Safety early warning control method and system for lifting operation platform

Abstract

According to the safety early warning control method and system for the lifting operation platform, the false alarm probability is low. The method comprises the following steps: (1) obtaining physical appearance information of an operator, obtaining a maximum inclination angle of a trunk part, extending out of a fence, of the operator based on the height of the fence of a lifting operation platform, and defining the maximum inclination angle as a first safety threshold value; (2) based on the environment characteristics around the lifting operation platform, obtaining the maximum extending distance of the operator capable of extending out of the fence, and defining the maximum distance as a second safety threshold value; and (3) if the posture of the operator is within a range limited by the first safety threshold value and the second safety threshold value, judging that the state is a safe state, otherwise, judging that the state is an early warning state.

Description

Technical Field

[0001] The present invention relates to the field of intelligent manufacturing, and in particular to a safety early warning control method and system for a lifting work platform, which are mainly used in the coating industry. Background Art

[0002] Nowadays, intelligent production is the general trend of the entire industrial system. In addition to covering equipment directly used in the production of products, highly intelligent production also needs to cover auxiliary equipment, especially in the field of safe production. The joint cooperation of all equipment in the production workshop is the only way to build a more intelligent and safer production factory. In the coating industry, lifting equipment, as an auxiliary equipment, has higher safety requirements because of its movable operation location and the characteristics of high-altitude operations. The traditional fixed parameter monitoring and early warning of its lifting platform has a high probability of false alarms. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a safety warning control method and system for a lifting work platform, which has a low probability of false alarms.

[0004] To achieve the above object, the present invention provides the following technical solution: a safety early warning control method for a lifting work platform, characterized in that it comprises the following steps: (1) Obtaining the physical information of the operator, and based on the height of the fence of the lifting work platform, obtaining the maximum inclination angle of the torso of the operator leaning out of the fence, and defining the maximum inclination angle as a first safety threshold; (2) based on the environmental characteristics around the lifting work platform, obtaining a maximum protrusion distance that the operator can protrude from the fence, and defining the maximum distance as a second safety threshold; (3) If the posture of the operator is within the range defined by the first safety threshold and the second safety threshold, it is determined to be a safe state; otherwise, it is determined to be a warning state.

[0005] The physical appearance information of the present invention includes height, weight and body shape.

[0006] The body contour described in the present invention includes a standard body contour and a target body contour; the standard body contour specifically refers to body parameters that meet the set height, set gender and set BMI value, and each of the standard body contours has a corresponding standard mass; the target body contour is the body contour of the operator; the compensation mass can be obtained by comparing the standard body contour and the target body contour, and the predicted weight of the operator is the sum of the standard weight and the compensation mass.

[0007] The compensation mass of the present invention includes a first deviation mass and a second deviation mass; the compensation mass can be obtained by comparing the quasi-body shape contour with the target body shape contour, which specifically includes the following steps: The target body shape contour under the target height parameters and target gender parameters is compared with the standard body shape contour. For the part where the target body shape contour is larger than the standard body shape contour, the first deviation mass of the part is calculated according to a certain muscle and fat density ratio; for the part where the target body shape contour is smaller than the standard body shape contour, the second deviation mass of the part is calculated according to a certain muscle and fat density ratio.

[0008] The step (1) of the present invention specifically includes the following steps: (11) determining a leaning position on the body contour of the operator according to the fence height of the lifting work platform and the height of the operator, and obtaining a first mass of the body part above the leaning position and a second mass of the body part below the leaning position according to the body contour; (12) Calculate the maximum value of the inclination angle of the body part above the leaning position protruding from the fence based on the first mass and the second mass, that is, the maximum inclination angle.

[0009] The step (12) of the present invention specifically includes the following steps: Multiple reference parts on the body contour of the operator above the leaning position are collected, and the positions of the multiple reference parts are fitted into an inclination reference line, so that the angle between the inclination reference line and the vertical direction is the inclination angle of the body part above the leaning position protruding from the fence, and when the absolute values ​​of the moments of the first mass and the second mass about the leaning position are equal, the inclination angle in this state is judged to be the maximum inclination angle.

[0010] The step (2) of the present invention specifically includes the following steps: When the lifting work platform is in a stationary state, the distance that will not cause interference from each extension angle is obtained according to the distance between the fence corresponding to the position of the operator and the objects around the lifting work platform, that is, the maximum probe distance; when the lifting work platform is in a moving state, the distance that will not cause interference from each extension angle is obtained according to the distance between the fence corresponding to the position of the operator in the moving direction and within the first preset time, that is, the maximum probe distance.

[0011] After obtaining the physical appearance information of the operator in step (1), the present invention further includes the following steps: The physical information includes facial features. The facial features of the operator are compared with the facial features stored in the database. If the verification result is wrong, the current person is prohibited from entering the lifting work platform.

[0012] Before step (3) of the present invention, the following steps are also included: Identify the posture state of the operator, and if the posture state is standing, use the first safety threshold and the second safety threshold to determine the safety state or warning state; if the posture state is kneeling or lying, and the duration exceeds a second preset time, determine it as a warning state; After the judgment is in the warning state, the following steps are also included: Sending a first alarm message to the control room, wherein the first alarm message includes an audio and video record of the posture of the operator within a second preset time before entering the warning state; A second alarm message is sent to a first preset range around the lifting work platform, wherein the second alarm message includes identity information and posture information corresponding to the operator; after the first alarm message is responded to by the control room or the second alarm message is responded to once, the second alarm message is eliminated.

[0013] A safety warning control system for a lifting work platform, characterized by comprising a visual module, the visual module is arranged on the lifting work platform, and is used to execute the safety warning control method.

[0014] Compared with the prior art, the beneficial effects of the present invention are: by combining the specific working environment of the lifting platform and the physical characteristics of the operators, different standard warning parameters can be implemented for different personnel, realizing an intelligent one-person-one-control mode, which can significantly reduce the probability of false alarms compared to traditional fixed parameter monitoring and early warning, and also provides a technical basis for building a smart factory covering all equipment. The present invention can be applied to the transformation of old equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 An axonometric diagram of a lifting operation equipment used in an embodiment of the present invention; Figure 2 A side view of a lifting operation equipment applied in an embodiment of the present invention; Figure 3 This is a schematic diagram of an operator in an elevating work platform according to an embodiment of the present invention; Figure 4 This is a schematic diagram of calculating the first safety threshold according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] like Figure 1 and Figure 2As shown, the lifting work equipment used in the embodiment of the present invention includes a lifting work platform body 1, a lifting mechanism 2, a moving mechanism 3, a climbing mechanism 4 and a fixed work platform 5; the lifting work platform body 1 is installed on the liftable part of the lifting mechanism 2, the lifting mechanism 2 is arranged on the moving mechanism 3, and the climbing mechanism 4 is correspondingly arranged between the fixed work platform 5 and the surface of the work site, so that the operator can climb to the fixed work platform 5 to perform fixed height operations, measurements and the like. At any height on the lifting stroke of the lifting work platform body 1, when the lifting work platform body 1 moves to the lowest end of the stroke, the ground personnel can enter the lifting work platform body or leave the lifting work platform body; the moving mechanism 3 can be a wheeled load-bearing chassis, which can realize the overall movement of the safety warning control system; the lifting work platform body is provided with a visual module (not shown in the figure) for executing the safety warning control method for the lifting work platform.

[0018] The hardware of the visual module includes visual cameras, motion sensors, processors, etc., which can all be obtained through purchase. The visual camera is specifically installed on at least the lifting work platform body 1, the fixed work platform 5 and the climbing mechanism 4. Its shooting range covers the lifting work platform body 1, the interior of the fixed work platform and a certain area around the two, such as a circle extending 2 meters around, to ensure that it covers the extended range that the operator can reach when he stretches his body or limbs out. The shooting range covers the climbing mechanism 4, which can be used to identify the operator when he is near the lower end of the climbing mechanism 4, and at the same time, possible information collection and position monitoring can be performed during the climbing process; the motion sensor is also arranged in the shooting range covered by the visual camera to assist in realizing the above functions; the processor is used to control the visual camera and motion sensor and realize the control.

[0019] As an implementation mode, the lower end of the climbing mechanism 4 is provided with a linkage door lock, which is configured to be controlled and connected with the visual module; specifically, Figure 1 The position indicated by the dotted circle in the middle A part is the lower end position of the climbing mechanism 4 corresponding to the surface of the work site. A circle of enclosure is set here, and an openable and closable door body is provided on the enclosure, and a linkage door lock is set on the door body; the enclosure, the door body, and the door lock can be purchased directly.

[0020] As an implementation mode, the mobile mechanism 3 is provided with a linkage door lock, which is configured to be controlled and connected with the visual module; specifically, Figure 1 The position indicated by the dotted circle in part A is the lower end position of the climbing mechanism 4 corresponding to the surface of the work site, and the position indicated by the dotted circle in part B is the lower end position of the travel of the lifting work platform body 1. A circle of enclosures is set on the periphery of A and B, and an openable and closable door body is provided on the enclosure, and a linkage door lock is set on the door body; the enclosure, the door body, and the door lock can be purchased directly.

[0021] A safety early warning control method for a lifting work platform comprises the following steps: (1) Obtaining the physical information of the operator, and based on the height of the fence of the lifting work platform body of the lifting work platform, obtaining the maximum inclination angle of the torso of the operator leaning out of the fence, and defining the maximum inclination angle as a first safety threshold.

[0022] As an implementation method, the physical appearance information includes height, weight and body shape.

[0023] As an important parameter, height parameter can not only be used to assist in verifying the identity of the operator, but also to assist in determining the mass distribution of the whole body, dividing the position of the leaning point after leaning on the fence, and the upper and lower body ranges of the leaning point; while the body shape contour includes not only the front body shape information, but also the side body shape information, or body shape information at other specific angles, such as axonometric perspective, etc. These can be set and determined according to the installation points of information acquisition equipment such as cameras installed on site, so that the chest, abdomen, thighs and other positions with large differences can be included in the analysis, and the height parameter and weight parameter can be combined to analyze the mass distribution that is closer to the actual situation, so as to calculate the safe inclination angle of protruding from the fence based on the body and the fence leaning point, and other judgment bases as reference parameters for safety detection.

[0024] In addition, a parameter of standard body contour can also be introduced. The standard body contour specifically refers to the body parameters that meet the set height, gender and BMI value. Each standard body contour has a corresponding standard mass. The standard mass is the weight corresponding to the set height, gender and BMI value. The BMI used for the standard mass can be any value in the range of 18.5-24. A reference set can be generated in advance based on the combination of height, gender and BMI values; and the body contour of each operator is the target body contour. When an operator who is not stored in the database in advance appears, his target height parameter and target gender parameter are obtained, and his target body contour parameter is obtained by combining with the above reference set; then the target body contour under the target height parameter and target gender parameter is compared with the standard body contour, and for the part where the target body contour is larger than the standard body contour, the first deviation mass of the part is calculated according to a certain muscle and fat density ratio; for the part where the target body contour is smaller than the standard body contour, the second deviation mass of the part is calculated according to a certain muscle and fat density ratio; through the first deviation mass and the second deviation mass, when there is a lack of operator weight information in the database, the predicted weight can be obtained in real time using the information collected visually, that is, the standard mass + the first deviation mass or the second deviation mass.

[0025] As an implementation method, step (1) specifically includes the following steps: (11) determining a leaning position on the body contour of the operator according to the fence height of the lifting work platform body and the height of the operator, and obtaining a first mass of the body part above the leaning position and a second mass of the body part below the leaning position according to the body contour; (12) Calculate the maximum value of the inclination angle of the body part above the leaning position protruding from the fence based on the first mass and the second mass, that is, the maximum inclination angle.

[0026] As an implementation method, step (12) specifically includes the following steps: refer to Figure 3 and Figure 4 , collect multiple reference parts on the body contour of the operator above the leaning position, where the leaning height is h and the operator height is H, fit the positions of the multiple reference parts to the inclination reference line, then the angle between the inclination reference line and the vertical direction is the inclination angle a of the body part above the leaning position sticking out of the fence, when the absolute values ​​of the moments of the first mass and the second mass about the leaning position are equal, it is judged that the inclination angle in this state is the maximum inclination angle.

[0027] As an implementation mode, after obtaining the physical appearance information of the operator, the following steps are also included: The physical information includes facial features. The facial features of the operator are compared with the facial features stored in the database. If the verification result is wrong, the current person is prohibited from entering the lifting work platform.

[0028] (2) Based on the environmental characteristics around the lifting platform, the maximum protrusion distance that the operator can protrude from the fence is obtained, and the maximum distance is defined as a second safety threshold.

[0029] As an implementation method, step (2) specifically includes the following steps: When the lifting work platform is in a stationary state, the distance that will not cause interference from each extension angle can be obtained based on the distance between the fence corresponding to the position of the operator and the objects around the lifting work platform, that is, the maximum probe distance; when the lifting work platform is in a moving state, the distance that will not cause interference from each extension angle at the fence corresponding to the position of the operator in the moving direction and within the first preset time can be obtained, that is, the maximum probe distance.

[0030] (3) If the posture of the operator is within the range defined by the first safety threshold and the second safety threshold, it is determined to be a safe state; otherwise, it is determined to be a warning state.

[0031] As an implementation mode, before step (3), the following steps are also included: The posture state of the operator is identified. If the posture state is standing, the first safety threshold and the second safety threshold are used to determine the safety state or warning state; if the posture state is kneeling or lying, and the duration exceeds a second preset time, it is determined to be a warning state.

[0032] As an implementation mode, after step (3) is judged as a warning state, the following steps are further included: Sending a first alarm message to the control room, wherein the first alarm message includes an audio and video file corresponding to the posture of the operator within a second preset time before entering the warning state; A second alarm message is sent to a first preset range around the lifting work platform, wherein the second alarm message includes identity information and posture information corresponding to the operator; after the first alarm message is responded to by the control room or the second alarm message is responded to once, the second alarm message is eliminated.

[0033] This safety warning control method takes two aspects into consideration: first, the operator as a whole may tip over; second, the part of the operator extending out of the lifting platform may be injured by objects outside the lifting platform. Based on the above two safety considerations, corresponding safety judgment and warning logic are formulated. In addition, by combining the specific working environment of the lifting platform and the physical characteristics of the operators, different standard warning parameters can be implemented for different personnel, realizing an intelligent one-person-one-control mode. Compared with traditional fixed parameter monitoring and warning, it can significantly reduce the probability of false alarms and also provide a hardware foundation for building a smart factory with full equipment coverage.

[0034] The following is a description of a specific embodiment.

[0035] 1. Activation system - the personnel identification unit is set on the lifting work platform body and the climbing ladder. When someone enters the preset range of the climbing ladder (such as the upper half) / or when human activity is detected in the lifting work platform body, the system is activated; 2. Personnel body recognition - (1) The facial image is acquired through the camera, and the height parameters when standing or climbing are obtained, and then compared with the database. If the recognition is successful, no action is taken; (2) If the recognition is not successful, the linkage door lock is controlled to lock the doors and operation panels at the platform entrance and exit to ensure that unqualified personnel cannot operate illegally; (3) In addition, a backup verification port (card swipe / fingerprint) is also provided in the climbing ladder and the lifting work platform, which can be manually unlocked when the system recognizes an error; 3. System working logic - (1) Collect the parameters of the personnel entering the lifting work platform, and calculate the first safety threshold for the torso based on the height, body shape, fence height of the lifting work platform and other information in the obtained personnel parameters; (2) According to the dangerous areas in the site identified in the database and the real-time detection environment, the second safety threshold for the limbs is obtained in combination with the above personnel parameters; (3) The visual sensor regularly captures and recognizes the position and detects that the safety value corresponding to the protruding part of the person's torso and the protruding angle exceeds the first safety protruding threshold, the warning light in the work platform turns on yellow and the loudspeaker broadcasts, alerting the operator to the risk of falling; when the safety value corresponding to the protruding distance of the person's limbs is detected to be greater than the second safety threshold, the warning light in the work platform turns on yellow and the loudspeaker broadcasts, alerting the operator to the safety risks of bumping, hitting, etc.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A safety early warning control method for a lifting work platform, characterized in that: The following steps are involved: (1) Obtaining the physical information of the operator, and based on the height of the fence of the lifting work platform, obtaining the maximum inclination angle of the torso of the operator leaning out of the fence, and defining the maximum inclination angle as a first safety threshold; (2) based on the environmental characteristics around the lifting work platform, obtaining a maximum protrusion distance that the operator can protrude from the fence, and defining the maximum distance as a second safety threshold; (3) If the posture of the operator is within the range defined by the first safety threshold and the second safety threshold, it is determined to be a safe state; otherwise, it is determined to be a warning state.

2. The safety warning control method for a lifting work platform according to claim 1, characterized in that: The physical information includes height, weight and body shape.

3. The safety early warning control method for a lifting work platform according to claim 2 is characterized in that: The body contour includes a standard body contour and a target body contour; the standard body contour specifically refers to body parameters that meet the set height, set gender and set BMI value, and each standard body contour has a corresponding standard mass; the target body contour is the body contour of the operator; the compensation mass can be obtained by comparing the standard body contour and the target body contour, and the predicted weight of the operator is the sum of the standard weight and the compensation mass.

4. The safety early warning control method for a lifting work platform according to claim 3 is characterized in that: The compensation mass includes a first deviation mass and a second deviation mass; the compensation mass can be obtained by comparing the quasi-body shape contour with the target body shape contour, which specifically includes the following steps: The target body shape contour under the target height parameters and target gender parameters is compared with the standard body shape contour. For the part where the target body shape contour is larger than the standard body shape contour, the first deviation mass of the part is calculated according to a certain muscle and fat density ratio; for the part where the target body shape contour is smaller than the standard body shape contour, the second deviation mass of the part is calculated according to a certain muscle and fat density ratio.

5. The safety early warning control method for a lifting work platform according to claim 2, characterized in that: The step (1) specifically includes the following steps: (11) determining a leaning position on the body contour of the operator according to the fence height of the lifting work platform and the height of the operator, and obtaining a first mass of the body part above the leaning position and a second mass of the body part below the leaning position according to the body contour; (12) Calculate the maximum value of the inclination angle of the body part above the leaning position protruding from the fence based on the first mass and the second mass, that is, the maximum inclination angle.

6. The safety early warning control method for a lifting work platform according to claim 5, characterized in that: The step (12) specifically includes the following steps: Multiple reference parts on the body contour of the operator above the leaning position are collected, and the positions of the multiple reference parts are fitted into an inclination reference line, so that the angle between the inclination reference line and the vertical direction is the inclination angle of the body part above the leaning position protruding from the fence, and when the absolute values ​​of the moments of the first mass and the second mass about the leaning position are equal, the inclination angle in this state is judged to be the maximum inclination angle.

7. The safety early warning control method for a lifting work platform according to claim 1, characterized in that: The step (2) specifically includes the following steps: When the lifting work platform is in a stationary state, the distance that will not cause interference from each extension angle is obtained according to the distance between the fence corresponding to the position of the operator and the objects around the lifting work platform, that is, the maximum probe distance; when the lifting work platform is in a moving state, the distance that will not cause interference from each extension angle is obtained according to the distance between the fence corresponding to the position of the operator in the moving direction and within the first preset time, that is, the maximum probe distance.

8. The safety early warning control method for a lifting work platform according to claim 1, characterized in that: After obtaining the physical information of the operator in step (1), the following steps are also included: The physical information includes facial features. The facial features of the operator are compared with the facial features stored in the database. If the verification result is wrong, the current person is prohibited from entering the lifting work platform.

9. The safety early warning control method for a lifting work platform according to claim 1, characterized in that: Before step (3), the method further includes the following steps: Identify the posture state of the operator, and if the posture state is standing, use the first safety threshold and the second safety threshold to determine the safety state or warning state; if the posture state is kneeling or lying, and the duration exceeds a second preset time, determine it as a warning state; After the judgment is in the warning state, the following steps are also included: Sending a first alarm message to the control room, wherein the first alarm message includes an audio and video record of the posture of the operator within a second preset time before entering the warning state; A second alarm message is sent to a first preset range around the lifting work platform, wherein the second alarm message includes identity information and posture information corresponding to the operator; after the first alarm message is responded to by the control room or the second alarm message is responded to once, the second alarm message is eliminated.

10. A safety warning control system for a lifting work platform, characterized in that: It includes a visual module, which is arranged on the lifting work platform and is used to execute the safety warning control method described in any one of claims 1 to 9.

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