CN-122006169-A - Safety belt anti-falling protection monitoring method, system, equipment and medium based on ring magnetic field mutation

CN122006169ACN 122006169 ACN122006169 ACN 122006169ACN-122006169-A

Abstract

The invention discloses a safety belt anti-falling protection monitoring method, system, equipment and medium based on ring magnetic field mutation, belonging to the technical field of safety belt anti-falling protection monitoring, comprising the steps of determining a first parameter set; the method comprises the steps of setting a functional unit on a hook ring, applying a first excitation signal to measure and obtain a first magnetic field characteristic value, establishing a second mathematical model comprising the geometric structure of the hook ring and the physical properties of a ferromagnetic medium, calculating second magnetic field characteristic values under different ferromagnetic medium invasion conditions, determining a first threshold value set, applying a second excitation signal to periodically measure and obtain a third magnetic field characteristic value, calculating a first deviation characteristic value, and comparing the first deviation characteristic value with the first threshold value set to judge the hook state. The invention establishes the regression relation between the magnetic field change multiple and the fixed object parameter, determines the differential judgment threshold value of the stable contact and non-stable contact working conditions, filters transient interference through frequency statistics, and realizes accurate judgment and graded alarm of the contact state of the hanging ring.

Inventors

JI BAOXIAN
PAN YUANLIN
ZHANG BIAO
LI QINZHI
Shi Huanyang
Tian Jiangxue
YUAN CHANGYI
YU HONGZHANG

Assignees

贵州浦源工程设计有限公司

Dates

Publication Date: 20260512
Application Date: 20260130

Claims (10)

1. The safety belt anti-falling protection monitoring method based on the sudden change of the toroidal magnetic field is characterized by comprising the following steps of: Establishing a first mathematical model for representing the electromagnetic coupling relation between the excitation unit and the detection unit, and determining a first parameter set through the first mathematical model; A first functional unit and a second functional unit are arranged on the hanging ring, a first excitation signal is applied to the first functional unit according to the first parameter set, and a first magnetic field characteristic value is obtained through measurement of the second functional unit under a first working condition; Establishing a second mathematical model comprising a hook ring geometry and ferromagnetic medium physical properties, calculating second magnetic field characteristic values at detection positions under different ferromagnetic medium invasion conditions through the second mathematical model, comparing the second magnetic field characteristic values with the first magnetic field characteristic values to obtain a first association rule, and determining a first threshold set according to the first association rule; And applying a second excitation signal to the first functional unit, periodically measuring by the second functional unit to obtain a third magnetic field characteristic value, calculating a first deviation characteristic quantity of the third magnetic field characteristic value and the first magnetic field characteristic value, and comparing the first deviation characteristic quantity with the first threshold value set to judge the hook state.
2. The method for monitoring fall protection of a safety belt based on abrupt change of magnetic field of a ring of a safety belt according to claim 1, wherein the establishing a first mathematical model representing the electromagnetic coupling relation between an exciting unit and a detecting unit comprises establishing a first mathematical relation between the current of the exciting unit and the intensity of magnetic field in a hook ring; Establishing a second mathematical relationship between the magnetic field intensity in the hook ring and the magnetic field induced by the detection probe; establishing a third mathematical relationship between the induction magnetic field of the detection probe and the electric signal output by the detection unit; And cascading and coupling the first mathematical relationship, the second mathematical relationship and the third mathematical relationship to form the first mathematical model.
3. The method for monitoring fall protection of a safety belt based on sudden changes in a ring magnetic field according to claim 2, wherein the determining the first parameter set by the first mathematical model comprises: Taking the structural parameters and the excitation signal parameters of the excitation unit as parameters to be analyzed, and calculating the dual-state response characteristics of the parameters to be analyzed under the idle state and the ferromagnetic medium invasion state through the first mathematical model; performing sensitivity quantitative analysis on the dual-state response characteristic to obtain a sensitivity value of the parameter to be analyzed; Sorting the importance of the parameters according to the sensitivity values, and screening the parameters with the sensitivity values exceeding a preset judgment threshold as parameters to be optimized; Establishing an idle load detectable constraint condition and an intrusion distinguishable constraint condition for the parameters to be optimized, and carrying out multi-parameter joint optimization solution under the constraint condition to obtain a parameter feasible region; and extracting the value interval of the parameter to be optimized from the parameter feasible domain as the first parameter set.
4. The method for monitoring fall protection of a safety belt based on sudden changes of a ring magnetic field according to claim 3, wherein the determining a first set of thresholds according to the first association rule comprises: carrying out numerical solution on a plurality of groups of values of the relative magnetic permeability and the spatial position of the ferromagnetic medium to obtain a magnetic field intensity simulation data set; dividing the magnetic field intensity simulation data set into stable contact working condition data and unstable contact working condition data according to the space position; Calculating the ratio of the two working condition data to the first magnetic field characteristic value to obtain stable contact working condition change multiple data and unstable contact working condition change multiple data respectively; Establishing a regression relation with the relative permeability and the spatial position based on the change multiple data; And determining a stable contact working condition judgment threshold value and a non-stable contact working condition judgment threshold value as the first threshold value set according to the regression relation and the change multiple data.
5. The method for monitoring anti-falling protection of a safety belt based on sudden change of a ring magnetic field according to claim 4, wherein the determining the stable contact condition judgment threshold and the unstable contact condition judgment threshold according to the regression relation and the change multiple data comprises: respectively carrying out statistical analysis on the stable contact condition change multiple data and the non-stable contact condition change multiple data to obtain a distribution characteristic parameter; respectively determining safety margin coefficients according to the regression relation and the distribution characteristic parameters; respectively extracting extremum from the change multiple data; and applying the extreme value to the safety margin coefficient to obtain a judging threshold value.
6. The method for monitoring fall protection of a safety belt based on sudden changes in a ring magnetic field according to claim 5, wherein the periodically measuring to obtain a third magnetic field characteristic value comprises: triggering magnetic field measurement according to a preset time interval; transmitting the measurement signal by means of impedance matching; Performing digital filtering on the transmission signal; and extracting the filtered signal amplitude as the third magnetic field characteristic value.
7. The method for monitoring the anti-falling protection of the safety belt based on the abrupt change of the ring magnetic field according to claim 6, wherein the judging the hook state comprises: The first deviation feature quantity is compared with the stable contact working condition judgment threshold value and the non-stable contact working condition judgment threshold value in three values, the first deviation feature quantity is marked as a first state level when the first deviation feature quantity is larger than or equal to the stable contact working condition judgment threshold value, the first deviation feature quantity is marked as a second state level when the first deviation feature quantity is smaller than the stable contact working condition judgment threshold value and larger than or equal to the non-stable contact working condition judgment threshold value, and the first deviation feature quantity is marked as a third state level when the first deviation feature quantity is smaller than the non-stable contact working condition judgment threshold value; Counting the frequency of the state level marking results in the continuous preset times, and selecting the state level with the highest counting frequency as a confirmation state level; And when the confirmation state level is the first state level, monitoring and outputting no alarm, when the confirmation state level is the second state level, outputting an early warning level alarm signal, and when the confirmation state level is the third state level, outputting a danger level alarm signal.
8. The safety belt anti-falling protection monitoring system based on the sudden change of the toroidal magnetic field is applied to the safety belt anti-falling protection monitoring method based on the sudden change of the toroidal magnetic field, and is characterized by comprising a magnetic field excitation module, a magnetic field detection module and a safety belt anti-falling protection monitoring module, wherein the magnetic field excitation module is arranged on a hanging ring and is used for applying an excitation signal according to excitation parameters to establish an alternating magnetic field; the magnetic field detection module is arranged on the hook ring and used for detecting the magnetic field intensity in the hook ring; the parameter calculation module is used for establishing a mathematical model and determining excitation parameters and a judgment threshold value; the signal processing module is used for transmitting and filtering the output signal of the magnetic field detection module; The state judging module is used for calculating the magnetic field deviation amount, comparing the magnetic field deviation amount with a judging threshold value and confirming the hook state; and the alarm output module is used for outputting alarm signals according to the state of the hook.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of a safety belt fall protection monitoring method based on a sudden change of a ring magnetic field as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of a safety belt fall protection monitoring method based on a sudden change in a magnetic field of any one of claims 1 to 7.

Description

Safety belt anti-falling protection monitoring method, system, equipment and medium based on ring magnetic field mutation Technical Field The invention relates to the technical field of safety belt anti-falling protection monitoring, in particular to a safety belt anti-falling protection monitoring method, system, equipment and medium based on sudden change of a ring magnetic field. Background The reliable connection of the safety belt hook ring and the fixed object in the high-altitude operation is the key of anti-falling protection. The hanging ring is used as an opening ring structure, and the detection of the closing state of the hanging ring faces special technical problems. The visual inspection relies on manual judgment, and whether the hanging ring is completely closed can not be accurately identified in a high-altitude remote environment. The mechanical triggering type device is detected through the contact switch, but the space at the opening of the hanging ring is narrow, the mechanical switch is easily worn and is influenced by bad contact, and whether a fixed object truly passes through the central area of the hanging ring cannot be detected. The fixture has two states of stable passing and unstable passing when passing through the hanging ring. The physical characteristics of the magnetic circuit of the hook ring cannot be utilized in both visual inspection and mechanical triggering modes, stable passing and unstable passing states cannot be distinguished, and therefore falling risks in the unstable passing states cannot be early warned. Disclosure of Invention In view of the problems, the invention provides a safety belt anti-falling protection monitoring method, system, equipment and medium based on ring magnetic field mutation. Therefore, the invention solves the technical problems of how to establish an electromagnetic coupling model of a hook ring excitation unit and a detection unit to determine excitation parameters, determine a differential judgment threshold value of stable contact and unstable contact working conditions through numerical simulation of magnetic field responses in a hook ring under different invasion conditions of ferromagnetic fixed objects, and realize grading judgment and alarm of a contact state through real-time measurement of the magnetic field of the hook ring and comparison of the judgment threshold value. In order to solve the technical problems, the invention provides a safety belt anti-falling protection monitoring method based on ring magnetic field mutation, which comprises the following steps of, Establishing a first mathematical model for representing the electromagnetic coupling relation between the excitation unit and the detection unit, and determining a first parameter set through the first mathematical model; A first functional unit and a second functional unit are arranged on the hanging ring, a first excitation signal is applied to the first functional unit according to the first parameter set, and a first magnetic field characteristic value is obtained through measurement of the second functional unit under a first working condition; Establishing a second mathematical model comprising a hook ring geometry and ferromagnetic medium physical properties, calculating second magnetic field characteristic values at detection positions under different ferromagnetic medium invasion conditions through the second mathematical model, comparing the second magnetic field characteristic values with the first magnetic field characteristic values to obtain a first association rule, and determining a first threshold set according to the first association rule; And applying a second excitation signal to the first functional unit, periodically measuring by the second functional unit to obtain a third magnetic field characteristic value, calculating a first deviation characteristic quantity of the third magnetic field characteristic value and the first magnetic field characteristic value, and comparing the first deviation characteristic quantity with the first threshold value set to judge the hook state. As a preferable scheme of the safety belt anti-falling protection monitoring method based on the abrupt change of the ring magnetic field, the invention establishes a first mathematical relationship between exciting unit current and magnetic field intensity in a hanging ring; Establishing a second mathematical relationship between the magnetic field intensity in the hook ring and the magnetic field induced by the detection probe; establishing a third mathematical relationship between the induction magnetic field of the detection probe and the electric signal output by the detection unit; And cascading and coupling the first mathematical relationship, the second mathematical relationship and the third mathematical relationship to form the first mathematical model. The method for monitoring the anti-falling protection of the safety belt based on the sudden change of th