KR102410188B1 - Temperature controller and abnormality determination method - Google Patents

Abstract

An object of the present invention is to ensure that the ability of the heater can be sufficiently utilized in a range that does not cause damage to the heater.
The calculation unit 103 calculates the change in temperature increase per unit time of the heater 101 measured by the measurement unit 102 as a temperature increase rate. The first detection unit 104 detects that the measurement temperature measured by the measurement unit 102 exceeds a preset first value. The 2nd detection part 105 detects that the temperature increase rate calculated|required by the calculation part 103 exceeds a preset 2nd value. In the first measurement unit 106, the first detection unit 104 detects that the measurement temperature exceeds the first value, and the second detection unit 105 detects that the temperature increase rate exceeds the second value, Measure the duration of the state of being. The determination unit 107 determines that it is abnormal when the time measured by the first measurement unit 106 exceeds the preset first time.

Description

TEMPERATURE CONTROLLER AND ABNORMALITY DETERMINATION METHOD

The present invention relates to a temperature controller for controlling the temperature of a control target and an abnormality determination method.

A temperature controller for controlling the temperature of various temperature environments, etc., numerically displays the temperature of a monitoring target detected using a temperature sensor such as a thermocouple or a resistance thermometer, and also controls output to the heater according to the detected temperature and set temperature to control the temperature of the monitoring target.

However, since a heater is damaged if handled incorrectly, the following alarm setting and setting of a control output are generally possible in the apparatus which controls heaters, such as a thermostat (refer patent document 1, patent document 2). The user of the heater uses such a function to output an alarm and to limit the current flowing through the heater.

ㆍTemperature monitoring (upper temperature limit alarm) to prevent heating beyond the temperature specified by the manufacturer of the heater.

ㆍMonitoring the rate of temperature change (temperature change rate alarm) to ensure that the temperature increase rate does not exceed the temperature increase rate specified by the manufacturer of the heater.

ㆍMonitors the upper limit of the temperature controller's control value (MV value), and if it exceeds the upper limit of the alarm, an alarm is issued (MV value upper limit alarm).

ㆍSet the upper limit (control value upper limit) of the control value (MV value) so that the temperature controller does not output more than necessary (set the upper limit of the control value).

ㆍMeasures the current flowing through the heater, and an alarm is issued when a current exceeding the set value flows (overcurrent alarm).

Patent Document 1: Japanese Patent Application Laid-Open No. Hei 09-243098 Patent Document 2: Japanese Patent Laid-Open No. Hei 01-298385

As described above, the heater is damaged by mishandling. For example, if the temperature is raised at a temperature change rate (eg 100°C/s) higher than the rated value, the heater is damaged. The temperature change rate has different characteristics for each type of heater, and specifications regarding the temperature change rate are suggested by the manufacturer of the heater. Although heater characteristics change with temperature, and the rate of temperature change may differ depending on the temperature range, the specification regarding the rate of temperature change suggested by the manufacturer of the heater is often a representative value that can be safely used in the entire temperature range. For this reason, for example, even if the specification regarding the rate of temperature change suggested by the manufacturer of the heater is 50°C/s, practically, if it is 200°C or less, the heater is not damaged even at 80°C/s.

In addition, as a characteristic of the heater, even if the temperature is changed at a rate greater than or equal to a prescribed temperature change rate, deterioration may not occur if the change time is short. For example, even if the specification regarding the rate of change of temperature suggested by the manufacturer of the heater is 50° C./s, the heater is not damaged if the time set to 80° C./s is 10 s or less.

The general temperature change rate alarm is set based on the temperature change rate suggested by the manufacturer of the heater. When this set value is exceeded, while outputting an alarm, a thermostat makes the output MV value small (for example, to 0%). However, since the limit of this control is set based on the rate of change of temperature suggested by the manufacturer of the heater, depending on the temperature of the heater or the time when the rate of change of temperature exceeds the upper limit, even if the limit is exceeded, damage to the heater does not occur. there are cases where it doesn't. As described above, when a heater that does not cause damage even if the limit is exceeded can be used, there is a possibility that the temperature controllability can be improved by using the heater within this range.

As described above, conventionally, although damage to the heater can be prevented, there has been a problem that the ability of the heater cannot be sufficiently utilized.

The present invention has been made in order to solve the above problems, and an object of the present invention is to make full use of the ability of the heater in a range that does not cause damage to the heater.

The temperature controller according to the present invention is a temperature controller for controlling the heating ability of a heater to control the temperature of a control object to a preset temperature, and includes a measuring unit configured to measure the temperature of the heater, and a unit of the heater measured by the measuring unit A calculation unit configured to obtain the change in temperature per hour as a temperature increase rate, a first detection unit configured to detect that the measured temperature measured by the measurement unit exceeds a preset first value, and the temperature increase rate calculated by the calculation unit is preset A second detection unit configured to detect exceeding the set second value, the first detection unit detects that the measured temperature exceeds the first value, and the second detection unit determines that the temperature increase rate exceeds the second value. A first measurement unit configured to measure the time for which the state in which the state has been detected continues, and a determination unit configured to determine that the time measured by the first measurement unit is abnormal when the time measured by the first measurement unit exceeds a first preset time; An output unit for outputting an alarm is provided.

In one configuration example of the temperature controller, a third detection unit configured to detect that the measured temperature measured by the measurement unit exceeds a preset third value higher than the first value, and the third detection unit includes: A second measurement unit configured to detect that the third value has been exceeded, and the second detection unit detects that the temperature increase rate has exceeded the second value, continues for a period of time that continues; If the time measured by the measuring unit exceeds the first time or the time measured by the second measuring unit exceeds the preset second time, it is determined as abnormal.

In one configuration example of the temperature controller, a third detection unit configured to detect that the measured temperature measured by the measurement unit exceeds a preset third value higher than the first value; A fourth detection unit configured to detect that a preset fourth value different from two values has been exceeded, and the third detection unit detects that the measured temperature has exceeded the third value, and the fourth detection unit includes a temperature increase rate A second measurement unit further comprising a second measurement unit configured to measure the duration of the state in which it is detected that has exceeded the fourth value, wherein the determination unit is configured such that the time measured by the first measurement unit exceeds the first time, or the second measurement unit If the measurement time exceeds the preset second time, it is judged as abnormal.

In one configuration example of the temperature controller, the first time and the second time are the same.

The abnormality determination method according to the present invention comprises a first step of obtaining a temperature increase rate of a measured temperature increase change per unit time of a heater, and a first step of detecting that the measured temperature measurement temperature of the heater exceeds a preset first value. In the second step, a third step of detecting that the temperature increase rate obtained in the first step exceeds a preset second value, and in the second step, it is detected that the measured temperature exceeds the first value, and further In the third step, the fourth step of measuring the duration of the state in which it is detected that the temperature increase rate exceeds the second value, and when the time measured in the fourth step exceeds the first preset time, it is called abnormal A fifth step of determining is provided.

In one configuration example of the abnormality determination method, a sixth step of detecting that the measured temperature exceeds a preset third value higher than the first value, and in the sixth step, the measured temperature is the third value Excess is detected, and in the third step, the seventh step of measuring the time for which the state in which the temperature increase rate exceeds the second value is detected, and the time measured in the seventh step are preset If the second time period is exceeded, an eighth step of determining that it is abnormal is further provided.

In one configuration example of the abnormality determination method, the sixth step of detecting that the measured temperature measured by the measuring unit exceeds a preset third value higher than the first value, and the temperature increase rate obtained in the first step is , A seventh step of detecting that a preset fourth value higher than the second value is exceeded, a sixth step is detecting that the measured temperature exceeds a third value, and a seventh step is a temperature increase rate an eighth step of measuring the duration of the state in which it is detected that has exceeded the fourth value, and a ninth step of judging an abnormality when the time measured in the eighth step exceeds a preset second time have more

In one configuration example of the abnormality determination method, the first time period and the second time period are the same.

As described above, according to the present invention, the state in which the first detection unit detects that the measured temperature exceeds the first value, and the second detection unit detects that the temperature increase rate exceeds the second value, continues Since it is judged as abnormal when time is measured and the time to measure exceeds the 1st time preset in advance, the capability of a heater can fully be utilized in the range which does not cause heater damage.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the structure of the temperature control system which concerns on Embodiment 1 of this invention.
2 is a flowchart for explaining the abnormality determination method according to the first embodiment of the present invention.
Fig. 3 is a configuration diagram showing the configuration of a temperature controller according to a second embodiment of the present invention.
4 is a flowchart for explaining the abnormality determination method according to the second embodiment of the present invention.
5 is a configuration diagram showing the configuration of a temperature controller according to Embodiment 3 of the present invention.
6 is a flowchart for explaining the abnormality determination method according to the third embodiment of the present invention.
7 : is a block diagram which shows the hardware structure of the calculation part, 1st detection part, 2nd detection part, 3rd detection part, 1st measurement part, 2nd measurement part, and judgment part of the thermostat which concerns on embodiment of this invention.

EMBODIMENT OF THE INVENTION Hereinafter, the temperature control system which concerns on embodiment of this invention is demonstrated.

[Embodiment 1]

First, a temperature controller according to Embodiment 1 of the present invention will be described with reference to FIG. 1 . This temperature controller controls the heating ability of the heater 101 to control the temperature of the control object to a preset temperature. The temperature controller includes a measurement unit 102 , a calculation unit 103 , a first detection unit 104 , a second detection unit 105 , a first measurement unit 106 , a determination unit 107 , an output unit 108 , A determination value storage unit 120 and a control unit 121 are provided.

The measuring unit 102 measures the temperature of the heater 101 . The control unit 121 generates and outputs a control value for controlling the operation of the heater 101 heating the control target according to the relationship between the measured temperature measured by the measuring unit 102 and the set set temperature.

The calculation unit 103 calculates the change in temperature increase per unit time of the heater 101 measured by the measurement unit 102 as a temperature increase rate. The first detection unit 104 detects that the measurement temperature measured by the measurement unit 102 exceeds a preset first value stored in the determination value storage unit 120 . For example, 250°C can be set as the first value. The 2nd detection part 105 detects that the temperature increase rate calculated|required by the calculation part 103 exceeds a preset 2nd value. For example, 50°C/sec can be set as the second value.

In the first measurement unit 106, the first detection unit 104 detects that the measured temperature exceeds the first value, and the second detection unit 105 detects that the temperature increase rate exceeds the second value, Measure the duration of the state of being. The determination unit 107 determines that it is abnormal when the time measured by the first measurement unit 106 exceeds the preset first timer set value (first time) stored in the determination value storage unit 120 . . The first timer setting value may be, for example, 2 seconds. The output unit 108 outputs an alarm when the determination unit 107 determines that it is abnormal. For example, an indication that an abnormality has occurred is displayed on a display unit (not shown). In addition, by using a horn, a speaker, etc., it is notified as an alarm by voice or the like.

For example, conventionally, when the specification regarding the rate of change of temperature suggested by the manufacturer of the heater is 50° C./s, 50° C./s is set as the determination value of the temperature increase rate obtained from the measured temperature. Accordingly, when the temperature increase rate obtained from the measured temperature becomes 50° C./s or more, an alarm is issued, and the control value output to the heater 101 is limited, such as being zero.

In such abnormal avoidance control, for example, if the heater 101 is 200° C. or less practically, the heater does not break even at 80° C./s, and the temperature increase rate is increased to 50° C. even when used in a low-temperature region where the heating temperature is less than 200° C. You can't do more than /s. On the other hand, in this type of heat treatment, for example, it is possible to shorten the treatment time by increasing the temperature increase rate.

On the other hand, according to Embodiment 1, if a heating temperature is less than 250 degreeC, for example, even if the temperature increase rate becomes 50 degreeC/s or more, it is not judged as abnormal. In addition, even if the heating temperature is 250°C or higher, it is not judged as abnormal if the time for which the temperature increase rate is 50°C/s or higher is 9 seconds or less. For this reason, according to Embodiment 1, it becomes possible to make the temperature increase rate faster, and it becomes possible to aim at shortening of processing time. For example, by using a heater that can be used at a higher temperature increase rate, even in the conventional control using the rated value, the temperature increase rate can be made faster, and the processing time can be shortened. However, such a high-speed heating heater is expensive and causes an increase in cost. On the other hand, according to Embodiment 1, it is not necessary to use the heater of a solid liquid. Thus, according to Embodiment 1, it becomes possible to fully utilize the ability of the heater 101 in the range which does not cause heater damage.

Next, the operation example (abnormality determination method) of the temperature controller which concerns on Embodiment 1 is demonstrated using the flowchart of FIG.

First, in step S101, the calculation unit 103 obtains the measured change in temperature increase per unit time of the heater 101 as the temperature increase rate (first step). Next, in step S102 , the first detection unit 104 detects that the measured temperature of the heater 101 exceeds a preset first value stored in the determination value storage unit 120 . (2nd step). When it is detected by the 1st detection part 104 that the measured temperature exceeds the 1st value (yes in step S102), in step S103, the temperature increase rate calculated|required by the 2nd detection part 105 is the determination value memory|storage part 120 ) that exceeds a preset second value stored in ) is detected (third step).

When it is detected by the 2nd detection part 105 that the temperature increase rate exceeded the 2nd value (yes in step S103), in step S104, the 1st measurement part 106 detects that the temperature increase rate exceeded the 2nd value. It is judged whether or not the measurement of the duration of the current state has started. When the measurement of time has not started (no in step S104), in step S105, the first measurement unit 106 detects that the measured temperature exceeds the first value and that the temperature increase rate exceeds the second value, The measurement of the time for which the existing state continues (step 4) is started, and the flow proceeds to step S106. Further, when the measurement of time has started (yes in step S104), the flow advances to step S106.

Next, in step S106 , the determination unit 107 determines whether or not the measured time exceeds a preset first timer set value (first time) stored in the determination value storage unit 120 . (Step 5). If the measured time exceeds the first timer set value (yes in step S106), in step S107, the first measurement unit 106 stops (ends) the measurement of time, and in step S108, the determination unit 107 It is judged to be abnormal (step 5). In addition, the measurement of time continues while it is detected that the measurement temperature exceeded a 1st value, and that it was detected that the temperature increase rate exceeded a 2nd value (step S101 - step S106). If the determination unit 107 determines that there is an abnormality, in step S109, abnormal processing (transition to the operation amount at the time of abnormality, issuing an alarm, etc.) is performed. After the abnormal processing, the state is maintained until a cancel operation is performed in step S131.

[Embodiment 2]

Next, a temperature controller according to a second embodiment of the present invention will be described with reference to FIG. 3 . This temperature controller controls the heating ability of the heater 101 to control the temperature of the control object to a preset temperature. The temperature controller includes a measurement unit 102 , a calculation unit 103 , a first detection unit 104 , a second detection unit 105 , a first measurement unit 106 , an output unit 108 , and a judgment value storage unit 120 . ) and a control unit 121 . These are the same as those of Embodiment 1 described above.

In Embodiment 2, further, a third preset value higher than the first value as a threshold value of the measured temperature, and a first time applied as a first timer set value when the measured temperature is greater than or equal to the first value and less than the third value; , a second time applied as a second timer set value when the measured temperature is equal to or greater than the third value. Moreover, these 3rd value and 2nd timer set value (2nd time) are also stored in the determination value memory|storage part 120 similarly to 1st value, 2nd value, and 1st timer set value (1st time). In Embodiment 2, for example, 100°C can be set as the first value, 50°C/sec can be set as the second value (temperature increase rate threshold), and 250°C can be set as the third value.

Further, in the second embodiment, the determination unit 107a determines whether the time measured by the first measurement unit 106 exceeds the first timer set value, or the time measured by the second measurement unit 110 is set in advance. 2 If the timer set value is exceeded, it is judged as abnormal. In Embodiment 2, the first timer setting value may be, for example, 3 seconds, and the second timer setting value may be 2 seconds. In addition, the first timer set value and the second time may be set to the same value.

Also in Embodiment 2, similarly to Embodiment 1 mentioned above, it becomes possible to fully utilize the ability of the heater 101 in the range which does not cause heater damage. Moreover, in Embodiment 2, the time reference|standard of the judgment made above can be set respectively in two temperature ranges. For this reason, for example, in a lower temperature range, the reference|standard of the judgment time used as an abnormality can be made longer, for example, and a faster temperature rise is enabled. In addition, in the above-mentioned thing, although the judgment standard of a measurement temperature was made into two of a 1st value and a 3rd value, it is not limited to this, It is also possible to make three or more judgment criteria of a measurement temperature.

Next, the operation example (abnormality determination method) of the temperature controller which concerns on Embodiment 2 is demonstrated using the flowchart of FIG. In addition, abnormality determination by the 1st timer set value using the 1st value and 2nd value is the same as that of Embodiment 1 mentioned above, and a description is abbreviate|omitted below.

First, in step S101, the calculation unit 103 obtains the measured change in temperature increase per unit time of the heater 101 as the temperature increase rate (first step). Next, in step S112, if the first detection unit 104 detects that the measured temperature of the heater 101 is greater than or equal to the preset first value and less than the third value (yes in step S112), the timer A first timer set value (first time) is selected from the judgment value storage unit 120 and set as the set value (step S113). Thereafter, the flow advances to step S103.

On the other hand, when the first detection unit 104 detects that the measured temperature is equal to or greater than the third value (yes in step S114), the second timer setting value (second time) is selected from the determination value storage unit 120 as the timer setting value, set (step S115). Then, in step S103, the 2nd detection part 105 detects that the temperature increase rate exceeds the preset 2nd value.

When it is detected by the 2nd detection part 105 that the temperature increase rate exceeded the 2nd value (yes in step S103), in step S104, the 1st measurement part 106 detects that the temperature increase rate exceeded the 2nd value. It is judged whether or not the measurement of the duration of the current state has started. When the measurement of time has not started (no in step S104), in step S115, the second measurement unit 110 detects that the measured temperature exceeds the third value and that the temperature increase rate exceeds the second value, The measurement of the time for which the existing state continues (step 7) is started, and the flow proceeds to step S116. Further, when the measurement of time is started (yes in step S104), the flow advances to step S116.

Next, in step S116, the determination part 107a determines whether the measured time exceeds the 2nd timer setting value (2nd time) preset with a timer. If the measured time exceeds the second timer set value (yes in step S116), in step S117, the second measurement unit 110 stops (finishes) the time measurement, and in step S118, the determination unit 107a It is judged to be abnormal (step 8). In addition, the measurement of time is continued while it is detected that the measured temperature exceeded the 3rd value, and that the temperature increase rate exceeded the 2nd value is detected (step S101 - step S116). If the determination unit 107a determines that there is an abnormality, in step S119, abnormal processing (transition to the operation amount at the time of abnormality, an alarm is issued by the output unit 108, etc.) is performed. After the abnormal processing, the state is maintained until a cancel operation is performed in step S131.

[Embodiment 3]

Next, a temperature controller according to a third embodiment of the present invention will be described with reference to FIG. 5 . This temperature controller controls the heating ability of the heater 101 to control the temperature of the control object to a preset temperature. The temperature controller includes a measurement unit 102 , a calculation unit 103 , a first detection unit 104 , a second detection unit 105 , a first measurement unit 106 , an output unit 108 , and a judgment value storage unit 120 . ) and a control unit 121 . These are the same as those of Embodiment 1 described above.

In Embodiment 3, further, a third preset value higher than the first value as the threshold value of the measurement temperature, and a second value applied as a temperature increase rate threshold when the measurement temperature is equal to or greater than the first value and less than the third value; A fourth value applied as a temperature increase rate threshold when the measured temperature is equal to or greater than the third value is provided. In Embodiment 3, for example, 100° C. may be set as the second value, and 250° C. may be set as the third value.

Moreover, in Embodiment 3, the 3rd detection part 109 detects that the measured temperature exceeds a 3rd value, and the 4th detection part 111 detects that the temperature increase rate exceeds a 4th value. A second measurement unit 110a for measuring the duration of the state is provided. For example, 80°C/sec can be set as the second value, and 50°C/sec can be set as the fourth value. In addition, this fourth value is also stored in the judgment value storage unit 120 like the first value, the second value, the third value, the first timer set value (first time), and the second timer set value (second time). have.

In the third embodiment, the determination unit 107b determines that the time measured by the first measurement unit 106 exceeds the first timer set value (first time), or the time measured by the second measurement unit 110a If the preset second timer set value (second time) is exceeded, it is determined as abnormal. In Embodiment 3, the first timer set value and the second timer set value may be 3 seconds. Further, in the third embodiment, the first timer setting value may be, for example, 3 seconds, and the second timer setting value may be 2 seconds.

Also in Embodiment 3, similarly to Embodiment 1 mentioned above, it becomes possible to fully utilize the ability of the heater 101 in the range which does not cause heater damage. Moreover, in Embodiment 3, two reference|standards of the temperature increase rate of the judgment made above can be prepared as a 2nd value and a 4th value, and can each be set in two temperature ranges. For this reason, for example, in a lower temperature area|region, the reference|standard of the temperature increase rate made into an ideal can be made into a faster value, for example, and a faster temperature rise is enabled. In addition, in the above-mentioned thing, although the judgment standard of a measurement temperature was made into two of a 1st value and a 3rd value, it is not limited to this, It is also possible to make three or more judgment criteria of a measurement temperature. In addition, according to this, it is also possible to set the reference|standard of the temperature increase rate of the judgment made into three or more into three or more.

Next, the operation example (abnormality determination method) of the temperature controller which concerns on Embodiment 3 is demonstrated using the flowchart of FIG.

First, in step S101, the calculation unit 103 obtains the measured change in temperature increase per unit time of the heater 101 as the temperature increase rate (first step). Next, in step S112, if the first detection unit 104 detects that the measured temperature of the heater 101 is greater than or equal to the preset first value and less than the third value (yes in step S112), the timer A first timer set value (first time) as a set value is selected and set in the determination value storage unit 120 (step S123), and a second value is selected and set in the determination value storage unit 120 as a temperature increase rate threshold (step S123) ( step S124). Thereafter, the flow advances to step S103.

On the other hand, if the first detection unit 104 detects that the measured temperature is equal to or greater than the third value (yes in step S125), the second timer setting value (second time) is selected from the determination value storage unit 120 as the timer setting value, is set (step S126), and a fourth value is selected from the determination value storage unit 120 as the temperature increase rate threshold and is set (step S127).

When it is detected by the 4th detection part 111 that the temperature increase rate exceeds the 4th value (yes in step S113), in step S104, the 1st measurement part 106 determines that the measured temperature exceeds the 3rd value, and It is judged whether or not the measurement of the time in which the state in which it is detected that the temperature increase rate exceeded the 4th value has started is judged. When the measurement of time has not started (no in step S104), in step S125, the second measurement unit 110a detects that the measured temperature exceeds the third value and that the temperature increase rate exceeds the fourth value, The measurement of the time for which the existing state continues (step 8) is started, and the process proceeds to step S116. Further, when the measurement of time is started (yes in step S104), the flow advances to step S116.

Next, in step S126, the determination unit 107b determines whether or not the measured time exceeds a second timer set value preset as a timer set value (9th step). If the measured time exceeds the second timer set value (yes in step S126), in step S127, the second measurement unit 110a stops (finishes) the time measurement, and in step S128, the determination unit 107b It is judged to be abnormal (step 9). In addition, the measurement of time continues while it is detected that the measurement temperature exceeded the 3rd value, and that the temperature increase rate exceeded the 4th value is detected (step S101 - step S126). If the determination unit 107b determines that there is an abnormality, the output unit 108 issues (outputs) an alarm as an abnormality process in step S129. In addition, when an end instruction is input, it ends (yes in step S131).

In addition, the first value (temperature reference) is 250 ° C., when the measured temperature is less than 250 ° C., the upper limit of the temperature increase rate is 80 ° C./s. When the measured temperature is 250 ° C. or more, the temperature increase rate is The upper limit can also be made into 50 degreeC/s. In addition, the first value is 100°C, the third value is 250°C, and when the measured temperature is less than 100°C, the upper limit of the temperature increase rate is 80°C/s, and the measured temperature is 100°C or more and 250 When it is less than °C, the upper limit of the temperature increase rate may be 50 °C/s, and when the measured temperature is 250 °C or higher, the upper limit of the temperature increase rate may be 40 °C/s.

If the measured temperature is less than 100°C, the upper limit of the temperature increase rate may be 80°C/s, and the time for determination may be, for example, 3s. In addition, when the measured temperature is 100 degreeC or more and less than 250 degreeC, the upper limit of the temperature increase rate may be 50 degreeC/s, and the time for determination may be 2 s, for example. In addition, when the measured temperature is 250 degreeC or more, the upper limit of the temperature increase rate may be 40 degreeC/s, and the time for determination may be 1 s, for example.

Moreover, as shown in FIG. 7, the calculation part, the 1st detection part, the 2nd detection part, the 3rd detection part, the 1st measurement part, the 2nd measurement part, and the determination part of the temperature controller which concerns on the above-mentioned embodiment are CPU(Central Processing Unit); A computer device including a central arithmetic processing unit) 301, a main memory unit 302, an external storage unit 303, a network connection unit 304, etc. By operation (executing a program), each of the above-described functions (abnormality determination method) can also be realized. The program is a program for the computer to execute the abnormality determination method shown in the above-described embodiment. The network connection device 304 connects to the network 305 . In addition, each function can also be distributed among a plurality of computer devices.

In addition, the calculation unit, the first detection unit, the second detection unit, the third detection unit, the first measurement unit, the second measurement unit, and the determination unit of the temperature controller in the above-described embodiment include a programmable logic device such as a field-programmable gate array (FPGA). It is also possible to configure by (PLD: Programmable Logic Device). For example, by providing the logic element of the FPGA with each of the calculation unit, the first detection unit, the second detection unit, the third detection unit, the first measurement unit, the second measurement unit, and the determination unit as circuits, the above-described function can be executed. Each of the calculation circuit, the first detection circuit, the second detection circuit, the third detection circuit, the first measurement circuit, the second measurement circuit, and the judgment circuit can be recorded in the FPGA by connecting a predetermined recording device. In addition, each of the circuits recorded in the FPGA can be confirmed by a recording device connected to the FPGA.

As described above, according to the present invention, the state in which the first detection unit detects that the measured temperature exceeds the first value, and the second detection unit detects that the temperature increase rate exceeds the second value Since it is judged as abnormal when the continuous time is measured and the time to be measured exceeds the preset first timer setting value, it becomes possible to fully utilize the capability of the heater in a range that does not cause damage to the heater.

In addition, this invention is not limited to embodiment demonstrated above, It is clear that many modifications and combinations can be implemented by those skilled in the art within the technical spirit of this invention. For example, in addition to the alarm shown in the above-described embodiment, an alarm may be issued when the measured temperature becomes greater than or equal to a set value. In addition, when the current flowing through the heater exceeds a preset value, an alarm may be issued. In addition, when the voltage applied to the heater exceeds a preset value, an alarm may be issued. By increasing the number of monitoring items, it can function as a more robust load protection function.

101 heater, 102 measurement unit, 103 calculation unit, 104 first detection unit, 105 second detection unit, 106 first measurement unit, 107 determination unit, 108 output unit, 120 determination value storage unit, 121 : Control.

Claims (8)

delete As a temperature controller for controlling the heating ability of the heater to control the temperature of the control object to a preset temperature,
a measuring unit configured to measure the temperature of the heater;
a calculation unit configured to obtain a change in temperature increase per unit time of the heater measured by the measurement unit as a temperature increase rate;
a first detection unit configured to detect that the measurement temperature measured by the measurement unit exceeds a preset first value;
a second detection unit configured to detect that the temperature increase rate obtained by the calculation unit exceeds a preset second value;
The first detection unit detects that the measured temperature exceeds the first value, and the second detection unit measures the duration of the state in which the temperature increase rate has detected that the second value is exceeded. a first measuring unit configured;
a determination unit configured to determine that the time measured by the first measurement unit exceeds a first preset time to be abnormal;
an output unit for outputting an alarm when the determination unit determines that there is an abnormality;
a third detection unit configured to detect that the measurement temperature measured by the measurement unit exceeds a preset third value higher than the first value;
The third detection unit detects that the measured temperature exceeds the third value, and the second detection unit measures the duration of the state detecting that the temperature increase rate exceeds the second value configured second measurement unit
to provide
Temperature characterized in that the determination unit determines that the time measured by the first measurement unit is abnormal when the time measured by the first measurement unit exceeds the first time, or when the time measured by the second measurement unit exceeds a preset second time controller. As a temperature controller for controlling the heating ability of the heater to control the temperature of the control object to a preset temperature,
a measuring unit configured to measure the temperature of the heater;
a calculation unit configured to obtain a change in temperature increase per unit time of the heater measured by the measurement unit as a temperature increase rate;
a first detection unit configured to detect that the measurement temperature measured by the measurement unit exceeds a preset first value;
a second detection unit configured to detect that the temperature increase rate obtained by the calculation unit exceeds a preset second value;
The first detection unit detects that the measured temperature exceeds the first value, and the second detection unit measures the duration of the state in which the temperature increase rate has detected that the second value is exceeded. a first measuring unit configured;
a determination unit configured to determine that the time measured by the first measurement unit exceeds a first preset time to be abnormal;
an output unit for outputting an alarm when the determination unit determines that there is an abnormality;
a third detection unit configured to detect that the measurement temperature measured by the measurement unit exceeds a preset third value higher than the first value;
a fourth detection unit configured to detect that the temperature increase rate obtained by the calculation unit exceeds a preset fourth value different from the second value;
The third detection unit detects that the measured temperature exceeds the third value, and the fourth detection unit detects that the temperature increase rate exceeds the fourth value. configured second measurement unit
to provide
Temperature characterized in that the determination unit determines that the time measured by the first measurement unit is abnormal when the time measured by the first measurement unit exceeds the first time, or when the time measured by the second measurement unit exceeds a preset second time controller. 4. The method of claim 2 or 3,
The temperature controller, characterized in that the first time and the second time are the same. delete An abnormality determination method of a temperature controller for controlling the heating ability of a heater to control the temperature of a control object to a preset temperature,
A first step of obtaining the measured temperature increase change per unit time as a temperature increase rate;
a second step of detecting that the measured temperature of the heater exceeds a preset first value;
A third step of detecting that the temperature increase rate obtained in the first step exceeds a preset second value;
In the second step, it is detected that the measured temperature exceeds the first value, and in the third step, it is detected that the temperature increase rate exceeds the second value is measured. a fourth step;
a fifth step of judging that the time measured in the fourth step exceeds the first preset time to be abnormal;
a sixth step of detecting that the measured temperature exceeds a third preset value higher than the first value;
In the sixth step, it is detected that the measured temperature exceeds the third value, and in the third step, it is detected that the temperature increase rate exceeds the second value is measured. a seventh step;
An eighth step of judging that the time measured in the seventh step exceeds the second preset time to be abnormal
An abnormality determination method of a temperature controller comprising a. An abnormality determination method of a temperature controller for controlling the heating ability of a heater to control the temperature of a control object to a preset temperature,
A first step of obtaining the measured temperature increase change per unit time as a temperature increase rate;
a second step of detecting that the measured temperature of the heater exceeds a preset first value;
A third step of detecting that the temperature increase rate obtained in the first step exceeds a preset second value;
In the second step, it is detected that the measured temperature exceeds the first value, and in the third step, it is detected that the temperature increase rate exceeds the second value is measured. a fourth step;
a fifth step of judging that the time measured in the fourth step exceeds the first preset time to be abnormal;
a sixth step of detecting that the measured temperature exceeds a third preset value higher than the first value;
a seventh step of detecting that the temperature increase rate obtained in the first step exceeds a preset fourth value different from the second value;
The sixth step detects that the measured temperature exceeds the third value, and the seventh step detects that the temperature increase rate exceeds the fourth value. Step 8;
A ninth step of judging that the time measured in the eighth step exceeds the second preset time to be abnormal
An abnormality determination method of a temperature controller comprising a. 8. The method according to claim 6 or 7,
The first time and the second time are the same, characterized in that the abnormality determination method of the temperature controller.

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