signals. The process of selecting the denominations of the elements for the second and subsequent positions of the arrow of the galvanometer 17 (total U positions of the arrow), at appropriate signal levels from the output of the reference source 7 of the input signals, is similar to that described above for the first position.

After the selection of the nominal of the element for the Pt position of the arrow of the galvanometer 17 is determined, for example, by indicating the states of the counters or typed fields, selected as a result of tuning the nominal elements, which are then connected to the electrical circuit of the tunable device 16 instead of the corresponding typed fields.

Claims (2)

Claim 1. A device for setting up dial gauges, comprising a pulse generator, a control unit connected to a reference signal source, and circuits consisting of a counter connected in series, a decoder and a dial-up field, the output of each of which is connected to the corresponding input of a custom measuring device, characterized by the fact that “with the automation circuit of the adjustment process, M photoelectric sensors installed in the path of the arrow of the galvanometer, (n of which ^ Comm Nena conditioners via amplifiers to corresponding inputs of the control unit, And the elements And, the first inputs of which are connected and connected to the Pulse generator, the second inputs - to the corresponding outputs of the control unit, and their outputs are connected to the inputs of the counters and a controlled mechanism for turning the galvanometer body. 2. Device by π. 1, characterized in that the controlled mechanism of rotation of the galvanometer body is made in the form of a rotary platform which engages with a worm shaft connected through a gear coupling with a hacking motor connected to a power source through a switching element connected to (Gu) + 1) photoelectric sensor mounted on the zero scale of the instrument.