CN116681216A - Stamping instrument safety monitoring method based on safety light curtain historical data - Google Patents
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Abstract
The invention relates to the technical field of data processing, in particular to a stamping instrument safety monitoring method based on safety light curtain historical data, which comprises the following steps: constructing a shielding judgment matrix at each moment according to the plurality of light curtain monitoring data, obtaining a plurality of shielding areas at each moment according to the shielding judgment matrix at each moment, obtaining shielding area differences at each moment according to differences of shielding areas at adjacent moments, and obtaining limb movement factors at each moment according to the shielding area differences at each moment; the safety monitoring index of each moment is obtained according to the distance between the limb movement factor of each moment and the shielding area between the adjacent moments, the safety evaluation index of each moment is obtained according to the safety monitoring index of each moment, and the safety monitoring of the punching instrument is carried out according to the safety evaluation index of each moment. The invention improves the self-adaptability, sensitivity and accuracy of the system, thereby improving the safety of the working environment.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a stamping instrument safety monitoring method based on safety light curtain historical data.
Background
A safety light curtain is a safety device commonly used in industrial environments for detecting and preventing an operator or an object from entering a dangerous area by transmitting and receiving a light signal: the light beam generated by the transmitter passes through the safety area and is received by the receiver, which processes and analyzes the received light signal to determine whether the light beam is blocked, and if it is detected that the light beam is blocked, a corresponding response action is triggered, such as stopping the machine, triggering an alarm, or performing other necessary safety measures.
However, the traditional safety light curtain is only identified safely in the process of punching equipment, and if the state perception of an operator is insufficient, potential safety hazards generated by operation fatigue of the operator cannot be accurately identified; therefore, the stamping instrument safety monitoring method based on the safety light curtain historical data is provided, the detection experience of manufacturing the corresponding components is built according to the monitored limb movement characteristics in the use and operation processes of different components through the safety light curtain, and the monitoring and updating of the limb movement are continuously carried out along with the processing process of the corresponding components, so that the active safety monitoring of the light curtain on abnormal limb movement is increased, the abnormal behaviors of operators are intelligently judged, and the accuracy of monitoring and judging is improved.
Disclosure of Invention
The invention provides a stamping instrument safety monitoring method based on safety light curtain historical data, which aims to solve the existing problems.
The stamping instrument safety monitoring method based on the safety light curtain historical data adopts the following technical scheme:
one embodiment of the invention provides a punching instrument safety monitoring method based on safety light curtain historical data, which comprises the following steps:
acquiring a plurality of light curtain monitoring data;
constructing a shielding judgment matrix at each moment according to the plurality of light curtain monitoring data, obtaining a plurality of shielding areas at each moment according to the shielding judgment matrix at each moment, obtaining shielding area differences at each moment according to differences of shielding areas at adjacent moments, and obtaining limb movement factors at each moment according to the shielding area differences at each moment;
the safety monitoring index of each moment is obtained according to the distance between the limb movement factor of each moment and the shielding area between the adjacent moments, the safety evaluation index of each moment is obtained according to the safety monitoring index of each moment, and the safety monitoring of the punching instrument is carried out according to the safety evaluation index of each moment.
Preferably, the method for constructing the shielding judgment matrix at each moment according to the plurality of light curtain monitoring data includes the following specific steps:
and marking any moment as a reference moment, taking two sets of light curtain receiving ends at the reference moment as two matrix sides, and constructing a shielding judgment matrix at the reference moment according to light curtain monitoring data corresponding to the two matrix sides.
Preferably, the method for obtaining a plurality of occlusion regions at each moment according to the occlusion decision matrix at each moment includes the following specific steps:
for any one area in any one shielding judgment matrix, if the two light curtain monitoring data of the area are 0, the area is marked as a shielding area; if only one value of the two light curtain monitoring data of the region is 0, the region is marked as a complement region; if the values of the two light curtain monitoring data of the area are not 0, the area is marked as a full visible area.
Preferably, the limb movement factor at each moment is obtained according to the difference of the shielding areas at each moment, and the specific method comprises the following steps:
any one of the moments is noted as a reference moment, in the equation,a limb movement factor representing a reference moment;the number of the time passing from the last stamping to the middle of the current stamping is represented;the number of the shielding areas at the t-1 time is represented;representing the number of shielding areas at the t-th moment;an exponential function based on a natural constant is represented.
Preferably, the method for obtaining the safety monitoring index at each moment according to the limb movement factor at each moment and the distance between the shielding areas at adjacent moments includes the following specific steps:
any one of the moments is noted as a reference moment, in the equation,safety monitoring indexes representing reference moments;representing the number of occlusion regions present in an occlusion decision matrix at a reference time;representing the distance between the center point of the jth shielding area and the center point of the (j+1) th shielding area in the shielding judgment matrix at the reference moment;a limb movement factor representing a reference moment;representing a sinusoidal integral function.
Preferably, the method for obtaining the safety evaluation index at each moment according to the safety monitoring index at each moment includes the following specific steps:
any one of the moments is noted as a reference moment, in the equation,safety evaluation indexes representing reference moments;a safety monitoring index indicating a time immediately preceding the reference time;representing the super-parameters;the standard deviation of the safety monitoring index is shown in a time closed section formed from the corresponding time of the first stamping to the reference time.
The technical scheme of the invention has the beneficial effects that: the method has the advantages that the limb movement factor is obtained through the mutual complement characteristic of the single light curtain blind area and the characteristic of the personnel limb operation stamping machine, the safety monitoring index is obtained according to the limb movement factor, the safety evaluation index is obtained according to the safety monitoring index, the self-adaptive control and response of the safety light curtain are carried out according to the safety evaluation index, the working fatigue characteristic of an operator is calculated from simple signal data by comprehensively utilizing the sensor data processing, the active safety real-time control of the stamping machine is achieved, the self-adaptability, the sensitivity and the accuracy of the system are improved, and the safety of a working environment is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the steps of the stamping instrument safety monitoring method based on the safety light curtain history data of the invention;
FIG. 2 is a schematic diagram of an occlusion decision matrix according to the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects of the stamping device safety monitoring method based on the safety light curtain history data according to the invention in combination with the accompanying drawings and the preferred embodiment. In the following description, different "one embodiment" or "another embodiment" means that the embodiments are not necessarily the same. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The following specifically describes a specific scheme of the stamping instrument safety monitoring method based on the safety light curtain history data provided by the invention with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a method for monitoring safety of a punching device based on safety light curtain history data according to an embodiment of the present invention is shown, the method includes the following steps:
step S001: and acquiring light curtain monitoring data.
It should be noted that, the conventional safety light curtain is only identified and safe in the punching process, if the state of the operator is not enough to be sensed, the potential safety hazard generated by the operation fatigue of the operator cannot be accurately identified; therefore, the embodiment provides the stamping instrument safety monitoring method based on the safety light curtain historical data, the detection experience of manufacturing the corresponding components is built according to the monitored limb movement characteristics in the use and operation processes of the different components through the safety light curtain, and the monitoring and updating of the limb movement are continuously carried out in the processing process of the corresponding components, so that the active safety monitoring of the light curtain on abnormal limb movement is increased, the abnormal behaviors of operators are intelligently judged, and the accuracy of monitoring and judging is improved.
Specifically, in order to implement the stamping instrument safety monitoring method based on the safety light curtain history data provided in this embodiment, the light curtain monitoring data needs to be collected first, and the specific process is as follows: on the punching machine tool of two sets of light curtains of two-way installation, acquire a plurality of receiver data of nearly three days light curtain, every 5 seconds is a moment, record a plurality of receiver data once, record as light curtain monitoring data, wherein light curtain gathers and is fixed frequency, punching press every time corresponds a moment, there are a plurality of light curtain monitoring data every moment, there are a plurality of receivers every light curtain receiving end, and the light curtain monitoring data quantity of every moment is unanimous with the receiver quantity, every receiver corresponds a light curtain monitoring data.
So far, the light curtain monitoring data are obtained through the method.
Step S002: and constructing a shielding judgment matrix according to the light curtain monitoring data, obtaining shielding region differences according to the shielding judgment matrix at adjacent moments, and obtaining limb movement factors according to the shielding region differences.
It should be noted that, for the intelligent light curtain system, the limb position of the user can be established through the light curtain monitoring data at the same time, and the limb movement characteristics of the processing operator are judged through time sequence accumulation when the current workpiece product is processed, so as to establish and identify the limb movement factor; when the processing operator operates for a certain period of time, the limb fatigue causes movement to deviate, and at the moment, the limb movement identification factor should be changed obviously in time, so as to trigger a safety monitoring scheme, replace the operator and ensure production safety.
It should be further noted that, since a single light curtain can only obtain the shielding judgment of the light curtain beam irradiation direction, the shielding judgment matrix can be obtained by the orthogonal light beams of the horizontal light curtain and the vertical light curtain, so that the specific area situation when the limb is shielded is shown in fig. 2, which shows a schematic diagram of the shielding judgment matrix, wherein in fig. 2, a plurality of element values exist: the element value is 2, which represents a full visible area, reflects that the area is not shielded in the two sets of light curtains, and the receiving ends of the two sets of light curtains can receive the light beams sent by the sending end; the element value is 1, which represents the complement area, reflects that one light curtain of the area is blocked, and the other light curtain is not blocked, so that the element complementation characteristic among the light curtains is achieved; the element value is 0, which represents a blocking area, and the light beams reflecting the transmitting ends of the two light curtains cannot be transmitted to the receiver in the area.
It should be further noted that different area marks exist in the synthesized shielding judgment matrix, the movement condition of the limb section can be identified according to the area change of the mark area, meanwhile, the limb movement factor is constructed by integrating the area position movement, and when the limb of the operator generates abnormal behaviors, the limb movement factor is used for analyzing to judge whether the safety strategy needs to be executed.
Specifically, taking any moment as an example, taking two sets of light curtain receiving ends at the moment as two matrix sides, wherein a plurality of receivers are arranged on each matrix side; constructing a shielding judgment matrix at the moment according to the light curtain monitoring data corresponding to the two matrix edges, wherein the shielding judgment matrix at the moment has a plurality of areas, and each area corresponds to two light curtain monitoring data; taking any area as an example, if the two light curtain monitoring data of the area are 0, the area is marked as a shielding area; if only one value of the two light curtain monitoring data of the area is 0, the area is marked as a complement area; if the values of the two light curtain monitoring data of the area are not 0, the area is marked as a full visible area. And acquiring all the complement areas at the moment, and acquiring all the complement areas at all the moment.
Further, taking an occlusion decision matrix at any time as an example; according to the occlusion judgment matrix at the moment, carrying out occlusion area analysis to obtain a limb movement factor at the moment, wherein the limb movement factor at the moment is calculated by the following steps:
in the method, in the process of the invention,a limb movement factor representing the time;the number of the time passing from the last stamping to the middle of the current stamping is represented;the number of the shielding areas at the t-1 time is represented;representing the number of shielding areas at the t-th moment;an exponential function that is based on a natural constant;the change of the area of the shielding area between adjacent moments is shown, and if the area of the shielding area is changed faster, the higher the moving speed of the limbs of the operator is, the faster the operating frequency of the operator on the punching instrument is. Wherein if the limb movement factor is smaller, the operator is indicated that the limb movement is more normal; the embodiment presets the limb movement factor at the first time to be 0. And acquiring the limb movement factors at all moments.
Thus, the limb movement factors at all moments are obtained through the method.
Step S003: and obtaining a safety monitoring index according to the limb movement factor, obtaining a safety evaluation index according to the safety monitoring index, screening the safety monitoring index according to the safety evaluation index, and carrying out safety monitoring on the punching instrument.
It should be noted that, under normal conditions, the range of the operation window of the punching apparatus is limited, and an operator needs to repeat a more standard action to achieve accurate operation; when the physical strength of the operator is full, the limb actions are more standard, but when the stamping times are increased, the physical strength of the representative operator is reduced, the standard degree of the operation actions is reduced, and after the physical strength of the operator is reduced, the actions of the limb are changed. Therefore, a safety evaluation is required according to the limb movement factor of the user's limb movement.
Specifically, taking any moment as an example, the safety monitoring index at the moment is obtained according to the limb movement factor at the moment, wherein the calculation method of the safety monitoring index at the moment is as follows:
in the method, in the process of the invention,a safety monitoring index indicating the time;indicating the number of occlusion regions present in the occlusion decision matrix at that time;representing the distance between the center point of the jth shielding area and the center point of the (j+1) th shielding area in the shielding judgment matrix at the moment;a limb movement factor representing the time;representing a sine integral function, and reflecting that the actions of limbs at two sides are possibly inconsistent and fatigue abnormality is possibly generated for operators when the distance of the shielding area is too close or only one shielding area appears after the mapping of the sine integral function. And acquiring safety monitoring indexes at all moments.
Further, taking any time as an example, the safety evaluation index of the time is obtained according to the safety monitoring index of the time immediately before the time, wherein the calculation method of the safety evaluation index of the time is as follows:
in the method, in the process of the invention,a safety evaluation index indicating the time;a safety monitoring index indicating a previous time of the time;representing superparameter, preset in this example；The standard deviation of the safety monitoring index is shown in a time closed interval formed from the corresponding time of the first stamping to the time; in this embodiment, the safety evaluation index at the first moment is preset to be 1. And acquiring safety evaluation indexes at all moments.
Further, taking any time as an example, if the safety monitoring index at the time is greater than or equal to the safety evaluation index at the time, the stamping times corresponding to the time are considered to have no abnormality; if the safety monitoring index at the moment is smaller than the safety evaluation index at the moment, the stamping times corresponding to the moment are considered to be abnormal, the control computer sends signals to related equipment, such as stopping machines, triggering alarms or executing other necessary safety measures, so as to prevent personnel or objects from entering a dangerous area, and the equipment is still continuously operated when the personnel are tired, the safety of the working environment is ensured, and the safety monitoring of the stamping equipment based on the safety light curtain historical data is completed.
In addition, after triggering the two-hand synchronous keys and before the stamping instrument completes the stamping process, the light of the light curtain is shielded, and then the emergency situation is judged, and safety measures are directly taken to stop the operation of the instrument.
This embodiment is completed.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The stamping instrument safety monitoring method based on the safety light curtain historical data is characterized by comprising the following steps of:
acquiring a plurality of light curtain monitoring data;
constructing a shielding judgment matrix at each moment according to the plurality of light curtain monitoring data, obtaining a plurality of shielding areas at each moment according to the shielding judgment matrix at each moment, obtaining shielding area differences at each moment according to differences of shielding areas at adjacent moments, and obtaining limb movement factors at each moment according to the shielding area differences at each moment;
the safety monitoring index of each moment is obtained according to the distance between the limb movement factor of each moment and the shielding area between the adjacent moments, the safety evaluation index of each moment is obtained according to the safety monitoring index of each moment, and the safety monitoring of the punching instrument is carried out according to the safety evaluation index of each moment.
2. The method for monitoring safety of a punching machine based on historical data of a safety light curtain according to claim 1, wherein the constructing the shielding judgment matrix at each moment according to the plurality of light curtain monitoring data comprises the following specific steps:
and marking any moment as a reference moment, taking two sets of light curtain receiving ends at the reference moment as two matrix sides, and constructing a shielding judgment matrix at the reference moment according to light curtain monitoring data corresponding to the two matrix sides.
3. The method for monitoring safety of a punching machine based on historical data of a safety light curtain according to claim 1, wherein the method for obtaining a plurality of shielding areas at each moment according to the shielding judgment matrix at each moment comprises the following specific steps:
for any one area in any one shielding judgment matrix, if the two light curtain monitoring data of the area are 0, the area is marked as a shielding area; if only one value of the two light curtain monitoring data of the region is 0, the region is marked as a complement region; if the values of the two light curtain monitoring data of the area are not 0, the area is marked as a full visible area.
4. The method for monitoring safety of a stamping device based on the history data of the safety light curtain according to claim 1, wherein the method for obtaining the limb movement factor at each moment according to the difference of the shielding areas at each moment comprises the following specific steps:
any one of the moments is noted as a reference moment, in the equation,a limb movement factor representing a reference moment; />The number of the time passing from the last stamping to the middle of the current stamping is represented; />The number of the shielding areas at the t-1 time is represented; />Representing the number of shielding areas at the t-th moment; />An exponential function based on a natural constant is represented.
5. The method for monitoring safety of a stamping device based on historical data of a safety light curtain according to claim 1, wherein the method for obtaining the safety monitoring index of each moment according to the distance between the limb movement factor of each moment and the shielding area between adjacent moments comprises the following specific steps:
any one of the moments is noted as a reference moment, in the equation,safety monitoring indexes representing reference moments; />Representing the number of occlusion regions present in an occlusion decision matrix at a reference time; />Representing the distance between the center point of the jth shielding area and the center point of the (j+1) th shielding area in the shielding judgment matrix at the reference moment; />A limb movement factor representing a reference moment;representing a sinusoidal integral function.
6. The method for monitoring the safety of the stamping equipment based on the historical data of the safety light curtain according to claim 1, wherein the method for obtaining the safety evaluation index of each moment according to the safety monitoring index of each moment comprises the following specific steps:
any one of the moments is noted as a reference moment, in the equation,safety evaluation indexes representing reference moments; />A safety monitoring index indicating a time immediately preceding the reference time; />Representing the super-parameters; />The standard deviation of the safety monitoring index is shown in a time closed section formed from the corresponding time of the first stamping to the reference time.
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| WO2021129487A1 (en) * | 2019-12-25 | 2021-07-01 | 华为技术有限公司 | Method and apparatus for determining position of limb node of user, medium and system |
| CN113171083A (en) * | 2021-04-30 | 2021-07-27 | 武汉体育学院 | Three-dimensional light curtain type balance analyzer and control method thereof |
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2023
- 2023-07-31 CN CN202310945237.6A patent/CN116681216A/en active Pending
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| CN106133666A (en) * | 2014-03-28 | 2016-11-16 | 精工爱普生株式会社 | Light curtain method to set up and bi-directional display device |
| US20160243419A1 (en) * | 2015-02-20 | 2016-08-25 | Precise Play, LLC | Analyzing effectiveness of game ball delivery |
| CN204614160U (en) * | 2015-04-29 | 2015-09-02 | 杭州赛加得传感器有限公司 | Safe light curtain system |
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