Automatic parameter compensation device of intelligent fusion terminal and concentrator

Abstract

The invention discloses an automatic parameter compensation device for an intelligent fusion terminal and a concentrator. The automatic parameter compensation device comprises an aging prediction model training module used for generating a communication unit aging prediction model; the current data acquisition module is used for acquiring current data of the communication unit; the aging coefficient obtaining module is used for obtaining a first aging coefficient of the communication unit according to the current data; the input module is used for inputting current data into a communication unit aging prediction model to obtain initial aging degree data; the aging degree obtaining module is used for obtaining actual aging degree data according to the first aging coefficient and the initial aging degree data; and the automatic compensation module is used for controlling the low-noise amplifier and the band-pass filter to perform corresponding compensation according to the actual aging degree data. According to the invention, parameter compensation can be carried out on signal decline and bit error rate increase caused by aging of the communication unit, and the accuracy and reliability of data transmission are improved.

Description

Technical Field

[0001] The present invention relates to the field of electric power equipment, and in particular to an automatic parameter compensation device for an intelligent fusion terminal and a concentrator. Background Art

[0002] Smart fusion terminals (SFTs) and concentrators play different but complementary roles in the power system. Together, they form an "edge-convergence" collaborative architecture to support intelligent management of distribution networks and efficient data transmission. Smart fusion terminals are usually deployed on the user side or distribution transformer side. As edge computing devices, they integrate functions such as data acquisition, local control, and communication. For example, they are used in scenarios such as low-voltage distribution monitoring, distributed energy access (such as photovoltaics), and demand response. Concentrators are middle-layer devices on the distribution side or master station side, responsible for aggregating data from multiple SFTs or smart meters and uploading them to the master station system through remote communications (such as optical fiber, 4G / 5G). Concentrators are usually installed near distribution rooms, substations, or substations.

[0003] However, during the use of concentrators and intelligent fusion terminals, the problem of communication unit aging will occur. The aging of communication units will have a significant impact on the operating stability, data reliability and system efficiency of concentrators and intelligent fusion terminal equipment. The most important impacts include signal strength degradation and increased bit error rate (BER) during data transmission. Among them, signal strength degradation reduces the signal-to-noise ratio, greatly reducing the reliability of data transmission; increased bit error rate leads to frequent retransmissions, increased communication delays, and affected real-time performance (such as remote meter reading data delays for power concentrators). Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an automatic parameter compensation device for an intelligent fusion terminal and a concentrator, aiming to perform parameter compensation for signal degradation and increased bit error rate caused by aging of communication units, thereby improving the accuracy and reliability of power data transmission.

[0005] To achieve the above-mentioned purpose, the present invention provides an automatic parameter compensation device for an intelligent fusion terminal and a concentrator, which is used to perform parameter compensation on a communication unit of the intelligent fusion terminal and the concentrator, wherein the communication unit is connected to a low noise amplifier and a bandpass filter respectively, and the automatic parameter compensation device module comprises: an aging prediction model training module, a current data acquisition module, an aging coefficient acquisition module, an aging degree acquisition module, and an automatic compensation module; The aging prediction model training module is used to obtain first training data corresponding to the communication unit, and input the training data into the first training model for training to obtain the communication unit aging prediction model; wherein the first training data includes environmental data and usage time data as features and aging degree data as labels, the aging degree data includes signal decay degree and bit error rate, and the training data are all data collected under a standard communication load rate, and the communication load rate is the communication volume per unit time; The current data acquisition module is used to obtain the first environment data, the first usage duration data and the total communication data of the communication unit to be compensated; and obtain the current communication load rate of the communication unit according to the first usage duration data and the total communication data; The aging coefficient obtaining module obtains a first aging coefficient of the communication unit according to the current communication load rate; wherein the aging coefficient of the communication unit is positively correlated with the communication load rate, and the greater the communication load rate, the greater the aging coefficient; The aging degree acquisition module inputs the first environment data and the first usage time data into the communication unit aging prediction model to obtain initial aging degree data of the communication unit; obtains actual aging degree data according to the initial aging degree data and the first aging coefficient; wherein the actual aging degree data includes actual signal decay degree and actual bit error rate; The automatic compensation module is used to control the amplification factor of the low-noise amplifier to compensate for the signal attenuation of the communication unit according to the actual signal attenuation degree; and to control the passband range of the bandpass filter to compensate for the bit error rate of the communication unit according to the actual bit error rate; wherein the bit error rate of the communication unit is caused by external signal interference and is affected by the distorted signal generated by aging of the communication unit.

[0006] Optionally, the aging coefficient acquisition module includes: an aging coefficient function acquisition submodule and an aging coefficient acquisition submodule; The aging coefficient function acquisition submodule is used to compare the aging speed of the communication unit corresponding to different communication load rates under the same other conditions to obtain an aging coefficient function; wherein the aging coefficient function is a function in which the aging coefficient changes with the change of the communication load rate, and the aging coefficient corresponding to the standard communication load rate is specified to be 1; The aging coefficient obtaining submodule is used to query the aging coefficient function according to the current communication load rate to obtain the first aging coefficient.

[0007] Optionally, the current data acquisition module is specifically used for: The first environment data, the first usage duration data, and the total communication volume data of the communication unit to be compensated are obtained; and the total communication volume data is divided by the first usage duration data to obtain the current communication load rate.

[0008] Optionally, the environmental data includes at least one of temperature, humidity, PM value and electromagnetic interference.

[0009] Optionally, the aging degree obtaining module is specifically used for: The first environmental data and the first usage time data are input into the communication unit aging prediction model to obtain the initial signal degradation degree and the initial bit error rate of the communication unit; the initial signal degradation degree and the initial bit error rate are multiplied by the first aging coefficient respectively to obtain the actual signal degradation degree and the actual bit error rate.

[0010] Optionally, the automatic compensation module is specifically used for: According to the actual signal attenuation degree and the standard signal strength, a required first compensation magnification is obtained; according to the first compensation magnification, the amplification magnification of the low noise amplifier is controlled to compensate for the signal attenuation of the communication unit; wherein the standard signal strength is the signal strength of the communication unit before aging, and the more the noise amplifier compensates, the more energy it consumes; According to the actual bit error rate, the required first passband range compensation is obtained; according to the first passband range compensation, the passband range of the bandpass filter is controlled to compensate for the bit error rate of the communication unit; wherein, the narrower the passband range, the more external signals can be filtered, the lower the bit error rate, and the more energy is consumed.

[0011] Optionally, the automatic parameter compensation device further includes: a communication unit replacement reminder module; The communication unit replacement reminder module is used to issue a reminder to replace the communication unit in response to the actual aging degree data being greater than or equal to the extreme aging standard data; wherein at least one of the signal degradation degree and the bit error rate corresponding to the extreme aging standard data is greater than a compensation threshold.

[0012] Optionally, the automatic parameter compensation device further comprises: a device difference compensation unit; The device difference compensation unit is used to obtain a difference compensation coefficient according to the loop characteristics of the communication unit; wherein the loop characteristics of the communication unit are related to the aging speed of the communication unit, and the difference compensation coefficient is used to correct the actual aging degree data.

[0013] Beneficial effects of the present invention: 1. The present invention obtains a communication unit aging prediction model through machine learning, which can make a preliminary prediction of the aging of the communication unit, and combines the aging coefficient to achieve accurate prediction of the aging of the communication unit. Compared with the prior art, the present invention does not need to collect additional data when evaluating the aging degree of the communication unit, and can achieve fast and relatively accurate aging degree judgment. 2. The present invention uses a low-noise amplifier and a bandpass filter to perform parameter compensation for signal decay and bit error rate increase respectively. The low-noise amplifier can compensate for signal attenuation, improve the signal-to-noise ratio, and thus strengthen the signal; the bandpass filter can filter out-of-band noise and reduce the bit errors caused by interference. 3. The present invention controls the noise amplifier and the bandpass filter to perform corresponding compensation in combination with the aging prediction results, which can make the compensation parameters appropriate, that is, to ensure that the compensation is not too small to make the data transmission safe and reliable, and to ensure that the compensation is not too large to cause waste of energy resources. 4. The present invention provides differentiated compensation according to the differences in the measurement circuits of each motherboard of the communication unit, so as to make the prediction of the actual aging degree data more accurate, thereby improving the accuracy of compensation.

[0014] In summary, the present invention predicts the aging degree of the communication units of the intelligent fusion terminal and the concentrator through machine learning, and uses low-noise amplifiers and bandpass filters to perform parameter compensation for the signal degradation and bit error rate increase caused by the aging of the communication units according to the aging degree, thereby effectively improving the accuracy and reliability of power data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of an automatic parameter compensation device of an intelligent fusion terminal and a concentrator provided in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention discloses an automatic parameter compensation device for an intelligent fusion terminal and a concentrator. Those skilled in the art can refer to the content of this article and appropriately improve the technical details for implementation. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0017] The applicant has found through research that during the use of concentrators and intelligent fusion terminals, the problem of communication unit aging will occur. The aging of communication units will have a significant impact on the operating stability, data reliability and system efficiency of concentrators and intelligent fusion terminal equipment. The most important impacts include signal strength degradation and increased bit error rate (BER) during data transmission. Among them, signal strength degradation reduces the signal-to-noise ratio, greatly reducing the reliability of data transmission; increased bit error rate leads to frequent retransmissions, increased communication delays, and affected real-time performance (such as remote meter reading data delays for power concentrators).

[0018] Therefore, the embodiment of the present invention provides an automatic parameter compensation device for an intelligent fusion terminal and a concentrator, which is used to perform parameter compensation on a communication unit of the intelligent fusion terminal and the concentrator, wherein the communication unit is respectively connected to a low noise amplifier and a bandpass filter, such as Figure 1 As shown, the automatic parameter compensation device module includes: an aging prediction model training module 101, a current data acquisition module 102, an aging coefficient acquisition module 103, an aging degree acquisition module 104, and an automatic compensation module 105; The aging prediction model training module 101 is used to obtain first training data corresponding to the communication unit, and input the training data into the first training model for training to obtain the communication unit aging prediction model; wherein the first training data includes environmental data and usage time data as features and aging degree data as labels, the aging degree data includes signal degradation degree and bit error rate, and the training data are all data collected under a standard communication load rate, and the communication load rate is the communication volume per unit time; The current data acquisition module 102 is used to obtain the first environment data, the first usage duration data and the total communication data of the communication unit to be compensated; and obtain the current communication load rate of the communication unit according to the first usage duration data and the total communication data; The aging coefficient obtaining module 103 obtains a first aging coefficient of the communication unit according to the current communication load rate; wherein the aging coefficient of the communication unit is positively correlated with the communication load rate, and the greater the communication load rate, the greater the aging coefficient; The aging degree obtaining module 104 inputs the first environment data and the first usage time data into the communication unit aging prediction model to obtain initial aging degree data of the communication unit; obtains actual aging degree data according to the initial aging degree data and the first aging coefficient; wherein the actual aging degree data includes actual signal decay degree and actual bit error rate; The automatic compensation module 105 is used to control the amplification factor of the low noise amplifier to compensate for the signal attenuation of the communication unit according to the actual signal attenuation degree; and to control the passband range of the bandpass filter to compensate for the bit error rate of the communication unit according to the actual bit error rate; wherein the bit error rate of the communication unit is caused by external signal interference and is affected by the distorted signal generated by the aging of the communication unit.

[0019] It should be noted that the embodiment of the present invention simultaneously adopts two technologies, the communication unit aging prediction model and the aging coefficient, to increase the accuracy of the aging degree prediction. In actual scenarios, environmental factors are often relatively constant (even if they change, they are expected), so the impact of environmental factors on aging can be predicted through machine learning training models. However, the communication load rate changes in real time with the use of concentrators and intelligent fusion terminals, so it is difficult to generate a model through machine learning together with environmental factors, so the aging coefficient is used to represent the impact of the communication load rate on the aging of the communication unit. The embodiment of the present invention separates the two factors of change and invariance, which increases the accuracy of the aging degree prediction, so as to facilitate subsequent accurate compensation.

[0020] In addition, the embodiments of the present invention respectively perform corresponding parameter compensation for signal attenuation and bit error rate increase through a low noise amplifier and a bandpass filter, thereby improving the security and accuracy of information transmission. Moreover, the corresponding parameter compensation matches the target parameter to be compensated, avoiding waste of resources caused by over-compensation. For example, if the amplifier gain is too large, the improvement effect is the same but energy is wasted; for example, if the bandpass filter narrows the passband range too small, the filtering efficiency is almost the same, but the power consumption is much higher, and the input and output do not match.

[0021] In this specific embodiment, the aging coefficient acquisition module 103 includes: an aging coefficient function acquisition submodule and an aging coefficient acquisition submodule; The aging coefficient function acquisition submodule is used to compare the aging speed of the communication unit corresponding to different communication load rates under the same other conditions to obtain the aging coefficient function; wherein the aging coefficient function is a function in which the aging coefficient changes with the change of the communication load rate, and the aging coefficient corresponding to the standard communication load rate is specified to be 1; The aging coefficient obtaining submodule is used to query the aging coefficient function according to the current communication load rate to obtain the first aging coefficient.

[0022] It should be noted that the standard communication load rate is a range of normal communication load rates, and the first training data is data collected under the standard communication load rate, which can effectively ensure that the aging degree data output by the communication unit aging prediction model is only affected by environmental factors. Therefore, the aging coefficient corresponding to the standard communication load rate is specified to be 1. When the current communication load rate is greater than the standard communication load rate, it means that the communication unit frequently sends and receives data and ages faster, so the aging coefficient corresponding to the standard communication load rate is greater than one. When the current communication load rate is less than the standard communication load rate, it means that the communication unit sends and receives less data and ages more slowly, so the aging coefficient corresponding to the standard communication load rate is less than one.

[0023] In this specific embodiment, the current data acquisition module 102 is specifically used for: The first environment data, the first usage duration data and the total communication amount data of the communication unit to be compensated are obtained; and the total communication amount data is divided by the first usage duration data to obtain the current communication load rate.

[0024] It should be noted that the communication load rate is the communication volume of the communication unit per unit time. From the moment the intelligent converged terminal and concentrator are installed, the communication load rate, which is the total communication volume divided by the usage time data, can indicate whether it is frequently used.

[0025] In this specific embodiment, the environmental data includes at least one of temperature, humidity, PM value and electromagnetic interference.

[0026] It should be noted that these environmental data will have an impact on the aging of the communication unit.

[0027] In this specific embodiment, the aging degree obtaining module 104 is specifically used for: The first environment data and the first usage time data are input into the communication unit aging prediction model to obtain the initial signal decay degree and the initial bit error rate of the communication unit; the initial signal decay degree and the initial bit error rate are multiplied by the first aging coefficient respectively to obtain the actual signal decay degree and the actual bit error rate.

[0028] It should be noted that the effect of the communication load rate on the aging degree can be intuitively seen through this simple multiplication operation.

[0029] In this specific embodiment, the automatic compensation module 105 is specifically used for: According to the actual signal attenuation degree and the standard signal strength, the required first compensation magnification is obtained; according to the first compensation magnification, the amplification magnification of the low noise amplifier is controlled to compensate for the signal attenuation of the communication unit; wherein the standard signal strength is the signal strength of the communication unit before aging, and the more the noise amplifier compensates, the more energy is consumed; According to the actual bit error rate, the required first passband range compensation is obtained; according to the first passband range compensation, the passband range of the bandpass filter is controlled to compensate for the bit error rate of the communication unit; wherein, the narrower the passband range, the more external signals can be filtered, the lower the bit error rate, and the more energy is consumed.

[0030] It should be noted that the parameters of actual compensation must match the parameters of target demand compensation, so as to reduce resource waste while ensuring the effectiveness of compensation.

[0031] In this specific embodiment, the automatic parameter compensation device further includes: a communication unit replacement reminder module; The communication unit replacement reminder module is used to issue a reminder to replace the communication unit in response to the actual aging degree data being greater than or equal to the extreme aging standard data; wherein at least one of the signal attenuation degree and the bit error rate corresponding to the extreme aging standard data is greater than the compensation threshold.

[0032] It should be noted that when the compensation limit still cannot meet the impact of aging, in order to avoid communication anomalies, the communication unit needs to be replaced in time. The embodiment of the present invention can issue a communication unit anomaly in time.

[0033] In this specific embodiment, the automatic parameter compensation device further includes: a device difference compensation unit; The device difference compensation unit is used to obtain a difference compensation coefficient according to the loop characteristics of the communication unit; wherein the loop characteristics of the communication unit are related to the aging speed of the communication unit, and the difference compensation coefficient is used to correct the actual aging degree data.

[0034] It should be noted that due to poor process, the loop characteristics of each communication unit may be slightly different. Therefore, compensating for this part can make the aging data more accurate and facilitate subsequent compensation.

[0035] The embodiment of the present invention obtains a communication unit aging prediction model through machine learning, can make a preliminary prediction of the aging of the communication unit, and combine the aging coefficient to achieve accurate prediction of the aging of the communication unit. Compared with the prior art, the embodiment of the present invention does not need to collect additional data when evaluating the aging degree of the communication unit, and can achieve fast and relatively accurate aging degree judgment.

[0036] The embodiment of the present invention performs parameter compensation for signal attenuation and bit error rate increase through a low noise amplifier and a bandpass filter. The low noise amplifier can compensate for signal attenuation, improve the signal-to-noise ratio, and thus strengthen the signal; the bandpass filter can filter out-of-band noise and reduce bit errors caused by interference.

[0037] The embodiment of the present invention controls the noise amplifier and the bandpass filter to perform corresponding compensation in combination with the aging prediction result, so that the compensation parameters can be appropriate, that is, the compensation is not too small to ensure the safety and reliability of data transmission, and the compensation is not too large to cause waste of energy resources.

[0038] The embodiment of the present invention provides differentiated compensation according to the difference of the measurement circuit of each mainboard of the communication unit, so as to make the prediction of the actual aging degree data more accurate, thereby improving the accuracy of the compensation.

[0039] In summary, the embodiments of the present invention predict the aging degree of the communication units of the intelligent fusion terminal and the concentrator through machine learning, and use low-noise amplifiers and bandpass filters to perform parameter compensation for the signal degradation and bit error rate increase caused by the aging of the communication units according to the aging degree, thereby effectively improving the accuracy and reliability of power data transmission.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. An automatic parameter compensation device for an intelligent fusion terminal and a concentrator, characterized in that: Used to perform parameter compensation on the communication units of the intelligent fusion terminal and the concentrator, the communication units are respectively connected to the low noise amplifier and the bandpass filter, and the automatic parameter compensation device module includes: an aging prediction model training module, a current data acquisition module, an aging coefficient acquisition module, an aging degree acquisition module, and an automatic compensation module; The aging prediction model training module is used to obtain first training data corresponding to the communication unit, and input the training data into the first training model for training to obtain the communication unit aging prediction model; wherein the first training data includes environmental data and usage time data as features and aging degree data as labels, the aging degree data includes signal decay degree and bit error rate, and the training data are all data collected under a standard communication load rate, and the communication load rate is the communication volume per unit time; The current data acquisition module is used to obtain the first environment data, the first usage duration data and the total communication data of the communication unit to be compensated; and obtain the current communication load rate of the communication unit according to the first usage duration data and the total communication data; The aging coefficient obtaining module obtains a first aging coefficient of the communication unit according to the current communication load rate; wherein the aging coefficient of the communication unit is positively correlated with the communication load rate, and the greater the communication load rate, the greater the aging coefficient; The aging degree acquisition module inputs the first environment data and the first usage time data into the communication unit aging prediction model to obtain initial aging degree data of the communication unit; obtains actual aging degree data according to the initial aging degree data and the first aging coefficient; wherein the actual aging degree data includes actual signal decay degree and actual bit error rate; The automatic compensation module is used to control the amplification factor of the low-noise amplifier to compensate for the signal attenuation of the communication unit according to the actual signal attenuation degree; and to control the passband range of the bandpass filter to compensate for the bit error rate of the communication unit according to the actual bit error rate; wherein the bit error rate of the communication unit is caused by external signal interference and is affected by the distorted signal generated by aging of the communication unit.

2. The automatic parameter compensation device of the intelligent fusion terminal and concentrator according to claim 1 is characterized in that: The aging coefficient acquisition module includes: an aging coefficient function acquisition submodule and an aging coefficient acquisition submodule; The aging coefficient function acquisition submodule is used to compare the aging speed of the communication unit corresponding to different communication load rates under the same other conditions to obtain an aging coefficient function; wherein the aging coefficient function is a function in which the aging coefficient changes with the change of the communication load rate, and the aging coefficient corresponding to the standard communication load rate is specified to be 1; The aging coefficient obtaining submodule is used to query the aging coefficient function according to the current communication load rate to obtain the first aging coefficient.

3. The automatic parameter compensation device of the intelligent fusion terminal and concentrator according to claim 1, characterized in that: The current data acquisition module is specifically used for: The first environment data, the first usage duration data, and the total communication volume data of the communication unit to be compensated are obtained; and the total communication volume data is divided by the first usage duration data to obtain the current communication load rate.

4. The automatic parameter compensation device of the intelligent fusion terminal and concentrator according to claim 1, characterized in that: The environmental data includes at least one of temperature, humidity, PM value and electromagnetic interference.

5. The automatic parameter compensation device of the intelligent fusion terminal and concentrator according to claim 1, characterized in that: The aging degree obtaining module is specifically used for: Inputting the first environment data and the first usage time data into the communication unit aging prediction model to obtain the initial signal decay degree and initial bit error rate of the communication unit; The initial signal decay degree and the initial bit error rate are respectively multiplied by the first aging coefficient to obtain the actual signal decay degree and the actual bit error rate.

6. The automatic parameter compensation device of the intelligent fusion terminal and concentrator according to claim 1, characterized in that: The automatic compensation module is specifically used for: According to the actual signal attenuation degree and the standard signal strength, a required first compensation magnification is obtained; according to the first compensation magnification, the amplification magnification of the low noise amplifier is controlled to compensate for the signal attenuation of the communication unit; wherein the standard signal strength is the signal strength of the communication unit before aging, and the more the noise amplifier compensates, the more energy it consumes; According to the actual bit error rate, the required first passband range compensation is obtained; according to the first passband range compensation, the passband range of the bandpass filter is controlled to compensate for the bit error rate of the communication unit; wherein, the narrower the passband range, the more external signals can be filtered, the lower the bit error rate, and the more energy is consumed.

7. The automatic parameter compensation device of the intelligent fusion terminal and concentrator according to claim 1, characterized in that: The automatic parameter compensation device further comprises: a communication unit replacement reminder module; The communication unit replacement reminder module is used to issue a reminder to replace the communication unit in response to the actual aging degree data being greater than or equal to the extreme aging standard data; wherein at least one of the signal degradation degree and the bit error rate corresponding to the extreme aging standard data is greater than a compensation threshold.

8. The automatic parameter compensation device of the intelligent fusion terminal and concentrator according to claim 1, characterized in that: The automatic parameter compensation device further comprises: a device difference compensation unit; The device difference compensation unit is used to obtain a difference compensation coefficient according to the loop characteristics of the communication unit; wherein the loop characteristics of the communication unit are related to the aging speed of the communication unit, and the difference compensation coefficient is used to correct the actual aging degree data.

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