JP5358470B2 - State evaluation apparatus and state evaluation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To evaluate the heat-retention state of a heating device or a cooling-retention state of a cooling device by utilizing only state amounts managed by a temperature control device. <P>SOLUTION: A state evaluation apparatus includes: a manipulated variable MV acquisition part 1 for acquiring a manipulated variable MV; a manipulated variable integral value calculation part 2 for calculating an integral value MV_S of the manipulated variable MV; a temperature set point SP acquisition part 3 for acquiring a temperature set point SP; an ideal manipulated variable output value calculation part 4 which, while using the integral value MV_S of the manipulated variable MV and the temperature set point SP as input values, calculates an ideal manipulated variable output value MV_R which is a manipulated variable to be output in a normal heat-retention state of the heating device; a heat-retention characteristic determination part 5 which, when the manipulated variable MV is deviated from the ideal manipulated variable output value MV_R by a specified width or more, determines that the heat-retention property of the heating device is in an abnormal state; and a determination result output part 6 for notifying an operator of a result that the heat-retention property of the heating device is in the abnormal state. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a state evaluation apparatus and a state evaluation method for evaluating a heat retention state of a heating device or a cold state of a cooling device.

A temperature control device such as a temperature controller may be instrumented in a device using an electric heater or the like. In the temperature control device, an instruction value that becomes an output of the electric heater is calculated as an operation amount MV.
Due to the recent increase in demand for energy saving, efforts are being made to increase the heat retention in the chamber of the heating device, increase the cold retention in the chamber of the cooling device, and reduce the power used for heating and cooling.
With such a trend, efforts are being made to simply estimate power using a temperature control device and manage the heating state of the device (see Patent Document 1).

JP 2009-229382 A

  Failure to close the gate for putting in or out the object to be heated or cooled in the chamber due to an error in manual change of the device control sequence or manual change of the parameter value during the operation of the gate (a gate that does not go through complete shielding in a special mode) Open state) or forgetting to stop air purge to reduce the time when the temperature is lowered from a high temperature state (purging state that does not go to complete stop by special mode), etc., than the power consumption assumed at the time of design A lot of electric power will be used.

  In order to prevent such an increase in power consumption, the technique disclosed in Patent Document 1 is applied to monitor the instantaneous value of power consumption, and an alarm is generated when the instantaneous value of power usage exceeds a threshold value. It can be considered to emit. However, even in the case where the heat retaining property and the cold retaining property are enhanced in a normal apparatus, the effect of the heat retaining or the cold retaining tends to change gradually with the passage of time, and the threshold value cannot always be determined simply.

  There is also a method to detect the gate opening and air purge level with an additional sensor and display it so that the operator can confirm it. However, since it is necessary to add a sensor for that purpose, it becomes a negative material in equipment manufacturing cost and structural design . Needless to say, an unexpected situation cannot be detected as long as the cause of the power usage not being as expected is other than that which can be detected by the sensor.

  The present invention has been made to solve the above-described problem, and can use only the state quantity managed by the temperature control device to evaluate the heat insulation property of the heating device or the cold insulation property of the cooling device. An object is to provide an evaluation device and a state evaluation method.

  The state evaluation apparatus of the present invention includes an operation amount acquisition unit that acquires an operation amount from a temperature control device that performs temperature control of a heating device or a cooling device, and an operation that calculates an integrated value of the operation amount in a predetermined time range. The amount integrated value calculation means, the temperature set value acquisition means for acquiring the temperature set value from the temperature control device, and the normal warming state of the heating device using the integrated value of the manipulated variable and the temperature set value as input values An operation amount output value calculating means for obtaining an ideal operation amount output value that is an operation amount output in the normal cooling state of the cooling device or an operation amount acquired by the operation amount acquisition means. Characteristic determining means for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the output amount deviates from the ideal operation amount output value by more than a specified width, Integration time of calculation values is characterized in that which is set to be longer than the time constant of the cold properties of the cooling chamber of the time constant or the cooling device of the thermal insulation properties of the heating chamber of the heating apparatus.

  In addition, the state evaluation apparatus of the present invention calculates an operation amount acquisition unit that acquires an operation amount from a temperature control device that controls the temperature of the heating device or the cooling device, and calculates an average value of the operation amount for a predetermined number of integrations. An operating amount average value calculating means, a temperature setting value acquiring means for acquiring a temperature setting value from the temperature control device, and an average value of the operating amount and the temperature setting value as input values. An ideal manipulated variable output value calculating means for obtaining an ideal manipulated variable output value that is an manipulated variable that is output in the heat insulation state or an operation amount that is output in the normal cooling state of the cooling device, and the operation acquired by the manipulated variable acquisition means Characteristic determining means for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the amount deviates from the ideal manipulated variable output value by a specified width or more, The number of times is set such that the accumulated time of the operation amount for this number of times is longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the heat retention characteristic of the cooling chamber of the cooling device. It is what.

  In addition, the state evaluation apparatus of the present invention includes an operation amount obtaining unit that obtains an operation amount from a temperature control device that controls the temperature of the heating device or the cooling device, and an operation that calculates an operation amount damping value obtained by damping the operation amount. An amount damping value calculating means, a temperature setting value obtaining means for obtaining a temperature setting value from the temperature control device, the manipulated variable damping value and the temperature setting value as input values, and in a normal temperature maintaining state of the heating device An ideal operation amount output value calculation means for obtaining an ideal operation amount output value that is an operation amount that is output or an operation amount that is output in a normal cold state of the cooling device, and the operation amount that is acquired by the operation amount acquisition means Characteristic determination means for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the output amount deviates from the ideal manipulated variable output value by more than a specified width The damping time constant of the damping process is set to be longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the cold insulation characteristic of the cooling chamber of the cooling device. To do.

In addition, one configuration example of the state evaluation device of the present invention further includes a determination result output means for notifying an operator that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state. It is what.
Moreover, in one configuration example of the state evaluation device of the present invention, the ideal manipulated variable output value calculating means stores the input value and the ideal manipulated variable output value in association with each other, or the ideal value from the input value. The ideal manipulated variable output value is obtained by a mathematical expression for calculating the manipulated variable output value.
Moreover, one configuration example of the state evaluation device of the present invention includes a temperature measurement value acquisition unit that acquires a temperature measurement value from the temperature control device instead of the temperature set value acquisition unit, and calculates the ideal manipulated variable output value. The means is characterized in that the ideal manipulated variable output value is obtained using the temperature measurement value instead of the temperature set value.

  Further, the state evaluation method of the present invention calculates an operation amount obtaining step for obtaining an operation amount from a temperature control device that controls the temperature of the heating device or the cooling device, and calculates an integrated value of the operation amount in a predetermined time range. An operation amount integrated value calculation step, a temperature set value acquisition step for acquiring a temperature set value from the temperature control device, and the operation amount integrated value and the temperature set value as input values. An ideal manipulated variable output value calculating step for obtaining an ideal manipulated variable output value which is an manipulated variable output in the heat insulation state or an manipulated variable output in the normal cooling state of the cooling device, and the manipulated variable is the ideal manipulated variable output A characteristic determination step for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the value deviates from a value by a specified width or more, and the operation amount Integration time of the integrated value is characterized in that which is set to be longer than the time constant of the cold properties of the cooling chamber of the time constant or the cooling device of the thermal insulation properties of the heating chamber of the heating apparatus.

  Further, the state evaluation method of the present invention calculates an operation amount acquisition step for acquiring an operation amount from a temperature control device that controls the temperature of the heating device or the cooling device, and calculates an average value of the operation amount for a predetermined number of integrations. The operation amount average value calculating step, the temperature setting value acquisition step for acquiring the temperature setting value from the temperature control device, the average value of the operation amount and the temperature setting value as input values, and the normality of the heating device An ideal manipulated variable output value calculating step for obtaining an ideal manipulated variable output value which is an manipulated variable output in the heat insulation state or an manipulated variable output in the normal cooling state of the cooling device, and the manipulated variable is the ideal manipulated variable output A characteristic determination step for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the value deviates by more than a specified width from the value. Is characterized in that the accumulated time of the manipulated variable for this number of times is set to be longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the heat retention characteristic of the cooling chamber of the cooling device. To do.

  The state evaluation method of the present invention includes an operation amount acquisition step of acquiring an operation amount from a temperature control device that controls the temperature of the heating device or the cooling device, and an operation of calculating an operation amount damping value obtained by damping the operation amount. In a normal warming state of the heating device, the amount damping value calculating step, the temperature setting value obtaining step for obtaining the temperature setting value from the temperature control device, the operation amount damping value and the temperature setting value as input values An ideal operation amount output value calculating step for obtaining an ideal operation amount output value that is an operation amount that is output or an operation amount that is output in a normal cold state of the cooling device, and the operation amount is defined from the ideal operation amount output value A characteristic determination step for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when it is out of width or more. The damping time constant of the damping process is set to be longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the heat retention characteristic of the cooling chamber of the cooling device. Is.

  According to the present invention, the operation amount acquisition means, the operation amount integrated value calculation means, the temperature set value acquisition means, the ideal operation amount output value calculation means, and the characteristic determination means are provided, and the operation amount integration value is integrated. By setting the time to be longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the heat retention characteristic of the cooling chamber of the cooling device, the gate opening degree and the air purge level are set in the heating device or the cooling device. Without adding a sensor or the like to be detected, only the operation amount and the temperature setting value, which are state quantities managed by the temperature control device, are used to evaluate the heat insulation property of the heating device or the cold insulation property state of the cooling device. be able to.

  In the present invention, an operation amount acquisition means, an operation amount average value calculation means, a temperature setting value acquisition means, an ideal operation amount output value calculation means, and a characteristic determination means are provided, and the number of integrations is equal to this number. By setting the accumulated time of the manipulated variable to be longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the heat retention characteristic of the cooling chamber of the cooling device, the gate opening of the heating device or the cooling device is set. Without using a new sensor for detecting the air purge level or the air purge level, only the operation amount and the temperature set value, which are the state quantities managed by the temperature control device, are used to maintain the heat retaining property of the heating device or the cooling property of the cooling device. The state can be evaluated.

  In the present invention, an operation amount acquisition means, an operation amount damping value calculation means, a temperature setting value acquisition means, an ideal operation amount output value calculation means, and a characteristic determination means are provided, and the damping time constant of the damping process is set. The gate opening or air purge level is detected by the heating device or the cooling device by setting the heating device to be longer than the time constant of the heat retention property of the heating chamber of the heating device or the time constant of the cooling property of the cooling chamber of the cooling device. It is possible to evaluate the heat insulation state of the heating device or the cold insulation state of the cooling device by using only the operation amount and the temperature set value which are the state amount managed by the temperature control device without newly adding a sensor or the like. it can.

  Further, in the present invention, by notifying the operator that the heat retaining property of the heating device or the cooling property of the cooling device is in an abnormal state, the operator fails to close the gate of the heating chamber or the cooling chamber or forgets to stop the air purge. It can be recognized that a heat insulation loss or a cold insulation loss occurs.

It is a figure explaining the time constant of the heat retention characteristic of a heating chamber. It is another figure explaining the time constant of the heat retention characteristic of a heating chamber. It is a block diagram which shows the structure of the state evaluation apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows one example of the heating apparatus to which the state evaluation apparatus which concerns on the 1st Embodiment of this invention is applied. It is a flowchart which shows operation | movement of the state evaluation apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the table set to the ideal operation amount output value calculation part in the state evaluation apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the state evaluation apparatus which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the state evaluation apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the table set to the ideal operation amount output value calculation part in the state evaluation apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the state evaluation apparatus which concerns on the 3rd Embodiment of this invention. It is a flowchart which shows operation | movement of the state evaluation apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the table set to the ideal operation amount output value calculation part in the state evaluation apparatus which concerns on the 3rd Embodiment of this invention.

[Principle of Invention 1]
The fact that the heat capacity of a device such as a heating device or a cooling device is so large that it cannot be ignored compared to the inside of the chamber is a factor affecting the heat insulation state and the cold insulation state. Furthermore, it has been noted that the temperature operation given to the chamber is often dominant as an element that accumulates heat in the case of heating or an element that releases heat in the case of cooling with respect to the heat capacity of the apparatus itself.
Then, by referring to the history of the operation amount MV output from the temperature control device (temperature controller) that performs the temperature operation, it has been conceived that heat accumulation or heat release with respect to the heat capacity of the device itself can be estimated.

  Specifically, the integrated value ΣMV of the manipulated variable MV in a specified time range is calculated, and the range of the manipulated variable MV output in the normal heat insulation state or the cold insulation state including the relationship with the set temperature SP is examined in advance. Remember that relationship. Then, the range of the normal operation amount MV is estimated based on the integrated value ΣMV of the operation amount MV and the set temperature SP during the operation of the apparatus, and using this range and the operation amount MV actually outputted, Assess the condition as appropriate. Further, when the operation amount MV actually output is out of the range of the estimated normal operation amount MV, the operator is notified as appropriate. As described above, the present invention is characterized in that heat accumulation or heat release is estimated in association with the integrated value ΣMV of the manipulated variable MV. At this time, the integration time or the number of integrations is determined based on the heat insulation characteristic or the cold insulation characteristic corresponding to the “heat capacity of the apparatus itself”.

[Principle of Invention 2]
When the integrated value ΣMV of the manipulated variable MV is adopted for the determination, the numerical value to be used as an index for determination must be changed greatly depending on the integration time or the number of integrations. Here, if the operation on the object to be heated by the heat treatment process is targeted, the accumulated value itself, that is, the accumulated value ΣMV of the manipulated variable MV is more important than the time factor of the accumulated time, so the accumulated value ΣMV is adopted. It is reasonable to do. However, in the case of the present invention, it can be said that it gives a judgment index to the heat capacity of the apparatus itself that is much larger than the heat capacity of the object to be heated, so it is necessary to take a long integration time or number of integrations in a substantially steady state. There is. In this case, in practice, the problem of scaling of numerical values is handled by calculating the average value (ΣMV) / N based on the number N of integrations rather than directly adopting the integrated value ΣMV of the manipulated variable MV as a conditional variable. It becomes easy.

[Principle 3 of the invention]
When the above principle 2 is realized by a small controller such as a temperature controller, it is difficult to secure a sufficient memory for accumulating the operation amount MV. Therefore, it is more practical to employ a numerical value obtained by damping the manipulated variable MV with a first-order lag filter than adopting the average value (ΣMV) / N of the manipulated variable MV. It is appropriate that the damping time constant at this time is longer than the time constant of the heat retention characteristic or the time constant of the cold insulation characteristic described later.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. This embodiment corresponds to Principle 1 of the invention described above. Here, a description will be given on the assumption of a heat treatment system in which an object to be heated in a heating chamber is heated by a heater. FIG. 1 is a diagram for explaining the time constant of the heat retention characteristic of the heating chamber. FIG. 1 shows changes in the temperature (control amount) PV of the object to be heated and the operation amount MV output from the temperature control device to the heater when the temperature setpoint SP is changed from 400 ° C. to 500 ° C. in 100 seconds. ing.

  In the example of FIG. 1, paying attention to the amount of decrease in the manipulated variable MV from when the temperature PV of the object to be heated reaches the temperature set value SP until the manipulated variable MV drops and converges due to the heat retention characteristics of the heating chamber, The time from when PV reaches the temperature setpoint SP until the manipulated variable MV drops by 63.2% of the drop width is defined as the time constant of the heat retention characteristics. The time constant of this heat retention characteristic is only a guide. As long as it is possible to measure the time required for the operation amount MV to sufficiently confirm the heat retention effect due to the influence of the heat capacity of the heating device itself, the method is not limited to the method for obtaining the time constant of the heat retention characteristics described in FIG.

  FIG. 2 is another diagram for explaining the time constant of the heat retention characteristic of the heating chamber. FIG. 2 shows changes in the temperature PV of the object to be heated and the temperature OT around the outer periphery of the heating chamber when the temperature set value SP is changed from 400 ° C. to 500 ° C. in 100 seconds. In the example of FIG. 2, attention is paid to the increase range of the temperature OT from when the temperature PV of the object to be heated reaches the temperature set value SP until the temperature OT on the outer periphery of the heating chamber rises due to the heat retention characteristics of the heating chamber. The time from when the temperature PV reaches the temperature set value SP to when the temperature OT increases by 63.2% of the above-described increase width is defined as the time constant of the heat retention characteristics. The time constant of this heat retention characteristic is also a guide only. As long as it is possible to measure the time sufficient for the heat insulation effect to be firmly confirmed in the apparatus temperature due to the influence of the heat capacity of the heating apparatus itself, the method is not limited to the method for obtaining the time constant of the heat insulation characteristics described in FIG.

  In addition, when measuring the temperature of the outer periphery of the heating chamber, a temperature sensor for measuring the temperature of the outer periphery of the heating chamber is required in addition to the temperature sensor originally provided in the heating device. This is not necessary when evaluating the heat insulation state while the apparatus is operating.

  1 and FIG. 2, as a result, the time constant of the heat retention characteristic is obtained as a different value. The difference in the time constant is a difference caused by the selection of the temperature measurement point on the outer periphery of the heating chamber. The method for obtaining the time constant of the heat retention characteristics described with reference to FIGS. 1 and 2 is a method for obtaining a reference time in advance, and essentially no strictness is required. As the temperature OT of the outer periphery of the heating chamber, it is preferable to measure the temperature at a location linked to the heat retention characteristics of the heating chamber as much as possible.

  FIG. 3 is a block diagram showing the configuration of the state evaluation apparatus according to the present embodiment. The state evaluation device includes an operation amount MV acquisition unit 1 that acquires an operation amount MV from a temperature control device such as a temperature controller, and an operation amount integrated value calculation that calculates an integrated value MV_S of a predetermined time range of the operation amount MV. Unit 2, a temperature setting value SP acquisition unit 3 for acquiring a temperature setting value SP, and an ideal operation amount output value calculation unit for obtaining an ideal operation amount output value MV_R using the operation amount integrated value MV_S and the temperature setting value SP as input values 4, a heat retention characteristic determination unit 5 that determines the heat retention state of the heating device, and a determination result output unit 6 that notifies the operator that the heat retention property of the heating device is in an abnormal state.

  FIG. 4 is a diagram illustrating an example of a heating apparatus to which the state evaluation apparatus of the present embodiment is applied. In the example of FIG. 4, a heater 112 and a temperature sensor 113 are installed inside an air circulation type heating chamber 111. The temperature sensor 113 measures the temperature PV of the air heated by the heater 112. The temperature controller 100 calculates the manipulated variable MV so that the temperature measurement value PV matches the temperature setting value SP. The power adjuster 114 determines power according to the operation amount MV, and supplies the determined power to the heater 112 through the power supply circuit 115. Thus, the temperature controller 100 controls the temperature in the heating chamber 111. The state evaluation apparatus of the present embodiment is provided inside the temperature controller 100.

Hereinafter, the operation of the state evaluation apparatus according to the present embodiment will be described. FIG. 5 is a flowchart showing the operation of the state evaluation apparatus.
The operation amount MV acquisition unit 1 acquires the operation amount MV output from the temperature controller 100 (step S100 in FIG. 5). Since the operation amount MV is output from the temperature controller 100 for each control cycle, the operation amount MV acquisition unit 1 acquires the operation amount MV for each control cycle, for example.

The operation amount integrated value calculation unit 2 calculates an integrated value MV_S = ΣMV in a predetermined time range of the operation amount MV from the operation amount MV acquired by the operation amount MV acquisition unit 1 (step S101). At this time, the predetermined integration time is set to be longer than the time constant of the heat retention characteristic of the heating chamber 111.
Subsequently, the temperature set value SP acquisition unit 3 acquires the temperature set value SP set by the operator of the heating device from the temperature controller 100 (step S102).

  The ideal manipulated variable output value calculation unit 4 obtains an ideal manipulated variable output value MV_R that is the manipulated variable MV that is output in the normal warming state of the heating device from the temperature setting value SP and the manipulated variable integrated value MV_S (step S103). ). As a method for obtaining the ideal manipulated variable output value MV_R, the relationship between the range of the manipulated variable MV that is output in the normal warming state of the heating device and the temperature set value SP and the manipulated variable integrated value MV_S is measured in advance. Based on this relationship, a table for storing the temperature set value SP, the operation amount integrated value MV_S, and the ideal operation amount output value MV_R in association with each other is created, or the ideal operation is performed from the temperature set value SP and the operation amount integrated value MV_S. A mathematical formula for calculating the quantity output value MV_R may be created, and this table or mathematical formula may be registered in the ideal manipulated variable output value calculation unit 4 in advance. An example of the table is shown in FIG. When using mathematical expressions, the mathematical expressions may be created by performing multivariate analysis such as multiple regression analysis or SVR (Support Vector Regression) on the measured data.

  Next, the heat retention characteristic determination unit 5 compares the operation amount MV acquired by the operation amount MV acquisition unit 1 with the ideal operation amount output value MV_R obtained by the ideal operation amount output value calculation unit 4 (step S104). When the amount MV deviates from the ideal manipulated variable output value MV_R by more than a specified width, it is determined that the heat retaining property of the heating device is in an abnormal state. The heat retention characteristic determination unit 5 performs such determination for each control cycle of the temperature controller 100, for example.

  The determination result output unit 6 receives the determination result of the heat retention characteristic determination unit 5 and notifies the operator that the heat retaining property of the heating device is in an abnormal state (steps S105 and S106). For this notification, for example, an LED or the like may be turned on, or a message may be displayed on the screen. Further, the operator may be notified of a deviation amount of the operation amount MV from the ideal operation amount output value MV_R.

  As described above, in this embodiment, the operation amount MV and the temperature set value, which are state quantities managed by the temperature controller, are not added to the heating device without newly adding a sensor or the like for detecting the gate opening degree or the air purge level. By using only SP, the heat retention state of the heating device can be evaluated. Moreover, in this Embodiment, when the heat retention state of a heating apparatus remove | deviates from the state assumed previously, an operator can be notified. By this notification, the operator can determine that a heat retention loss such as failure to close the gate of the heating chamber or forgetting to stop the air purge has occurred.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. FIG. 7 is a block diagram showing the configuration of the state evaluation apparatus according to the second embodiment of the present invention. The same components as those in FIG. 3 are denoted by the same reference numerals. This embodiment corresponds to Principle 2 of the invention described above. The state evaluation apparatus according to the present embodiment includes an operation amount MV acquisition unit 1, a temperature setting value SP acquisition unit 3, an average value MV_A of the operation amount MV and the temperature setting value SP as input values, and an ideal operation amount output value MV_R. Is provided with an ideal operation amount output value calculation unit 4a, a heat retention characteristic determination unit 5, a determination result output unit 6, and an operation amount average value calculation unit 7 that calculates an operation amount average value MV_A.

Hereinafter, the operation of the state evaluation apparatus according to the present embodiment will be described. FIG. 8 is a flowchart showing the operation of the state evaluation apparatus. The operation of the manipulated variable MV acquisition unit 1 is the same as that in the first embodiment (step S100 in FIG. 8).
The operation amount average value calculation unit 7 calculates an average value MV_A = (ΣMV) / N of a predetermined number of operation amounts MV from the operation amount MV acquired by the operation amount MV acquisition unit 1 (step S107). At this time, the predetermined number of integrations N is set so that the integration time required for integration of the N manipulated variables MV is longer than the time constant of the heat retention characteristic of the heating chamber 111.

The operation of the temperature set value SP acquisition unit 3 is the same as that of the first embodiment (step S102).
The ideal manipulated variable output value calculation unit 4a obtains an ideal manipulated variable output value MV_R from the temperature set value SP and the manipulated variable average value MV_A (step S108). As a method for obtaining the ideal manipulated variable output value MV_R, the relationship between the range of the manipulated variable MV that is output in the normal warming state of the heating device and the temperature set value SP and the manipulated variable average value MV_A is measured in advance. Based on this relationship, a table that stores the temperature set value SP, the manipulated variable average value MV_A, and the ideal manipulated variable output value MV_R in association with each other is created, or an ideal operation is obtained from the temperature set value SP and the manipulated variable average value MV_A. A mathematical formula for calculating the quantity output value MV_R may be created, and this table or mathematical formula may be registered in advance in the ideal manipulated variable output value calculation unit 4a. An example of the table is shown in FIG. Similar to the first embodiment, when using mathematical formulas, a mathematical formula may be created by performing multivariate analysis on the measured data.

The operations of the heat retention characteristic determination unit 5 and the determination result output unit 6 are the same as those in the first embodiment (steps S104 to S106).
Thus, in this embodiment, the same effect as that of the first embodiment can be obtained.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. FIG. 10 is a block diagram showing the configuration of the state evaluation apparatus according to the third embodiment of the present invention. The same components as those in FIG. 3 are denoted by the same reference numerals. This embodiment corresponds to Principle 3 of the invention described above. The state evaluation apparatus according to the present embodiment uses the manipulated variable MV acquisition unit 1, the temperature set value SP acquisition unit 3, and the manipulated variable damping value and the temperature set value SP, which will be described later, as input values to obtain the ideal manipulated variable output value MV_R. An ideal manipulated variable output value calculation unit 4b to be obtained, a heat retention characteristic determination unit 5, a determination result output unit 6, and an operation amount damping value calculation unit 8 that calculates an operation amount damping value MV_D obtained by damping the operation amount MV. ing.

Hereinafter, the operation of the state evaluation apparatus according to the present embodiment will be described. FIG. 11 is a flowchart showing the operation of the state evaluation apparatus. The operation of the manipulated variable MV acquisition unit 1 is the same as that in the first embodiment (step S100 in FIG. 11).
The operation amount damping value calculation unit 8 calculates the operation amount damping value MV_D = MV / (1 + Ts) from the operation amount MV acquired by the operation amount MV acquisition unit 1 (step S109). Here, T is a damping time constant, and s is a Laplace operator. The damping time constant T is set to be longer than the time constant of the heat retention characteristic of the heating chamber 111.

The operation of the temperature set value SP acquisition unit 3 is the same as that of the first embodiment (step S102).
The ideal manipulated variable output value calculation unit 4b obtains an ideal manipulated variable output value MV_R from the temperature set value SP and the manipulated variable damping value MV_D (step S110). As a method for obtaining the ideal manipulated variable output value MV_R, a relationship between the range of the manipulated variable MV output in the normal warming state of the heating device and the temperature set value SP and the manipulated variable damping value MV_D is measured in advance. Based on this relationship, a table for storing the temperature set value SP, the manipulated variable damping value MV_D, and the ideal manipulated variable output value MV_R in association with each other is created, or an ideal operation is obtained from the temperature set value SP and the manipulated variable damping value MV_D. A formula for calculating the quantity output value MV_R may be created, and this table or formula may be registered in advance in the ideal manipulated variable output value calculation unit 4b. An example of the table is shown in FIG. Similar to the first embodiment, when using mathematical formulas, a mathematical formula may be created by performing multivariate analysis on the measured data.

The operations of the heat retention characteristic determination unit 5 and the determination result output unit 6 are the same as those in the first embodiment (steps S104 to S106).
Thus, in this embodiment, the same effect as that of the first embodiment can be obtained.

  In the first to third embodiments, the state evaluation device is applied to the heating device, but it can also be applied to a cooling device. When applied to a cooling device, the time constant of the cooling characteristics of the cooling chamber is used instead of the time constant of the temperature characteristics of the heating chamber. The time constant of the cold insulation characteristic can be obtained by the same method as in FIG. In addition, in order to obtain the time constant of the cooling characteristics from the temperature OT around the cooling chamber, the temperature OT around the cooling chamber decreases due to the cooling characteristics of the cooling chamber after the temperature PV of the object to be cooled reaches the temperature setting value SP. Paying attention to the decreasing range of the temperature OT until it converges, the time from when the temperature PV reaches the temperature setting value SP until the temperature OT decreases by 63.2% of the above-mentioned decreasing range, A time constant may be used. As the temperature OT of the outer periphery of the cooling chamber, it is preferable to measure the temperature of a location that is linked to the cooling characteristics of the cooling chamber as much as possible.

  Further, in the first to third embodiments, the temperature set value SP is used because it is targeted for temperature rise or temperature drop. However, if the steady state of temperature control is intended, the temperature set value is used. It is also possible to use a temperature measurement value PV instead of SP. When using the temperature measurement value PV, a temperature measurement value PV acquisition unit may be provided instead of the temperature set value SP acquisition unit 3.

  The state evaluation apparatus in the first to third embodiments can be realized by, for example, a computer including a CPU, a memory, and an interface, and a program that controls these hardware resources. The CPU executes the processes described in the first to third embodiments according to the program stored in the memory.

  The present invention can be applied to a technique for evaluating the heat retaining property of a heating device or the state of cold retaining property of a cooling device.

  DESCRIPTION OF SYMBOLS 1 ... Operation amount MV acquisition part, 2 ... Operation amount integrated value calculation part, 3 ... Temperature setting value SP acquisition part, 4, 4a, 4b ... Ideal operation amount output value calculation part, 5 ... Thermal insulation characteristic determination part, 6 ... Determination Result output unit, 7 ... operation amount average value calculation unit, 8 ... operation amount damping value calculation unit.

Claims (12)

An operation amount acquisition means for acquiring an operation amount from a temperature control device that controls the temperature of the heating device or the cooling device;
An operation amount integrated value calculating means for calculating an integrated value of a predetermined time range of the operation amount;
Temperature setting value acquisition means for acquiring a temperature setting value from the temperature control device;
An ideal operation which is an operation amount output in a normal heat insulation state of the heating device or an operation amount output in a normal cold insulation state of the cooling device with the integrated value of the operation amount and the temperature set value as input values An ideal manipulated variable output value calculating means for obtaining a quantity output value;
A characteristic for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the operation amount acquired by the operation amount acquiring means is out of a specified width or more from the ideal operation amount output value. Determination means,
The integrated time of the integrated value of the manipulated variable is set to be longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the cold insulation characteristic of the cooling chamber of the cooling device. Condition evaluation device. An operation amount acquisition means for acquiring an operation amount from a temperature control device that controls the temperature of the heating device or the cooling device;
An operation amount average value calculating means for calculating an average value of the operation amounts for a predetermined number of integrations;
Temperature setting value acquisition means for acquiring a temperature setting value from the temperature control device;
An ideal operation that is an operation amount that is output in a normal heat insulation state of the heating device or an operation amount that is output in a normal cold insulation state of the cooling device, using the average value of the operation amount and the temperature setting value as input values An ideal manipulated variable output value calculating means for obtaining a quantity output value;
A characteristic for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the operation amount acquired by the operation amount acquiring means is out of a specified width or more from the ideal operation amount output value. Determination means,
The cumulative number is set such that the cumulative time of the manipulated variable for this number of times is longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the cold retention characteristic of the cooling chamber of the cooling device. The state evaluation apparatus characterized by this. An operation amount acquisition means for acquiring an operation amount from a temperature control device that controls the temperature of the heating device or the cooling device;
An operation amount damping value calculating means for calculating an operation amount damping value obtained by damping the operation amount;
Temperature setting value acquisition means for acquiring a temperature setting value from the temperature control device;
Using the operation amount damping value and the temperature set value as input values, an ideal operation amount that is an operation amount that is output in a normal heat insulation state of the heating device or an operation amount that is output in a normal cold insulation state of the cooling device An ideal manipulated variable output value calculating means for obtaining an output value;
A characteristic for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the operation amount acquired by the operation amount acquiring means is out of a specified width or more from the ideal operation amount output value. Determination means,
The state evaluation is characterized in that the damping time constant of the damping process is set to be longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the cold insulation characteristic of the cooling chamber of the cooling device. apparatus. In the state evaluation apparatus according to any one of claims 1 to 3,
The state evaluation apparatus further comprises a determination result output means for notifying an operator that the heat retaining property of the heating device or the cooling property of the cooling device is in an abnormal state. In the state evaluation apparatus according to any one of claims 1 to 4,
The ideal manipulated variable output value calculating means includes the table that stores the input value and the ideal manipulated variable output value in association with each other, or the mathematical formula that calculates the ideal manipulated variable output value from the input value. A state evaluation apparatus characterized by obtaining an output value. In the state evaluation apparatus according to any one of claims 1 to 5,
Instead of the temperature set value acquisition means, comprising a temperature measurement value acquisition means for acquiring a temperature measurement value from the temperature control device,
The ideal operation amount output value calculation means obtains the ideal operation amount output value using the temperature measurement value instead of the temperature set value. An operation amount acquisition step of acquiring an operation amount from a temperature control device that performs temperature control of the heating device or the cooling device;
An operation amount integrated value calculating step of calculating an integrated value of a predetermined time range of the operation amount;
A temperature setting value acquisition step of acquiring a temperature setting value from the temperature control device;
An ideal operation which is an operation amount output in a normal heat insulation state of the heating device or an operation amount output in a normal cold insulation state of the cooling device with the integrated value of the operation amount and the temperature set value as input values An ideal manipulated variable output value calculation step for obtaining a quantity output value;
A characteristic determining step for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the operation amount deviates from the ideal operation amount output value by a specified width or more;
The integrated time of the integrated value of the manipulated variable is set to be longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the cold insulation characteristic of the cooling chamber of the cooling device. State evaluation method. An operation amount acquisition step of acquiring an operation amount from a temperature control device that performs temperature control of the heating device or the cooling device;
An operation amount average value calculating step for calculating an average value of the operation amounts for a predetermined number of integrations;
A temperature setting value acquisition step of acquiring a temperature setting value from the temperature control device;
An ideal operation that is an operation amount that is output in a normal heat insulation state of the heating device or an operation amount that is output in a normal cold insulation state of the cooling device, using the average value of the operation amount and the temperature setting value as input values An ideal manipulated variable output value calculation step for obtaining a quantity output value;
A characteristic determining step for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the operation amount deviates from the ideal operation amount output value by a specified width or more;
The cumulative number is set such that the cumulative time of the manipulated variable for this number of times is longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the cold retention characteristic of the cooling chamber of the cooling device. A state evaluation method characterized by An operation amount acquisition step of acquiring an operation amount from a temperature control device that performs temperature control of the heating device or the cooling device;
An operation amount damping value calculating step of calculating an operation amount damping value obtained by damping the operation amount;
A temperature setting value acquisition step of acquiring a temperature setting value from the temperature control device;
Using the operation amount damping value and the temperature set value as input values, an ideal operation amount that is an operation amount that is output in a normal heat insulation state of the heating device or an operation amount that is output in a normal cold insulation state of the cooling device An ideal manipulated variable output value calculating step for obtaining an output value;
A characteristic determining step for determining that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state when the operation amount deviates from the ideal operation amount output value by a specified width or more;
The state evaluation is characterized in that the damping time constant of the damping process is set to be longer than the time constant of the heat retention characteristic of the heating chamber of the heating device or the time constant of the cold insulation characteristic of the cooling chamber of the cooling device. Method. In the state evaluation method according to any one of claims 7 to 9,
The state evaluation method further comprises a determination result output step for notifying an operator that the heat retaining property of the heating device or the cold retaining property of the cooling device is in an abnormal state. In the state evaluation method according to any one of claims 7 to 10,
In the ideal manipulated variable output value calculating step, the ideal manipulated variable output value is calculated using a table that stores the input value and the ideal manipulated variable output value in association with each other, or a mathematical expression that calculates the ideal manipulated variable output value from the input value. A state evaluation method characterized by obtaining an output value. The state evaluation method according to any one of claims 7 to 11,
Instead of the temperature set value acquisition step, a temperature measurement value acquisition step of acquiring a temperature measurement value from the temperature control device,
The ideal operation amount output value calculating step obtains the ideal operation amount output value by using the temperature measurement value instead of the temperature set value.

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