Circular saw blade tension detection method and system based on stress change amount analysis

Abstract

The application discloses a circular saw blade tension detection method and system based on stress change amount analysis, relates to the technical field of tension detection, and comprises the following steps: acquiring a circumferential detection reference and tension detection switching information of a to-be-detected circular saw blade; forming a first detection path and a second detection path with the same start and end measurement states and different state switching execution sequences according to the tension detection switching information; performing position-by-position difference between the loading path difference and the reference path difference according to the circumferential detection reference to form path load coupling data; determining stress change amounts of corresponding circumferential detection positions based on the effective loading response; and forming tension detection information according to the circumferential distribution of the stress change amounts. The application can distinguish measurement data actually collected in the non-loading stage and the load maintaining stage, exclude false consistency caused by the misused old measurement data, and make the effective loading response more accurately represent displacement changes under the action of the tension detection load.

Description

Technical Field

[0001] This invention relates to the field of tension detection technology, and in particular to a method and system for detecting the tension of a circular saw blade based on stress change analysis. Background Technology

[0002] The tension state of a saw blade directly affects the operational stability, cutting accuracy, and performance during sawing. Current circular saw blade tension detection is gradually evolving from manual experience-based judgment to digital detection. Typically, the circular saw blade is clamped onto a detection axis, and axial yaw displacement is collected through circumferential rotation. Combined with external loading conditions, response data at various positions on the circumference are obtained. The tension distribution state of the circular saw blade is then evaluated based on the detection curve, yaw amplitude, or corresponding stress information.

[0003] Current tension testing processes typically follow a fixed sequence of operations to switch testing modes, lock readings, and perform load measurements. The test results primarily depend on the final output response value. When the execution order of the measurement state switching operations changes, even if the initial and final states of the test and the force conditions on the circular saw blade remain consistent, the output response may still differ. Furthermore, the correspondence between historical measurement data and the current loading state is difficult to directly identify from the final value, leading to a mixture of the actual loading response and the influence of the operation path, thus affecting the stability and reliability of the tension testing results. Summary of the Invention

[0004] In view of the aforementioned existing problems, the present invention is proposed.

[0005] Therefore, this invention provides a circular saw blade tension detection method based on stress change analysis to solve the problem that the order of measurement state switching affects the loading response and makes it difficult to accurately identify the effective response in circular saw blade tension detection.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: In a first aspect, the present invention provides a method for detecting the tension of a circular saw blade based on stress change analysis, comprising: acquiring a circumferential detection reference and tension detection switching information of the circular saw blade to be tested; and forming a first detection path and a second detection path with the same start and end measurement states but different execution sequences of state switching based on the tension detection switching information. Without applying a tension detection load, the first detection path and the second detection path are executed respectively to obtain the corresponding reference path response and path response source. The reference path response is then subtracted position by position according to the circumferential detection reference to form a reference path difference. The tension detection load is applied and maintained to the circular saw blade under test. The first detection path and the second detection path are executed respectively to obtain the corresponding loading path response and the path response source. The loading path difference is formed by subtracting the response of each loading path position according to the circumferential detection reference. The loading path difference and the reference path difference are subtracted position by position according to the circumferential detection reference to form path load coupling data.

[0007] The response difference is obtained by subtracting the response of the loading path corresponding to the same detection path from the response of the reference path position by position. The validity of the response difference is then judged by combining the path load coupling data and the source of the path response to form a valid loading response. Based on the effective loading response, the stress change at the corresponding circumferential detection position is determined, and tension detection information is formed according to the circumferential distribution of each stress change.

[0008] As a preferred embodiment of the circular saw blade tension detection method based on stress change analysis according to the present invention, the formation of a first detection path and a second detection path having the same start and end measurement states but different execution sequences for state switching includes: The tension detection switching information is analyzed to obtain each measurement state switching operation and the corresponding measurement state before and after the switching and the execution order. The measurement state switching operations are sequentially connected according to the execution order to form the first detection path, and the measurement start state and measurement end state are recorded. Keeping each measurement state switching operation unchanged, the execution order is adjusted according to the corresponding measurement state before and after the switch, and the measurement state switching operations are sequentially connected according to the adjusted execution order to form a second detection path from the measurement start state to the measurement end state.

[0009] As a preferred embodiment of the circular saw blade tension detection method based on stress change analysis described in this invention, wherein: the formation of the reference path difference includes: Without applying the tension detection load, the first detection path and the second detection path are executed from the same measurement start state, and after reaching the same measurement termination state, the detection response corresponding to each position is collected according to the circumferential detection reference to form the reference path response; Record the actual measurement data used when forming the reference path response and the tension detection load application state when the measurement data is collected. Associate the measurement data with the corresponding reference path response, detection path and circumferential detection position to form the path response source. According to the circumferential detection benchmark, the benchmark path response corresponding to the first detection path and the benchmark path response corresponding to the second detection path are subtracted position by position to form the benchmark path difference.

[0010] As a preferred embodiment of the circular saw blade tension detection method based on stress change analysis described in this invention, wherein: the formation of the loading path difference includes: The tension detection load is applied to and maintained on the circular saw blade to be tested. The first detection path and the second detection path are executed from the same measurement start state to the same measurement end state. The detection response is collected at the corresponding position of the reference path response according to the circumferential detection reference to form the loading path response. Record the actual measurement data used when forming the loading path response and the tension detection load application state when the measurement data is collected. Associate the measurement data with the corresponding loading path response, detection path and circumferential detection position to form the source of the path response. According to the circumferential detection benchmark, the loading path response corresponding to the first detection path and the loading path response corresponding to the second detection path are subtracted position by position to form the loading path difference.

[0011] As a preferred embodiment of the circular saw blade tension detection method based on stress change analysis described in this invention, wherein: the formation of path load coupling data includes: According to the circumferential detection benchmark, the loading path difference corresponding to the same circumferential detection position is paired with the benchmark path difference; The path load coupling amount is obtained by subtracting the paired loading path difference from the reference path difference position by position, and then the path load coupling amount is associated with the corresponding circumferential detection position to form the path load coupling data.

[0012] As a preferred embodiment of the circular saw blade tension detection method based on stress change analysis described in this invention, wherein: the formation of an effective loading response includes: Obtain the allowable measurement difference range corresponding to the path load coupling data, compare the path load coupling amount corresponding to each circumferential detection position with the allowable measurement difference range, and determine the circumferential detection position where the path load coupling amount is within the allowable measurement difference range; According to the source of the path response, the measurement data that forms the current measurement value is extracted from the reference path response and the loading path response corresponding to the circumferential detection position, and used as the corresponding current measurement input; The effective loading response is the difference between the current measurement input of the reference path response acquired during the period when the tension detection load is not applied and the current measurement input of the loading path response acquired during the period when the tension detection load is applied and maintained.

[0013] As a preferred embodiment of the circular saw blade tension detection method based on stress change analysis described in this invention, wherein: obtaining the allowable measurement difference range corresponding to the path load coupling data includes: Without applying the tension detection load, keep the clamping state and circumferential detection position of the circular saw blade under test unchanged, and repeat the first detection path and the second detection path to obtain the corresponding benchmark verification response; While applying and maintaining the tension detection load, keep the clamping state and circumferential detection position unchanged, repeat the first detection path and the second detection path, and obtain the corresponding loading verification response; According to the circumferential detection benchmark, the benchmark verification response and the benchmark path response, and the loading verification response and the loading path response corresponding to the same detection path are compared position by position to determine the response fluctuation half-width corresponding to each detection path in the unloaded state and the load holding state. Based on the response fluctuation half-width corresponding to each detection path, the allowable fluctuation half-width of the reference path difference and the loading path difference are determined respectively. The allowable fluctuation half-widths of the reference path difference and the loading path difference corresponding to each circumferential detection position are added together to determine the allowable difference range of the path load coupling amount, thus forming the allowable difference range of the measurement.

[0014] As a preferred embodiment of the circular saw blade tension detection method based on stress change analysis described in this invention, wherein: determining the stress change at the corresponding circumferential detection position includes: Obtain a calibrated circular saw blade with the same specifications as the circular saw blade to be tested, obtain the calibration loading response of each calibrated circular saw blade under tension detection load conditions, and obtain the calibration stress change corresponding to each calibration loading response to form a calibration correspondence. Based on the calibration correspondence, the effective loading response is compared with each of the calibration loading responses corresponding to the same circumferential detection position to determine the corresponding calibration response range; Based on the adjacent calibration loading responses that constitute the calibration response interval and the corresponding calibration stress changes, the effective loading response is converted to obtain the stress change at the corresponding circumferential detection position.

[0015] As a preferred embodiment of the circular saw blade tension detection method based on stress change analysis described in this invention, wherein: the generation of tension detection information includes: Based on the circumferential detection benchmark, each stress change is associated with the corresponding circumferential detection position to form a circumferential stress change distribution. The stress changes corresponding to adjacent circumferential detection positions are compared along the circumferential detection reference to determine the magnitude and direction of change between each adjacent circumferential detection position. The magnitude and direction of change are then associated with the circumferential stress change distribution to form the tension detection information.

[0016] Secondly, the present invention provides a circular saw blade tension detection system based on stress change analysis, including a path construction module for acquiring the circumferential detection reference and tension detection switching information of the circular saw blade to be tested, and forming a first detection path and a second detection path with the same start and end measurement states but different execution sequences of state switching based on the tension detection switching information. The reference response module is used to execute the first detection path and the second detection path respectively when no tension detection load is applied, obtain the corresponding reference path response and path response source, and calculate the difference of each reference path response position by position according to the circumferential detection reference to form a reference path difference; The loading response module is used to apply and maintain the tension detection load on the circular saw blade under test, execute the first detection path and the second detection path respectively, obtain the corresponding loading path response and path response source, and calculate the difference of each loading path response position by position according to the circumferential detection reference to form a loading path difference. The path coupling module is used to calculate the difference between the loading path difference and the reference path difference at each position according to the circumferential detection reference, thereby forming path load coupling data. The effective response module is used to subtract the response of the loading path corresponding to the same detection path from the response of the reference path position by position to obtain the response difference value, and to judge the validity of the response difference value by combining the path load coupling data and the source of the path response to form an effective loading response; The tension detection module is used to determine the stress change at the corresponding circumferential detection position based on the effective loading response, and to form tension detection information based on the circumferential distribution of each stress change.

[0017] The beneficial effects of this invention are as follows: By combining path load coupling data and path response sources, the effectiveness of the response difference between the loading path response and the reference path response of the same detection path can be judged. This can identify the difference in loading response increment caused by the order of measurement state switching at each circumferential detection position, and distinguish between the actual measurement data collected in the unloaded stage and the load holding stage. It can also eliminate false consistency caused by the misuse of old measurement data in the current response, so that the formed effective loading response can more accurately characterize the displacement change under the action of tension detection load, and improve the consistency, stability and reliability of the circular saw blade tension detection data. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a flowchart of a circular saw blade tension detection method based on stress change analysis.

[0020] Figure 2 This is a schematic diagram of a circular saw blade tension detection system based on stress change analysis.

[0021] Figure 3 A flowchart for generating a valid loading response.

[0022] Figure 4 This is a flowchart for tension detection information. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0026] Reference Figures 1-4 As one embodiment of the present invention, this embodiment provides a method for detecting the tension of a circular saw blade based on stress change analysis, comprising the following steps: S1: Obtain the circumferential detection reference and tension detection switching information of the circular saw blade to be tested. Based on the tension detection switching information, form a first detection path and a second detection path with the same start and end measurement states but different execution sequences of state switching.

[0027] S1.1: Parse the tension detection switching information, obtain each measurement state switching operation and the corresponding measurement state before and after the switching and the execution order, connect each measurement state switching operation in sequence according to the execution order to form the first detection path, and record the measurement start state and measurement end state.

[0028] Acquire the detection reading lock operation, tension detection mode switching operation, and detection reading recovery operation during the tension detection process, record the measurement status before and after the switching operation and the execution sequence corresponding to each measurement state switching operation, and form tension detection switching information.

[0029] The measurement status includes detection mode and detection reading status. The detection mode includes end jump detection mode and tension detection mode. The detection reading status includes detection reading open status and detection reading locked status.

[0030] The circular saw blade to be tested is installed on the positioning spacer of the measuring shaft and held in place by the clamping flange. A circumferential reference mark is set on the surface of the circular saw blade to be tested, and the corresponding angular position is taken as the zero angle. The rotation direction is recorded with the zero angle as the starting point. The detection radius is recorded according to the radial distance between the detection position and the center of the measuring shaft. The circumferential detection positions are recorded along the detection circumference. The zero angle, rotation direction, detection radius and circumferential detection positions are associated to form a circumferential detection reference.

[0031] Both the benchmark test and the loading test are based on the circumferential test benchmark to locate the corresponding material position, and the zero angle, rotation direction and test radius are kept unchanged during the same test.

[0032] The application and removal of the tension detection load only change the stress state of the circular saw blade under test, and are not included in the measurement state switching operation that adjusts the execution order between the first detection path and the second detection path.

[0033] The detection reading lock operation switches the detection reading status from the detection reading open state to the detection reading locked state, keeping the current detection reading locked and maintaining the correspondence between the measurement data that formed the current detection reading and the current detection mode; the tension detection mode switch operation switches the detection mode from the end jump detection mode to the tension detection mode, maintaining the current detection reading status and the correspondence between the measurement data that formed the current detection reading; the detection reading restore operation restores the detection reading status from the detection reading locked state to the detection reading open state, allowing the current detection reading to be updated and simultaneously updating the correspondence between the measurement data that formed the current detection reading, maintaining the tension detection mode.

[0034] Before executing the first detection path, adjust the detection mode to end-jump detection mode and adjust the detection reading status to the detection reading open state.

[0035] According to the execution order in the tension detection switching information, the detection reading lock operation, tension detection mode switching operation, and detection reading recovery operation are executed sequentially, so that the measurement state is switched sequentially from end jump detection mode and detection reading open state to end jump detection mode and detection reading locked state, tension detection mode and detection reading locked state, and finally reaches tension detection mode and detection reading open state, forming the first detection path.

[0036] Record the end jump detection mode with the detection reading open as the measurement start state, and the tension detection mode with the detection reading open as the measurement end state. Also record the execution order of each measurement state switching operation in the first detection path and the corresponding measurement states before and after the switching.

[0037] It should be noted that the first detection path maintains the original execution order in the tension detection switching information, and records the execution order of each measurement state switching operation in the first detection path as the detection path corresponding to the subsequent loading response value.

[0038] S1.2: Keep all the measurement state switching operations unchanged, adjust the execution order according to the corresponding measurement state before and after the switch, and connect all the measurement state switching operations in sequence according to the adjusted execution order to form a second detection path from the measurement start state to the measurement end state.

[0039] Keep the state changes corresponding to the detection reading lock operation, tension detection mode switching operation, and detection reading recovery operation unchanged. Establish the state connection relationship between operations based on the measurement states before and after the switching operation. Under the condition of keeping the measurement start state and measurement end state unchanged, adjust the tension detection mode switching operation before the detection reading lock operation and keep the detection reading recovery operation after the detection reading lock operation, thus forming the adjusted execution order of the tension detection mode switching operation, detection reading lock operation, and detection reading recovery operation.

[0040] Before executing the second detection path, restore the detection mode to end jump detection mode and restore the detection reading status to detection reading open state, so that the current measurement status is consistent with the measurement start state; execute the three measurement status switching operations in sequence according to the adjusted execution order, so that the measurement status changes from end jump detection mode and detection reading open state to tension detection mode and detection reading open state, tension detection mode and detection reading locked state, and finally reaches tension detection mode and detection reading open state, thus forming the second detection path.

[0041] It should be noted that the second detection path maintains the same measurement state switching operation, measurement start state, and measurement end state as the first detection path, and forms a path order comparison basis corresponding to the first detection path by changing the execution order of the measurement state switching operation.

[0042] S2: Without applying a tension detection load, execute the first detection path and the second detection path respectively to obtain the corresponding reference path response and path response source, and subtract each reference path response position by position according to the circumferential detection reference to form a reference path difference; S2.1: Without applying the tension detection load, execute the first detection path and the second detection path from the same measurement start state, and after reaching the same measurement termination state, collect the detection response corresponding to each position according to the circumferential detection reference to form the reference path response.

[0043] Keep the clamping position, zero angle, rotation direction and detection radius of the circular saw blade under test unchanged, so that the push arm and the circular saw blade under test are kept in an unloaded state, and confirm that the tension detection load is in an unloaded state based on the feedback of the loading status of the tension application device.

[0044] Position each circumferential detection position sequentially according to the circumferential detection reference. At each circumferential detection position, keep the detection radius, the clamping position of the circular saw blade to be tested, and the unloaded state unchanged. Before executing the first detection path and the second detection path, restore the detection mode to the end jump detection mode and restore the detection reading status to the detection reading open state, so that the current measurement state reaches the measurement start state.

[0045] After each detection path reaches the measurement termination state, wait for the current detection reading to be updated, read the updated current detection reading, obtain the corresponding axial yaw displacement, and form the reference path response corresponding to the first detection path and the second detection path respectively; the second detection path adopts the same positive displacement direction, displacement zero point and displacement conversion parameters as the first detection path.

[0046] S2.2: Record the actual measurement data used when forming the reference path response and the tension detection load application state when the measurement data is collected. Associate the measurement data with the corresponding reference path response, detection path and circumferential detection position to form the path response source.

[0047] During the axial yaw displacement acquisition process, each measurement data in the same detection task is assigned a unique sample number according to the acquisition sequence, and the acquisition time, circumferential detection position, detection radius and tension detection load application status corresponding to each measurement data are recorded simultaneously; when each measurement data participates in the current detection reading update, the corresponding sample number is recorded simultaneously as the data source identifier of the current detection reading.

[0048] During the period when the test reading is locked, the correspondence between the current test reading and the data source identifier remains unchanged; after the test reading is restored and updated, the data source identifier is updated synchronously based on the measurement data that participated in the update of the current test reading.

[0049] Based on the data source identifiers of the reference path responses corresponding to the first and second detection paths, the corresponding sample numbers are read, and the measurement data of the current detection reading is located based on the sample numbers. The measurement data, along with the corresponding acquisition time, circumferential detection position, detection radius, and tension detection load application state, are associated with the corresponding reference path response, detection path, and circumferential detection position to form the path response source corresponding to each detection path.

[0050] S2.3: According to the circumferential detection reference, the reference path response corresponding to the first detection path and the reference path response corresponding to the second detection path are subtracted position by position to form the reference path difference.

[0051] Based on the circumferential detection benchmark, the first detection path benchmark response and the second detection path benchmark response corresponding to the same circumferential detection position are paired, and the corresponding detection radius and circumferential detection position are verified to be consistent.

[0052] For a complete pair of reference path responses, the reference path response corresponding to the first detection path is subtracted from the reference path response corresponding to the second detection path to obtain the reference path difference for the corresponding circumferential detection position. The direction of the subtraction does not change with the actual execution order of the first and second detection paths.

[0053] The circumferential detection position lacking any reference path response is not subtracted; each reference path difference is associated with and saved with the corresponding circumferential detection position, the reference path response of the first detection path, the reference path response of the second detection path, and the source of the corresponding path response.

[0054] S3: Apply and maintain the tension detection load to the circular saw blade under test, execute the first detection path and the second detection path respectively, obtain the corresponding loading path response and path response source, and calculate the difference of each loading path response position by position according to the circumferential detection benchmark to form the loading path difference.

[0055] S3.1: Apply and maintain the tension detection load on the circular saw blade to be tested, execute the first detection path and the second detection path from the same measurement start state to the same measurement end state, and collect the detection response at the corresponding position of the reference path response according to the circumferential detection reference to form the loading path response.

[0056] Keep the clamping position, zero angle, rotation direction and detection radius of the circular saw blade under test unchanged, position it according to the circumferential detection reference to the circumferential detection position corresponding to the reference path response, and make the loading position of the top-out force arm and the detection position on the same detection circumference, while keeping the installation position of the top-out force arm relative to the measuring axis unchanged.

[0057] Set the air supply conditions according to the working air pressure of the tension application device, drive the top arm to contact the circular saw blade under test and apply the tension detection load; after confirming that the top arm has completed the loading and maintained the loading contact, record the tension detection load application status and the loading start time.

[0058] The air supply setting, loading position, and loading contact state are used as the tension detection load conditions. The tension detection load conditions and the clamping position of the circular saw blade to be tested remain unchanged during the execution of the first and second detection paths.

[0059] The air supply setting is determined based on the working conditions of the tension application device and the stability of the load contact, and the air supply setting, load application position and load contact state are kept consistent in the same test task and corresponding calibration process; the air supply setting is saved as a load control condition and the air supply pressure is not used as the actual force value borne by the circular saw blade under test.

[0060] Switching between detection modes and detection reading states does not remove the tension detection load. The loading path response uses the same positive displacement direction, zero displacement point, displacement conversion parameters, and displacement unit as the reference path response, and records the axial runout displacement that is not subtracted from the reference path response; switching detection modes does not reset the zero displacement point, nor does it overwrite the already saved reference path response.

[0061] Stop rotating the circular saw blade under test at the circumferential detection position, restore the detection mode and detection reading status to the measurement start state, and execute the first detection path; after reaching the measurement termination state and being confirmed by status feedback, wait for the current detection reading to be updated, read the updated current detection reading, obtain the corresponding axial runout displacement, record it as the loading path response corresponding to the first detection path, and save the sample number that forms the current detection reading.

[0062] Maintaining the circumferential detection position, the clamping position of the circular saw blade to be tested, and the tension detection load conditions unchanged, the system returns to the initial measurement state and executes the second detection path. After reaching the measurement termination state and receiving confirmation from the status feedback, the loading path response corresponding to the second detection path is obtained in the same manner, and the sample number forming the current detection reading is saved. Both the first and second detection paths use the measurement termination status feedback as the basis for reading the detection reading.

[0063] After completing the loading path response acquisition at the current circumferential detection position, maintain the tension detection load and sequentially position to the remaining circumferential detection positions according to the circumferential detection reference. Execute the first and second detection paths from the measurement start state respectively to obtain the corresponding loading path responses.

[0064] When the tension detection load is interrupted or released, record the end time of load holding and stop obtaining the loading path response; when the clamping position of the circular saw blade under test changes, stop matching the reference path response under the original clamping position with the loading path response obtained after the clamping position change.

[0065] S3.2: Record the actual measurement data used when forming the loading path response and the tension detection load application state when the measurement data is collected. Associate the measurement data with the corresponding loading path response, detection path and circumferential detection position to form the path response source.

[0066] During the axial yaw displacement acquisition process, sample numbers are assigned to newly acquired measurement data according to the numbering method in S2.2, and the acquisition time, circumferential detection position, detection radius, and tension detection load application status are recorded simultaneously. The sample number is bound to the corresponding measurement data and is not reassigned due to detection mode switching, detection reading locking, or detection reading recovery.

[0067] The acquisition time of the measurement data and the loading record use the same timing reference. The tension detection load application state at the time of each measurement data acquisition is marked according to the loading start time, the load holding end time and the loading contact maintenance record. Measurement data acquired before the loading starts, during the load holding interruption and after the loading is released are not recorded as measurement data during the load holding period.

[0068] When forming a loading path response, the actual measurement data used is located according to the sample number corresponding to the current detection reading, and the acquisition time, circumferential detection position, detection radius and tension detection load application state corresponding to the measurement data are associated with the corresponding loading path response and detection path to form the path response source corresponding to the first detection path and the second detection path.

[0069] When the loading path response actually uses the measurement data collected before the loading starts, the corresponding sample number, collection time, and tension detection load application state are retained, and the source of measurement data and load state record are not changed because the loading path response is formed while the load is in a loading state.

[0070] S3.3: Based on the circumferential detection benchmark, the loading path response corresponding to the first detection path and the loading path response corresponding to the second detection path are subtracted position by position to form the loading path difference.

[0071] Based on the circumferential detection benchmark, the first detection path loading path response and the second detection path loading path response corresponding to the same circular saw blade under test, the same detection radius, and the same circumferential detection position are paired. The position correspondence follows the zero angle, rotation direction, and circumferential detection position when the benchmark path difference is formed.

[0072] For a complete paired loading path response, the loading path response corresponding to the first detection path is subtracted from the loading path response corresponding to the second detection path, and the difference is calculated position by position to obtain the loading path difference for the corresponding circumferential detection position. The loading path difference and the reference path difference adopt the same detection path subtraction direction, and the difference direction is not changed by the actual acquisition sequence.

[0073] If any loading path response is missing, the detection radius is inconsistent, or the circumferential detection position does not correspond, the loading path difference is not calculated for the corresponding position; each loading path difference is associated with and saved with the corresponding circumferential detection position, the loading path response of the first detection path, the loading path response of the second detection path, and the source of the path response.

[0074] S4: Based on the circumferential detection benchmark, the loading path difference and the benchmark path difference are subtracted position by position to form path load coupling data.

[0075] S4.1: Based on the circumferential detection reference, pair the loading path difference corresponding to the same circumferential detection position with the reference path difference.

[0076] According to the circumferential detection position in the circumferential detection reference, the reference path difference and the loading path difference are matched position by position, and the detection radius and circumferential detection position of the corresponding position are checked; when the detection radius and the circumferential detection position are consistent, the corresponding reference path difference and the loading path difference are paired.

[0077] Both the baseline path difference and the loading path difference are calculated by subtracting the response of the second detection path from the response of the first detection path. The difference directions of the two types of path differences corresponding to the completion position are checked to ensure that the baseline path difference and the loading path difference maintain the same detection path difference relationship.

[0078] The path difference pairing for each circumferential detection position is completed sequentially according to the circumferential detection reference. If the reference path difference or the loaded path difference is missing, or if the corresponding detection radius and circumferential detection position are inconsistent, the corresponding circumferential detection position will not form a path difference pairing.

[0079] S4.2: Subtract the difference between the paired loading path difference and the reference path difference position by position to obtain the path load coupling amount of the corresponding circumferential detection position, and associate each path load coupling amount with the corresponding circumferential detection position to form the path load coupling data.

[0080] For each paired circumferential detection position, the path load coupling amount of the corresponding circumferential detection position is obtained by subtracting the reference path difference from the loading path difference in the subtractive direction.

[0081] The difference between the loading path response of the first detection path and the reference path response forms the loading response increment of the first detection path, and the difference between the loading path response of the second detection path and the reference path response forms the loading response increment of the second detection path. Since both the loading path difference and the reference path difference are calculated by subtracting the corresponding response of the second detection path from the corresponding response of the first detection path, the path load coupling amount represents the difference between the loading response increment of the first detection path and the loading response increment of the second detection path.

[0082] The calculations for each circumferential detection position are completed in the same differential direction. The path load coupling amount is then associated with the corresponding circumferential detection position, the reference path difference, and the loading path difference to form path load coupling data.

[0083] S5: The response difference between the loading path response and the reference path response corresponding to the same detection path is calculated position by position to obtain the response difference value. The validity of the response difference value is judged by combining the path load coupling data and the path response source to form a valid loading response.

[0084] S5.1: Obtain the measurement allowable difference range corresponding to the path load coupling data, compare the path load coupling amount corresponding to each circumferential detection position with the measurement allowable difference range, and determine the circumferential detection position where the path load coupling amount is within the measurement allowable difference range.

[0085] For each circumferential detection position corresponding to the path load coupling data, keep the clamping state, zero angle, detection radius and current circumferential detection position of the circular saw blade under test unchanged, release the tension detection load, and stop the top arm from applying load to the circular saw blade under test.

[0086] Without applying a tension load, the detection mode is restored to end-jump detection mode, and the detection reading status is restored to the open detection reading state. The first detection path is then repeated from the measurement start state. Each time the first detection path reaches the measurement termination state, the axial runout displacement formed by this first detection path is obtained according to the reading method of the reference path response, forming the reference verification response corresponding to the first detection path.

[0087] The second detection path is executed repeatedly in the same manner. After each second detection path reaches the measurement termination state, the axial runout displacement formed in this second detection path is obtained, forming the benchmark verification response corresponding to the second detection path. Each execution of the detection path generates independent measurement data, and repeated readings of the same detection reading are not recorded as new benchmark verification responses.

[0088] After completing the baseline verification response acquisition, keep the clamping state, zero angle, detection radius and current circumferential detection position of the circular saw blade under test unchanged, and reapply and maintain the tension detection load according to the loading conditions of S3.1.

[0089] With the tension detection load applied and maintained, the detection mode is restored to the end-jump detection mode, and the detection reading status is restored to the detection reading open state. The first detection path is then repeated from the measurement start state. Each time the first detection path reaches the measurement termination state, the axial runout displacement formed by the first detection path is obtained according to the loading path response reading method, forming the loading verification response corresponding to the first detection path.

[0090] The second detection path is executed repeatedly in the same manner. Each time the second detection path reaches the measurement termination state, the axial yaw displacement formed by the second detection path is obtained, and the loading verification response corresponding to the second detection path is formed.

[0091] The baseline verification response and the loading verification response are executed the same number of times. The number of times of execution is determined based on the response fluctuation of the detection device when performing repeated measurements under the same measurement conditions. It is fixed before the current detection task begins to obtain the verification response and remains consistent at each circumferential detection position. The number of times of execution is not temporarily increased or decreased based on the value of the verification response.

[0092] Based on the circumferential detection benchmark, at each circumferential detection position, the benchmark verification response corresponding to the same detection path is subtracted from the corresponding benchmark path response, and the maximum absolute value of each difference is taken as the response fluctuation half-width of the corresponding detection path in the unloaded state, to cover the actual response fluctuations that occur under the current repeated detection conditions. The loading verification response corresponding to the same detection path is subtracted from the corresponding loading path response, and the response fluctuation half-width of the corresponding detection path in the load-holding state is formed in the same way, and is expressed as follows: ; in, This represents the response fluctuation half-width corresponding to the first detection path in the unloaded state; This represents the baseline verification response obtained for the kth time along the first detection path at the corresponding circumferential detection position; This indicates the baseline path response corresponding to the first detection path at the corresponding circumferential detection position; This indicates the index of circumferential detection positions arranged according to the circumferential detection reference. This indicates the sequence number of the verification response generated by repeated executions at the same circumferential detection location and along the same detection path. This indicates the state where no tension detection load is applied.

[0093] ; in, This indicates the response fluctuation half-width corresponding to the second detection path in the unloaded state; This represents the baseline verification response obtained for the kth time along the second detection path at the corresponding circumferential detection position; This indicates the baseline path response corresponding to the second detection path at the corresponding circumferential detection position.

[0094] ; in, This represents the half-width of the response fluctuation corresponding to the first detection path under load holding conditions. This represents the loading verification response obtained for the kth time along the first detection path at the corresponding circumferential detection position; This indicates the loading path response corresponding to the first detection path at the corresponding circumferential detection position; This indicates the state of applying and maintaining a tension detection load.

[0095] ; in, This represents the half-width of the response fluctuation corresponding to the second detection path under load holding conditions; This represents the loading verification response obtained for the kth time along the second detection path at the corresponding circumferential detection position; This indicates the loading path response corresponding to the second detection path at the corresponding circumferential detection position.

[0096] Based on the response fluctuation half-widths formed by the first and second detection paths in the unloaded state, the allowable fluctuation half-width of the baseline path difference is determined; based on the response fluctuation half-widths formed by the first and second detection paths in the load-held state, the allowable fluctuation half-width of the loaded path difference is determined, respectively expressed as: ; in, This indicates the allowable fluctuation half-width of the reference path difference at the corresponding circumferential detection position.

[0097] ; in, This indicates the allowable fluctuation half-width of the loading path difference at the corresponding circumferential detection position.

[0098] The baseline path difference is formed by subtracting the baseline path response of the second detection path from the baseline path response of the first detection path. The loading path difference is formed by subtracting the loading path response of the second detection path from the loading path response of the first detection path. The allowable fluctuation half-width of the two types of path differences is formed by adding the response fluctuation half-widths of the corresponding two detection paths.

[0099] The path load coupling amount is formed by subtracting the reference path difference from the loading path difference. The allowable half-width of the reference path difference fluctuation is added to the allowable half-width of the loading path difference fluctuation to obtain the allowable difference amplitude of the path load coupling amount, expressed as: ; in, This indicates the allowable difference in path load coupling magnitude at the corresponding circumferential detection position.

[0100] The negative value of the allowable difference amplitude of the path load coupling is used as the lower boundary, and the positive value of the allowable difference amplitude of the path load coupling is used as the upper boundary, forming the allowable measurement difference range for the corresponding circumferential detection position, expressed as: ; in, This indicates the allowable range of measurement differences for the corresponding circumferential detection position.

[0101] The allowable measurement difference ranges corresponding to each circumferential detection position are formed using the same method. The path load coupling amount in the path load coupling data is then compared with the allowable measurement difference ranges corresponding to the same circumferential detection position.

[0102] When the path load coupling amount is between the lower and upper boundaries of the corresponding allowable measurement difference range, the corresponding circumferential detection position is determined as the circumferential detection position where the path load coupling amount is within the allowable measurement difference range; when the path load coupling amount is lower than the lower boundary of the allowable measurement difference range or higher than the upper boundary of the allowable measurement difference range, the range comparison status of the corresponding circumferential detection position is recorded.

[0103] S5.2: According to the path response source, extract the measurement data that forms the current measurement value from the reference path response and the loading path response corresponding to the circumferential detection position, respectively, and use them as the corresponding current measurement input.

[0104] For circumferential detection positions where the path load coupling is within the allowable measurement difference range, the measurement data of the reference path response and the current measured value of the loaded path response corresponding to the actual formation of the first and second detection paths are located according to the sample number, based on the source of the path response, and are used as the current measurement inputs corresponding to the respective path responses.

[0105] Each current measurement input retains the corresponding sample number, acquisition time, circumferential detection position, detection radius, and tension detection load application status; the tension detection load application status adopts the status record saved when the measurement data is actually acquired, and is not changed based on the name of the reference path response or loading path response.

[0106] S5.3: The difference between the current measurement input of the reference path response acquired during the period when the tension detection load is not applied and the current measurement input of the loading path response acquired during the period when the tension detection load is applied and maintained is taken as the effective loading response.

[0107] Based on the circumferential detection benchmark, the loading path response corresponding to the same circumferential detection position and the same detection path is paired with the benchmark path response, and the response difference is formed by subtracting the benchmark path response from the loading path response.

[0108] Based on the path response source, verify the current measurement inputs corresponding to the first detection path and the second detection path respectively; if the current measurement inputs of the reference path responses corresponding to the first detection path and the second detection path are both collected during the period when the tension detection load is not applied, and the current measurement inputs of the corresponding loading path responses are both collected during the period when the tension detection load is applied and maintained, record the corresponding circumferential detection position as meeting the path response source requirements.

[0109] The first detection path is formed according to the execution order recorded in the tension detection switching information, and serves as the response value retrieval path for the current detection task; the second detection path is formed by adjusting the execution order while keeping the measurement state switching operation, measurement start state, and measurement termination state unchanged, and serves as the verification path for the impact of changes in the order of state switching execution on the loading response.

[0110] When the path load coupling is within the allowable difference range of the corresponding measurement, and the corresponding circumferential detection position meets the path response source requirement, the response difference corresponding to the first detection path is taken as the effective loading response of the corresponding circumferential detection position, expressed as: ; in, This indicates the valid loading response for the corresponding circumferential detection position.

[0111] If the path load coupling is within the allowable measurement range, but the corresponding circumferential detection position does not meet the path response source requirements, no effective loading response will be formed; the formed effective loading response will be associated with the corresponding circumferential detection position.

[0112] S6: Determine the stress change at the corresponding circumferential detection position based on the effective loading response, and form tension detection information according to the circumferential distribution of each stress change.

[0113] S6.1: Obtain a calibrated circular saw blade with the same specifications as the circular saw blade to be tested, obtain the calibration loading response of each calibrated circular saw blade under tension detection load conditions, and obtain the calibration stress change corresponding to each calibration loading response to form a calibration correspondence.

[0114] Select multiple calibrated circular saw blades of the same specifications, and establish a circumferential testing benchmark consistent with the circular saw blade to be tested. Determine the zero angle, rotation direction, testing radius, and circumferential testing positions of each calibrated circular saw blade. Ensure that each calibrated circular saw blade and the circular saw blade to be tested use the same clamping method, testing radius, circumferential testing position, and tension testing load conditions, and use the same positive displacement direction, zero displacement point, and displacement conversion parameters.

[0115] At each circumferential detection position, the response difference corresponding to each calibrated circular saw blade is obtained according to the formation method of the effective loading response. The response difference retained after path load coupling comparison and path response source verification is recorded as the corresponding calibration loading response. The calibration loading response is used to characterize the loading deformation response formed by the corresponding calibrated circular saw blade under the uniform tension detection load condition.

[0116] When the circular saw blade specifications, clamping state, circumferential detection position, and tension detection load conditions are consistent, the calibration loading response reflects the difference in loading deformation at the corresponding circumferential detection position under a uniform load, and establishes a corresponding relationship with the calibration stress change at that circumferential detection position.

[0117] Without applying a tension test load, the circumferential stress of the surface evaluation area corresponding to each calibrated circular saw blade at each circumferential test position was measured by X-ray diffraction. The reference circumferential stress of the surface evaluation area corresponding to the same circumferential test position of the fixed reference circular saw blade was obtained under the same measurement conditions.

[0118] Each surface evaluation area uses the corresponding circumferential detection position and detection radius as the location positioning reference.

[0119] Each calibrated circular saw blade has the same specifications as the fixed reference circular saw blade, and uses the same evaluation surface, circumferential measurement direction, and measurement position. In the process of establishing the same calibration correspondence, the same fixed reference circular saw blade is used, and the reference circumferential stress corresponding to each circumferential detection position of the fixed reference circular saw blade is used as a unified stress reference benchmark for establishing the stress change of each calibration.

[0120] The difference between the calibrated circular stress of the circular saw blade at the same circumferential detection position and the reference circumferential stress of the fixed reference circular saw blade is used to obtain the corresponding change in calibrated stress.

[0121] The calibration stress change represents the difference between the circumferential stress of the calibrated circular saw blade at the corresponding circumferential detection position and the reference circumferential stress of the fixed reference circular saw blade at the same circumferential detection position. The positive or negative sign of the difference is retained and used to establish a calibration correspondence with the corresponding calibration loading response.

[0122] The stress change obtained by converting the circular saw blade under test through the calibration correspondence is based on a unified stress reference standard consistent with the calibrated stress change.

[0123] Based on the circumferential detection position, the calibration loading response obtained from the same calibrated circular saw blade is correlated with the corresponding calibration stress change to form calibration nodes; The calibration nodes formed by each calibrated circular saw blade at the same circumferential detection position are collected. The calibration nodes with the same calibration load response value are identified. The calibration nodes whose calibration load response values ​​can be distinguished from each other are saved according to the correspondence relationship. The calibration correspondence relationship of the corresponding circumferential detection position is established by the saved calibration nodes. The calibration nodes with the same calibration load response value are not used to form the calibration response interval.

[0124] When there are fewer than two distinguishable calibration nodes at the same circumferential detection position, the corresponding circumferential detection position does not form a calibration response interval and remains in an undetermined state.

[0125] It should be noted that consistent specifications mean that the outer diameter, thickness, center hole size, and material parameters of the calibrated circular saw blade and the circular saw blade to be tested are consistent, and the clamping method, detection radius, loading position, and tension detection load conditions are also consistent, so that the calibrated circular saw blade and the circular saw blade to be tested have corresponding loading deformation responses.

[0126] S6.2: Based on the calibration correspondence, compare the effective loading response with each calibration loading response corresponding to the same circumferential detection position to determine the corresponding calibration response interval.

[0127] According to the circumferential detection position, the effective loading response is matched with each corresponding calibration loading response in the calibration correspondence, and the correlation between each calibration loading response and the corresponding calibration stress change remains unchanged.

[0128] Arrange the calibration load responses corresponding to the same circumferential detection position in ascending order of their values. Use two adjacent calibration load responses as the lower and upper boundaries, respectively, to form the calibration response interval.

[0129] The effective loading response is compared sequentially with the lower and upper boundaries of each calibration response interval. When the effective loading response is greater than the lower boundary and less than the upper boundary, the calibration response interval formed by the corresponding adjacent calibration loading responses is taken as the calibration response interval corresponding to the effective loading response.

[0130] When the effective loading response is consistent with a certain calibration loading response value, the corresponding calibration loading response is taken as the lower boundary and the next adjacent calibration loading response is taken as the upper boundary; when the corresponding calibration loading response is the maximum calibration loading response, the previous adjacent calibration loading response is taken as the lower boundary and the maximum calibration loading response is taken as the upper boundary, forming the corresponding calibration response interval.

[0131] If the effective load response is lower than the minimum calibration load response corresponding to the same circumferential detection position, or higher than the maximum calibration load response, a calibration response range is not formed, and no extension conversion outside the calibration load response range is performed.

[0132] S6.3: Based on the adjacent calibration loading responses constituting the calibration response interval and the corresponding calibration stress changes, the effective loading response is converted to obtain the stress change at the corresponding circumferential detection position.

[0133] Within the calibration response interval, the effective loading response is linearly interpolated using two adjacent calibration loading responses that constitute the calibration response interval and the corresponding calibration stress changes.

[0134] Calculate the response difference between the effective loading response and the lower boundary calibration loading response of the calibration response interval, as well as the response span between the upper boundary calibration loading response and the lower boundary calibration loading response. Use the ratio of the response difference to the response span as the interpolation ratio.

[0135] Calculate the difference between the calibrated stress change corresponding to the upper boundary calibration loading response and the calibrated stress change corresponding to the lower boundary calibration loading response. Multiply this difference in calibrated stress change by the interpolation ratio and add it to the calibrated stress change corresponding to the lower boundary calibration loading response to obtain the stress change at the corresponding circumferential detection position, expressed as: ; in, This represents the stress change calculated from the corresponding circumferential detection position; This indicates the valid loading response at the corresponding circumferential detection position; This represents the lower boundary calibration load response that constitutes the calibration response range; This represents the upper boundary calibration load response that constitutes the calibration response interval; This indicates the change in calibration stress corresponding to the lower boundary calibration loading response; This indicates the change in calibration stress corresponding to the calibration loading response at the upper boundary; This indicates the index of the calibration node in the calibration correspondence, arranged according to the calibration load response value.

[0136] The two adjacent calibration load response values ​​that constitute the calibration response interval are different, so that the response span of the calibration response interval is not zero; the effective load response corresponding to each circumferential detection position is processed by the same conversion method to obtain the stress change corresponding to each circumferential detection position.

[0137] S6.4: Associate each stress change with the corresponding circumferential detection position according to the circumferential detection benchmark to form a circumferential stress change distribution.

[0138] Arrange the circumferential detection positions according to the zero angle and rotation direction in the circumferential detection reference, and record the stress change at the corresponding circumferential detection position; circumferential detection positions lacking stress change are left in an undetermined state, and the corresponding undetermined reason is recorded.

[0139] The circumferential detection locations and corresponding stress changes are compiled according to the circumferential arrangement to form a circumferential stress change distribution.

[0140] S6.5: Compare the stress changes corresponding to adjacent circumferential detection positions along the circumferential detection reference, determine the change amplitude and direction between each adjacent circumferential detection position, and associate the change amplitude and direction with the circumferential stress change distribution to form the tension detection information.

[0141] According to the rotation direction determined by the circumferential detection benchmark, the stress change corresponding to adjacent circumferential detection positions is compared sequentially. The stress change corresponding to the next circumferential detection position along the rotation direction is subtracted from the stress change corresponding to the previous circumferential detection position. The absolute value of the difference is taken as the change range between the corresponding adjacent circumferential detection positions. When the difference is greater than zero, the change direction is recorded as increasing; when the difference is less than zero, it is recorded as decreasing; and when the difference is equal to zero, it is recorded as unchanged.

[0142] Based on the circumferential arrangement of the circumferential detection reference, the last circumferential detection position and the first circumferential detection position are taken as adjacent positions, and the corresponding change range and change direction are determined in the same way.

[0143] When any adjacent circumferential detection position lacks stress change, the corresponding change amplitude and direction remain undetermined, and the corresponding undetermined reason is recorded. Adjacent relationships are not re-established across circumferential detection positions lacking stress change.

[0144] The direction of change indicates the increase or decrease of stress change along the circumferential detection direction, but does not indicate the positive or negative value of stress change at a single circumferential detection position. The magnitude and direction of change corresponding to each adjacent circumferential detection position are associated with the circumferential stress change distribution to form tension detection information.

[0145] This embodiment also provides a circular saw blade tension detection system based on stress change analysis, including: a path construction module, used to obtain the circumferential detection reference and tension detection switching information of the circular saw blade to be tested, and based on the tension detection switching information, to form a first detection path and a second detection path with the same start and end measurement states but different execution sequences of state switching; The reference response module is used to execute the first detection path and the second detection path respectively when no tension detection load is applied, obtain the corresponding reference path response and path response source, and calculate the difference of each reference path response position by position according to the circumferential detection reference to form a reference path difference; The loading response module is used to apply and maintain a tension detection load on the circular saw blade under test, execute the first detection path and the second detection path respectively, obtain the corresponding loading path response and path response source, and calculate the difference of each loading path response position by position according to the circumferential detection reference to form a loading path difference; The path coupling module is used to calculate the difference between the loading path difference and the reference path difference at each position according to the circumferential detection reference, thereby forming path load coupling data. The effective response module is used to subtract the response of the loading path corresponding to the same detection path from the response of the reference path position by position to obtain the response difference value, and to judge the validity of the response difference value by combining the path load coupling data and the source of the path response to form an effective loading response; The tension detection module is used to determine the stress change at the corresponding circumferential detection position based on the effective loading response, and to form tension detection information based on the circumferential distribution of each stress change.

[0146] This embodiment also provides a computer device applicable to the circular saw blade tension detection method based on stress change analysis, including: a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to realize the circular saw blade tension detection method based on stress change analysis as proposed in the above embodiment.

[0147] The computer device can be a terminal, comprising a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0148] This embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the circular saw blade tension detection method based on stress change analysis as proposed in the above embodiments. The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0149] In summary, this invention, by combining path load coupling data and path response sources, effectively judges the response difference between the loaded path response and the baseline path response of the same detection path. This allows for the identification of incremental differences in the loading response caused by the order of measurement state switching at each circumferential detection position, and distinguishes between measurement data actually collected in the unloaded stage and the load holding stage. It also eliminates false consistency caused by the misuse of old measurement data in the current response, enabling the formed effective loading response to more accurately characterize the displacement change under the tension detection load, thereby improving the consistency, stability, and reliability of the circular saw blade tension detection data.

[0150] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for detecting the tension of a circular saw blade based on stress change analysis, characterized in that, include: Obtain the circumferential detection reference and tension detection switching information of the circular saw blade to be tested. Based on the tension detection switching information, form a first detection path and a second detection path with the same start and end measurement states but different execution sequences of state switching. Without applying a tension detection load, the first detection path and the second detection path are executed respectively to obtain the corresponding reference path response and path response source. The reference path response is then subtracted position by position according to the circumferential detection reference to form a reference path difference. The tension detection load is applied to and maintained on the circular saw blade to be tested. The first detection path and the second detection path are executed respectively to obtain the corresponding loading path response and the path response source. The loading path difference is formed by subtracting the response of each loading path position according to the circumferential detection reference. Based on the circumferential detection benchmark, the difference between the loading path difference and the benchmark path difference is calculated position by position to form path load coupling data; The response difference is obtained by subtracting the response of the loading path corresponding to the same detection path from the response of the reference path position by position. The validity of the response difference is then determined by combining the path load coupling data and the source of the path response to form a valid loading response. Based on the effective loading response, the stress change at the corresponding circumferential detection position is determined, and tension detection information is formed according to the circumferential distribution of each stress change.

2. The method for detecting the tension of a circular saw blade based on stress change analysis as described in claim 1, characterized in that, The formation of a first detection path and a second detection path, which have the same start and end measurement states but different execution sequences for state switching, includes: The tension detection switching information is analyzed to obtain each measurement state switching operation and the corresponding measurement state before and after the switching and the execution order. The measurement state switching operations are sequentially connected according to the execution order to form the first detection path, and the measurement start state and measurement end state are recorded. Keeping each measurement state switching operation unchanged, the execution order is adjusted according to the corresponding measurement state before and after the switch, and the measurement state switching operations are sequentially connected according to the adjusted execution order to form a second detection path from the measurement start state to the measurement end state.

3. The method for detecting the tension of a circular saw blade based on stress change analysis as described in claim 1, characterized in that, The formation of the baseline path difference includes: Without applying the tension detection load, the first detection path and the second detection path are executed from the same measurement start state, and after reaching the same measurement termination state, the detection response corresponding to each position is collected according to the circumferential detection reference to form the reference path response; Record the actual measurement data used when forming the reference path response and the tension detection load application state when the measurement data is collected. Associate the measurement data with the corresponding reference path response, detection path and circumferential detection position to form the path response source. According to the circumferential detection benchmark, the benchmark path response corresponding to the first detection path and the benchmark path response corresponding to the second detection path are subtracted position by position to form the benchmark path difference.

4. The method for detecting the tension of a circular saw blade based on stress change analysis as described in claim 1, characterized in that, The formation of the loading path difference includes: The tension detection load is applied to and maintained on the circular saw blade to be tested. The first detection path and the second detection path are executed from the same measurement start state to the same measurement end state. The detection response is collected at the corresponding position of the reference path response according to the circumferential detection reference to form the loading path response. Record the actual measurement data used when forming the loading path response and the tension detection load application state when the measurement data is collected. Associate the measurement data with the corresponding loading path response, detection path and circumferential detection position to form the source of the path response. According to the circumferential detection benchmark, the loading path response corresponding to the first detection path and the loading path response corresponding to the second detection path are subtracted position by position to form the loading path difference.

5. The method for detecting the tension of a circular saw blade based on stress change analysis as described in claim 1, characterized in that, The path load coupling data includes: According to the circumferential detection benchmark, the loading path difference corresponding to the same circumferential detection position is paired with the benchmark path difference; The path load coupling amount is obtained by subtracting the paired loading path difference from the reference path difference position by position, and then the path load coupling amount is associated with the corresponding circumferential detection position to form the path load coupling data.

6. The method for detecting the tension of a circular saw blade based on stress change analysis as described in claim 1, characterized in that, The formation of a valid loading response includes: Obtain the allowable measurement difference range corresponding to the path load coupling data, compare the path load coupling amount corresponding to each circumferential detection position with the allowable measurement difference range, and determine the circumferential detection position where the path load coupling amount is within the allowable measurement difference range; According to the source of the path response, the measurement data that forms the current measurement value is extracted from the reference path response and the loading path response corresponding to the circumferential detection position, and used as the corresponding current measurement input; The effective loading response is the difference between the current measurement input of the reference path response acquired during the period when the tension detection load is not applied and the current measurement input of the loading path response acquired during the period when the tension detection load is applied and maintained.

7. The method for detecting the tension of a circular saw blade based on stress change analysis as described in claim 6, characterized in that, The step of obtaining the allowable measurement difference range corresponding to the path load coupling data includes: Without applying the tension detection load, keep the clamping state and circumferential detection position of the circular saw blade under test unchanged, and repeat the first detection path and the second detection path to obtain the corresponding benchmark verification response; While applying and maintaining the tension detection load, keep the clamping state and circumferential detection position unchanged, repeat the first detection path and the second detection path, and obtain the corresponding loading verification response; According to the circumferential detection benchmark, the benchmark verification response and the benchmark path response, and the loading verification response and the loading path response corresponding to the same detection path are compared position by position to determine the response fluctuation half-width corresponding to each detection path in the unloaded state and the load holding state. Based on the response fluctuation half-width corresponding to each detection path, the allowable fluctuation half-width of the reference path difference and the loading path difference are determined respectively. The allowable fluctuation half-widths of the reference path difference and the loading path difference corresponding to each circumferential detection position are added together to determine the allowable difference range of the path load coupling amount, thus forming the allowable difference range of the measurement.

8. The method for detecting the tension of a circular saw blade based on stress change analysis as described in claim 1, characterized in that, Determining the stress change at the corresponding circumferential detection position includes: Obtain a calibrated circular saw blade with the same specifications as the circular saw blade to be tested, obtain the calibration loading response of each calibrated circular saw blade under tension detection load conditions, and obtain the calibration stress change corresponding to each calibration loading response to form a calibration correspondence. Based on the calibration correspondence, the effective loading response is compared with each of the calibration loading responses corresponding to the same circumferential detection position to determine the corresponding calibration response range; Based on the adjacent calibration loading responses that constitute the calibration response interval and the corresponding calibration stress changes, the effective loading response is converted to obtain the stress change at the corresponding circumferential detection position.

9. The method for detecting the tension of a circular saw blade based on stress change analysis as described in claim 1, characterized in that, The tension detection information includes: The stress variation is associated with the corresponding circumferential detection position according to the circumferential detection benchmark to form a circumferential stress variation distribution. The stress changes corresponding to adjacent circumferential detection positions are compared along the circumferential detection reference to determine the magnitude and direction of change between each adjacent circumferential detection position. The magnitude and direction of change are then associated with the circumferential stress change distribution to form the tension detection information.

10. A circular saw blade tension detection system based on stress change analysis, based on the circular saw blade tension detection method based on stress change analysis according to any one of claims 1 to 9, characterized in that, include: The path construction module is used to obtain the circumferential detection reference and tension detection switching information of the circular saw blade to be tested, and based on the tension detection switching information, to form a first detection path and a second detection path with the same start and end measurement states but different execution sequences of state switching. The reference response module is used to execute the first detection path and the second detection path respectively when no tension detection load is applied, obtain the corresponding reference path response and path response source, and calculate the difference of each reference path response position by position according to the circumferential detection reference to form a reference path difference; The loading response module is used to apply and maintain the tension detection load on the circular saw blade under test, execute the first detection path and the second detection path respectively, obtain the corresponding loading path response and path response source, and calculate the difference of each loading path response position by position according to the circumferential detection reference to form a loading path difference. The path coupling module is used to calculate the difference between the loading path difference and the reference path difference at each position according to the circumferential detection reference, thereby forming path load coupling data. The effective response module is used to subtract the response of the loading path corresponding to the same detection path from the response of the reference path position by position to obtain the response difference value, and to judge the validity of the response difference value by combining the path load coupling data and the source of the path response to form an effective loading response; The tension detection module is used to determine the stress change at the corresponding circumferential detection position based on the effective loading response, and to form tension detection information based on the circumferential distribution of each stress change.

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