Method for detecting reasonable soundness index of device

Abstract

The present invention relates to a method for detecting a reasonable soundness index of a device, the method comprising: classifying a device into an intermittent driving type and a continuous driving type according to a pattern in which the device operates; selecting a detection item capable of effectively detecting the soundness of a device according to the type of the device for which the soundness is to be detected; and then, configuring an appropriate weight for the selected item, and applying the weight configured for each item to a soundness value of the detection item detected on the basis of a real-time current waveform of the device, thereby compensating for the type of the device according to various operation patterns so as to enable detection of a very reasonable soundness index of the device.

Description

Method for detecting a reasonable health index of a device

[0001] The present invention relates to a method for detecting a reasonable health index of a device, and more particularly, to a method for detecting a reasonable health index of a device, which classifies devices into intermittent operation types and continuous operation types according to the operation pattern of the device, selects detection items capable of effectively detecting the health of the device according to the type of the device whose health is to be detected, sets weights appropriate to the selected items, and applies the weights set to each item to the health value of the detection items detected based on the current waveform of the device in real time, thereby compensating for the type of the device according to various operation patterns, thereby detecting a very reasonable health index of the device.

[0002] In general, stable operation is very important for various devices used for automation processes of facilities.

[0003] For example, in the facilities of a large-scale production plant, tens or hundreds of devices are installed and operate in conjunction with each other to continuously produce products. If a single device among the many devices breaks down, a catastrophic situation can occur where the entire operation of the facility comes to a halt.

[0004] At this time, downtime due to equipment failure inevitably leads to enormous losses not only in equipment repair costs but also in operating costs and business effects wasted while the equipment is down.

[0005] To avoid such unexpected downtime costs, the present applicant has developed and proposed a method for detecting the health index of a device that can provide information on the real-time status of the device to the manager, thereby enabling efficient management of the device by performing inspection and repair before the device malfunctions.

[0006] However, the health index detection methods of the device developed and proposed by the present applicant detected the health of the device by applying the current value consumed by the device to a specific detection method, and since such detection method is uniformly applied to all devices used in various operation patterns, there was a problem in that the reliability of the detected health of the device was somewhat low.

[0007] The present invention has been proposed to solve the above-mentioned problems, and its purpose is to provide a reasonable health index detection method of a device, which can detect a very reasonable health index of a device by dividing the device into an intermittent operation type and a continuous operation type according to the operation pattern of the device, selecting a detection item capable of effectively detecting the health of the device according to the type of the device whose health is to be detected, and then setting an appropriate weight for the selected item, and applying the weight set for each item to the health value of the detection item detected based on the current waveform of the device in real time, thereby compensating for the type of the device according to various operation patterns.

[0008] In addition, in order to detect the health of the device, various detection items such as starting current items, constant current items, load time items, ground fault current items, and current unbalance rate items are presented, and the health of the device in real time is detected based on the weights assigned to each of the presented items according to the type of device, thereby providing a method for detecting a reasonable health index of the device that can secure excellent reliability for the reasonable health index of the device being detected.

[0009] In order to achieve the above object, the present invention provides a reasonable health index detection method for a device, comprising: a detection item classification step (S10) of dividing the detection items into a starting current item for detecting the health of the device based on a current state in a peak section where the current size is formed to a maximum in a current waveform constructed by collecting information on changes in the current size consumed over time in a device driven to perform an operation; a constant current item for detecting the health of the device based on a current state in a constant section where the current size is continuously maintained in a certain range in the current waveform; and a load time item for detecting the health of the device based on a time during which a current waveform measured and collected from the device within a set detection time exceeds a set reference value; a device type classification step (S20) of dividing the device into an intermittent operation type and a continuous operation type based on an operation pattern of the device; a weight setting step (S30) of selecting the type of the device for which health is to be detected from among intermittent and continuous operation types, and selecting at least two items from among the starting current item, the constant current item, and the load time item based on the selected type, and setting weights for each of the selected items; It is characterized by including a detection step (S40) for detecting the health of the device by applying the real-time current waveform measured and collected from the device performing real-time operation to each item selected in the weight setting step (S30), and then applying the set weight to each item to detect a reasonable health index of the real-time device.

[0010] In addition, in the device type classification step (S20), a device having a pattern with a short operating time and a large number of operations is classified as a single-action type, and a device having a pattern with a long operating time and a small number of operations is classified as a continuous-action type.

[0011] In addition, in the weight setting step (S30), if the device corresponds to a single-speed drive type, the starting current item is necessarily selected and the weight is set higher than other items, and if the device corresponds to a continuous drive type, the constant-speed current item is necessarily selected and the weight is set higher than other items.

[0012] In addition, the above-mentioned starting current item sets a starting reference value by considering the rated current of the device, and detects the health of the device by comparing the current value of the peak section in the current waveform of the device with the starting reference value, the above-mentioned constant-speed current item sets a constant-speed reference value by considering the rated current of the device, and detects the health of the device by comparing the current value of the constant-speed section in the current waveform of the device with the constant-speed reference value, and the above-mentioned load time item is characterized in that it detects the health of the device based on the time during which the current value of the peak section in the current waveform of the device exceeds the starting reference value and the time during which the current value of the constant-speed section exceeds the constant-speed reference value within the set detection time.

[0013] In addition, the above-mentioned starting current item sets a starting reference value that is higher than the rated current of the device, and if the current value of the peak section in the current waveform of the device is less than the starting reference value, it is detected as a stable state, and if the current value of the peak section exceeds the starting reference value, it is detected as an unstable state, and the health of the device is judged, but if the device is in a stable state, a health value of 1 is given, and if the device is in an unstable state, a health value of less than 1 is given, and the above-mentioned constant-speed current item sets a constant-speed reference value that is smaller than the rated current of the device, and if the current value of the constant-speed section in the current waveform of the device is less than the constant-speed reference value, it is detected as a stable state, and if the current value of the constant-speed section exceeds the constant-speed reference value, it is detected as an unstable state, and the health of the device is judged, but if the device is in a stable state, a health value of 1 is given, and if the device is in an unstable state, a health value of less than 1 is given, and the above-mentioned load time item sets a load reference time so that if the sum of the time during which the current value of the peak section in the current waveform of the device exceeds the starting reference value and the time during which the current value of the constant-speed section exceeds the constant-speed reference value within the set detection time is less than the load reference time, the device is judged as a stable state. The method is characterized in that the weight setting step (S30) sets a weight % for each item selected according to the type of the device whose health is to be detected based on the real-time current waveform measured from the device in real time, and then multiplies the health value of each item by the weight % set for each item to detect the health index of each item, and then adds up the health indexes of each item to detect a reasonable health index.

[0014] In addition, the detection item classification step (S10) is characterized by further including a ground fault current item that detects a difference value between the amount of power supplied to a device performing an operation and the amount of power consumed by the device, and detects the health of the device based on the detected difference value, and a current unbalance rate item that detects an unbalance rate of current values ​​supplied to three phases (R phase, S phase, T phase) of the device, and detects the health of the device based on the unbalance rate of the three phases.

[0015] In addition, the device type classification step (S20) is characterized by further including an irregular operation type that distinguishes a device having an irregular pattern in operation time or number of operations.

[0016] As described above, according to the method for detecting a reasonable health index of a device according to the present invention, the device is divided into an intermittent operation type and a continuous operation type according to the operation pattern of the device, and a detection item capable of effectively detecting the health of the device is selected according to the type of the device whose health is to be detected, and then a weight appropriate to the selected item is set, and the health value of the detection item detected based on the current waveform of the device in real time is applied with the weight set for each item, thereby compensating for the type of the device according to various operation patterns, and thus there is an effect of detecting a very reasonable health index of the device.

[0017] In addition, in order to detect the health of the device, various detection items such as starting current items, constant current items, load time items, ground fault current items, and current unbalance rate items are presented, and the health of the device in real time is detected based on the weights assigned to each of the presented items according to the type of device, thereby securing excellent reliability for the reasonable health index of the detected device.

[0018] FIG. 1 is a block diagram of a method for detecting a reasonable health index of a device according to an embodiment of the present invention.

[0019] FIGS. 2 to 10 are drawings for explaining a reasonable health index detection method of the device illustrated in FIG. 1.

[0020] A method for detecting a reasonable health index of a device according to a preferred embodiment of the present invention is described in detail with reference to the attached drawings. Detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention are omitted.

[0021] FIGS. 1 to 10 illustrate a method for detecting a reasonable health index of a device according to an embodiment of the present invention. FIG. 1 is a block diagram of a method for detecting a reasonable health index of a device according to an embodiment of the present invention, and FIGS. 2 to 10 are drawings for explaining a method for detecting a reasonable health index of the device illustrated in FIG. 1.

[0022] As illustrated in FIG. 1, a method (100) for detecting a reasonable health index of a device according to an embodiment of the present invention includes a detection item classification step (S10), a device type classification step (S20), a weight setting step (S30), and a detection step (S40).

[0023] The above detection item classification step (S10) is a step that classifies the detection items into a starting current item that detects the health of the device based on the current status of the peak section in which the current size is formed to the maximum (peak) in the current waveform constructed by collecting information on changes in the current size consumed over time in the device driven to perform an operation, a constant current item that detects the health of the device based on the current status of the constant speed section in which the current size is continuously maintained within a certain range in the current waveform, and a load time item that detects the health of the device based on the time in which the current waveform measured and collected from the device within the set detection time exceeds the set reference value.

[0024] Typically, a device that operates based on power, for example, a device that operates based on an electric motor, when the device is driven to perform an operation, as shown in Fig. 2, a high current is required at the time of starting the operation, so that the current size is large. After that, when the device is normally operated and stabilized, the current size is maintained within a certain range.

[0025] That is, in the detection item classification step (S10), information on changes in the current size consumed over time in the device being driven to perform an operation is collected to construct a current waveform, and in the constructed current waveform, a section in which the current size is formed high at the time when the driving starts is set as a peak section, and a section in which the driving is stabilized and the current size is maintained within a certain range is set as a constant speed section. The starting current item sets a starting reference value in consideration of the rated current of the device, and detects the health of the device by comparing the current value of the peak section in the current waveform of the device with the starting reference value. The constant speed current item sets a constant speed reference value in consideration of the rated current of the device, and detects the health of the device by comparing the current value of the constant speed section in the current waveform of the device with the constant speed reference value. The load time item detects the health of the device based on the time during which the current value of the peak section in the current waveform of the device exceeds the starting reference value and the time during which the current value of the constant speed section exceeds the constant speed reference value within the set detection time.

[0026] In detail, the above-mentioned starting current item sets a starting reference value that is higher than the rated current of the device, and if the current value of the peak section in the current waveform of the device is less than the starting reference value, it is detected as a stable state, and if the current value of the peak section exceeds the starting reference value, it is detected as an unstable state, and the health of the device is judged, but if the device is in a stable state, a health value of 1 is given, and if the device is in an unstable state, a health value of less than 1 is given. The above-mentioned constant-speed current item sets a constant-speed reference value that is smaller than the rated current of the device, and if the current value of the constant-speed section in the current waveform of the device is less than the constant-speed reference value, it is detected as a stable state, and if the current value of the constant-speed section exceeds the constant-speed reference value, it is detected as an unstable state, and the health of the device is judged, but if the device is in a stable state, a health value of 1 is given, and if the device is in an unstable state, a health value of less than 1 is given. The above-mentioned load time item sets the device to be turned on if the sum of the time during which the current value of the peak section in the current waveform of the device exceeds the starting reference value and the time during which the current value of the constant-speed section exceeds the constant-speed reference value is less than the load reference time. If the device is detected as being in a stable state and the load reference time is exceeded, the device is detected as being in an unstable state. If the device is in a stable state, a health value of 1 is given, and if the device is in an unstable state, a health value less than 1 is given. This will be explained below.

[0027] The above device type classification step (S20) is a step for classifying the device into a single-drive type and a continuous-drive type based on the device's operating pattern.

[0028] Here, the above-mentioned single-drive type refers to a device having a pattern with a short operating time and a large number of operating times, and the above-mentioned continuous-drive type refers to a device having a pattern with a long operating time and a small number of operating times.

[0029] For example, the above-mentioned single-speed drive type device may include a device that constitutes equipment that assembles products while performing repetitive operations, and the above-mentioned continuous-drive type device may include a device such as a conveyor or pump that operates for a long time.

[0030] The above weight setting step (S30) is a step of selecting the type of device for which soundness is to be detected from among the intermittent and continuous operation types, selecting at least two items from among the starting current item, the constant current item, and the load time item based on the selected type, and setting weights for each of the selected items.

[0031] Here, since the device of the intermittent drive type has the characteristic of repeatedly performing operations in a short period of time, as shown in FIG. 3, the current waveform according to the operation is repeatedly collected in a short period of time, so the current state of the peak section where high current is consumed during operation is an important factor. Therefore, if the device is of the intermittent drive type, the starting current item that detects the health of the peak section in the current waveform is necessarily selected, and a high weight is given to it compared to other selection items. Since the device of the continuous drive type has the characteristic of continuously operating for a long time once it is operated, as shown in FIG. 4, the constant speed section of the current waveform is formed to be longer than the peak section, so the current state of the constant speed section is an important factor. Therefore, if the device is of the continuous drive type, the constant speed current item that detects the health of the constant speed section in the current waveform is necessarily selected, and it is preferable to give it a high weight to it compared to other selection items.

[0032] For example, the above weight setting step (S30) can appropriately set a weight % as a numerical value for each item selected according to the type of device for which soundness is to be detected, with respect to the total weight of 100%.

[0033] Of course, the weight of the starting current item set high in the above-mentioned single-speed drive type or the weight of the constant-speed current item set high in the above-mentioned continuous-drive type can be set to various values ​​in consideration of the environment and conditions in which the device is actually used.

[0034] The above detection step (S40) is a step for detecting the health of the device by applying the real-time current waveform measured and collected from the device performing real-time operation to each item selected in the weight setting step (S30), and then applying the weight set to each item to detect a reasonable health index of the real-time device.

[0035] That is, the above detection step (S40) detects the health value of the device for each item selected based on the real-time current waveform measured from the real-time device, then multiplies the health value of each item by the weight % set for each item to detect the health index of each item, and then adds up the health indices of each item to detect a reasonable health index.

[0036] The reasonable health index of a device is detected as follows through a method (100) for detecting a reasonable health index of a device according to an embodiment of the present invention.

[0037] [First embodiment] A reasonable health index of a device (perforator) installed in a facility line and repeatedly performing operations in a short period of time and having a rated current of 17 A is detected.

[0038] First, based on the operation pattern of the device whose health is to be detected, it is classified as an intermittent operation type or a continuous operation type. Since the device has a pattern of performing repetitive operations in a short period of time, the device is classified as an intermittent operation type.

[0039] Then, considering the environment and conditions in which the device is used and the device information corresponding to the intermittent drive type, detection items capable of detecting the health of the device are selected. Since the device corresponds to the intermittent drive type, the above-mentioned starting current item is necessarily selected, and at least one detection item is selected. For the convenience of explanation, it is assumed that both the above-mentioned constant current item and the load time item are selected.

[0040] Then, weights are given to the selected detection items. Since the device is a single-speed drive type, a high weight of 50% is set for the starting current item, and a weight of 25% is set for the constant-speed current item and the load time item, respectively.

[0041] Of course, the weight of each detection item can be set to various values ​​considering the environment and conditions in which the device is used.

[0042] Then, as shown in Fig. 5, the current value of the peak section in the real-time current waveform measured and collected from the device repeatedly operating in real time is applied to the above-mentioned starting current item, and the device's health value is continuously detected through the above-mentioned starting reference value set.

[0043] Here, the starting reference value is set to a current value corresponding to 300% of the rated current, and if the current value of the peak section is less than the starting reference value, the health value is detected as 1, and if the current value of the peak section is greater than the starting reference value, the health value is formed to be less than 1, but the health value gradually decreases in proportion to the size of the current value of the peak section exceeding the starting reference value. For example, if the current value of the peak section corresponds to 300 to 400% of the rated current, the health value is set to 0.9, if the current value of the peak section corresponds to 400 to 500% of the rated current, the health value is set to 0.8, and if the current value of the peak section exceeds 500% of the rated current, the health value is set to 0.7.

[0044] At the same time, the health value of the device is continuously detected through the constant speed reference value set by applying the current value of the constant speed section from the real-time current waveform measured and collected from the device operating in real time to the constant speed current item.

[0045] Here, the constant speed reference value is set to a current value corresponding to 60% of the rated current, and if the current value of the constant speed section is less than the constant speed reference value, the health value is detected as 1, and if the current value of the constant speed section is greater than the constant speed reference value, the health value is formed to be less than 1, and the health value gradually decreases in proportion to the size of the current value of the constant speed section exceeding the constant speed reference value. For example, if the current value of the constant speed section corresponds to 60 to 70% of the rated current, the health value is set to 0.9, if the current value of the constant speed section corresponds to 70 to 80% of the rated current, the health value is set to 0.8, if the current value of the constant speed section corresponds to 80 to 100% of the rated current, the health value is set to 0.7, and if the current value of the constant speed section exceeds 100% of the rated current, the health value is set to 0.5.

[0046] At the same time, the current waveform measured and collected from the device within the set detection time is applied to the load time item, and the health value of the device is detected through the time exceeding the set starting and constant speed reference values.

[0047] Here, the detection time is set to 24 hours, and the load reference time is set to 10% (2.4 hours) of the set detection time, and if the sum of the time during which the current value of the peak section of the real-time current waveform of the device exceeds the start reference value and the time during which the current value of the constant speed section exceeds the constant speed reference value within the set detection time of 24 hours is less than 10% of the set 24 hours, the health value is detected as 1, and if it falls between 10 and 20%, the health value is set to 0.9, if it falls between 20 and 30%, the health value is set to 0.8, and if it exceeds 30%, the health value is set to 0.6.

[0048] Of course, the settings of the above starting and constant speed reference values ​​and the load reference time for detecting the health value in the above starting current items, constant speed current items, and load time items can be set in various ways by taking into consideration the rated current of the device, usage environment, conditions, etc.

[0049] Then, as shown in FIG. 6, the health value of the startup current item detected based on the real-time current waveform measured from the real-time device is multiplied by a 50% weight set for the startup current item to detect the health index of the real-time device for the startup current item, and at the same time, the health value of the constant current item detected based on the current waveform of the real-time device is multiplied by a 25% weight set for the constant current item to detect the health index of the real-time device for the constant current item, and at the same time, the health value of the load time item detected based on the current waveform of the real-time device is multiplied by a 25% weight set for the load time item to detect the health index of the real-time device for the load time item, and then all of the health indices are added up to detect and provide a reasonable health index of the real-time device.

[0050] [Second embodiment] It detects a reasonable health index of a device (pump) that is installed in a water purification plant, operates for a long time once it is put into operation, and has a rated current of 17A.

[0051] First, based on the operating pattern of the device for which soundness is to be detected, it is classified as a single-drive type or a continuous-drive type. If the device has a pattern with a long operating time and a small number of operations, it is classified as a continuous-drive type.

[0052] Then, considering the environment and conditions in which the device is used and the device information corresponding to the continuous operation type, detection items capable of detecting the health of the device are selected. Since the device is a drive type, the constant current item is necessarily selected, and at least one detection item is selected. For the convenience of explanation, it is assumed that both the starting current item and the load time item are selected.

[0053] Then, weights are given to the selected detection items. Since the device is a continuous operation type, a high weight of 50% is set for the constant current item, and a weight of 25% is set for the starting current item and the load time item, respectively.

[0054] Of course, the weight of each detection item can be set to various values ​​considering the environment and conditions in which the device is used.

[0055] Then, as shown in Fig. 7, the current value of the constant speed section in the real-time current waveform measured and collected from the device that operates repeatedly in real time is applied to the constant speed current item to detect the health value, and at the same time, the current value of the peak section in the current waveform is applied to the starting current item to detect the health value, and at the same time, the current waveform measured and collected from the device within the set detection time is applied to the load time item to detect the health value.

[0056] Here, the various setting conditions for detecting the health value in the constant current item, starting current item, and load time item are applied in the same manner as in the [First Embodiment] described above, and therefore, a detailed description thereof will be omitted.

[0057] Then, as shown in FIG. 8, the health value of the constant current item detected based on the real-time current waveform measured from the real-time device is multiplied by a 50% weight set for the constant current item to detect the health index of the real-time device for the constant current item, and at the same time, the health value of the starting current item detected based on the current waveform of the real-time device is multiplied by a 25% weight set for the starting current item to detect the health index of the real-time device for the starting current item, and at the same time, the health value of the load time item detected based on the current waveform of the real-time device is multiplied by a 25% weight set for the load time item to detect the health index of the real-time device for the load time item, and then all of the health indices are added up to detect and provide a reasonable health index of the real-time device.

[0058] Meanwhile, the detection item classification step (S10) may further include a ground fault current item that detects a difference value between the amount of power supplied to a device performing an operation and the amount of power consumed by the device, and detects the health of the device based on the detected difference value, and a current unbalance rate item that detects an unbalance rate of current values ​​supplied to the three phases (R phase, S phase, T phase) of the device, and detects the health of the device based on the unbalance rate of the three phases.

[0059] That is, the detection item classification step (S10) further includes the ground fault current item and current unbalance rate item along with the starting current item, the constant current item, and the load time item, so that in the weight setting step (S30), various detection items are selected by considering information such as the type of the device, rated current, usage environment, and conditions, and an appropriate weight is given to the selected detection items, thereby inducing a more precise detection of a reasonable health index of the device.

[0060] For example, by considering the type of the device, rated current, usage environment and conditions, etc., all five detection items are selected, and the weight of the starting current item is set to 35%, the weight of the constant current item is set to 15%, the weight of the load time item is set to 15%, the weight of the ground fault current item is set to 20%, and the weight of the current unbalance rate item is set to 15%, thereby detecting a reasonable health index of the real-time device.

[0061] Here, the above-mentioned starting current item, the above-mentioned constant current item, and the above-mentioned load time item were set to the starting and setting reference values ​​and the load reference time as described above to detect the health dimension, and the above-mentioned ground fault current item was set to detect the health value as 1 if the difference (ground fault current) value of the amount of power supplied to the real-time device and the amount of power consumed by the device based on the rated current of 17A of the device is less than 0.1A, and if it corresponds to 0.1 to 0.29A, the health value is 0.9, if it corresponds to 0.3 to 0.49A, the health value is 0.7, and if it exceeds 0.5A, the health value is 0.5. The above-mentioned current unbalance rate item was set to detect the health value as 1 if the unbalance rate for the three-phase current value supplied to the real-time device is less than 5%, and if it corresponds to 5 to 10%, the health value is 0.9, and if it corresponds to 10 to 20%, the health value is 0. If the soundness value exceeds 0.7 or 20%, the soundness value is set to be detected as 0.5.

[0062] Of course, the various values ​​set to detect the health value in the above-mentioned starting current items, constant current items, load time items, ground fault current items, and current unbalance rate items can be set to various sizes in consideration of the rated current of the device, usage environment, conditions, etc.

[0063] Then, as shown in Fig. 9, the real-time current waveform measured and collected from the real-time operating device is applied to the starting current item, constant-speed current item, load time item, ground fault current item, and current unbalance rate item to detect the health value for each item.

[0064] As described above, based on the current waveform measured and collected from the real-time device, the health index of each item is detected by multiplying each detected health value applied to the starting current item, constant current item, load time item, ground fault current item, and current unbalance rate item by each set weighting %. As summarized in Fig. 10, the health index of the starting current item is detected by multiplying the detected health value by the set weighting of 35%, the health index of the constant current item is detected by multiplying the detected health value by the set weighting of 15%, the health index of the load time item is detected by multiplying the detected health value by the set weighting of 15%, the health index of the ground fault current item is detected by multiplying the detected health value by the set weighting of 20%, and the health index of the current unbalance rate item is detected by multiplying the detected health value by the set weighting of 15%, and then the health index of each item is detected. By adding them up, a reasonable health index of the real-time device is detected.

[0065] Here, the weights set for the starting current items, constant current items, load time items, ground fault current items, and current unbalance rate items can be freely set for each item by considering the type of equipment, the environment in which the equipment is used, conditions, etc., so that a reasonable health index of the equipment can be precisely detected.

[0066] Meanwhile, the device type classification step (S20) may further include an irregular operation type that distinguishes devices having an irregular pattern of operation time or number of operations.

[0067] If the type of device for which soundness is to be detected corresponds to the irregular operation type, the detection items for which soundness is to be detected are selected from the starting current item, the constant current item, and the load time item by collecting and considering information such as the pattern, time, environment, and conditions under which the device actually operates in the field, and then the weights for the selected detection items are appropriately (freely) set so that the soundness index for devices that operate somewhat irregularly can also be reasonably detected.

[0068] Here, the irregularly driven device may be a device such as an elevator.

[0069] The method (100) for detecting a reasonable health index of a device of the present invention, which is composed of the steps described above, divides the device into a discontinuous operation type and a continuous operation type according to the operation pattern of the device, selects a detection item that can effectively detect the health of the device according to the type of the device whose health is to be detected, and then sets a weight appropriate to the selected item, and applies the weight set to each item to the health value of the detection item detected based on the current waveform of the device in real time, thereby compensating for the type of the device according to various operation patterns, thereby having the effect of detecting a very reasonable health index of the device.

[0070] In addition, in order to detect the health of the device, various detection items such as starting current items, constant current items, load time items, ground fault current items, and current unbalance rate items are presented, and the health of the device in real time is detected based on the weights assigned to each of the presented items according to the type of device, thereby securing excellent reliability for the reasonable health index of the detected device.

[0071] While the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, these are merely illustrative and are not limited to the above-described embodiments. Those skilled in the art will readily appreciate that various modifications and equivalent embodiments are possible. Furthermore, it should be understood that modifications are possible by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the claims in the present invention is not limited to the detailed description, but rather by the claims set forth below and their technical spirit.

[0072] The present invention can be used in the device health industry.

Claims

1. A detection item classification step in which the health of a device is detected based on a current state in a peak section where the current size is formed as a maximum (peak) in a current waveform constructed by collecting information on changes in the size of current consumed over time in a device driven to perform an operation, a constant current item in which the health of a device is detected based on a current state in a constant section where the current size in the current waveform is continuously maintained within a certain range, and a load time item in which the health of a device is detected based on the time during which a current waveform measured and collected from the device within a set detection time exceeds a set reference value; A device type classification step that classifies the device into a single-action type and a continuous-action type based on the device's operating pattern; A weight setting step for selecting the type of device to be detected for soundness from among the intermittent and continuous operation types, selecting at least two items from among the starting current items, constant current items, and load time items based on the selected type, and setting weights for each of the selected items; and A method for detecting a reasonable health index of a device, characterized by including a detection step of detecting a reasonable health index of a device in real time by applying a real-time current waveform measured and collected from a device performing real-time operation to each item selected in the weight setting step (S30) to detect the health of the device, and then applying the set weight to each item.

2. In paragraph 1, A method for detecting a reasonable health index of a device, characterized in that, in the above device type classification step, a device type having a pattern with a short operation time and a large number of operations is classified as an intermittent operation type, and a device type having a pattern with a long operation time and a small number of operations is classified as a continuous operation type.

3. In paragraph 2, In the above weight setting step, if the device is a single-speed drive type, the starting current item is necessarily selected and the weight is set higher compared to other items. A method for detecting a reasonable health index of a device, characterized in that if the device is a continuous-drive type, the constant-speed current item is necessarily selected and its weight is set higher than that of other items.

4. In paragraph 1, The above starting current item sets the starting reference value by considering the rated current of the device, and detects the health of the device by comparing the current value of the peak section of the current waveform of the device with the starting reference value. The above constant current item sets a constant speed reference value by considering the rated current of the device, and detects the health of the device by comparing the current value of the constant speed section with the constant speed reference value in the current waveform of the device. The above load time item is a reasonable health index detection method for a device, characterized in that it detects the health of the device based on the time during which the current value of the peak section of the current waveform of the device exceeds the starting reference value within the set detection time and the time during which the current value of the constant speed section exceeds the constant speed reference value.

5. In paragraph 4, The above starting current item sets a starting reference value that is higher than the rated current of the device, and if the current value of the peak section of the current waveform of the device is lower than the starting reference value, it is detected as a stable state, and if the current value of the peak section exceeds the starting reference value, it is detected as an unstable state to determine the health of the device. If the device is in a stable state, it is given a health value of 1, and if the device is in an unstable state, it is given a health value of less than 1. The above constant current item sets a constant speed reference value that is smaller than the rated current of the device, and if the current value of the constant speed section in the current waveform of the device is less than the constant speed reference value, it is detected as a stable state, and if the current value of the constant speed section exceeds the constant speed reference value, it is detected as an unstable state to determine the health of the device. If the device is in a stable state, it is given a health value of 1, and if the device is in an unstable state, it is given a health value of less than 1. The above load time item detects the device as stable if the sum of the time during which the current value of the peak section of the device's current waveform exceeds the startup reference value and the time during which the current value of the constant speed section exceeds the constant speed reference value is less than the load reference time within the set detection time, and detects the device as unstable if it exceeds the load reference time. If the device is stable, a health value of 1 is given, and if the device is unstable, a health value of less than 1 is given. The above weight setting step is for 100% of the total weight. Set a weight % for each item selected based on the type of device you want to detect health for. The above detection step is a method for detecting a reasonable health index of a device, characterized in that the detection step detects a health value of the device for each item selected based on a real-time current waveform measured from a real-time device, then multiplies the health value of each item by a weight % set for each item to detect a health index of each item, and then adds up the health indices of each item to detect a reasonable health index.

6. In paragraph 1, A method for detecting a reasonable health index of a device, characterized in that the above detection item classification step further includes a ground fault current item for detecting a difference value between the amount of power supplied to a device performing an operation and the amount of power consumed by the device, and detecting the health of the device based on the detected difference value, and a current unbalance rate item for detecting an unbalance rate of current values ​​supplied to three phases (R phase, S phase, T phase) of the device, and detecting the health of the device based on the unbalance rate of the three phases.

7. In paragraph 1, A method for detecting a reasonable health index of a device, characterized in that the above device type classification step further includes an irregular operation type for distinguishing devices having an irregular pattern of operation time or number of operations.

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