Cable cutting offset protection method and system based on intelligent monitoring

Abstract

This invention discloses a cable cutting offset protection method and system based on intelligent monitoring, belonging to the field of intelligent monitoring technology for cable processing. The method includes the following steps: dividing continuous cutting cycles based on a phase reference and extracting abnormal segments; connecting abnormal segments with continuous phase connections from different monitoring sources based on preset propagation relationships and propagation delays to construct candidate offset propagation chains and determine suspected offset states; outputting freeze verification control commands in suspected offset states and calculating propagation residuals based on changes in the propagation chains before and after freezing; and generating offset protection control commands based on the propagation chain start phase, inter-source propagation integrity, and propagation residuals when the propagation residuals meet the offset confirmation conditions. This invention addresses the problems of existing methods, such as difficulty in distinguishing between real cutting offset propagation and ordinary disturbance chains, susceptibility to false triggering, and insufficient protection specificity, by constructing a time-series propagation identification and freeze verification mechanism for multi-source anomalies.

Description

Technical Field

[0001] This invention relates to the field of intelligent monitoring technology for cable processing, and more specifically, to a method and system for preventing cable cutting deviation based on intelligent monitoring. Background Technology

[0002] During cable processing, the cutting process typically involves continuous actions such as tool rotation, feed, and material removal. If the tool deviates from the cable axis, it can easily lead to uneven cutting depth, localized sheath damage, miscutting of the insulation layer, or even conductor damage, thus affecting cable processing quality and subsequent safety. To mitigate these risks, existing technologies typically incorporate vibration, sound, current, displacement, or pressure monitoring units on the cutting equipment. These units monitor the cutting status based on amplitude abrupt changes, abnormal fluctuations, or threshold exceedances in the monitored signals, triggering protective actions such as deceleration, machine stoppage, or tool retraction upon detection of anomalies.

[0003] However, most existing cable cutting deviation protection methods are based on direct triggering control based on the parallel judgment of anomalies from a single monitoring source or multiple monitoring source anomalies. They focus on "whether there is an anomaly" but lack linkage analysis of the order of occurrence, propagation delay, and continuous connection between multiple source anomalies. A time-series identification mechanism for the propagation process of anomalies between different monitoring sources has not yet been established. Since factors such as cable material fluctuations, instantaneous equipment vibrations, and local contact disturbances can also cause local anomaly signals, existing methods struggle to effectively distinguish between the anomaly propagation chain caused by actual cutting deviation and ordinary disturbance chains. This leads to problems such as high false trigger rates, delayed triggering timing, and insufficient protection targeting, thus failing to meet the requirements for accurate identification and timely protection against deviation risks during cable cutting.

[0004] The above-disclosed technical solutions have at least the following technical problems: the existing cable cutting offset protection methods mainly rely on the abnormal results of each monitoring signal to directly trigger control actions, lacking a time-series propagation identification mechanism for multi-source anomalies in terms of their occurrence sequence, propagation delay, and continuous connection relationship. They cannot distinguish between the abnormal propagation chain caused by real cutting offset and the ordinary disturbance chain caused by material fluctuation, instantaneous vibration, or local disturbance, resulting in problems such as high false trigger rate, delayed triggering timing, and insufficient protection targeting in offset protection. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a cable cutting offset protection method and system based on intelligent monitoring. By constructing a multi-source anomaly time-series propagation identification and freeze verification mechanism, the present invention addresses the problems of existing methods being unable to distinguish between real cutting offset propagation and ordinary disturbance chains, being prone to false triggering, and having insufficient protection targeting.

[0006] To achieve the above objectives, the present invention provides the following technical solution: On the one hand, the cable cutting deviation protection method based on intelligent monitoring includes the following steps: acquiring the multi-source monitoring sequence and phase reference of the cable cutting process, dividing the continuous cutting cycle according to the phase reference and extracting abnormal segments; based on the preset propagation relationship and propagation delay, connecting the abnormal segments with continuous phase connection in different monitoring sources to construct a candidate deviation propagation chain, and determining the deviation suspected state according to its phase preservation degree and chain length continuity; outputting a freeze verification control command in the deviation suspected state, so that the system executes the verification cycle under the condition of maintaining the cutting depth and stopping the feed, and calculating the propagation residue based on the change of the propagation chain before and after freezing; when the propagation residue meets the deviation confirmation condition, generating a deviation protection control command based on the propagation chain start phase, the inter-source propagation integrity and the propagation residue.

[0007] In a preferred embodiment, the step of dividing continuous cutting cycles according to a phase reference and extracting abnormal segments includes: identifying cutting phase closure points based on a phase reference, and taking the data segment between two adjacent phase closure points as a cutting cycle; unfolding each cutting cycle into a phase response distribution according to phase sequence, and establishing a local phase baseline for each monitoring source within the cutting cycle; comparing the response of each monitoring source at the same phase position in the current cutting cycle with the historical response at the corresponding phase position in one or more previous cutting cycles to determine the phase deviation; when the phase deviation continuously increases in the same direction along adjacent phase intervals and repeatedly appears at similar phase positions in adjacent cutting cycles, the corresponding response segment is determined as an abnormal segment.

[0008] In a preferred embodiment, establishing the phase local baseline of each monitoring source within the cutting cycle includes: mapping the sampling points of each monitoring source within the current cutting cycle to a preset phase unit according to a phase reference, forming a phase response distribution corresponding to each monitoring source; for any target phase unit, selecting adjacent response values ​​within a preset phase range on both sides as local reference data, and fitting and generating the phase local baseline value corresponding to the target phase unit based on the continuous change relationship between the phase position and the response value of the local reference data; repeating the mapping and fitting operations to obtain the complete phase local baseline of each monitoring source within the current cutting cycle.

[0009] In a preferred embodiment, the step of connecting anomalous segments with continuous phase connections in different monitoring sources based on a preset propagation relationship and propagation delay to construct a candidate offset propagation chain includes: establishing a preset propagation relationship based on the order in which each monitoring source characterizes the cutting offset; determining the allowable connection phase interval of the next monitoring source based on the ending phase position, continuous phase width, and change direction of the anomalous segment of the previous monitoring source, combined with the propagation delay and the phase advancement rate of the current cutting cycle; connecting subsequent anomalous segments whose initial phase falls within the interval and whose change direction and intensity evolution are consistent to form a single-cycle propagation branch; performing continuation matching on single-cycle propagation branches in adjacent cutting cycles where the monitoring source connection order is consistent, the initial phase falls within the preset return phase range, and the phase migration is continuously inherited, and determining the results that meet the requirements of minimum continuation cycle number and minimum chain length as candidate offset propagation chains.

[0010] In a preferred embodiment, determining the allowable connection phase interval of the next monitoring source includes: for the source pair of the previous and next monitoring sources, pre-determining the upper and lower bounds of the propagation delay; determining the phase advance rate per unit time based on the cycle length of the current cutting cycle, and converting the upper and lower bounds of the propagation delay into the minimum phase migration amount and the maximum phase migration amount; compensating the maximum phase migration amount according to the continuous phase width of the previous abnormal segment and a preset width compensation value; and mapping the phase migration interval of the next monitoring source according to its change direction, starting from the end phase position of the previous abnormal segment.

[0011] In a preferred embodiment, determining the suspected offset state based on its phase preservation degree and chain length continuity includes: generating a phase inheritance corridor for the next cutting cycle based on the starting phase position of the candidate offset propagation chain in the current cutting cycle and the phase migration amount between each source; searching for inheritance segments falling into the phase inheritance corridor in the next cutting cycle, and determining the phase preservation degree based on their effective coverage length and coverage continuity; using the inheritance segments to continue forming the current propagation chain, and determining the chain length continuity based on its effective chain length preservation result relative to the previous cutting cycle; tracking the phase preservation degree and chain length continuity in multiple consecutive cutting cycles, and determining it as a suspected offset state when both continuously meet a preset continuity condition.

[0012] In a preferred embodiment, the step of outputting a freeze verification control command in the suspected offset state, enabling the system to execute a verification cycle while maintaining the cutting depth and stopping the feed, includes: recording the current cutting depth, the current cutting cycle phase reference, and the candidate offset propagation chain when the suspected offset state is triggered, as a freeze verification reference state; outputting a feed freeze control quantity to the feed actuator, setting subsequent feed increments to zero, and locking the cutting depth to the current cutting depth corresponding to the reference state; maintaining the cutting rotation, clamping, and monitoring sampling states unchanged, enabling the system to run a preset number of verification cutting cycles while stopping the feed; continuously acquiring multi-source monitoring sequences and phase references within each verification cutting cycle, and generating a verification propagation chain according to the original abnormal segment extraction rules and propagation chain construction rules.

[0013] In a preferred embodiment, the step of calculating the propagation residual based on the changes in the propagation chain before and after freezing includes: aligning the verification propagation chain in each verification cutting cycle with the candidate offset propagation chain corresponding to the frozen verification reference state according to the monitoring source order; extracting the common retention portion of the two in terms of the starting phase position, monitoring source coverage order, and effective chain length as the propagation residual portion; determining the phase residual amount, sequence residual amount, and chain length residual amount based on the propagation residual portion, and combining it with its retention results in consecutive verification cutting cycles and the number of consecutive residual cycles to form the propagation residual.

[0014] In a preferred embodiment, when the propagation residual meets the offset confirmation condition, the offset protection control command is generated based on the propagation chain start phase, inter-source propagation integrity, and propagation residual. This includes: extracting the propagation chain start phase position that meets the offset confirmation condition, and generating an offset danger azimuth interval in combination with a preset azimuth extension range; determining the inter-source propagation integrity based on the proportion of the number of monitoring sources continuously covered by the propagation chain along a preset propagation relationship to the total number of monitoring sources; determining the offset protection level based on the residual level interval where the propagation residual is located and the integrity level interval where the inter-source propagation integrity is located, and generating corresponding offset protection control commands such as load reduction and speed reduction, pausing the feed and retracting the tool, or terminating cutting; and writing the offset danger azimuth interval into the offset protection control command.

[0015] On the other hand, the cable cutting deviation protection system based on intelligent monitoring includes the following modules: a segment extraction module, used to acquire multi-source monitoring sequences and phase references of the cable cutting process, divide continuous cutting cycles according to the phase references, and extract abnormal segments; a propagation chain construction module, used to connect abnormal segments with continuous phase connection in different monitoring sources based on preset propagation relationships and propagation delays, construct candidate deviation propagation chains, and determine the deviation suspicion state based on their phase retention degree and chain length continuity; a freeze verification module, used to output freeze verification control commands in the deviation suspicion state, enabling the system to execute the verification cycle while maintaining the cutting depth and stopping the feed, and calculate the propagation residue based on the changes in the propagation chain before and after freezing; and a protection control module, used to generate deviation protection control commands based on the propagation chain start phase, inter-source propagation integrity, and propagation residue when the propagation residue meets the deviation confirmation conditions.

[0016] The technical effects and advantages of the cable cutting deviation protection method and system based on intelligent monitoring of this invention are as follows: This invention acquires multi-source monitoring sequences and phase references during cable cutting, extracts abnormal segments according to continuous cutting cycles, and constructs candidate offset propagation chains across monitoring sources based on preset propagation relationships and propagation delays. Furthermore, it combines phase retention, chain length continuity, and propagation residue before and after freeze verification to perform progressive judgment and control of cutting offsets, consisting of "suspected identification - freeze verification - residue confirmation - graded protection." This not only allows for the early identification of offset risks with genuine propagation characteristics before the offset develops into significant instability, but also effectively distinguishes between instantaneous disturbances, random noise, and continuous offset propagation, reducing false alarms and missed alarms. Simultaneously, after confirming the offset, it can generate targeted offset protection control commands by combining the propagation chain's initial phase, inter-source propagation integrity, and propagation residue, achieving directional protection and graded handling of dangerous circumferential areas, thereby improving the accuracy of offset identification, the timeliness of control, and the processing safety during cable cutting. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating the cable cutting deviation protection method based on intelligent monitoring according to the present invention. Figure 2 This is a schematic diagram of the cable cutting deviation protection system based on intelligent monitoring according to the present invention; Figure 3 This is a diagram showing the phase inheritance corridor, inheritance fragments, and the current propagation chain. Figure 4 This is a graph showing the results of the transmission residue and transmission residue level during the freeze verification phase. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1, Figure 1 The present invention provides a cable cutting offset protection method based on intelligent monitoring, comprising the following steps: S1, acquire the multi-source monitoring sequence and phase reference of the cable cutting process, divide the continuous cutting cycle according to the phase reference and extract abnormal segments; In this embodiment, the multi-source monitoring sequence includes at least an execution load response sequence: used to characterize the load changes of the cutting actuator during the cutting process, specifically characterized by spindle current, drive torque, feed resistance or cutting load; Structural vibration response sequence: used to characterize the vibration state changes of tool assemblies, clamping assemblies or cutting contact areas, specifically characterized by vibration acceleration, vibration velocity or impact response; Cutting result feedback sequence: used to characterize the changes in the results of cutting action on the cable surface or cut area, specifically characterized by cut width, cutting contact state, surface morphology changes, acoustic emission response or local contact feedback.

[0020] The phase reference is a periodic positional reference used to characterize the position of the cutting tool relative to the circumference of the cable, and is used to determine the circumferential phase position of each cutting sampling point in the current cutting rotation.

[0021] The phase reference includes an original phase reference and an equivalent phase reference. When an anomaly in phase advance is detected in the original phase reference, the phase stability features that recur in the continuous cutting cycle are extracted from the multi-source monitoring sequence, and the original phase reference is corrected based on the phase stability features to generate an equivalent phase reference.

[0022] Before dividing the continuous cutting cycle based on the phase reference, the following is included: Identify the distorted segments in the original phase reference; for the distorted segments, establish a phase correction mapping using response feature points that repeat across cycles in the multi-source monitoring sequence; generate an equivalent phase reference based on the phase correction mapping.

[0023] The process of dividing continuous cutting cycles according to a phase reference and extracting abnormal segments includes: The cutting phase closure point is identified based on the phase reference, and the data segment between two adjacent phase closure points is used as a cutting cycle. Each cutting cycle is unfolded into a phase response distribution in phase order, and a local phase baseline for each monitoring source within that cutting cycle is established. The phase deviation is determined by comparing the responses of each monitoring source at the same phase position in the current cutting cycle with the historical responses at the corresponding phase positions in one or more previous cutting cycles. When the phase deviation increases continuously in the same direction along adjacent phase intervals and repeats at similar phase positions in adjacent cutting cycles, the corresponding response segment is identified as an abnormal segment.

[0024] The abnormal fragment includes at least the following attributes: The monitoring source, the initial phase of the anomaly, the duration of the anomaly, the direction of the anomaly, and the increment of the anomaly intensity.

[0025] Furthermore, the step of unfolding each cutting cycle into a phase response distribution in phase order and establishing a local phase baseline for each monitoring source within that cutting cycle includes: The sampling points of each monitoring source in the current cutting cycle are mapped to the preset phase unit according to the phase reference and arranged in the order of phase increment to form the phase response distribution corresponding to each monitoring source. For each monitoring source's response value at any target phase unit, adjacent response values ​​within a preset phase range on both sides of the target phase unit are selected as local reference data; Based on the continuous change relationship between the phase position and the response value of the local reference data, the background response trend at the target phase unit is fitted to generate the local phase baseline value corresponding to the target phase unit. The above process is repeated for each phase unit in the current cutting cycle to obtain the complete local phase baseline of each monitoring source in the cutting cycle.

[0026] S2, based on the preset propagation relationship and propagation delay, connect the abnormal segments with continuous phase connection in different monitoring sources, construct candidate offset propagation chains, and determine the suspected offset state according to their phase preservation degree and chain length continuity. In this embodiment, the step of constructing a candidate offset propagation chain by connecting anomalous segments with continuous phases in different monitoring sources based on a preset propagation relationship and propagation delay includes: Based on the order in which each monitoring source characterizes the cutting offset, a pre-defined propagation relationship is established between the monitoring sources; The preset propagation relationship is determined based on the order in which each monitoring source characterizes the cutting offset. For the execution load response sequence, structural vibration response sequence, and cutting result feedback sequence, the preset propagation relationship is preferably established in the order of "execution load response - structural vibration response - cutting result feedback". This order originates from the physical transmission path of the cutting offset first changing the load on the actuator, then causing changes in the vibration of the tool / clamping structure, and finally reflecting the change in the result in the kerf, contact state, or surface morphology.

[0027] Based on any abnormal segment in the previous monitoring source, extract its ending phase position, continuous phase width and change direction, and determine the phase migration interval in the next monitoring source that allows the establishment of a propagation connection according to the corresponding propagation delay and the phase advance rate of the current cutting cycle. In the next monitoring source, search for subsequent abnormal segments whose starting phase falls within the phase migration interval, whose change direction satisfies the propagation inheritance condition, and whose intensity increment maintains evolution consistency with the previous abnormal segment, and establish a propagation connection between the subsequent abnormal segment and the previous abnormal segment. The abnormal segments in multiple monitoring sources are sequentially connected along the preset propagation relationship to form a single-cycle propagation branch within the current cutting cycle; In adjacent cutting cycles, single-cycle propagation branches with starting phase positions falling within a preset return phase range, consistent monitoring source connection order, and continuous inheritance relationship between phase migration amounts of each source are matched across cycles. The cross-cycle continuation matching results that meet the requirements of minimum continuation period number and minimum chain length are retained, and the retained results are determined as candidate offset propagation chains. It should be noted that the phase transition interval in the subsequent monitoring source that allows the establishment of propagation connections includes: For a source pair between the previous and next monitoring sources, the lower and upper bounds of the propagation delay corresponding to the source pair are determined in advance. Based on the cycle length of the current cutting cycle, calculate the phase advance rate per unit time within that cutting cycle; Multiplying the lower and upper bounds of the propagation delay by the phase advance rate per unit time respectively yields the initial minimum and maximum phase shifts. The step of pre-determining the lower and upper bounds of the propagation delay for the source pair includes: statistically analyzing historical response data of the preceding and following monitoring sources under normal cutting conditions; extracting historical propagation delay samples between the abnormal response start point in the preceding monitoring source and the corresponding response start point in the following monitoring source; using the lower quantile delay of the historical propagation delay samples as the lower bound of the propagation delay and the upper quantile delay of the historical propagation delay samples as the upper bound of the propagation delay. The sustained phase width of the preceding abnormal segment is read, and the width compensation amount is calculated according to the preset width compensation value. The width compensation value is used to characterize the degree of relaxation of the sustained phase width of the preceding abnormal segment to the upper limit of the search of the next monitoring source. Its value is determined by the tail width distribution of adjacent monitoring source abnormal segments in the normal cutting sample, preferably 0.3 to 0.8.

[0028] The width compensation amount is superimposed on the initial maximum phase shift amount to obtain the compensated maximum phase shift amount; Starting from the end phase position of the previous abnormal segment, the minimum phase migration amount and the compensated maximum phase migration amount are mapped to the phase search range of the next monitoring source according to the change direction of the previous abnormal segment, thus forming the phase migration interval.

[0029] The specific formula for calculating the width compensation amount is as follows:

[0030] The maximum phase shift after compensation is:

[0031] in, This is the width compensation amount. This is the width compensation value. , The duration of the previous anomalous segment. This is the initial maximum phase shift. This represents the maximum phase shift after compensation.

[0032] Furthermore, the determination of the suspected offset state based on its phase retention degree and chain length continuity includes: The starting phase position of the candidate offset propagation chain in the current cutting cycle and the phase shift between adjacent monitoring sources are extracted. Based on the starting phase position and phase shift, a phase inheritance corridor corresponding to the next cutting cycle is generated. The phase inheritance corridor refers to the group of multi-monitoring source phase intervals arranged in the propagation order, obtained by estimating the expected inherited phase position of the candidate offset propagation chain on each monitoring source in the next cutting cycle based on its starting phase position and the phase shift between each source along a preset propagation relationship, and introducing a phase fluctuation tolerance range around each expected inherited phase position. The phase inheritance corridor is used to constrain the search range of the same candidate offset propagation chain in the next cutting cycle.

[0033] In the next cutting cycle, anomaly segments whose starting phase falls within the phase inheritance corridor are searched and used as inheritance segments of the candidate offset propagation chain. Based on the effective coverage length and coverage continuity of the inherited segment within the phase inheritance corridor, the phase retention degree of the candidate offset propagation chain in the next cutting cycle is determined. This phase retention degree characterizes the extent to which the candidate offset propagation chain preserves the phase inheritance corridor in the next cutting cycle, and is determined based on the effective coverage length and coverage continuity of the inherited segment within the phase inheritance corridor. Preferably, the phase retention degree is determined by the ratio of the sum of the overlap lengths of the actual phase coverage intervals of the inherited segment and the corresponding phase inheritance intervals on each monitoring source to the total length of the phase inheritance corridor, combined with the ratio of the number of monitoring sources included in the longest continuous coverage segment to the total number of monitoring sources in the phase inheritance corridor. Starting with the inherited segment, abnormal segments in the next monitoring source are connected along a preset propagation relationship to form the current propagation chain in the next cutting cycle. The chain length continuity of the candidate offset propagation chain in the next cutting cycle is determined based on the effective chain length retention result of the current propagation chain relative to the candidate offset propagation chain in the previous cutting cycle. The phase retention degree characterizes the degree to which the candidate offset propagation chain retains the phase inheritance corridor in the next cutting cycle, and is determined based on the effective coverage length and coverage continuity of the inherited segment within the phase inheritance corridor. Preferably, the phase retention degree is determined by the ratio of the sum of the overlap lengths of the actual phase coverage intervals of the inherited segment and the corresponding phase inheritance intervals on each monitoring source to the total length of the phase inheritance corridor, combined with the ratio of the number of monitoring sources included in the longest continuous coverage segment to the total number of monitoring sources in the phase inheritance corridor. In multiple consecutive cutting cycles, the phase preservation degree and chain length continuity of the same candidate offset propagation chain are tracked. When the same candidate offset propagation chain continuously maintains both phase preservation degree and chain length continuity that meet preset continuity conditions in multiple consecutive cutting cycles, it is identified as an offset suspected state. The preset continuity conditions include: cutting cycles with phase preservation degree meeting the phase preservation benchmark form a phase preservation continuous segment, cutting cycles with chain length continuity meeting the chain length continuity benchmark form a chain length continuity continuous segment, and the overlap interval between the phase preservation continuous segment and the chain length continuity continuous segment on the time axis reaches a preset overlap duration. When the same candidate offset propagation chain meets the preset continuity conditions, it is identified as an offset suspected state. The phase preservation benchmark is determined by the statistical lower bound of the phase preservation degree of similar candidate offset propagation chains in the preceding stable cutting stage; the chain length continuity benchmark is determined by the statistical lower bound of the chain length continuity of similar candidate offset propagation chains in the preceding stable cutting stage.

[0034] It should be noted that the generation of the phase inheritance corridor corresponding to the next cutting cycle based on the starting phase position and phase shift amount includes: Extract the starting phase position of the candidate offset propagation chain in the current cutting cycle, as well as the phase shift between adjacent monitoring sources along the preset propagation relationship; The starting phase position is used as the inherited reference phase of the first monitoring source in the next cutting cycle; According to the preset propagation relationship, the phase shift between each adjacent monitoring source is accumulated and mapped to obtain the predicted inherited phase position of each monitoring source in the next cutting cycle of the candidate offset propagation chain. For each monitoring source, the predicted inherited phase position is combined with a preset phase fluctuation tolerance to generate the phase inheritance interval of each monitoring source. The preset phase fluctuation tolerance is determined based on the initial phase fluctuation of the candidate offset propagation chain in the preceding stable cutting cycle and the phase migration fluctuation between each source, and is used to limit the allowable offset range of the predicted inherited phase position in the next cutting cycle.

[0035] The phase inheritance intervals of each monitoring source are sequentially associated according to the preset propagation relationship to form a phase inheritance corridor corresponding to the next cutting cycle.

[0036] Further, determining the phase preservation degree of the candidate offset propagation chain in the next cutting cycle based on the effective coverage length and coverage continuity of the inherited fragment within the phase inheritance corridor includes: Extract the phase inheritance interval of the phase inheritance corridor on each monitoring source, and the actual phase coverage interval of the inherited segment on the corresponding monitoring source; For any monitoring source, the overlapping segment between the actual phase coverage interval and the corresponding phase inheritance interval is determined, and the phase length of the overlapping segment is determined as the local coverage length on the monitoring source. The local coverage lengths of each monitoring source are summed to obtain the effective coverage length of the inherited segment within the phase inheritance corridor. According to the preset propagation relationship, it is determined whether the monitoring sources with local coverage length form a continuous inheritance sequence, and based on whether there is a coverage break between adjacent monitoring sources in the continuous inheritance sequence, the coverage continuity of the inheritance segment in the phase inheritance corridor is determined. The phase retention degree of the candidate offset propagation chain in the next cutting cycle is determined based on the coverage ratio of the effective coverage length to the total length of the phase inheritance corridor, and the degree of continuous inheritance characterized by the coverage continuity.

[0037] The step of determining the chain length continuity of the candidate offset propagation chain in the next cutting cycle based on the effective chain length maintenance result of the current propagation chain relative to the candidate offset propagation chain of the previous cutting cycle includes: Extract the continuous sequence of each monitoring source covered by the candidate offset propagation chain of the previous cutting cycle along the preset propagation relationship, and determine the number of monitoring sources corresponding to the continuous sequence as the previous effective chain length; Extract the continuous sequence of each monitoring source covered by the current propagation chain along the preset propagation relationship in the next cutting cycle, and determine the number of monitoring sources corresponding to the continuous sequence as the current effective chain length; Align the current propagation chain with the candidate offset propagation chain of the previous cutting cycle according to the order of monitoring sources, identify the longest continuous monitoring source sequence that is covered by both, and determine the number of monitoring sources corresponding to the longest continuous monitoring source sequence as the effective chain length preservation value. The degree of chain length continuity of the candidate offset propagation chain in the next cutting cycle is determined based on the retention ratio of the effective chain length retention value relative to the previous effective chain length.

[0038] Figure 3 The diagram presents the phase inheritance corridor, inheritance segments, and current propagation chain results of this invention. Between adjacent cutting cycles, a phase inheritance corridor is generated based on the candidate offset propagation chain of the previous cutting cycle, and the inheritance segments are identified and the current propagation chain is constructed in the next cutting cycle. In the diagram, the horizontal axis represents phase, and the vertical axis represents different monitoring sources, including executed load response, structural vibration response, and cutting result feedback. The light-colored horizontal intervals corresponding to each monitoring source represent the phase inheritance corridor generated based on the starting phase position of the propagation chain of the previous cutting cycle and the phase migration between sources. The dark-colored short intervals on each monitoring source represent the inheritance segments identified in the next cutting cycle, and the broken line represents the current propagation chain formed by continuing to connect the inheritance segments along a preset propagation relationship.

[0039] As shown in the figure, the actual phase positions of the current propagation chain at the three monitoring sources all fall within the corresponding phase inheritance corridors, and maintain the same propagation order and phase migration relationship as the previous cutting cycle. This indicates that the candidate offset propagation chain has good phase inheritance and chain continuity between adjacent cutting cycles. This figure illustrates that the present invention does not perform single-point judgment on isolated anomalies, but rather constrains the search range of the same candidate offset propagation chain in the next cutting cycle through phase inheritance corridors, and forms the current propagation chain based on inherited segments, thereby providing a basis for determining the degree of phase preservation and chain length continuity in subsequent processes.

[0040] S3 outputs a freeze verification control command when the offset is suspected, so that the system performs the verification cycle while maintaining the cutting depth and stopping the feed, and calculates the propagation residue based on the changes in the propagation chain before and after freezing. In this embodiment, the step of outputting a freeze verification control command in the suspected offset state, enabling the system to execute the verification cycle while maintaining the cutting depth and stopping the feed, includes: Record the current cutting depth, current cutting cycle phase reference, and corresponding candidate offset propagation chain when the suspected offset state is triggered, as the freeze verification reference state; the freeze verification reference state refers to the combined state of the current cutting depth, current cutting cycle phase reference, candidate offset propagation chain, and phase inheritance corridor corresponding to the candidate offset propagation chain at the moment the suspected offset state is triggered, which is used as a unified comparison benchmark in the freeze verification stage. Output a feed freeze control value to the feed actuator, set the subsequent feed increment to zero, and lock the cutting depth of the tool relative to the cable in a closed loop at the current cutting depth corresponding to the freeze verification reference state; Maintaining the cutting rotation, clamping state, and monitoring sampling state unchanged, the system runs a preset number of verification cutting cycles without continuing to feed the tool; During each verification cutting cycle, multi-source monitoring sequences and phase references are continuously collected, and the verification propagation chain for the frozen verification stage is generated according to the same abnormal segment extraction rules and propagation chain construction rules as the offset suspected state determination stage.

[0041] The calculation of propagation residual based on changes in the propagation chain before and after freezing includes: Align the verification propagation chain in each verification cutting cycle with the candidate offset propagation chain corresponding to the frozen verification reference state according to the monitoring source order; Extract the common retention portion of the verification propagation chain and the candidate offset propagation chain in terms of starting phase position, monitoring source coverage order and effective chain length, and determine the common retention portion as the propagation residue portion; Based on the initial phase deviation of the propagation residue in each verification cutting cycle, the length of the longest continuous monitoring source sequence covered by the common coverage, and the effective chain length retention ratio, the phase residue, sequence residue, and chain length residue are determined respectively. Based on the retention results of the phase residue, sequence residue, and chain length residue in continuous verification cutting cycles, the number of consecutive residue cycles of the propagation residue portion is determined. The propagation residual degree is formed based on the combined retention results of the number of consecutive residual cycles, the phase residual amount, the sequence residual amount, and the chain length residual amount.

[0042] The propagation residual is used to characterize the degree to which the structure of the verification propagation chain during the frozen verification stage is preserved relative to the candidate offset propagation chain before freezing, under the condition that the feed is stopped but the cutting rotation is maintained. Preferably, the propagation residual is formed by combining the phase residual, the sequence residual, and the chain length residual; wherein, the phase residual is used to characterize the degree to which the verification propagation chain retains the initial phase position before freezing, the sequence residual is used to characterize the degree to which the verification propagation chain retains the monitoring source coverage order before freezing, and the chain length residual is used to characterize the degree to which the verification propagation chain retains the effective chain length before freezing.

[0043] The specific formula for calculating the propagation residual is as follows:

[0044]

[0045]

[0046]

[0047]

[0048] in, To spread residual levels, The number of consecutive residual periods. To verify the total number of cutting cycles, A set of continuous verification cutting cycles to meet the residue determination criteria. Let J be the residual value in the j-th period. This is the normalized result corresponding to the phase residual. This represents the initial phase deviation of the verification propagation chain relative to the candidate offset propagation chain corresponding to the frozen verification reference state during the j-th verification cutting cycle. To preset the allowable phase deviation, Let be the length of the longest continuous monitoring source sequence jointly maintained by the verification propagation chain and the candidate offset propagation chain before freezing during the j-th verification cutting cycle. The length of the reference monitoring source continuous sequence before freezing the candidate offset propagation chain. This is the normalized result corresponding to the sequential residual amount. This is the normalized result corresponding to the residual chain length. The effective chain length maintained jointly by the verification propagation chain and the candidate offset propagation chain before freezing during the j-th verification cutting cycle. The reference effective chain length for the candidate offset propagation chain before freezing.

[0049] S4, when the propagation residual meets the offset confirmation condition, generate an offset protection control command based on the propagation chain start phase, inter-source propagation integrity and propagation residual.

[0050] The offset confirmation conditions include: The propagation residual reaches the preset confirmation value, and the candidate offset propagation chain after the freeze verification still maintains the same starting phase direction as before the freeze verification; When the offset confirmation condition is met, the suspected offset state is determined as the actual offset state.

[0051] In this embodiment, when the propagation residual meets the offset confirmation condition, the offset protection control command is generated based on the propagation chain start phase, inter-source propagation integrity, and propagation residual, including: Extract the starting phase position of the propagation chain that meets the offset confirmation condition, and generate the corresponding offset danger azimuth interval with the starting phase position of the propagation chain as the center and combined with the preset azimuth extension range. The number of monitoring sources continuously covered along the preset propagation relationship in the propagation chain is counted, and the inter-source propagation integrity is determined by the proportion of the number of continuously covered monitoring sources to the total number of monitoring sources in the preset propagation relationship. The corresponding offset protection level is determined based on the residual level range of the propagation residualness and the integrity level range of the inter-source propagation integrity. When the offset protection level is the first level, an offset protection control command for load reduction and speed reduction is generated; When the offset protection level is the second level, an offset protection control command is generated to pause the feed and retract the tool; When the offset protection level is the third level, an offset protection control command to terminate cutting is generated. The offset danger azimuth range is written into the offset protection control command to identify the circumferential danger area corresponding to the currently confirmed offset propagation.

[0052] The step of determining the corresponding offset protection level based on the residual level range of the propagation residuality and the integrity level range of the inter-source propagation integrity includes: If the propagation chain only continuously covers the monitoring source corresponding to the first critical propagation stage, it is determined to be a Level 1 offset protection; If the transmission chain continuously covers the monitoring source corresponding to the second critical transmission stage, but does not continuously cover the last monitoring source, it is determined to be a level 2 offset protection. If the propagation chain continuously covers the last monitoring source, it is determined to be a level 3 offset protection. The first critical propagation stage and the second critical propagation stage are determined by the functional conversion nodes in the preset propagation relationship; when the preset propagation relationship is "execution load response - structural vibration response - cutting result feedback", the node from execution load response to structural vibration response corresponds to the first critical propagation stage, and the node from structural vibration response to cutting result feedback corresponds to the second critical propagation stage.

[0053] The generation of offset protection control instructions also includes: Continue to acquire multi-source monitoring sequences after the execution of protective actions, re-extract micro-anomaly fragments and construct new candidate offset propagation chains; When a new candidate offset propagation chain no longer meets the offset confirmation condition, the offset protection state is deactivated and normal cutting control is restored.

[0054] Example 2: Offset Confirmation and Protection under Freeze Verification of the Present Invention The system uses three monitoring sources: execution load response, structural vibration response, and cutting result feedback. The preset propagation relationship is "execution load response - structural vibration response - cutting result feedback". The initial phase position of the candidate offset propagation chain identified in the current cutting cycle is set at 34°, the phase shift from execution load response to structural vibration response is 7°, and the phase shift from structural vibration response to cutting result feedback is 9°. Based on this initial phase position and phase shift, a phase inheritance corridor for the next cutting cycle is generated, where the phase inheritance intervals for each monitoring source are 32°–36°, 39°–43°, and 48°–52°, respectively.

[0055] In the next cutting cycle, the actual phase coverage intervals of the inherited segments on the three monitoring sources were identified as 33°–36°, 40°–42°, and 49°–51°, respectively. Based on this, the local coverage lengths on each monitoring source are 3°, 2°, and 2°, respectively, with an effective coverage length of 7°. If the total length of the corresponding phase inheritance corridor is 12°, the effective coverage ratio is 7 / 12. Furthermore, since all three monitoring sources form continuous inheritance sequences, the coverage continuity is 3 / 3. Based on the effective coverage ratio and coverage continuity, the phase preservation level of the current cutting cycle is determined to meet the phase preservation benchmark.

[0056] Furthermore, starting from this inherited fragment, abnormal fragments are connected to obtain the current propagation chain, which continuously covers three monitoring sources: execution load response, structural vibration response, and cutting result feedback. The previous effective chain length of the candidate offset propagation chain of the previous cutting cycle is 3, and the length of the longest continuous monitoring source sequence covered by the current propagation chain and the candidate offset propagation chain of the previous cutting cycle is also 3. Therefore, the chain length continuity is 3 / 3.

[0057] In three consecutive cutting cycles, the phase retention and chain length continuity of the candidate offset propagation chain both met the preset continuity conditions, so it was determined to be an offset suspected state and entered the freeze verification.

[0058] During the freeze verification phase, subsequent feed increments are set to zero, while the current cutting depth and cutting rotation remain unchanged, and three verification cutting cycles are executed consecutively. In these three verification cutting cycles, the initial phase deviations of the verification propagation chain relative to the candidate offset propagation chain before freeze are 1°, 2°, and 2°, respectively; the longest continuously monitored source sequence lengths are 3, 3, and 2, respectively; and the effective chain lengths are 3, 3, and 2, respectively. Based on the propagation residual calculation results, the propagation residual reaches the preset confirmation value, and the verification propagation chain after freeze verification still maintains the same initial phase direction as before freeze verification. Therefore, the suspected offset state is determined to be the actual offset state.

[0059] Since the true offset propagation chain continuously covers the last monitoring source, the propagation integrity between sources is 3 / 3, corresponding to level three offset protection. Therefore, a cut termination control command is output, and the circumferential area near 34° is marked as the offset danger azimuth interval.

[0060] Figure 4 The figure shows the results of a quantitative characterization of the residual status of the verification propagation chain relative to the candidate offset propagation chain before freezing during the freeze verification phase. The horizontal axis represents the verification period, and the vertical axis represents the normalized values. The bar charts represent the phase residual, sequence residual, and chain length residual within each verification period, respectively. The broken line represents the propagation residual degree formed by the combination of these residuals, and the dashed line represents the preset offset confirmation threshold.

[0061] As shown in the figure, under the freeze verification condition, the verification propagation chain maintains high phase residue, sequence residue, and chain length residue in the first few verification cycles. The corresponding propagation residue is higher than the preset confirmation threshold, indicating that when the feed is stopped but the current cutting depth and rotation conditions remain unchanged, the original candidate offset propagation chain still has observable structural retention characteristics, thus distinguishing the real offset propagation from the pseudo propagation formed only by continued feed amplification. As the verification cycle progresses, the propagation residue gradually decreases, reflecting the attenuation process of the propagation chain residue strength during the freeze verification stage. This figure is used to illustrate that the present invention uses freeze verification to confirm the authenticity of candidate offset propagation chains, and uses the propagation residue as an important basis for subsequent offset confirmation and protection control command generation.

[0062] Example 3, Figure 2 The present invention provides a cable cutting deviation protection system based on intelligent monitoring, comprising the following modules: Segment extraction module: used to acquire multi-source monitoring sequences and phase references of the cable cutting process, divide continuous cutting cycles according to the phase references and extract abnormal segments; The propagation chain construction module is used to connect abnormal segments with continuous phase in different monitoring sources based on preset propagation relationships and propagation delays, construct candidate offset propagation chains, and determine the suspected offset status based on the degree of phase preservation and chain length continuity. Freeze verification module: Used to output freeze verification control commands when the offset is suspected, so that the system can perform the verification cycle while maintaining the cutting depth and stopping the feed, and calculate the propagation residue based on the changes in the propagation chain before and after freezing; Protection control module: When the propagation residual meets the offset confirmation conditions, it generates offset protection control commands based on the propagation chain start phase, inter-source propagation integrity, and propagation residual.

[0063] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0064] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product.

[0065] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0066] In addition, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0067] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0068] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for cable cut-off excursion protection based on intelligent monitoring, characterized in that, Includes the following steps: Acquire multi-source monitoring sequences and phase references for the cable cutting process, divide continuous cutting cycles according to the phase references, and extract abnormal segments; Based on the preset propagation relationship and propagation delay, abnormal segments with continuous phase connection in different monitoring sources are connected to construct candidate offset propagation chains, and the suspected offset status is determined according to the degree of phase preservation and chain length continuity. When the offset is suspected, the system outputs a freeze verification control command, which enables the system to perform the verification cycle while maintaining the cutting depth and stopping the feed, and calculates the propagation residue based on the changes in the propagation chain before and after freezing. When the propagation residual meets the offset confirmation condition, an offset protection control command is generated based on the propagation chain start phase, inter-source propagation integrity, and propagation residual.

2. The intelligent monitoring based cable cut drift guard method of claim 1, wherein, The process of dividing continuous cutting cycles according to a phase reference and extracting abnormal segments includes: The cutting phase closure point is identified based on the phase reference, and the data segment between two adjacent phase closure points is used as a cutting cycle. Each cutting cycle is unfolded into a phase response distribution in phase order, and a local phase baseline for each monitoring source within that cutting cycle is established. The phase deviation is determined by comparing the responses of each monitoring source at the same phase position in the current cutting cycle with the historical responses at the corresponding phase positions in one or more previous cutting cycles. When the phase deviation increases continuously in the same direction along adjacent phase intervals and repeats at similar phase positions in adjacent cutting cycles, the corresponding response segment is identified as an abnormal segment.

3. The cable cutting deviation protection method based on intelligent monitoring according to claim 2, characterized in that, The establishment of local phase baselines for each monitoring source during the cutting cycle includes: The sampling points of each monitoring source in the current cutting cycle are mapped to the preset phase unit according to the phase reference to form the phase response distribution corresponding to each monitoring source; For any target phase cell, adjacent response values ​​within a preset phase range on both sides are selected as local reference data. Based on the continuous change relationship between the phase position and the response value of the local reference data, the local baseline value of the phase corresponding to the target phase cell is fitted and generated. Repeat the mapping and fitting operations to obtain the complete local phase baseline of each monitoring source within the current cutting cycle.

4. The cable cutting deviation protection method based on intelligent monitoring according to claim 3, characterized in that, The process of constructing candidate offset propagation chains by connecting anomalous segments with continuous phases from different monitoring sources based on preset propagation relationships and propagation delays includes: A pre-defined propagation relationship is established based on the order in which each monitoring source characterizes the cutting offset; Based on the ending phase position, continuous phase width, and direction of change of the abnormal segment of the previous monitoring source, and combined with the propagation delay and the phase advance rate of the current cutting cycle, the allowable connection phase interval of the next monitoring source is determined. Connecting subsequent anomalous segments whose initial phase falls within the interval and whose change direction and intensity evolution are consistent forms a single-cycle propagation branch; For single-cycle propagation branches with consistent monitoring source connection order, initial phase falling within the preset return phase range, and continuous phase migration inheritance in adjacent cutting cycles, a continuation matching is performed, and the results that meet the requirements of minimum continuation cycle number and minimum chain length are determined as candidate offset propagation chains.

5. The intelligent monitoring based cable cut drift guard method of claim 4, wherein, The determination of the permissible connection phase interval for the next monitoring source includes: For source pairs between the preceding and following monitoring sources, the upper and lower bounds of the propagation delay are determined in advance; The phase advance rate per unit time is determined based on the cycle duration of the current cutting cycle, and the upper and lower bounds of the propagation delay are converted into the minimum phase shift and the maximum phase shift. The maximum phase shift is compensated based on the continuous phase width of the previous abnormal segment and the preset width compensation value. Starting from the end phase position of the previous abnormal segment, the phase migration interval of the next monitoring source is obtained by mapping according to its change direction.

6. The intelligent monitoring based cable cut drift guard method of claim 5, wherein, The determination of suspected offset states based on the degree of phase preservation and chain length continuity includes: Based on the starting phase position of the candidate offset propagation chain in the current cutting cycle and the phase shift between each source, a phase inheritance corridor for the next cutting cycle is generated. In the next cutting cycle, search for inheritance segments that fall into the phase inheritance corridor and determine the degree of phase preservation based on their effective coverage length and coverage continuity; The inherited fragments are used to continue forming the current propagation chain, and the chain length continuity is determined based on the effective chain length retention result relative to the previous cutting cycle. The phase retention degree and chain length continuity are tracked in multiple consecutive cutting cycles, and a suspected offset state is determined when both continuously meet the preset continuity conditions.

7. The cable cutting deviation protection method based on intelligent monitoring according to claim 6, characterized in that, The step of outputting a freeze verification control command in the suspected offset state, enabling the system to execute the verification cycle while maintaining the cutting depth and stopping the feed, includes: Record the current cutting depth, current cutting cycle phase reference, and candidate offset propagation chain when the suspected offset state is triggered, as a reference state for freeze verification; Output a feed freeze control value to the feed actuator to set the subsequent feed increment to zero and lock the cutting depth to the current cutting depth corresponding to the reference state; Maintaining the cutting rotation, clamping, and monitoring sampling states unchanged, the system runs a preset number of verification cutting cycles under the condition of stopping the feed. Multi-source monitoring sequences and phase references are continuously collected during each verification cutting cycle, and verification propagation chains are generated according to the original abnormal fragment extraction rules and propagation chain construction rules.

8. The smart monitoring based cable cut drift guard method of claim 7, wherein, The calculation of propagation residual based on changes in the propagation chain before and after freezing includes: Align the verification propagation chain in each verification cutting cycle with the candidate offset propagation chain corresponding to the frozen verification reference state according to the monitoring source order; The common and consistent portions of the two in terms of initial phase position, monitoring source coverage order, and effective chain length are extracted as the propagation residue; Based on the propagation residue portion, the phase residue, sequence residue, and chain length residue are determined, and combined with their retention results in continuous verification cutting cycles and the number of continuous residue cycles, a propagation residue degree is formed.

9. The intelligent monitoring based cable cut drift guard method of claim 8, wherein, When the propagation residual meets the offset confirmation condition, an offset protection control command is generated based on the propagation chain start phase, inter-source propagation integrity, and propagation residual, including: Extract the starting phase position of the propagation chain that meets the offset confirmation conditions, and generate the offset danger azimuth interval by combining it with the preset azimuth extension range; The inter-source propagation integrity is determined by the proportion of the number of monitoring sources that continuously cover the propagation chain along the preset propagation relationship to the total number of monitoring sources; The offset protection level is determined based on the residual level range of the propagation residual degree and the integrity level range of the inter-source propagation integrity degree, and offset protection control commands such as load reduction and speed reduction, pause feed and retraction or terminate cutting are generated accordingly. Write the dangerous offset orientation range into the offset protection control command.

10. A system using the cable cutting offset protection method based on intelligent monitoring as described in any one of claims 1-9, characterized in that, Includes the following modules: Segment extraction module: used to acquire multi-source monitoring sequences and phase references of the cable cutting process, divide continuous cutting cycles according to the phase references and extract abnormal segments; The propagation chain construction module is used to connect abnormal segments with continuous phase in different monitoring sources based on preset propagation relationships and propagation delays, construct candidate offset propagation chains, and determine the suspected offset status based on the degree of phase preservation and chain length continuity. Freeze verification module: Used to output freeze verification control commands when the offset is suspected, so that the system can perform the verification cycle while maintaining the cutting depth and stopping the feed, and calculate the propagation residue based on the changes in the propagation chain before and after freezing; Protection control module: When the propagation residual meets the offset confirmation conditions, it generates offset protection control commands based on the propagation chain start phase, inter-source propagation integrity, and propagation residual.

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