JPH033017A - Temperature control completion detector - Google Patents

Abstract

PURPOSE:To shorten a judging time required up to the temperature control completion of an object controlling comparing the measured temperature of the object with a reference temperature, allowing a waiting time counting means to start the counting of the waiting time and instructing the completion of temperature control by the counting of the counting means. CONSTITUTION:A temperature measuring means 100 measures the temperature of a prescribed temperature control part of an object, e.g. an extruder, and a reference temperature setting means 101 sets up a reference temperature allowed as the temperature control completion temperature of the object. When the temperature of the object is measured by the means 100, a comparing means 102 compares the reference temperature with the measured temperature. When the measured temperature exceeds the reference temperature, the state is decided, the waiting time counting means 103 starts to count the waiting time based upon the decided result and instructs the completion of temperature control by its counting. Consequently, the judging time required up to the decision of temperature control completion of the object can be shortened.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a temperature adjustment completion detection device, for example.

The present invention relates to an improvement in a temperature adjustment completion detection device that detects whether or not temperature adjustment of a predetermined temperature adjustment portion in an extrusion molding machine is completed.

[Conventional technology]

Generally, in an extrusion molding machine, a predetermined temperature-controlled part, such as the extruder cylinder part, is heated to a set temperature, and after temperature adjustment is completed, the extrusion molding is performed by starting the motor that rotates the extrusion screw. I do.

Conventionally, as shown in FIG. 7, a device for detecting the completion of the temperature mWi of the temperature controlled part has been used to detect first and second heating completion temperatures SV- above and below a preset set temperature SV. α, SV+β are set and the temperature adjustment completion range is set between them, and a predetermined sampling period PI, P2.
When the measured temperature PV measured every time P, .

Note that the waiting time t is the time until the temperature of the part to be temperature-adjusted becomes stable, or the time until the entire temperature adjustment is completed when there are a plurality of parts to be temperature-adjusted.

Further, the temperature adjustment completion detection device is equipped with a display device that displays its operating state, and is configured to continuously display the screen from the start of the temperature raising operation to the completion of the temperature adjustment.

[Problem to be solved by the invention]

However, in the temperature adjustment completion detection device configured as described above, the measured temperature P in the temperature controlled part of the extrusion molding machine is
This is a case where V greatly overshoots beyond the temperature adjustment completion range.

When the sampling period becomes a long interval such as P1 followed by P3, it takes time to detect that the measured temperature P■ has entered the temperature joint completion range.

Therefore, the time to start counting the waiting time t is delayed, and it may take a long time to determine whether the temperature adjustment is complete.

Also, when the temperature adjustment completion range is narrowed.

As shown in FIG. 8, when there is a fluctuation called hunting in the measured temperature P2, the sampling period P.

There is a possibility that the measured temperature pv of ~P4... will not be within the temperature adjustment completion range forever, and there is an inconvenience that the temperature adjustment will not be completed for a long time.

In addition, in general, extrusion molding machines automatically raise the temperature unattended until the temperature adjustment is completed, and after the temperature adjustment is completed, extrusion molding is performed while checking various operating conditions on the display screen. In many cases, there is no need to display the screen until completion.

Therefore, if the screen does not need to be displayed continuously from the start of temperature raising operation to the completion of temperature adjustment of the temperature adjustment completion detection device, there is room for further improvement from the viewpoint of saving the power consumption of the display device and extending its life. There is.

The present invention was made under these circumstances.

It is an object of the present invention to provide a temperature adjustment completion detection device that can easily shorten the judgment time until determining that temperature adjustment has been completed for a controlled object.

Another object of the present invention is to provide a temperature adjustment completion detection device that improves the power consumption and life of the display means.

[Means to solve the problem]

In order to solve such problems, the present invention provides temperature measuring means 100. as shown in FIG. Reference temperature setting means 10
1. Comparison means 102 and waiting time counting means 103
It is configured with the following.

The temperature measuring means 100 measures the temperature at which a predetermined temperature adjustment of a controlled object, for example, an extrusion molding machine, is completed, and the reference temperature setting means 101 sets a reference temperature that is acceptable as the temperature adjustment completion temperature for the controlled object. It is.

The comparing means 102 compares the measured temperature with a reference temperature to determine whether the measured temperature exceeds the reference temperature, and the waiting time counting means 103 calculates a predetermined value based on the judgment of the comparing means 102. It starts counting the waiting time and instructs completion of temperature adjustment by counting up.

In addition to the configuration described above, the present invention also provides a display means 105 for displaying at least information related to the controlled object, and when the display means 105 is not in display operation, temperature adjustment is completed by the waiting time counting means 103. It can be configured to include a driving means 104 that drives the display means 105 for display.

[For production]

In the present invention equipped with such a means, the temperature measuring means 10
When the temperature of the controlled object is measured by 0, the comparison means 1
02 compares the reference temperature and the measured temperature, and determines if the measured temperature exceeds the reference temperature, and the waiting time counting means 103 starts counting the waiting time based on the judgment result. A count-up indicates that temperature adjustment is complete. That is, when the measured temperature of the controlled object exceeds the reference temperature, counting of the waiting time is started.

In addition, in the configuration including the drive means 104 and the display means lO5, when the display means 105 is not in display operation, at least information related to the controlled object is automatically displayed after the temperature adjustment by the waiting time counting means 103 is completed. Displayed on means 105.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram showing an embodiment of the temperature adjustment completion detection device according to the present invention.

In the figure, the temperature measuring device l is formed with a plurality of temperature sensors that measure temperature and an A/D conversion circuit (none of which is shown) that converts the measured analog signal from the temperature sensor into a digital signal. and is connected to the control device 3.

The temperature sensors 2 are disposed at predetermined temperature-controlled parts 9 of a conventionally known extruder 5, e.g. in a plurality of sections of an extruder cylinder (not shown), and are controlled under the control of a control device 3 at predetermined sampling intervals FjI, e.g. The temperature is measured every 2 seconds.

In this temperature measurement part, one location is one channel, and it is possible to measure temperature for multiple channels.

The control device 3 includes a CPU 7 having arithmetic and judgment functions, and a ROM 9 that stores the operating programmer J of the CPU 7.
and R, which temporarily stores the data of the calculation process of the CPU 7.
AMII and data input/output interface (T1
0) 13, etc., and constitutes the main part of a so-called microcomputer, and has the functions described below.

The control device 3 includes a key human power device 15. A storage device 17, an output device 19, and a display device 21 are connected.

The key human power device 15 operates under the control of the CPU 7 to set a set temperature SV, which will be described later. Second heating completion temperature S■-α, Sv+
β, sampling period, waiting time (, the CPU sends a selection instruction as to whether or not to use a temperature adjustment completion detection device for each channel.
7 while displaying it on the display device 21. The second heating completion temperature SV-α, SV+β, waiting time t, and others are set.

1st. The second temperature increase completion temperatures SV-α and SV+β are reference temperatures that are set at equal differences above and below the set temperature SV in the controlled portion and are allowed as the temperature adjustment completion temperatures; The range sandwiched between the second temperature increase completion temperatures SV-α and SV+β is the temperature adjustment completion range.

The storage device 17 stores the first data inputted from the key human power device 15.
．． It is an external storage means that stores various control conditions such as the second heating completion temperature SV-α, SV+β, sampling period, and waiting time t9 under the control of the CPU 7.

The output device 19 outputs control signals 9 from the control device 3, such as temperature increase and temperature decrease control signals and speed command signals to the motor, to the extruder 5.

The display device 21 is, for example, a conventionally known plasma display device or cathode ray tube display device, and displays the first and second heating completion temperatures S inputted from the key manual device 15.
It displays various operating states such as V-α, SV+β, waiting time t, measured temperature pv from the extrusion molding machine 5, output state of control signals to the extrusion molding machine 5, etc.
It is possible to switch screens during 0N10FF operation and ON operation of 2 screens under the control of .

FIG. 3 shows an example of the display format on the display device 21, and shows the measured value of the measured temperature pv, the set value of the set temperature SV, a deviation amount graph of the measured temperature pv against the set temperature SV, etc. for each temperature control target. This is what is displayed.

In addition, in FIG. 3, temperature (CI) l - temperature (CH) 8 is displayed on the screen as a temperature control target.

The control device 3 takes in the measured temperature pv at each sampling period described above, determines whether the measured temperature pv is an increased temperature with respect to the set temperature SV, and, if it is an increased temperature, completes the first temperature increase. It has a function of determining whether or not the temperature SVα has been exceeded, and if the measured temperature pv is a falling temperature, determining whether or not it has exceeded the second heating completion temperature SV+β.

In other words, the first temperature increase completion temperature SV-α functions as a temperature adjustment completion detection signal for the measured temperature pv when the temperature rises, and the second temperature increase completion temperature 5V-1β functions as a temperature adjustment completion detection signal for the measured temperature pv when the temperature decreases. Functions as a temperature adjustment completion detection line.

In addition, the control device 3 has a counter function, and the measured temperature pv
is the first. Second heating completion temperature SV-α.

When it is determined that SV+β has been exceeded, the display device 21 and the output device 19 start counting a predetermined waiting time, e.g., 0 to 360 minutes, and when the count-up is counted up, a display signal indicating that the heat-up, that is, the temperature adjustment is complete, is displayed on the display device 21 and the output device 19.
It is designed to output to.

Moreover, the control device 3 checks whether the temperature adjustment has been completed for each channel and indicates that the temperature adjustment has been completed for all channels.
Further, to output a boasting signal.

Some channels are configured to be selectable so as not to be subject to determination of completion of temperature adjustment.

Furthermore, the control device 3 controls the display device 21 when the temperature adjustment is completed.
Check the display operation of the display device 21, and if it is not displaying, turn on the display operation of the display device 21.

For example, it has a function of displaying the display contents shown in FIG. That is, the control device 3 also functions as a driving device for the display device 21.

Next, the operation of the above-mentioned temperature adjustment completion detection device of the present invention will be explained using the flowcharts of FIGS. 4 and 5.

First, as shown in FIG. 4, when the temperature adjustment (temperature increase) operation for the temperature control target part starts, it is determined in step 200 whether or not channel (CH) 1 is the target for temperature increase determination. If the answer is YES, it is determined in step 201 whether the measured temperature PV is a temperature increase operation or a temperature decrease operation.

Whether or not channel (CH) 1 is subject to temperature increase determination is as follows:
It is selected by the input setting from the key manual device 15 under the control of the control device 3 .

For example, as shown in FIG.
A temperature adjustment (temperature control) setting screen is displayed on the display device 21, and the presence or absence of temperature increase determination is set for temperature (CH) 1 to temperature (CH) 8 as temperature control targets. That is, "1" is entered in the "temperature increase determination" column to set determination presence.

In the case of temperature increase, step 201 becomes YES.

In the following step 202, a temperature raising process is performed, and in step 20
In step 3, it is determined whether the measured temperature pv has become equal to or higher than the first heating completion temperature S - α.

If the measured temperature pv is smaller than the first heating completion temperature SV-α, the answer in step 203 is NO and the process returns to step 202, and if the measured temperature pv has reached the first heating completion temperature S■-α or more Step 203 becomes YES, and step 206 detects that the first heating completion temperature SV-α line has been exceeded.

In step 207, it is determined that channel 1 has completed heating up.

If the temperature adjustment is to lower the temperature, the determination in step 201 is NO.
Then, in step 204, a temperature lowering process is performed, and in step 205, it is determined whether the measured temperature PV has become equal to or lower than the second temperature increase completion temperature SV+β.

If the measured temperature pv is greater than the second heating completion temperature SV+β, the answer in step 205 is NO and the process returns to step 204, and if the measured temperature pv is less than the second heating completion temperature S■+β, step 7 205 is YES and step 20
Move on to 6.

The above steps 200 to 207 are operations for one channel, and when performing a temperature adjustment completion detection operation for a plurality of channels, for example, eight channels, the same operations for eight channels are repeated.

Then, as shown in FIG. 5, it is determined in step 208 whether or not the temperatures of all channels have been raised to the same level.

In the case of No, step 208 is repeated, and in the case of YES, the process moves to step 209 to start counting the waiting time t, and in step 210 it is determined whether or not the count is up.

This waiting time t is determined by the key human power device 1 under the control of the control device 3.
The selection is made according to the input settings from 5.

If the Ste knob 210 is No, the process returns to step 209, and if the result of step 210 is YES, the process returns to step 211.
It is determined whether or not the display device 21 is currently displaying the screen. If YES, the temperature rise is completed and the operation is stopped. If step 211 is No, the control device 3 is controlled in step 212. At the bottom, a screen display process is performed on the display device 21, and the temperature rise is completed.

In addition, in the above-mentioned embodiment, the 1st. Second heating completion temperature SV
-α and SV+β are not limited to being set at equal differences above and below the set temperature SV, but can also be set at different deviations from the set temperature SV. Furthermore, the set temperature SV
It is also possible to set it as an arbitrary reference temperature for the measured temperature pv without setting it.

〔Effect of the invention〕

As explained above, the present invention compares the measured temperature of the controlled object measured by the temperature measuring means with the reference temperature set by the reference temperature setting means, and the measured temperature exceeds the reference temperature. λ, the waiting time counting means starts counting the waiting time, and the count up indicates that the temperature adjustment is complete, so even if the measured temperature is outside the temperature adjustment completion range, the - degree measured temperature is the standard. This is compared to the conventional example in which counting of the waiting time t is started when the temperature exceeds the temperature, and counting of the waiting time t is not started unless the measured temperature falls within the temperature adjustment completion range.

The time required to determine the temperature adjustment for the controlled object is shortened.

Furthermore, even if hunting occurs in the measured temperature under a condition where the temperature adjustment completion range is narrow, it is possible to similarly determine whether the temperature adjustment is complete in a short period of time.

Furthermore, in a configuration including a drive means and a display means, in addition to the above-mentioned effects, the display screen is automatically turned on after temperature adjustment is completed, so it is possible to reduce the power consumption of one display means and improve its life. .

[Brief explanation of the drawing]

FIG. 1 is a diagram corresponding to complaints according to the present invention, FIG. 2 is a block diagram showing an embodiment of the temperature adjustment completion detection device according to the present invention, and FIG. 3 is a diagram showing an example of a display screen in the present invention.
4 and 5 are flowcharts explaining the present invention in detail, FIG. 6 is a diagram showing a setting screen for determining whether or not to increase the temperature of a temperature controlled object, and FIGS. 7 and 8 are detailed explanations of the present invention. This is a diagram. 1・・・・・・・・・・・・・・・・・・Temperature measuring device 3・・・・・・・・・・・・・・・・Control device 5・
・・・・・・・・・・・・・・・・・・Extruder 7・・・・・・
・・・・・・・・・・・・・・・CPU15・・・・・・
......Key human power device 17...
.........Storage device 19...
・・・・・・・・・・・・Output device 21・・・・・・・
......Display device 100...
・・・・・・・・・Temperature measurement means lot・・・・・・・・・
......Reference temperature setting means 102...
......Comparison means 103...
...Waiting time counting means 104...
...... Drive means 105 ......
...Display means patent applicant Rika Kogyo Co., Ltd. Agent Patent attorney Miharu Saito 113 Figure Figure Figure Figure Figure Figure

Claims (2)

[Claims] (1) a temperature measuring means for measuring the temperature of a controlled object; a reference temperature setting means for setting a reference temperature that is acceptable as a temperature adjustment completion temperature for the controlled object; and comparing the measured temperature and the reference temperature to Comparing means for determining whether the measured temperature exceeds a reference temperature; and waiting time counting means for starting counting a predetermined waiting time based on the determination of the comparing means and instructing completion of temperature adjustment by counting up. A temperature adjustment completion detection device comprising: (2) a display means for displaying at least information related to the controlled object; and a drive means for driving the display means to display when the display means is not in display operation, in response to an instruction for completion of temperature adjustment by the waiting time counting means; The temperature adjustment completion detection device according to claim 1, comprising:.