Unlock instant, AI-driven research and patent intelligence for your innovation.

Anomaly detection method and apparatus, and temperature regulator

By detecting the deviation between the observed quantity fed back from the control object and the target value, the problem of complexity and high cost of control loop abnormality detection in the existing technology is solved, and high-precision and low-cost abnormality detection is achieved, which is suitable for temperature control. and other fields.

Inactive Publication Date: 2006-07-05
OMRON CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in the related conventional example, if the operating amount continues to be below 0% or above 100%, abnormality cannot be detected, and thus, it cannot be detected when the operating amount exceeds 0% and is less than 100%. Detect anomalies, and in applications that require high-precision control, anomaly detection becomes lagging
[0014] In addition, in the conventional example described above, there is such a problem that in the case where the set temperature corresponds to the operation amount of 100%, that is, in the case where the operation amount in the steady state is 100%, for example, In the state where the operation amount is 100% and the set temperature is adjusted to 300°C, although it is in a normal state, since the operation amount is 100%, the temperature does not rise beyond the specified reference temperature range, so it is misjudged as abnormal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0069] figure 1 is a block diagram of a temperature control system with a temperature sensor of the present invention, corresponding to the above Figure 17 parts use the same reference numerals.

[0070] In this temperature control system, the temperature of a control object 1 such as a heating furnace is detected by a temperature sensor 2 and input to a temperature controller 3. In the temperature controller 3, the temperature is determined based on the target value (set temperature) and the detected temperature (observation value). , perform PID calculation, etc., output the operation signal (operation amount) to the SSR4, control the energization of the heater 5 by the AC power supply 6, and control the temperature of the control object 1 to a target value.

[0071] Thermostat 3 as figure 2 As shown, a display unit 60, an up key 61, a down key 62, a mode key 63, etc., which display the current temperature and the set temperature, etc., are provided on its front side.

...

no. 2 example

[0117] Figure 13 It is a configuration diagram of the abnormality detection part 14-1 of the temperature regulator of another embodiment of the present invention, corresponding to the above-mentioned image 3 parts use the same reference numerals.

[0118] In the above-mentioned embodiment, after satisfying the first condition signal as the determination output of the second determination means (first condition signal output means) 18 and the determination output as the third determination means (second condition signal output means) 19 In the case of the AND condition of the second condition signal, the abnormality determination device 20 determines that it is abnormal, and outputs an abnormality determination signal.

[0119] In this regard, in this embodiment, not only the same judgment as the above-mentioned first embodiment can be performed to detect abnormality, but also for existing known alarm signals, for example, when the detected temperature exceeds the preset upp...

no. 3 example

[0124] Figure 14 is a structural diagram of a temperature control system in yet another embodiment of the present invention, corresponding to the above figure 1 parts use the same reference numerals.

[0125] The temperature regulator 3 - 1 of this embodiment has a condition signal generation unit 65 instead of the abnormality detection unit 14 and the abnormality alarm unit 15 .

[0126] The condition signal generator 65 such as Figure 15 As shown in FIG. The upper limit alarm signal, the lower limit alarm signal, and the deviation alarm signal, which are alarm signals output from the alarm signal generators 66 to 68 , are output from the output terminal 69 to the program controller 70 as condition signals.

[0127] The abnormality detection is performed by the abnormality detection part 71 of the program controller 70 which received these condition signals. The operation of the abnormality detection unit 71 is set by the program controller 70, which is the same as tha...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

First determination means determines whether a deviation exceeds a threshold value, measurement means measures the period in which the deviation exceeds the threshold value in accordance with the determination result, second determination means determines whether the period in which the deviation exceeds the threshold value continues for a certain period or more in accordance with the measurement result, third determination means determines whether the absolute value of the deviation decreases, and trouble determination means determines that a trouble occurs when the period in which the deviation exceeds the threshold value continues for a certain period or more and the absolute value of the deviation does not decrease.

Description

technical field [0001] The present invention relates to an abnormality detection method of a control loop (control loop), such as an abnormality detection method such as an open circuit or a short circuit, an abnormality detection device, and a temperature regulator. An abnormality detection method, an abnormality detection device, and a temperature regulator for abnormality such as open circuit or short circuit in a loop. Background technique [0002] General temperature control systems such as Figure 17 As shown, the temperature of the control object 1 such as a heating furnace is detected by the temperature sensor 2, and is input to the temperature regulator 3'. In the temperature regulator 3', proportional integral differential is performed based on the set temperature (target value) and the detected temperature. (PID) calculation, etc., output an operation signal to the solid state relay (SSR) 4, control the energization of the heater 5 from the AC power supply 6, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02H05B3/00
CPCG05B23/0235G05B23/0262
Owner OMRON CORP