A motor parameter processing platform and method for road-mixed lime soil production

Abstract

A motor parameter processing platform and method for road-mixed soil production belong to the field of electrical digital data processing technology. By removing singular speed values ​​and singular current values ​​from motor parameters used for road-mixed soil production, improving the method for selecting subqueue lengths and obtaining current outlier measurements, the present invention can more accurately grasp the dynamic changes in speed values ​​and current values, reduce the probability of misjudging motor damage conditions, and effectively improve the sensitivity of estimating current outlier conditions based on the current outlier measurement value of the optimal subqueue, thereby preventing further deterioration of motor damage caused by current outlier conditions. In short, the motor parameter processing platform for road-mixed soil production can effectively improve the accuracy of current outlier estimation through accurate subqueue analysis and outlier estimation, and can further enhance the stability and confidence of motor operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric digital data processing, and in particular relates to a motor parameter processing platform and method for road-mixed lime soil production. Background Art

[0002] During the regeneration production of road-mixed lime soil, that is, lime-stabilized soil, it is often mentioned in the existing technical solution with patent publication number "CN215540154U", which includes an electric motor connected to the main shaft, and the motor is used to drive the main shaft to pull the mixing mechanism to stir the lime-stabilized soil, thereby achieving the regeneration production of the lime-stabilized soil.

[0003] During the regeneration production of lime-stabilized soil, the operating health of the motor is of vital importance, so the operating health of the motor must be measured. The current method for measuring the operating health of the motor is often: timely obtain the motor operating parameters and form a motor current parameter library, the motor operating parameters include the measurement time point, the current current value and the current speed value (the speed value of the main shaft) adapted to the current current value; based on the measured current value, obtain the measured speed value adapted to the measured current value from the motor current parameter library; determine the current current value cluster adapted to the measured speed value in the motor current parameter library, and the value obtained by subtracting the current speed corresponding to the current current value in the current current value cluster from the measured speed value meets the defined temperature critical value; calculate the damage measurement ratio, and when the damage measurement ratio is higher than the defined critical value, it is determined that the motor is in a motor damage state.

[0004] At the site where the motor drives the main shaft to pull the mixing mechanism to mix lime-stabilized soil, outliers in current and speed are often generated due to factors such as air pressure and climate. In addition, the changes in speed and current are different at different times or in different climates. The above method for measuring the health status of the motor is only suitable for the current value cluster that matches the measured speed value, which often makes the identification of current outliers inaccurate. Summary of the Invention

[0005] In order to solve the defects in the existing technology, the present invention proposes a motor parameter processing platform and method for road-mixed soil production, which effectively avoids the defects of the existing method for measuring the operating health status of the motor used for road-mixed soil, which only adapts the current current value cluster adapted to the measured speed value and the inaccurate identification of current outliers.

[0006] The present invention utilizes the following technical solutions.

[0007] A method for processing motor parameters for road-mixed lime soil production, comprising:

[0008] The motor drives the main shaft to pull the mixing mechanism to mix the road-mixed lime and soil;

[0009] During the period when the motor drives the main shaft to pull the mixing mechanism to mix the road-mixed soil, the motor parameter processing method for road-mixed soil production also includes:

[0010] Step 1: Receive the speed queue, current queue and torque queue;

[0011] Step 2: Remove the singular speed values ​​and current values ​​in the speed queue and current queue to form a new speed queue and current queue;

[0012] Step 3: Calculate the optimal subqueue length based on the new speed queue, and cut the last subqueue in the new current queue as the optimal subqueue based on the optimal subqueue length;

[0013] Step 4: Calculate the current outlier metric value for the optimal sub-queue. When the current outlier metric value is higher than a critical value, it is determined that the current has an outlier condition and the motor is deemed to be damaged.

[0014] Preferably, in step 1, the speed queue is a queue formed by arranging the speed values ​​transmitted by the speed sensor to the industrial computer in the order of their measurement points, the current queue is a queue formed by arranging the current values ​​transmitted by the current sensor to the industrial computer in the order of their measurement points, and the torque queue is a queue formed by arranging the torque values ​​transmitted by the torque sensor to the industrial computer in the order of their measurement points.

[0015] Preferably, in step 2, the method for removing the singular speed values ​​and the singular current values ​​in the speed queue and the current queue includes: defining the sub-queue length , use the forward shift method to cut the sub-queues of the torque queue and calculate the removal factor of each sub-queue , when the removal factor is higher than the critical value, the The corresponding speed and current values ​​of each sub-queue, , here, Representatives obtained The highest value within Represents the defined subqueue length, Representative The first torque, Representative The average torque in each sub-queue.

[0016] Preferably, in step 2, the method of using the forward shift method to split the sub-queues of the torque queue includes: starting from the first torque value of the torque queue, taking each torque value of the torque queue from front to back as the initial torque value, and comparing the initial torque value with the adjacent torque values ​​thereafter. The torque values ​​are treated as a sub-queue until the sub-queue contains the last torque value of the torque queue.

[0017] Preferably, in step 2, The speed and current values ​​corresponding to each sub-queue are The speed value and current value measured during the torque value measurement period corresponding to each sub-queue are obtained.

[0018] Preferably, in step 2, the critical value is 10%.

[0019] Preferably, in step 3, the method for calculating the optimal sub-queue length according to the new speed queue includes: calculating the sub-queue cutting factor corresponding to different sub-queue lengths , here, is the subqueue length, , is the number of elements in the new speed queue, is the starting sequence number of the subqueue, is the termination sequence number of the subqueue, Is a subqueue The corresponding speed stabilization parameter; construct a cutting factor queue based on the subqueue cutting factors corresponding to different subqueue lengths, and obtain the first subqueue cutting factor of the cutting factor queue that is smaller than the cutting factors of the adjacent subqueues on its left and right sides. The subqueue length corresponding to the obtained subqueue cutting factor is the optimal subqueue length.

[0020] Preferably, in step 3, is the variance of queue 1, queue 1 through sub-queues The ratio is formed by dividing the speed value corresponding to each serial number by the speed value corresponding to the previous serial number.

[0021] Preferably, in step 4, the method for calculating the current outlier metric value for the optimal sub-queue includes: calculating the current value corresponding to each sequence number in the optimal sub-queue and dividing it by the current value corresponding to the previous sequence number to obtain a current ratio, and the entire current ratio constitutes queue 2; using the maximum inter-class variance method to perform segmentation on queue 2, obtaining the first segment and the second segment after segmentation, respectively obtaining the mean of the first segment and the second segment, and accordingly obtaining the first mean and the second mean, respectively, and dividing the absolute value of the value obtained by subtracting the second mean from the first mean by the first mean by the ratio obtained by the first mean as the current outlier metric value.

[0022] A motor parameter processing platform for road-mix lime soil production, comprising:

[0023] The motor, current sensor, torque sensor, speed sensor and industrial computer are connected to the main shaft, and the current sensor, torque sensor and speed sensor are connected to the industrial computer;

[0024] The motor is used to drive the main shaft to pull the mixing mechanism to mix the road mix lime soil. The current sensor, torque sensor and speed sensor are used to measure the current value of the motor, the torque value of the main shaft and the speed value of the main shaft respectively, and transmit the current value of the motor, the torque value of the main shaft and the speed value of the main shaft to the industrial computer;

[0025] The units running on the industrial computer include:

[0026] Receiving unit, removing unit, segmenting unit and estimating unit;

[0027] A receiving unit, used for receiving a speed queue, a current queue and a torque queue;

[0028] a removal unit, configured to remove the singular speed values ​​and the singular current values ​​in the speed queue and the current queue to form a new speed queue and current queue;

[0029] A splitting unit is used to calculate the optimal sub-queue length according to the new speed queue, and to cut the last sub-queue in the new current queue as the optimal sub-queue according to the optimal sub-queue length;

[0030] The estimation unit is used to calculate the current outlier metric value for the optimal sub-queue, and when the current outlier metric value is higher than a critical value, it is determined that the current has an outlier condition and the motor is deemed to be damaged.

[0031] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0032] By removing singular speed values ​​and singular current values, improving the method for selecting sub-queue lengths and obtaining current outlier measurements, the present invention can more accurately grasp the dynamic changes in speed values ​​and current values, reduce the probability of misjudging the motor damage condition, and based on the analysis method of the current outlier measurement value of the optimal sub-queue, can effectively improve the sensitivity of estimating the current outlier condition, and prevent further deterioration of the motor damage caused by the current outlier condition. In short, the motor parameter processing platform for road-mixed lime soil production can effectively improve the accuracy of the current outlier condition estimation through accurate sub-queue analysis and outlier condition estimation, and can further enhance the stability and confidence of the motor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flow chart of the motor parameter processing method for road-mixed lime soil production described in the present invention;

[0034] Figure 2 It is a partial structural diagram of the motor parameter processing platform for road-mixed lime soil production described in the present invention. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely express the technical solutions of the present invention. The embodiments expressed in this application are only some embodiments of the present invention, not all embodiments. Based on the spirit of the present invention, other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0036] like Figure 1 As shown, the method for processing motor parameters for road-mixed lime soil production according to the present invention includes:

[0037] The motor drives the main shaft to pull the mixing mechanism to mix the road-mixed lime soil; the road-mixed lime soil is lime-stabilized soil.

[0038] During the period when the motor drives the main shaft to pull the mixing mechanism to mix the road-mixed soil, the motor parameter processing method for road-mixed soil production also includes:

[0039] Step 1: Receive the speed queue, current queue and torque queue;

[0040] In a preferred but non-restrictive embodiment of the present invention, in step 1, during the period when the motor drives the main shaft to pull the mixing mechanism to mix the road-mixed ash soil, the current will reflect the smoothness of the motor operation, so the current queue must be received in this application, and because the speed and torque are correspondingly related to the current, the speed queue and the torque queue must also be received. The speed queue is a queue formed by arranging the speed values ​​transmitted by the speed sensor to the industrial computer in the order of their measurement points, the current queue is a queue formed by arranging the current values ​​transmitted by the current sensor to the industrial computer in the order of their measurement points, and the torque queue is a queue formed by arranging the torque values ​​transmitted by the torque sensor to the industrial computer in the order of their measurement points.

[0041] Because the speed, current, and torque values ​​of previous points in time are used in this platform, the hard disk of the industrial computer is often used to store the speed, current, and torque values.

[0042] Step 2: Remove the singular speed values ​​and current values ​​in the speed queue and current queue to form a new speed queue and current queue;

[0043] The torque queue can often reflect the eccentric rotation condition generated during the occasional spindle jitter. If eccentric rotation occurs, the amplitude of current variation will increase and the frequency of variation will also increase. The current value under this condition is a singular current value with low confidence, so it is necessary to remove the singular current value under the eccentric rotation condition generated during the occasional spindle jitter. The speed value and the current value are strongly correlated. The change of the speed value often affects the current value, so the singular speed value under the eccentric rotation condition generated during the occasional spindle jitter must also be synchronously removed.

[0044] In a preferred but non-limiting embodiment of the present invention, in step 2, the method for removing the singular speed values ​​and the singular current values ​​in the speed queue and the current queue includes: defining the sub-queue length (The subqueue length is the number of elements in the subqueue), the torque queue is cut into subqueues using the forward shift method, and the removal factor of each subqueue is calculated. , when the removal factor is higher than the critical value, the The corresponding speed and current values ​​of each sub-queue, , here, Representatives obtained The highest value within Represents the defined subqueue length, Representative The first torque, Representative The average torque in each sub-queue.

[0045] In a preferred but non-limiting embodiment of the present invention, in step 2, the method of using the forward shift method to split the sub-queues of the torque queue includes: starting from the first torque value of the torque queue, taking each torque value of the torque queue from front to back as the initial torque value, and comparing the initial torque value with the adjacent torque values ​​thereafter. The torque values ​​are treated as a sub-queue until the sub-queue contains the last torque value of the torque queue.

[0046] In a preferred but non-limiting embodiment of the present invention, in step 2, The speed and current values ​​corresponding to each sub-queue are The speed value and current value measured during the torque value measurement period corresponding to each sub-queue are obtained.

[0047] In a preferred but non-limiting embodiment of the present invention, in step 2, the critical value is 10%. The critical value can also be determined according to specific requirements.

[0048] Just as the industrial computer receives the speed value, current value and torque value transmitted for a set period of time to form a speed queue, a current queue and a torque queue respectively, which are: 、 and , the sub-queue length is defined as three, then the torque queue can be divided into four sub-queues using the forward shift method: 、 、 、 , obtained by operation 、 and Below the critical value, The speed and current values ​​in the second sub-queue are removed because they are higher than the critical value. and , in the current queue and , and then the new speed queue is , the new current queue is .

[0049] Step 3: Calculate the optimal subqueue length based on the new speed queue, and cut the last subqueue in the new current queue as the optimal subqueue based on the optimal subqueue length;

[0050] There is a strong correlation between the speed value and the current value. Changes in speed often affect the current. Just as, when the speed changes smoothly, the current changes smoothly under normal circumstances. When the speed changes unsteadily, the current changes unsteadily. Therefore, when the speed changes unsteadily, the actual current condition cannot be analyzed. Therefore, by analyzing the changes in the speed queue, the length of the sub-queue with the corresponding stable speed change is found, and the last sub-queue in the new current queue is cut with this sub-queue length as the optimal sub-queue. The current in the optimal sub-queue has the highest confidence and best reflects the actual current condition. If the current changes smoothly in the optimal sub-queue, the current is reasonable. If the current changes unsteadily in the optimal sub-queue, the current is outlier.

[0051] In a preferred but non-limiting embodiment of the present invention, in step 3, the method for calculating the optimal sub-queue length according to the new speed queue includes: calculating the sub-queue cutting factor corresponding to different sub-queue lengths , here, is the subqueue length (length is the number of elements), , is the number of elements in the new speed queue, Is the starting sequence number of the subqueue (the starting sequence number is the sequence number of the first element of the subqueue, which is the sequence number of the element in the new speed queue. The sequence number of the new speed queue is the code configured for the elements of each new speed queue from the beginning to the end. is the termination sequence number of the subqueue (the termination sequence number is the sequence number of the last element of the subqueue, which is the sequence number of the element in the new speed queue), Is a subqueue The corresponding speed stabilization parameter; construct a cutting factor queue based on the subqueue cutting factors corresponding to different subqueue lengths, and obtain the first subqueue cutting factor of the cutting factor queue that is smaller than the cutting factors of the adjacent subqueues on its left and right sides. The subqueue length corresponding to the obtained subqueue cutting factor is the optimal subqueue length.

[0052] In a preferred but non-limiting embodiment of the present invention, in step 3, specifically select Is a subqueue The variance of the corresponding speed stability parameter of queue 1, queue 1 through sub-queue The speed value corresponding to each sequence number in the subqueue is divided by the speed value corresponding to the previous sequence number. There is no speed value corresponding to the sequence number before the first speed value, so the subqueue can be used In addition, the speed value corresponding to the previous sequence number closest to the first speed value is used to calculate the corresponding speed ratio, just like the sub-queue The speed value of the speed queue corresponding to the sequence number is , subqueue In addition, the speed value corresponding to the nearest previous serial number is , then queue 1 is .

[0053] Just as, there are eight speed values ​​in the new speed queue, , for each subqueue length, there is a corresponding subqueue cut factor. All subqueue cut factors form a subqueue cut factor queue. Get the first subqueue cut factor in the cut factor queue that is smaller than the cut factors of the two adjacent subqueues on its left and right sides. The subqueue length corresponding to the obtained subqueue cut factor The optimal subqueue length is the subqueue whose subqueue length is the optimal subqueue length. The last element of the subqueue is the subqueue composed of the last current value in the new current queue, that is, the last current value in the new current queue and its previous adjacent current value. The current values ​​constitute the optimal sub-queue.

[0054] Step 4: Calculate the current outlier metric value for the optimal sub-queue. When the current outlier metric value is higher than a critical value, it is determined that the current has an outlier condition and the motor is deemed to be damaged.

[0055] In a preferred but non-limiting embodiment of the present invention, in step 4, the method for calculating the current outlier metric value for the optimal sub-queue includes: calculating the current value corresponding to each sequence number in the optimal sub-queue and dividing it by the current value corresponding to the previous sequence number to obtain a current ratio, and the entire current ratio constitutes queue 2; using the maximum inter-class variance method to perform segmentation on queue 2, obtaining the first segment and the last segment after segmentation, and obtaining the means of the first segment and the last segment respectively, thereby obtaining the first mean and the last mean respectively, and dividing the absolute value of the value obtained by subtracting the last mean from the first mean by the first mean to obtain a ratio obtained by the first mean as the current outlier metric value.

[0056] Since there is no current value corresponding to the previous sequence number of the first current value in the optimal sub-queue, the current value corresponding to the previous sequence number closest to the first current value outside the optimal sub-queue can be used to calculate the corresponding current ratio, just as the new current queue is , the optimal subqueue is , then queue 2 is , use the maximum inter-class variance method to perform operations on queue 2 and obtain a critical value , the current ratio in queue 2 is lower than the critical value The current ratio of the first segment constitutes the first segment, the mean of the current ratio of the first segment is the first mean, and the current ratio in queue 2 is higher than the critical value The current ratio of the latter section is the mean of the current ratio of the latter section. , the mean of the current ratio in the previous section is the mean of the previous Current outlier metrics , in the current outlier metric value When the current exceeds a critical value, it is determined that the current has an outlier condition. The critical value can be 10%, and the critical value can also be determined according to specific requirements.

[0057] like Figure 2 As shown, the motor parameter processing platform for road-mixed lime soil production according to the present invention includes:

[0058] The motor, current sensor, torque sensor, speed sensor and industrial computer are connected to the main shaft, and the current sensor, torque sensor and speed sensor are connected to the industrial computer;

[0059] The motor drives the main shaft, which pulls the mixing mechanism to stir the road-mixed soil, thereby achieving the regeneration of the road-mixed soil. The current sensor, torque sensor, and speed sensor measure the motor's current, main shaft torque, and speed, respectively, and transmit these values ​​to the industrial computer. These motor parameters are represented by the motor current, torque, and speed, while the motor current represents the motor's output current. The initial measurement time of the current sensor, torque sensor, and speed sensor coincides with the measurement frequency, which is the sampling frequency.

[0060] The units running on the industrial computer include:

[0061] Receiving unit, removing unit, segmenting unit and estimating unit;

[0062] A receiving unit, used for receiving a speed queue, a current queue and a torque queue;

[0063] a removal unit, which is in communication with the receiving unit and is used to remove the singular speed values ​​and the singular current values ​​in the speed queue and the current queue to form a new speed queue and current queue;

[0064] The splitting unit is connected to the removal unit and is used to calculate the optimal sub-queue length according to the new speed queue, and to cut the last sub-queue in the new current queue as the optimal sub-queue according to the optimal sub-queue length;

[0065] The estimation unit is in communication with the segmentation unit and is used to calculate the current outlier metric value for the optimal sub-queue. When the current outlier metric value is higher than a critical value, it is determined that the current has an outlier condition and the motor is deemed to be damaged.

[0066] When it is estimated that the current is abnormal, the industrial computer prompts a message on its display screen that the motor is damaged, thereby notifying maintenance personnel to perform maintenance on the motor.

[0067] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0068] By removing singular speed values ​​and singular current values, improving the method for selecting sub-queue lengths and obtaining current outlier measurements, the present invention can more accurately grasp the dynamic changes in speed values ​​and current values, reduce the probability of misjudging the motor damage condition, and based on the analysis method of the current outlier measurement value of the optimal sub-queue, can effectively improve the sensitivity of estimating the current outlier condition, and prevent further deterioration of the motor damage caused by the current outlier condition. In short, the motor parameter processing platform for road-mixed lime soil production can effectively improve the accuracy of the current outlier condition estimation through accurate sub-queue analysis and outlier condition estimation, and can further enhance the stability and confidence of the motor operation.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not deviate from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for processing motor parameters for road-mixed lime soil production, characterized in that: include: The motor drives the main shaft to pull the mixing mechanism to mix the road-mixed lime and soil; During the period when the motor drives the main shaft to pull the mixing mechanism to mix the road-mixed soil, the motor parameter processing method for road-mixed soil production also includes: Step 1: Receive the speed queue, current queue and torque queue; Step 2: Remove the singular speed values ​​and current values ​​in the speed queue and current queue to form a new speed queue and current queue; Step 3: Calculate the optimal subqueue length based on the new speed queue, and cut the last subqueue in the new current queue as the optimal subqueue based on the optimal subqueue length; Step 4: Calculate the current outlier metric value for the optimal sub-queue. When the current outlier metric value is higher than the critical value, it is confirmed that the current has an outlier condition and the motor is deemed to be damaged. In step 3, the method for calculating the optimal sub-queue length according to the new speed queue includes: calculating the sub-queue cutting factor corresponding to different sub-queue lengths , here, is the subqueue length, , is the number of elements in the new speed queue, is the starting sequence number of the subqueue, is the termination sequence number of the subqueue, Is a subqueue The corresponding speed stabilization parameter; construct a cutting factor queue based on the subqueue cutting factors corresponding to different subqueue lengths, and obtain the first subqueue cutting factor of the cutting factor queue that is smaller than the cutting factors of the adjacent subqueues on its left and right sides. The subqueue length corresponding to the obtained subqueue cutting factor is the optimal subqueue length.

2. The motor parameter processing method for road-mixed lime soil production according to claim 1, characterized in that: In step 1, the speed queue is a queue formed by arranging the speed values ​​transmitted from the speed sensor to the industrial computer in the order of their measurement time points, the current queue is a queue formed by arranging the current values ​​transmitted from the current sensor to the industrial computer in the order of their measurement time points, and the torque queue is a queue formed by arranging the torque values ​​transmitted from the torque sensor to the industrial computer in the order of their measurement time points.

3. The motor parameter processing method for road-mixed lime soil production according to claim 2, characterized in that: In step 2, the method of removing the singular speed values ​​and the singular current values ​​in the speed queue and the current queue includes: defining the sub-queue length , use the forward shift method to cut the sub-queues of the torque queue and calculate the removal factor of each sub-queue , when the removal factor is higher than the critical value, the The corresponding speed and current values ​​of each sub-queue, , here, Representatives obtained The highest value within Represents the defined subqueue length, Representative The first torque, Representative The average torque in each sub-queue.

4. The motor parameter processing method for road-mixed lime soil production according to claim 3, characterized in that: In step 2, the method of using the forward shift method to split the torque queue into sub-queues includes: starting from the first torque value of the torque queue, taking each torque value of the torque queue from front to back as the initial torque value, and taking the initial torque value and the adjacent torque value as the initial torque value. The torque values ​​are treated as a sub-queue until the sub-queue contains the last torque value of the torque queue.

5. The motor parameter processing method for road-mixed lime soil production according to claim 4, characterized in that: In step 2, The speed and current values ​​corresponding to each sub-queue are The speed value and current value measured during the torque value measurement period corresponding to each sub-queue are obtained.

6. The motor parameter processing method for road-mixed lime soil production according to claim 5, characterized in that: In step 2, the critical value is 10%.

7. The motor parameter processing method for road-mixed lime soil production according to claim 6, characterized in that: In step 3, is the variance of queue 1, queue 1 through sub-queues The ratio is formed by dividing the speed value corresponding to each serial number by the speed value corresponding to the previous serial number.

8. The motor parameter processing method for road-mixed lime soil production according to claim 7, characterized in that: In step 4, the method for calculating the current outlier metric value for the optimal subqueue includes: calculating the current value corresponding to each sequence number in the optimal subqueue and dividing it by the current value corresponding to the previous sequence number to obtain a current ratio, and the total current ratio constitutes queue 2; using the maximum inter-class variance method to perform segmentation on queue 2, obtaining the first segment and the second segment after the segmentation, obtaining the means of the first segment and the second segment respectively, and thereby obtaining the first mean and the second mean respectively, and dividing the absolute value of the value obtained by subtracting the second mean from the first mean by the first mean by the ratio obtained by the first mean as the current outlier metric value.

Images