TW202109227A - Temperature controller and abnormality determination method - Google Patents

Abstract

To sufficiently take advantage of the capacity of a heater in a scope for causing no heater damage. A calculation unit obtains, as a temperature-rise rate, a temperature-rise change per unit time in a heater that is measured by a measurement unit. A first detection unit detects that a measured temperature measured by the measurement unit has exceeded a predetermined first value. A second detection unit detects that the temperature-rise rate obtained by the calculation unit has exceeded a predetermined second value. A first measuring unit measures a time in which a state, where the first detection unit detects that the measured temperature has exceeded the first value and the second detection unit detects that the temperature-rise rate has exceeded the second value, continues. A determination unit determines that an abnormality occurs when a time measured by the first measuring unit exceeds a predetermined first time.

Description

Temperature regulator and abnormal judgment method

The invention relates to a temperature regulator for controlling the temperature of a control object and an abnormality judgment method.

A thermostat that adjusts the temperature of various temperature environments, etc., displays the temperature of the monitoring object detected by a temperature sensor such as a thermocouple or a resistance temperature sensor, and displays the temperature based on the detected temperature and the set temperature. Obtain the control output to the heater and control the temperature of the monitored object.

In addition, the heater may be damaged if it is operated incorrectly. Therefore, for devices that control the heater, such as a temperature regulator, the following alarm settings or control output settings can usually be performed (see Patent Document 1 and Patent Document 2). The user of the heater uses these functions to output an alarm and limit the current flowing through the heater.

Monitor the temperature so that it does not heat to a temperature higher than the temperature specified by the heater manufacturer (temperature upper limit alarm). ·Monitor the rate of temperature change, so that it is not higher than the rate of temperature increase specified by the manufacturer of the heater (temperature change rate alarm). ·Monitor the upper limit of the control value (MV value) of the temperature regulator, and send out an alarm (MV value upper limit alarm) when it exceeds the alarm upper limit. ·Set the upper limit of the control value (MV value) (upper limit of the control value) so that the temperature regulator does not produce more than necessary output (upper limit of the control value setting). ·Measure the current flowing through the heater, and send out an alarm (overcurrent alarm) when a current above the set value flows.

Prior art literature Patent literature Patent Document 1: Japanese Patent Laid-Open No. 09-243098 Patent Document 2: Japanese Patent Laid-Open No. 01-298385

As mentioned above, the heater may be damaged due to operating errors. For example, when it is desired to increase the temperature at a temperature change rate higher than the rated value (for example, 100°C/s), the heater is broken. The temperature change rate varies with each type of heater, and the specifications related to the temperature change rate are indicated by the heater manufacturer. Heater characteristics sometimes change depending on the temperature, and the temperature change rate differs depending on the temperature range. However, most of the specifications related to the temperature change rate indicated by the heater manufacturer are representative values that can be used safely in the entire temperature range. Therefore, for example, even if the specification related to the temperature change rate indicated by the heater manufacturer is 50°C/s, in practice, if it is 200°C or less, the heater will not be damaged even if it is 80°C/s.

In addition, as a characteristic of the heater, even if the temperature is changed to a predetermined temperature change rate or higher, if the change time is a short time, the deterioration may not occur. For example, even if the specification related to the temperature change rate indicated by the heater manufacturer is 50°C/s, if the time of 80°C/s is 10s or less, the heater will not be damaged.

The usual temperature change rate alarm is set based on the temperature change rate indicated by the heater manufacturer. When the set value is exceeded, the temperature regulator outputs an alarm and reduces the output MV value (for example, set to 0%). However, the limit of this control is set based on the temperature change rate indicated by the heater manufacturer. Therefore, depending on the temperature of the heater or the time when the temperature change rate exceeds the upper limit, sometimes it will not cause heating even if the limit is exceeded. Damage to the device. In this way, when the heater can be used without causing damage even if the limit is exceeded, by using the heater within the above-mentioned range, there is a possibility that the controllability of the temperature can be improved.

As described above, although heater damage can be prevented in the past, there are problems such as insufficient performance of the heater.

The present invention is made in order to eliminate the above-mentioned problems, and its object is to fully exhibit the capabilities of the heater within a range that does not cause damage to the heater.

The temperature regulator of the present invention controls the heating capacity of the heater, and controls the temperature of the controlled object to a preset temperature. The temperature regulator includes: a measuring part configured to measure the temperature of the heater; and a calculating part configured to obtain The temperature rise per unit time of the heater measured by the measuring part is taken as the temperature increase rate; the first detection part is configured to detect that the measured temperature measured by the measuring part exceeds a preset first value; the second detection part is configured to The temperature increase rate calculated by the detection and calculation unit exceeds the second preset value; the first measurement unit is configured to measure the duration of the state in which the first detection unit detects that the measured temperature exceeds the first value, and The second detection unit detects a state where the rate of temperature rise exceeds the second value; the determination unit is configured to determine that it is abnormal when the time measured by the first measurement unit exceeds the first time set in advance; and the output unit, when the determination unit determines that it is abnormal When, an alarm is output.

An example of the configuration of the temperature regulator further includes: 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; and a second measurement unit configured to In order to measure the duration of the following state, the state is a state in which the third detection unit detects that the measured temperature exceeds the third value, and the second detection unit detects that the temperature rise rate exceeds the second value. When the first measurement unit measures the time When the first time is exceeded, or the time measured by the second measuring unit exceeds the preset second time, the judging unit determines that it is abnormal.

An example of the configuration of the temperature regulator further includes: a third detection unit configured to detect that the measured temperature measured by the measuring unit exceeds a preset third value higher than the first value; and a fourth detection unit configured to The temperature increase rate calculated by the detection calculation unit exceeds a preset fourth value different from the second value; and the second measurement unit is configured to measure the duration of a state in which the measurement is detected by the third detection unit The temperature exceeds the third value and the fourth detection unit detects that the heating rate exceeds the fourth value. When the time measured by the first measurement unit exceeds the first time, or the time measured by the second measurement unit exceeds the preset second time At the time, the judgment unit judged it to be abnormal.

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

The abnormality determination method of the present invention includes: a first step of obtaining the measured temperature rise per unit time of the heater as a temperature increase rate; a second step of detecting that the measured temperature of the heater exceeds a preset first The third step is to detect that the temperature rise rate calculated in the first step exceeds the preset second value; the fourth step is to measure the duration of the following state, the state is that the measured temperature is detected in the second step to exceed The first value, and a state in which the heating rate exceeds the second value is detected in the third step; and in the fifth step, when the time measured in the fourth step exceeds the preset first time, it is judged as abnormal.

In a configuration example of the abnormality judgment method, it further includes: a sixth step, detecting that the measured temperature exceeds a preset third value higher than the first value; and the seventh step, measuring the duration of the following state, the state In the sixth step, it is detected that the measured temperature exceeds the third value and the temperature rise rate exceeds the second value in the third step; and in the eighth step, when the measured time in the seventh step exceeds the preset first value At the second time, it is judged to be abnormal.

In a configuration example of the abnormality determination method, it further includes: a sixth step of detecting that the measurement temperature measured by the measuring unit exceeds a preset third value higher than the first value; a seventh step of detecting that the temperature obtained in the first step The temperature rise rate is higher than the second value. The fourth step is higher than the second value. The eighth step is to measure the duration of the following state. The state is that the sixth step detects that the measured temperature exceeds the third value, and the seventh step A state in which the heating rate exceeds the fourth value is detected; and in the ninth step, when the time measured in the eighth step exceeds the second time set in advance, it is judged as abnormal.

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

As described above, according to the present invention, the duration of the state is measured in which the first detection unit detects that the measured temperature exceeds the first value and the second detection unit detects that the temperature rise rate exceeds the second value. When the measured time exceeds the preset first time, it is judged to be abnormal, so the heater's ability can be fully utilized within the range of not causing damage to the heater.

Hereinafter, the temperature regulator according to the embodiment of the present invention will be described.

Embodiment 1 First, referring to Fig. 1, a temperature regulator according to Embodiment 1 of the present invention will be described. The temperature regulator controls the heating capacity of the heater 101, and controls the temperature of the controlled object to a preset temperature. The temperature regulator 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 judgment unit 107, an output unit 108, a judgment value storage unit 120, and a control unit 121.

The measuring unit 102 measures the temperature of the heater 101. The control unit 121 generates and outputs a control value for operation control of the heater 101 based on the relationship between the measurement temperature measured by the measurement unit 102 and the set set temperature. The heater 101 heats the control object.

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

The first measurement unit 106 measures the duration of the state in which 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. When the time measured by the first measurement unit 106 exceeds the preset first timer setting value stored in the determination value storage unit 120 (first time), the determination unit 107 determines that it is abnormal. The first timer setting value can be set to, for example, 2 seconds. When the determination unit 107 determines that it is abnormal, the output unit 108 outputs an alarm. For example, it is displayed that an abnormality has occurred on a display unit not shown. In addition, a horn, loudspeaker, etc. is used to give a notification by sound or the like as an alarm.

For example, in the past, when the specification related to the temperature change rate indicated by the heater manufacturer is 50° C./s, 50° C./s is set as the determination value of the temperature rise rate obtained from the measured temperature. Therefore, when the temperature increase rate obtained from the measured temperature becomes 50° C./s or more, an alarm is issued and restrictions such as setting the control value output to the heater 101 to 0 are performed.

In this abnormality avoidance control, for example, if the heater 101 is practically 200°C or less, the heater will not be damaged even if it is 80°C/s, even when it is used in a low temperature range where the heating temperature is lower than 200°C. It is not possible to set the temperature increase rate to 50°C/s or more. On the other hand, in this heat treatment, for example, when the temperature increase rate is increased, the treatment time can be shortened.

In contrast, according to Embodiment 1, if the heating temperature is lower than 250°C, for example, even if the temperature increase rate becomes 50°C/s or more, it is not judged as abnormal. In addition, even if the heating temperature is 250°C or higher, if the time for the temperature increase rate to become 50°C/s or higher is 9 seconds or less, it is not judged as abnormal. Therefore, according to the first embodiment, the temperature increase rate can be further increased, and the processing time can be shortened. For example, by using a heater that can be used at a higher rate of temperature increase, even in an existing control using a rated value, the rate of temperature increase can be further increased, and the processing time can be shortened. However, such high-speed heating heaters are expensive, which leads to an increase in cost. In contrast, according to the first embodiment, it is not necessary to use an expensive heater. In this way, according to the first embodiment, the ability of the heater 101 can be fully exhibited within a range that does not cause damage to the heater.

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

First, in step S101, the calculation unit 103 obtains the measured temperature rise change per unit time of the heater 101 as the temperature rise rate (first step). Next, in step S102, the first detection unit 104 detects that the measured temperature of the heater 101 exceeds the first value set in advance stored in the determination value storage unit 120 (second step). When the first detection unit 104 detects that the measured temperature exceeds the first value (yes in step S102), in step S103, the second detection unit 105 detects that the calculated temperature increase rate exceeds the value stored in the determination value storage unit 120 The preset second value (third step).

When the second detection unit 105 detects that the temperature increase rate exceeds the second value (yes in step S103), in step S104, it is determined whether the first measurement unit 106 has started measuring the duration of the following state, that is, detecting To the state where the heating rate exceeds the second value. When the time measurement has not started (no in step S104), in step S105, the first measuring unit 106 starts to measure the duration of the following state, that is, detecting that the measured temperature exceeds the first value and the temperature rise rate exceeds the second Value state (fourth step), go to step S106. In addition, when the time measurement has started (yes in step S104), the process proceeds to step S106.

Next, in step S106, the determination unit 107 determines whether the measured time exceeds the preset first timer setting value (first time) stored in the determination value storage unit 120 (fifth step). When the measured time exceeds the first timer setting value (yes in step S106), in step S107, the first measuring unit 106 stops (ends) measuring the time, and in step S108, the judging unit 107 judges that it is abnormal (No. Five steps). In addition, the measurement of time continues while it is detected that the measured temperature exceeds the first value and that the temperature increase rate exceeds the second value (step S101 to step S106). When the determination unit 107 determines that it is abnormal, abnormal processing is performed in step S109 (the amount of operation when the jump is abnormal, an alarm is issued, etc.). After the exception processing, the state is maintained until the release operation is performed in step S131.

Embodiment 2 Next, a temperature regulator according to Embodiment 2 of the present invention will be described with reference to FIG. 3. The temperature regulator controls the heating capacity of the heater 101, and controls the temperature of the controlled object to a preset temperature. The temperature regulator 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, a judgment value storage unit 120, and a control unit 121. These parts are the same as in the first embodiment described above.

The second embodiment also has: a preset third value, which is a threshold value for measuring temperature, which is higher than the first value; the first time, when the measured temperature is greater than the first value and less than the third value, it is suitable for the first timer And the second time, when the measured temperature is above the third value, it is applicable as the second timer setting value. In addition, the third value and the second timer setting value (second time) are also stored in the judgment value storage unit 120 in the same manner as the first value, second value, and first timer setting value (first time). In the second embodiment, for example, 100° C. can be set as the first value, 50° C./sec can be set as the second value (heating rate threshold value), and 250° C. can be set as the third value.

In addition, in Embodiment 2, when the time measured by the first measuring unit 106 exceeds the first timer setting value, or the time measured by the second measuring unit 110 exceeds the preset second timer setting value, the determining unit 107a determines that abnormal. In Embodiment 2, the first timer setting value can be set to 3 seconds, for example, and the second timer setting value can be set to 2 seconds. In addition, the first timer setting value and the second time may be set to the same value.

In the second embodiment, as in the first embodiment described above, the ability of the heater 101 can be fully exhibited within a range that does not cause damage to the heater. In addition, in the second embodiment, it is possible to set the time reference for the judgment considered to be abnormal in two temperature ranges. Therefore, for example, in a lower temperature range, the criterion for determining the abnormality time can be further extended, and for example, a more rapid temperature rise can be achieved. In addition, in the above, the determination criterion of the measured temperature is set to both the first value and the third value, but it is not limited to this, and the determination criterion of the measured temperature may be set to three or more.

Next, the operation example (abnormality determination method) of the temperature regulator of Embodiment 2 is demonstrated using the flowchart of FIG. In addition, the abnormality determination based on the first timer setting value using the first value and the second value is the same as that of the first embodiment described above, and the description is omitted below.

First, in step S101, the calculation unit 103 obtains the measured temperature rise change per unit time of the heater 101 as the temperature rise rate (first step). Next, in step S112, when 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 determination value The storage unit 120 selects the first timer setting value (first time) and sets it as the timer setting value (step S113). Then, it proceeds to step S103.

On the other hand, when the first detection unit 104 detects that the measured temperature is 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 and It is set to the timer setting value (step S115). Next, in step S103, the second detection unit 105 detects that the temperature increase rate exceeds a predetermined second value.

When the second detection unit 105 detects that the temperature increase rate exceeds the second value (yes in step S103), in step S104, it is determined whether the first measurement unit 106 has started measuring the duration of the following state, that is, detecting To the state where the heating rate exceeds the second value. When the time measurement has not started (No (no) in step S104), in step S115, the second measuring unit 110 starts to measure the duration of the following state, that is, detecting that the measured temperature exceeds the third value and the temperature rise rate exceeds the second Value state (seventh step), go to step S116. In addition, when the time measurement has started (yes in step S104), the process proceeds to step S116.

Next, in step S116, the determination unit 107a determines whether the measured time exceeds a preset second timer setting value (second time). When the measured time exceeds the second timer setting value (yes in step S116), in step S117, the second measuring unit 110 stops (ends) measuring the time, and in step S118, the judging unit 107a judges that it is abnormal (No. Eight steps). In addition, the measurement of time continues while it is detected that the measured temperature exceeds the third value and the temperature increase rate is detected to exceed the second value (step S101 to step S116). When the judging unit 107a judges that it is abnormal, abnormal processing is performed in step S119 (the operation amount when the jump is abnormal, an alarm is issued through the output unit 108, etc.). After the exception processing, the state is maintained until the release operation is performed in step S131.

Embodiment 3 Next, a temperature regulator according to Embodiment 3 of the present invention will be described with reference to FIG. 5. The temperature regulator controls the heating capacity of the heater 101, and controls the temperature of the controlled object to a preset temperature. The temperature regulator 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, a judgment value storage unit 120, and a control unit 121. These parts are the same as in the first embodiment described above.

The third embodiment also has: a preset third value, which is higher than the first value as a threshold value for the measured temperature; a second value, which is applied as the temperature rise rate threshold value when the measured temperature is greater than the first value and less than the third value ; And the fourth value, when the measured temperature is above the third value, it is applicable as the temperature rise rate threshold. In Embodiment 3, for example, 100°C can be set as the second value, and 250°C can be set as the third value.

In addition, the third embodiment includes: a second measurement unit 110a that measures the duration of a state in which the third detection unit 109 detects that the measured temperature exceeds the third value, and the fourth detection unit 111 detects the rate of temperature increase The state of exceeding the fourth value. For example, 80°C/sec may be set as the second value, and 50°C/sec may be set as the fourth value. In addition, the fourth value is also stored in the judgment value in the same way as the first value, the second value, the third value, the first timer setting value (first time), and the second timer setting value (second time). The memory unit 120.

In addition, in Embodiment 3, when the time measured by the first measuring unit 106 exceeds the first timer setting value (first time), or the time measured by the second measuring unit 110a exceeds the preset second timer setting value (first time) (2 time), the determination unit 107b determines that it is abnormal. In Embodiment 3, the first timer setting value and the second timer setting value can be set to 3 seconds. In addition, in Embodiment 3, the first timer setting value may be set to 3 seconds, for example, and the second timer setting value may be set to 2 seconds.

In the third embodiment, as in the first embodiment described above, the ability of the heater 101 can be fully exhibited within a range that does not cause damage to the heater. In addition, in Embodiment 3, both the second value and the fourth value may be prepared, and the reference of the temperature increase rate determined as an abnormality may be set in each of the two temperature ranges. Therefore, for example, in a lower temperature range, the reference of the temperature increase rate considered to be abnormal can be set to a faster value, for example, a faster temperature increase can be achieved. In addition, in the above, the determination criterion of the measured temperature is set to both the first value and the third value, but it is not limited to this, and the determination criterion of the measured temperature may be set to three or more. In addition, in accordance with this, the reference of the temperature increase rate for judgment considered as an abnormality may be set to three or more.

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

First, in step S101, the calculation unit 103 obtains the measured temperature rise change per unit time of the heater 101 as the temperature rise rate (first step). Next, in step S112, when 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 determination value The storage unit 120 selects the first timer setting value (first time) and sets it as the timer setting value (step S123), and selects the second value from the judgment value storage unit 120 and sets it as the temperature increase rate threshold value (step S124). Then, it proceeds to step S103.

On the other hand, when the first detection unit 104 detects that the measured temperature is 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 and It is set as the timer setting value (step S126), and the fourth value is selected from the determination value storage unit 120 and set as the temperature increase rate threshold value (step S127).

When the fourth detection unit 111 detects that the temperature increase rate exceeds the fourth value (yes in step S113), in step S104, it is determined whether the first measurement unit 106 has started measuring the duration of the following state, that is, detecting To the state where the measured temperature exceeds the third value and the temperature increase rate exceeds the fourth value. When the time measurement has not started (No (no) in step S104), in step S105, the second measuring unit 110a starts to measure the duration of the following state, that is, it is detected that the measured temperature exceeds the third value and the temperature rise rate exceeds the fourth value. Value state (eighth step), go to step S116. In addition, when the time measurement has started (yes in step S104), the process proceeds to step S116.

Next, in step S116, the determination unit 107b determines whether the measured time exceeds the second timer setting value preset as the timer setting value (ninth step). When the measured time exceeds the second timer setting value (Yes in step S116), in step S117, the second measuring unit 110a stops (ends) measuring the time, and in step S118, the judging unit 107b judges that it is abnormal (No. Nine steps). In addition, the measurement of time continues while it is detected that the measured temperature exceeds the third value and that the temperature increase rate exceeds the fourth value (step S101 to step S116). When the determination unit 107b determines that it is abnormal, in step S119, the output unit 108 issues (outputs) an alarm as abnormal processing. In addition, it ends when the end instruction is input (yes in step S131).

In addition, the first value (temperature reference) can also be set to 250°C. When the measured temperature is lower than 250°C, the upper limit of the temperature rise rate can be set to 80°C/s. When the measured temperature is 250°C In the above, the upper limit of the temperature increase rate is set to 50°C/s. In addition, you can also set the first value to 100°C and the third value to 250°C. When the measured temperature is lower than 100°C, set the upper limit of the heating rate to 80°C/s. When the temperature is 100°C or higher and less than 250°C, set the upper limit of the heating rate to 50°C/s, and when the measured temperature is 250°C or higher, set the upper limit of the heating rate to 40°C/s .

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

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 judgment unit of the temperature regulator of the above-mentioned embodiment may also be set as shown in FIG. It is a computer equipment including a central processing unit (CPU) 301, a main memory device 302, an external memory device 303, and a network connection device 304. The CPU 301 runs (executes the program) according to the program developed in the main memory device. , So as to realize the functions described above (abnormal judgment method). The program is a program used by a computer to execute the abnormality determination method shown in the above-mentioned embodiment. The network connection device 304 is connected to the network 305. In addition, each function can also be distributed to multiple 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 judgment unit of the temperature regulator of the above-mentioned embodiment may also include on-site programmable Design gate array (Field-Programmable Gate Array, FPGA) and other programmable logic devices (Programmable Logic Device, PLD). For example, by making the logic element of the FPGA include a calculation part, a first detection part, a second detection part, a third detection part, a first measurement part, a second measurement part, and a judgment part in the form of a circuit, the above can be executed. The described function. 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 each be connected to a predetermined writing device and write to the FPGA. In addition, the circuits written to the FPGA can also be confirmed by a writing device connected to the FPGA.

As explained above, according to the present invention, the duration of the state is measured in which the first detection unit detects that the measured temperature exceeds the first value, and the second detection unit detects that the temperature rise rate exceeds the second value. , When the measured time exceeds the preset first timer setting value, it is judged as abnormal, so the heater's ability can be fully utilized within the range that does not cause damage to the heater.

In addition, it is obvious that the present invention is not limited to the embodiments described above, and various modifications and combinations can be implemented by a person having ordinary knowledge in the art within the technical idea of the present invention. For example, in addition to the alarm shown in the above embodiment, an alarm may be issued when the measured temperature becomes equal to or higher than the set value. In addition, an alarm can also be issued when the current flowing through the heater exceeds a set value. In addition, an alarm can also be issued when the voltage applied to the heater exceeds a set value. It can also function as a stronger load protection function by adding monitoring items.

101: heater 102: Measurement Department 103: Computing Department 104: The first detection department 105: The second detection department 106: The first measurement department 107, 107a, 107b: Judgment section 108: output section 109: Third Inspection Department 110, 110a: the second measurement part 120: Judgment value memory 121: Control Department 301: CPU 302: main memory device 303: External memory device 304: network connection device 305: Network S101～S109, S112～S119, S123, S124, S126, S127, S131: steps

Fig. 1 is a configuration diagram showing the configuration of a temperature regulator according to Embodiment 1 of the present invention. Fig. 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 regulator according to Embodiment 2 of the present invention. Fig. 4 is a flowchart for explaining the abnormality determination method according to the second embodiment of the present invention. Fig. 5 is a configuration diagram showing the configuration of a temperature regulator according to Embodiment 3 of the present invention. Fig. 6 is a flowchart for explaining the abnormality determination method according to the third embodiment of the present invention. 7 is a configuration diagram showing the hardware configuration 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 judgment unit of the temperature regulator according to the embodiment of the present invention .

101: heater

102: Measurement Department

103: Computing Department

104: The first detection department

105: The second detection department

106: The first measurement department

107: Judgment Department

108: output section

120: Judgment value memory

121: Control Department

Claims (8)

A temperature regulator, which controls the heating capacity of a heater, and controls the temperature of a controlled object to a preset temperature, the temperature regulator includes: A measuring unit configured to measure the temperature of the heater; A calculation unit configured to obtain a temperature rise change per unit time of the heater measured by the measurement unit as a temperature increase rate; The first detection unit is 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 calculated by the calculation unit exceeds a preset second value; The first measuring unit is configured to measure the duration of a state in which the first detection unit detects that the measured temperature exceeds the first value, and the second detection unit detects the temperature increase A state where the speed exceeds the second value; A determining unit configured to determine that it is abnormal when the time measured by the first measuring unit exceeds a preset first time; and The output unit outputs an alarm when the judgment unit judges that it is abnormal. The temperature regulator as described in claim 1, further including: 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; and The second measurement unit is configured to measure the duration of the state in which the third detection unit detects that the measured temperature exceeds the third value, and the second detection unit detects the temperature increase The state where the speed exceeds the second value, When the time measured by the first measurement unit exceeds the first time, or the time measured by the second measurement unit exceeds a preset second time, the judgment unit judges that it is abnormal. The temperature regulator according to claim 1, which is characterized by further comprising: 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 calculated by the calculation unit exceeds a preset fourth value different from the second value; and The second measurement unit is configured to measure the duration of the state in which the third detection unit detects that the measured temperature exceeds the third value, and the fourth detection unit detects the temperature increase A state where the speed exceeds the fourth value, When the time measured by the first measurement unit exceeds the first time, or the time measured by the second measurement unit exceeds a preset second time, the judgment unit judges that it is abnormal. The temperature regulator according to claim 2 or 3, wherein the first time is the same as the second time. An abnormal judgment method, including: The first step is to obtain the measured temperature rise change per unit time of the heater as the temperature rise rate; The second step is to detect that the measured temperature of the heater exceeds a preset first value; The third step is to detect that the heating rate obtained in the first step exceeds a preset second value; The fourth step is to measure the duration of the state in which the measured temperature exceeds the first value in the second step and the temperature increase rate is detected in the third step The state exceeding the second value; and In the fifth step, when the time measured in the fourth step exceeds the preset first time, it is determined to be abnormal. The abnormal judgment method described in claim 5 further includes: The sixth step, detecting that the measured temperature exceeds a preset third value higher than the first value; The seventh step is to measure the duration of the state in which it is detected in the sixth step that the measured temperature exceeds the third value, and the temperature increase rate is detected in the third step The state exceeding the second value; and In the eighth step, when the time measured in the seventh step exceeds a preset second time, it is determined to be abnormal. The abnormal judgment method described in claim 5 further includes: The sixth step, detecting that the measured temperature exceeds a preset third value higher than the first value; In the seventh step, detecting that the heating rate obtained in the first step exceeds a preset fourth value different from the second value; The eighth step is to measure the duration of the following state, the state is that the sixth step detects that the measured temperature exceeds the third value, and the seventh step detects that the temperature rise rate exceeds the first Four-value status; and In the ninth step, when the time measured in the eighth step exceeds a preset second time, it is judged as abnormal. The abnormality judgment method according to claim 6 or 7, wherein the first time is the same as the second time.

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