JPS61220002A - Setting device - Google Patents

Abstract

PURPOSE:To make a troublesome procedure at the time of switching an operation place unnecessary by sampling outputs of plural setting devices by the prescribed period so as to calculate a change amount signal and forming a reference value based on said signal. CONSTITUTION:Casting speed setting devices 1 and 2 divide the prescribed voltages and output speed setting signals S1 and S2. Receiving said signals, change amount detectors 3 and 4 sample the signals S1 and S2 by the prescribed period, calculate a deviation between the previous sample value and the current one and output it as change amount signals S3 and S4 until the next sample time. An operation place switching device 5 selects either one of the signals S3 and S4 and applies it to an integrator 6. It integrates the selected change amount signal and applies it as a reference signal S6 to a speed controller 14. Thus the troublesome procedure at the time of switching the operation place can be unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a setting device suitable for setting the casting speed of continuous casting equipment, for example.

[Technical background and problems of the invention]

In continuous casting equipment, casting speed setting devices are installed on the side where the metal is poured into the mold and on the side where it is pulled out from the mold.
Either one becomes effective depending on the operation location switch. A dial-type variable resistor is used as the casting speed setting device, which has the advantage that the operator can easily set the casting speed by touch while monitoring the level of pig iron in the pouring hole.

FIG. 5 is a circuit diagram showing the configuration of a conventional casting speed setting device. In FIG. 5, a casting speed setting device 11 provided on the side for pouring into the mold and a casting speed setting device 12 provided on the side for pulling out from the mold are dial type variable resistors of the same type. It is used. The operation location changeover switch 13 selects either one of the casting speed setting signals S11 and S12 set by the casting speed setting devices 11 and 12, and adds this to the speed control device 14 as a casting speed reference signal s13. There is.

Here, the operation location changeover switch 13 is operated when an operator on the casting side delegates setting of the casting speed to an operator on the drawing side, and cannot be operated from the drawing side.

By the way, in this type of control system, there is a risk that the system will be confused if the casting speed reference signal s13 is suddenly changed. The output levels of both had to match each other. For this reason, communication devices were used to communicate the positions of the dials, but even if the positions matched, there was no guarantee that the output levels would match.
In order to ensure greater accuracy, it was necessary to detect the difference between the two using a differential amplifier or the like and report the deviation. Thus, the conventional casting speed setting device has the disadvantage that it requires special equipment for mutual communication and error detection, and also requires complicated procedures.

[Purpose of the invention]

The present invention has been made to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide a setting device that can eliminate the need for complicated procedures when switching an operation location and a special device for the same, and can significantly improve operational performance.

[Summary of the invention]

In order to achieve this objective, the setting device of the present invention includes a plurality of setting devices, samples the outputs of these setting devices at a predetermined period, and calculates the amount of change between the previous sampling value and the current sampling value. a plurality of change amount detection means for calculating the change layer signal and outputting the change layer signal until the next sampling time; a selection means for selecting one of these change amount detection means; and a selection means for selecting one of these change amount detection means. and an integrating circuit for integrating the output of the change amount detecting means, and the output of the integrating circuit is used as a set value.

[Embodiments of the invention]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Casting speed setters 1 and 2 each consist of an endless dial type variable resistor, which divides a predetermined voltage to produce a casting speed setting signal S1. and S2 are output and applied to change amount detectors 3 and 4, respectively. The change amount detectors 3 and 4 are mainly composed of a microcomputer, and sample the casting speed setting signals S1 and S2 at a predetermined period, respectively, and calculate the deviation between the previous sampling value and the current sampling value. As a result, the casting speed variation signals S3 and S4 are output until the next sampling time. An operation location switch 5 serving as a selection means selects either one of these casting speed variation signals S3 and S4 and applies it to an integrator 6. This integrator 6
integrates the input casting speed variation signal and applies the casting speed reference signal S6 to the speed control device 14 described above.

On the other hand, an engineering unit converter 7 is provided which inputs the casting speed reference signal S6 and converts it into an engineering unit signal required by the operator, and its output signal is added to the numerical display section 8.

Further, a dial notch converter 9 is provided which inputs the casting speed reference signal S6 and converts it into a dial notch position signal matching the signal level, and its output signal is applied to the dial notch indicators 1b and 2b. There is.

The dial 1a, dial notch indicator 1b and numerical display section 8 of the above-mentioned casting speed setting device 1 are arranged as shown in FIG. That is, a large number of light emitting diodes as a dial notch indicator 1b are arranged around the outer periphery of the dial 1a, and furthermore, a numerical display section 8 is arranged above the dial 1a (at the top of the drawing). Further, the dial 2a (not shown) of the casting speed setting device 2, the dial notch indicator 2b, and the numerical value indicator 8 are also arranged in a similar relationship.

The operation of this embodiment configured as described above will be explained below with reference to FIGS. 3 and 4.

First, since the casting speed setters 1 and 2 are endless variable resistors, the rotation angle of the dial and the casting speed setting signal s1. s2 has the relationship shown in FIG.
Immediately after reaching 0[V], it becomes O[V], and then O[
V] increases again. During this process, the casting speed setting signal 8
Even if 1.82 changes from 8 [■] to 1 [■], in this example the casting speed r! is reduced by 3 [■]! 1 standard S6 is raised.

Conversely, when the dial is rotated in the deceleration direction (CCW direction), the casting speed setting signal s1°S2 becomes the minimum 0[
Immediately after reaching the maximum of 10 [V], then 1
It decreases again from 0 [V]. During this process, the casting speed setting signal s1. Even when s2 changes from 1 [V] to 8 [V], the casting speed standard S6 is lowered by 3 [■] in this embodiment.

Therefore, the change amount detector 3.4 detects the casting speed setting signal s1.
．． Sampling s2 at a predetermined period, and calculating the amount of change corresponding to the difference in the rotation angle of the dial based on the amount of change between the previous sampling value and the current sampling value,
This variation signal is output until the next sampling time. This will be explained in the case of the change m detector 3 using the flowchart of FIG.

First, in step 101, the previous sampling value 51-1
Calculate the deviation ΔS1 between and the current sampling value s1,
In step 102, it is determined whether the maximum point has been exceeded in the acceleration direction by comparing the deviation Δs1 with - (SMAX is the maximum input value of the casting speed setting signal Sl), and further, in step 1
At 03, it is determined whether or not the maximum point has been exceeded in the deceleration direction by comparing the deviation ΔS1 with the +" value. As a result of this determination, if none exceeds the maximum point, the deviation obtained in step 101 is output as the casting speed change amount signal s3.

As a result of the determination in step 102, if the maximum point has been exceeded in the acceleration direction, SMAX+ΔS1 is calculated in step 105, and the result is used as the casting speed change amount signal S3. As a result, the casting speed setting signal changes to 8 [■
] to 1 [V], a casting speed change amount signal S3 of 3 [V] is output.

On the other hand, as a result of the determination in step 103, if the maximum point has been exceeded in the deceleration direction, Δs1-SMAX is calculated in step 106, and the result is used as the casting speed change amount signal S3.

As a result, the casting speed setting signal is in the deceleration direction (CCW direction)
When the voltage changes from 1 [■] to 8 [V], -3 [■]
A casting speed change amount signal S3 is output.

Next, in step 104, the current sampling value is stored for the next deviation calculation.

Incidentally, the change m detector 4 also performs a similar operation and outputs a casting speed change amount signal S4.

The thus obtained casting speed change amount signal s3. s4
Either one is selected by the operation location changeover switch 5, and then integrated by the integrator 6 and inputted to the speed control device 14 as the casting speed reference signal S6.

Further, this casting speed reference signal S6 is converted by an engineering unit converter 7 into an engineering unit required by the operator, and then displayed on a numerical display 8.

The casting speed reference signal S6 causes the dial notch converter 9 to light up the light emitting diode at the position of the dial notch indicator 2b that corresponds to the casting speed reference. In this case, the display states of the casting speed setters 1 and 2 are linked.

Thus, when the operation location changeover switch 5 is operated, if the dial of the newly selected casting speed setter is not operated for a predetermined period of time, the casting speed reference signal S6 before switching will be used as is in the speed control device. 14. Then, when the dial of the casting speed setting device is operated on the newly selected side, the casting speed reference signal S6 is increased or decreased in accordance with the operated rotation angle.

In addition, in the above embodiment, an endless variable resistor is used as the casting speed setting device, and even if the divided voltage output of this variable resistor changes from the maximum to the minimum or from the minimum to the maximum, the rotation of the dial will not change. Although the configuration is configured to output a variation signal corresponding to the angle, if a variable resistor with a sufficiently wide adjustment range is used as the casting speed setting device, the previous It is sufficient if there is a change amount detection means configured to calculate the amount of change between the sampled value of and the current sampled value and output the change m signal until the next sampling time.

Additionally, although the above embodiment describes a casting speed setting device for continuous casting, the present invention can be applied to any control system configured in which one of a plurality of setting devices is selected and added to the control device. be.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the outputs of a plurality of setting devices are sampled at a predetermined period to output change amount signals, and any one of these change amount signals is selected. Since the signal is integrated and used as the reference value, the complicated procedure when switching the operating location, which was considered a problem with conventional equipment, is eliminated.
This has the effect that a special device for this purpose can be made unnecessary and that operational performance can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of an embodiment of the present invention, Fig. 2 is a layout diagram of the main elements of the embodiment, Fig. 3 is a characteristic diagram of the main elements of the embodiment, and Fig. 4 5 is a flowchart for explaining the operation of the same embodiment, and FIG. 5 is a circuit diagram showing the configuration of a conventional casting speed setting device. 1.2... Casting speed setter, 3.4... Variation amount detector, 5... Operation location switch, 6... Integrator, 8...
・Numeric display, 1a...dial, 1b, 2b...
Dial notch indicator.

Claims (1)

[Claims] 1. A plurality of setting devices and the outputs of these setting devices are each sampled at a predetermined period, and the amount of change between the previous sampling value and the current sampling value is calculated, and the amount of change is calculated. a plurality of change detection means for outputting signals until the next sampling time; a selection means for selecting one of these change detection means; and a change detection means selected by the selection means. 1. A setting device comprising: an integrating circuit for integrating the output of the means; and using the output of the integrating circuit as a reference value. 2. The setting device is an endless variable resistor that divides the voltage, and the variation detection means outputs a rotation angle variation signal based on the voltage division value of the variable resistor. A setting device according to claim 1.