CN114863360A - Method and device for determining safety interval of mobile nuclear magnetic equipment - Google Patents
Method and device for determining safety interval of mobile nuclear magnetic equipment Download PDFInfo
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- CN114863360A CN114863360A CN202210396228.1A CN202210396228A CN114863360A CN 114863360 A CN114863360 A CN 114863360A CN 202210396228 A CN202210396228 A CN 202210396228A CN 114863360 A CN114863360 A CN 114863360A
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- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
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Abstract
The invention relates to the technical field of equipment safety, in particular to a method for determining a safety interval of mobile nuclear magnetic equipment, which comprises the following steps of S1, moving the mobile nuclear magnetic equipment to a preset area; step S2, the camera on the mobile nuclear magnetic equipment scans the surrounding environment and judges whether articles influencing the use safety of the nuclear magnetic equipment exist in the safety interval; and step S3, shooting obliquely by a camera on the mobile nuclear magnetic equipment to obtain a background image, obtaining a dynamic image of the periphery by the camera in real time, and comparing the obtained image with the background image to judge whether an article intrudes into the safety zone. According to the invention, the safety zone of the mobile magnetic resonance equipment is effectively determined by acquiring the surrounding image information, converting the image information into the background image, acquiring the image information of the monitoring range in real time and comparing the image information with the background image information image.
Description
Technical Field
The invention relates to the technical field of equipment safety, in particular to a method and a device for determining a safety interval of mobile nuclear magnetic equipment.
Background
Magnetic resonance examination is one of common medical image diagnosis examinations, and through magnetic resonance imaging, a magnetic resonance image of tissues or structures inside a patient body can be clearly displayed, so that medical staff can be helped to observe and diagnose diseases of the patient, and a common magnetic resonance device is large in size and difficult to move.
In order to solve the above problems, a small magnetic resonance medical apparatus for local detection has appeared, which can be moved conveniently and conveniently, thereby facilitating the detection of a patient, however, the leakage magnetic field of the convenient magnetic resonance apparatus has a certain potential safety hazard to surrounding people and apparatuses, so that a safe interval needs to be determined when the convenient magnetic resonance apparatus is used, the range of the safe interval takes the 5 gauss line as an evaluation reference, however, the range of the 5 gauss line cannot be observed by human eyes, and therefore, a method for effectively determining the safe interval of the convenient magnetic resonance apparatus is needed.
Disclosure of Invention
Therefore, the invention provides a method and a device for determining a safety interval of mobile nuclear magnetic equipment, which are used for solving the problems that the safety interval of the conveniently determined magnetic resonance equipment is not determined clearly and potential safety hazards exist to surrounding personnel in the prior art.
In order to achieve the above object, the present invention provides a method for determining a safety interval of a mobile nuclear magnetic equipment, comprising,
step S1, moving the mobile nuclear magnetic equipment to a preset area;
step S2, the camera on the mobile nuclear magnetic equipment scans the surrounding environment and judges whether articles influencing the use safety of the nuclear magnetic equipment exist in the safety interval;
step S3, shooting obliquely by a camera on the mobile nuclear magnetic equipment to obtain a background image;
step S4, the camera acquires the dynamic image of the periphery in real time, and compares the acquired image with the background image to judge whether the article intrudes into the safety zone;
when judging whether articles exist in the safety area of the mobile nuclear magnetic equipment, a central control system for calculation and judgment is arranged;
in the step S2, a plurality of cameras with adjustable angles are arranged on the mobile nuclear magnetic equipment, and each of the cameras has a distance measurement function;
in step S4, when the acquired image has a region different from the background image, the size and the existence duration of the different region are recorded, and it is determined whether an article intrudes into the security area according to the size and the existence duration of the different region.
By acquiring surrounding image information and converting the image information into a background image, the image information in a monitoring range is acquired in real time and compared with the background image information image, so that the equipment occupies a small area, on one hand, the environmental information is acquired quickly, on the other hand, the safety interval of the movable magnetic resonance equipment is determined effectively through image detection, the influence on surrounding medical equipment is prevented, and meanwhile, the potential safety hazard to surrounding personnel in the using process is reduced.
Furthermore, the number of the cameras is five, and the cameras are respectively a first camera, a second camera, a third camera, a fourth camera and a fifth camera;
the central control system records the image information acquired by the first camera as B1, the image information acquired by the second camera as B2, the image information acquired by the third camera as B3, the image information acquired by the fourth camera as B4 and the image information acquired by the fifth camera as B5;
a hospital common article image set group A0 and A0(A1 and A2) are arranged in the central control system, wherein A1 is an article set which has influence on nuclear magnetism or can be influenced by the nuclear magnetism, and A2 is an article set which has no influence on the nuclear magnetism and cannot be influenced by the nuclear magnetism;
the central control system is provided with a preset safety distance L; the safety distance is determined by the range of the 5 gauss line, and if the distance of the 5 gauss line is Lz, L is 1.2 Lz.
The central control system analyzes the collected image Bi, i is 1,2,3,4,5, when an object exists in the image Bi within a preset safe distance L, the central control system extracts the object within the safe distance, the extracted image is marked as a, the central control system compares the image a with the image data in the set A0,
when a belongs to A1, the central control system judges that dangerous goods exist in the safety zone of the nuclear magnetic equipment, and records the position information of the goods corresponding to the image a;
when a belongs to A2, the central control system judges that the article corresponding to the image a does not influence nuclear magnetic detection;
when in use
And is
And when the image a is detected to be positioned in the article, the central control system judges that the article corresponding to the image a cannot be identified, and records the position information of the article corresponding to the image a.
Furthermore, a display screen is arranged on the mobile nuclear magnetic equipment, the central control system analyzes the five collected images B1-B5 in sequence, summarizes the analysis results, displays the data through the display screen,
when dangerous goods exist in the safety interval of the nuclear magnetic equipment, displaying position information of the goods by a display screen, and moving the dangerous goods by personnel;
when an unidentifiable article exists in a safety area of the nuclear magnetic equipment, displaying position information of the article on a display screen, identifying the article by personnel, and inputting an identification result into the nuclear magnetic equipment;
when no dangerous goods exist or goods cannot be identified in the safety interval of the nuclear magnetic equipment, the display area of the display screen is safe, and the central control system controls the shooting direction of each camera to move towards the ground for oblique shooting.
Further, when dangerous goods or unidentifiable goods exist in the safety area of the nuclear magnetic equipment, the nuclear magnetic function cannot be started until the dangerous goods are removed and the safety of the unidentifiable goods is manually confirmed.
Strict starting requirements of nuclear magnetic equipment are met, and accidents are prevented.
Furthermore, when each camera carries out inclined shooting, each camera respectively acquires a plurality of images, the central control system selects the shot images, acquires the clearest image shot by each camera as the background image of the corresponding camera, acquires the dynamic image of the monitoring range in real time by each camera and transmits the dynamic image to the central control system, and the central control system compares the acquired dynamic image with the corresponding background image to judge whether an article intrudes into the safety zone.
Further, for the background image Ci, i of the ith camera is 1,2,3,4,5, the ith camera acquires the dynamic image Di in real time and transmits the detection result to the central control system, the central control system compares the dynamic image Di with the background image Ci,
when the dynamic image Di has the region G which is different from the image of the background image Ci, the central control system judges the region G which is different from the image of the background image Ci, and obtains the area and the existence duration of the region G so as to judge whether the region G appears due to the intrusion of the article.
Further, when the region G exists, the central control system acquires the area G of the region G, and simultaneously times the existence duration of the region G, the real-time duration information of the region G is T, and the central control system judges the danger of the region G according to the area G and the duration information T;
the central control system calculates a risk score F of the area G, wherein F is G multiplied by fg + T multiplied by ft, fg is a calculation compensation parameter of the area G to the risk score F, and ft is a calculation compensation parameter of the duration information T to the risk score F;
a danger score evaluation parameter Fp is arranged in the central control system, the central control system compares the danger score F with the danger score evaluation parameter Fp,
when F is less than or equal to Fp, the central control system judges that the region G does not influence the safety interval of the nuclear magnetic equipment;
when F is larger than Fp, the central control system judges that the region G has the probability of influencing the safety interval of the nuclear magnetic equipment, and controls the alarm device to give out a prompt. The fg and the ft have two functions, namely, the dimension of the adjustment calculation and the assignment of the adjustment calculation result.
Furthermore, a first preset area evaluation parameter G1, a second preset area evaluation parameter G2, G1 < G2, a first preset area risk score calculation compensation parameter value FG1, a second preset area risk score calculation compensation parameter value FG2, a third preset area risk score calculation compensation parameter value FG3, FG1 < FG2 < FG3 are arranged in the central control system, the central control system compares the area G of the area G with the first preset area evaluation parameter G1 and the second preset area evaluation parameter G2,
when g is not more than g1, the central control system selects FG1 as the value of FG;
when g is greater than g1 and less than or equal to g2, the central control system selects FG2 as the value of FG;
when g > g2, the central control system selects FG3 as the value of FG.
Further, a first preset duration evaluation parameter T1, a second preset duration evaluation parameter T2, a first preset duration information risk score calculation compensation parameter FT1, a second preset duration information risk score calculation compensation parameter FT2 and a third preset duration information risk score calculation compensation parameter FT3 are arranged in the central control system, wherein T1 is larger than T2, FT1 is larger than FT2 and smaller than FT3, the central control system compares the detected duration information T with the first preset duration evaluation parameter T1 and the second preset duration evaluation parameter T2,
when T is less than or equal to T1, the central control system selects FT1 as the value of FT;
when T is more than T1 and less than or equal to T2, the central control system selects FT2 as the value of FT;
when T is larger than T2, the central control system selects FT3 as the value of FT.
The invention also discloses a device for determining the safety equipment of the mobile nuclear magnetic equipment, which is applied to the method for determining the safety equipment of the mobile nuclear magnetic equipment and comprises,
the detection assembly is used for carrying out nuclear magnetic detection;
the equipment cabinet is arranged below the detection assembly, and a central control system is arranged in the equipment cabinet;
the monitoring assembly consists of a plurality of cameras with adjustable angles and is connected with the central control system; each camera has a distance measuring function;
the alarm device is arranged on the machine cabinet and gives an alarm when people or objects are detected to enter a safety zone;
the display component is arranged on the machine cabinet and used for displaying the coordinates of the articles in the safety area;
and the central control system is connected with the monitoring component, the alarm device and the display component respectively and is used for judging whether people or objects exist in the nuclear magnetic safety interval.
Compared with the prior art, the method has the advantages that the image information of the surrounding is obtained and converted into the background image, the image information of the monitoring range is obtained in real time and is compared with the background image information image, the occupied area of the equipment is small, on one hand, the environmental information is quickly obtained, on the other hand, the safety area of the movable magnetic resonance equipment is effectively determined through image detection, the influence on surrounding medical equipment is prevented, and meanwhile, the potential safety hazard to surrounding personnel in the using process is reduced.
Furthermore, a common article image set group A0 and A0(A1 and A2) of a hospital is arranged in the central control system, wherein A1 is an article set which has an influence on nuclear magnetism or can be influenced by nuclear magnetism, A2 is an article set which has no influence on nuclear magnetism and cannot be influenced by nuclear magnetism, the central control system extracts images of objects within a safe distance, the extracted images are marked as a, the central control system compares the images a with image data in the set group A0, and by recording common environment information of the hospital, equipment information which cannot influence the nuclear magnetism and cannot be influenced by the nuclear magnetism is recorded, so that the use convenience of the mobile nuclear magnetism equipment is improved.
Further, when dangerous goods or unidentifiable goods exist in the safety area of the nuclear magnetic equipment, the nuclear magnetic function cannot be started until the dangerous goods are removed and the safety of the unidentifiable goods is manually confirmed. Strict starting requirements of nuclear magnetic equipment are met, and accidents are prevented.
Further, when the region G exists, the central control system acquires the area G of the region G, and simultaneously times the existence duration of the region G, the real-time duration information of the region G is T, the central control system judges the risk of the region G according to the area G and the duration information T, calculates the risk score F of the region G, sets a risk score evaluation parameter Fp in the central control system, compares the risk score F with the risk score evaluation parameter Fp, and prevents the false alarm by setting the risk score to increase the accuracy of judgment.
Particularly, the larger the area is, the larger the calculation compensation parameter value of the area to the risk score is, so that the alarm is quicker, the safety interval of the movable magnetic resonance equipment is effectively determined, the influence on the surrounding medical equipment is prevented, and meanwhile, the potential safety hazard to surrounding personnel in the using process is reduced.
Particularly, the longer the duration is, the larger the calculation compensation parameter value of the duration on the risk score is, so that the alarm is quicker, the safety interval of the mobile magnetic resonance equipment is effectively determined, the influence on the surrounding medical equipment is prevented, and meanwhile, the potential safety hazard to surrounding personnel in the using process is reduced.
Drawings
Fig. 1 is a schematic flow chart of a method for determining a safety interval of a mobile nuclear magnetic equipment according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mobile nuclear magnetic equipment safety device determining apparatus according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a method for determining a safety interval of a mobile nuclear magnetic equipment according to an embodiment of the present invention;
the invention provides a method for determining a safety interval of mobile nuclear magnetic equipment, which comprises the following steps,
step S1, moving the mobile nuclear magnetic equipment to a preset area;
step S2, the camera on the mobile nuclear magnetic equipment scans the surrounding environment and judges whether articles influencing the use safety of the nuclear magnetic equipment exist in the safety interval;
step S3, shooting obliquely by a camera on the mobile nuclear magnetic equipment to obtain a background image;
step S4, the camera acquires the dynamic image of the periphery in real time, and compares the acquired image with the background image to judge whether the article intrudes into the safety zone;
when judging whether articles exist in the safety area of the mobile nuclear magnetic equipment, a central control system for calculation and judgment is arranged;
in the step S2, a plurality of cameras with adjustable angles are arranged on the mobile nuclear magnetic equipment, and each of the cameras has a distance measurement function;
in step S4, when the acquired image has a region different from the background image, the size and the existence duration of the different region are recorded, and it is determined whether an article intrudes into the security zone according to the size and the existence duration of the different region.
By acquiring surrounding image information and converting the image information into a background image, the image information in a monitoring range is acquired in real time and compared with the background image information image, on one hand, the environment information is acquired quickly, on the other hand, the equipment occupies a small area through image detection, the safety interval of the movable magnetic resonance equipment is effectively determined, the influence on surrounding medical equipment is prevented, and meanwhile, the potential safety hazard to surrounding personnel in the using process is reduced.
Specifically, the number of the cameras is five, namely a first camera, a second camera, a third camera, a fourth camera and a fifth camera,
the central control system records the image information acquired by the first camera as B1, the image information acquired by the second camera as B2, the image information acquired by the third camera as B3, the image information acquired by the fourth camera as B4 and the image information acquired by the fifth camera as B5;
a hospital common article image set group A0 and A0(A1 and A2) are arranged in the central control system, wherein A1 is an article set which has influence on nuclear magnetism or can be influenced by the nuclear magnetism, and A2 is an article set which has no influence on the nuclear magnetism and cannot be influenced by the nuclear magnetism;
the central control system is provided with a preset safety distance L;
the central control system analyzes the collected image Bi, i is 1,2,3,4,5, when an object exists in the image Bi within a preset safe distance L, the central control system extracts the object within the safe distance, the extracted image is marked as a, the central control system compares the image a with the image data in the set A0,
when a belongs to A1, the central control system judges that dangerous goods exist in the safety zone of the nuclear magnetic equipment, and records the position information of the goods corresponding to the image a;
when a belongs to A2, the central control system judges that the article corresponding to the image a does not influence nuclear magnetic detection;
when in use
And is
And when the image a is detected to be positioned in the article, the central control system judges that the article corresponding to the image a cannot be identified, and records the position information of the article corresponding to the image a. Through typing in the common environmental information of hospital, type and can not exert an influence to nuclear magnetism, and can not be by the equipment information of nuclear magnetism influence, increase the convenience that portable nuclear magnetism equipment used.
Specifically, the mobile nuclear magnetic equipment is provided with a display screen, the central control system analyzes five collected images B1-B5 in sequence, summarizes the analysis results and displays the data through the display screen,
when dangerous goods exist in the safety interval of the nuclear magnetic equipment, displaying position information of the goods by a display screen, and moving the dangerous goods by personnel;
when an unidentifiable article exists in a safety area of the nuclear magnetic equipment, displaying position information of the article on a display screen, identifying the article by personnel, and inputting an identification result into the nuclear magnetic equipment;
when no dangerous goods exist or goods cannot be identified in the safety interval of the nuclear magnetic equipment, the display area of the display screen is safe, and the central control system controls the shooting direction of each camera to move towards the ground for oblique shooting.
Specifically, when a dangerous article or an unidentifiable article exists in a safety area of the nuclear magnetic equipment, the nuclear magnetic function cannot be started until the dangerous article is removed and the safety of the unidentifiable article is manually confirmed.
Specifically, when each camera performs oblique shooting, each camera respectively acquires a plurality of images, the central control system selects the shot images, acquires the clearest image shot by each camera as the background image of the corresponding camera, acquires the dynamic image of the monitoring range in real time by each camera, transmits the dynamic image to the central control system, and compares the acquired dynamic image with the corresponding background image to determine whether an article intrudes into the safety zone.
Specifically, for the background image Ci of the ith camera, i is 1,2,3,4,5, the ith camera acquires the dynamic image Di in real time and transmits the detection result to the central control system, the central control system compares the dynamic image Di with the background image Ci,
when the dynamic image Di has the region G which is different from the image of the background image Ci, the central control system judges the region G which is different from the image of the background image Ci, and obtains the area and the existence duration of the region G so as to judge whether the region G appears due to the intrusion of the article.
Specifically, when the area G exists, the central control system acquires the area G of the area G, and simultaneously times the existence duration of the area G, the real-time duration information of the area G is T, and the central control system judges the danger of the area G according to the area G and the duration information T;
the central control system calculates a risk score F of the area G, wherein F is G multiplied by fg + T multiplied by ft, fg is a calculation compensation parameter of the area G to the risk score F, and ft is a calculation compensation parameter of the duration information T to the risk score F;
a danger score evaluation parameter Fp is arranged in the central control system, the central control system compares the danger score F with the danger score evaluation parameter Fp,
when F is less than or equal to Fp, the central control system judges that the region G does not influence the safety interval of the nuclear magnetic equipment;
when F is larger than Fp, the central control system judges that the region G has the probability of influencing the safety interval of the nuclear magnetic equipment, and controls the alarm device to give out a prompt. The fg and the ft have two functions, namely, the dimension of the adjustment calculation and the assignment of the adjustment calculation result. By setting the danger score, the alarm is prevented from being misreported, and the judgment accuracy is improved.
Specifically, a first preset area evaluation parameter G1, a second preset area evaluation parameter G2, G1 < G2, a first preset area risk score calculation compensation parameter value FG1, a second preset area risk score calculation compensation parameter value FG2, a third preset area risk score calculation compensation parameter value FG3, FG1 < FG2 < FG3 are arranged in the central control system, the central control system compares the area G of the area G with the first preset area evaluation parameter G1 and the second preset area evaluation parameter G2,
when g is not more than g1, the central control system selects FG1 as the value of FG;
when g is greater than g1 and less than or equal to g2, the central control system selects FG2 as the value of FG;
when g > g2, the central control system selects FG3 as the value of FG.
The larger the area is, the larger the calculation compensation parameter value of the area to the danger score is, so that the alarm is quicker, the safety interval of the movable magnetic resonance equipment is effectively determined, the influence on the surrounding medical equipment is prevented, and meanwhile, the potential safety hazard to surrounding personnel in the use process is reduced.
Specifically, a first preset duration evaluation parameter T1, a second preset duration evaluation parameter T2, a risk score calculation compensation parameter FT1 based on first preset duration information, a risk score calculation compensation parameter FT2 based on second preset duration information, and a risk score calculation compensation parameter FT3 based on third preset duration information are arranged in the central control system, wherein T1 is less than T2, FT1 is less than FT2 is less than FT3, the central control system compares the detected duration information T with the first preset duration evaluation parameter T1 and the second preset duration evaluation parameter T2,
when T is less than or equal to T1, the central control system selects FT1 as the value of FT;
when T is more than T1 and less than or equal to T2, the central control system selects FT2 as the value of FT;
when T is larger than T2, the central control system selects FT3 as the value of FT.
The longer the time is, the larger the calculation compensation parameter value of the time to the danger score is, so that the alarm is quicker, the safety interval of the movable magnetic resonance equipment is effectively determined, the influence on the surrounding medical equipment is prevented, and meanwhile, the potential safety hazard to surrounding personnel in the use process is reduced.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a mobile nuclear magnetic equipment safety device determining apparatus according to an embodiment of the present invention.
The invention also discloses a device for determining the safety equipment of the mobile nuclear magnetic equipment, which is applied to the method for determining the safety equipment of the mobile nuclear magnetic equipment and comprises,
the detection assembly 1 is used for carrying out nuclear magnetic detection;
the cabinet 2 is arranged below the detection assembly 1, and a central control system is arranged in the cabinet;
the monitoring component 3 consists of a plurality of cameras with adjustable angles, and is connected with the central control system; each camera has a distance measuring function;
the alarm device 4 is arranged on the cabinet 2 and gives an alarm when people or objects are detected to enter a safety zone;
the display component 5 is arranged on the cabinet 2 and used for displaying the coordinates of the objects in the safety area;
and the central control system (not shown in the figure) is respectively connected with the monitoring component, the alarm device and the display component and is used for judging whether people or objects exist in the nuclear magnetic safety interval.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A method for determining a safety interval of mobile nuclear magnetic equipment is characterized by comprising the following steps,
step S1, moving the mobile nuclear magnetic equipment to a preset area;
step S2, the camera on the mobile nuclear magnetic equipment scans the surrounding environment and judges whether articles influencing the use safety of the nuclear magnetic equipment exist in the safety interval;
step S3, shooting obliquely by a camera on the mobile nuclear magnetic equipment to obtain a background image;
step S4, the camera acquires the dynamic image of the periphery in real time, and compares the acquired image with the background image to judge whether the article intrudes into the safety zone;
when judging whether articles exist in the safety area of the mobile nuclear magnetic equipment, a central control system for calculation and judgment is arranged;
in the step S2, a plurality of cameras with adjustable angles are arranged on the mobile nuclear magnetic equipment, and each of the cameras has a distance measurement function;
in step S4, when the acquired image has a region different from the background image, the size and the existence duration of the different region are recorded, and it is determined whether an article intrudes into the security zone according to the size and the existence duration of the different region.
2. The method for determining safety equipment of mobile nuclear magnetic equipment according to claim 1, wherein the number of the cameras is five, namely a first camera, a second camera, a third camera, a fourth camera and a fifth camera,
the central control system records the image information acquired by the first camera as B1, the image information acquired by the second camera as B2, the image information acquired by the third camera as B3, the image information acquired by the fourth camera as B4 and the image information acquired by the fifth camera as B5;
a hospital common article image set group A0 and A0(A1 and A2) are arranged in the central control system, wherein A1 is an article set which has influence on nuclear magnetism or can be influenced by the nuclear magnetism, and A2 is an article set which has no influence on the nuclear magnetism and cannot be influenced by the nuclear magnetism;
the central control system is provided with a preset safety distance L;
the central control system analyzes the collected image Bi, i is 1,2,3,4,5, when an object exists in the image Bi within a preset safe distance L, the central control system extracts the object within the safe distance, the extracted image is marked as a, the central control system compares the image a with the image data in the set A0,
when a belongs to A1, the central control system judges that dangerous goods exist in the safety zone of the nuclear magnetic equipment, and records the position information of the goods corresponding to the image a;
when a belongs to A2, the central control system judges that the article corresponding to the image a does not influence nuclear magnetic detection;
when in use
And is
And when the image a is detected to be positioned in the article, the central control system judges that the article corresponding to the image a cannot be identified, and records the position information of the article corresponding to the image a.
3. The method for determining the safety equipment of the mobile nuclear magnetic equipment according to claim 2, wherein a display screen is arranged on the mobile nuclear magnetic equipment, the central control system analyzes the five collected images B1-B5 in sequence, summarizes the analysis results, and displays the data through the display screen,
when dangerous goods exist in the safety interval of the nuclear magnetic equipment, displaying position information of the goods by a display screen, and moving the dangerous goods by personnel;
when an unidentifiable article exists in a safety area of the nuclear magnetic equipment, displaying position information of the article on a display screen, identifying the article by personnel, and inputting an identification result into the nuclear magnetic equipment;
when no dangerous goods exist or goods cannot be identified in the safety interval of the nuclear magnetic equipment, the display area of the display screen is safe, and the central control system controls the shooting direction of each camera to move towards the ground for oblique shooting.
4. The method for determining safety equipment of mobile nuclear magnetic equipment according to claim 3, wherein when dangerous goods or unidentifiable goods exist in the safety area of the nuclear magnetic equipment, the nuclear magnetic function cannot be started until the dangerous goods are removed and the safety of the unidentifiable goods is manually confirmed.
5. The method for determining the safety equipment of the mobile nuclear magnetic equipment according to claim 4, wherein when each camera performs oblique shooting, each camera respectively acquires a plurality of images, the central control system selects the shot images, acquires the clearest image shot by each camera as the background image of the corresponding camera, and each camera acquires the dynamic image in the monitoring range in real time and transmits the dynamic image to the central control system, and the central control system compares the acquired dynamic image with the corresponding background image to determine whether an article intrudes into the safety area.
6. The method for determining the safety equipment of the mobile nuclear magnetic equipment according to claim 5, wherein for the background image Ci, i of the ith camera is 1,2,3,4,5, the ith camera acquires the dynamic image Di in real time and transmits the detection result to the central control system, the central control system compares the dynamic image Di with the background image Ci,
when a region G different from the image Ci of the background image exists in the dynamic image Di, the central control system judges the region G different from the existing image, and obtains the area and the existing time length of the region G to judge whether the region G is caused by the intrusion of the article.
7. The method for determining the safety equipment of the mobile nuclear magnetic equipment according to claim 6, wherein when the area G exists, the central control system acquires the area G of the area G, and simultaneously times the existence duration of the area G, the real-time duration information of the area G is T, and the central control system judges the danger of the area G according to the area G and the duration information T;
the central control system calculates a risk score F of the area G, wherein F is G multiplied by fg + T multiplied by ft, fg is a calculation compensation parameter of the area G to the risk score F, and ft is a calculation compensation parameter of the duration information T to the risk score F;
a danger score evaluation parameter Fp is arranged in the central control system, the central control system compares the danger score F with the danger score evaluation parameter Fp,
when F is less than or equal to Fp, the central control system judges that the region G does not influence the safety interval of the nuclear magnetic equipment;
when F is larger than Fp, the central control system judges that the region G has the probability of influencing the safety interval of the nuclear magnetic equipment, and controls the alarm device to give out a prompt.
8. The method for determining safety equipment of mobile nuclear magnetic equipment according to claim 7, wherein a first preset area evaluation parameter G1, a second preset area evaluation parameter G2, G1 < G2, a first preset area risk score calculation compensation parameter value FG1, a second preset area risk score calculation compensation parameter value FG2, a third preset area risk score calculation compensation parameter value FG3, FG1 < FG2 < FG3 are provided in the central control system, the central control system compares the area G of the area G with the first preset area evaluation parameter G1 and the second preset area evaluation parameter G2,
when g is not more than g1, the central control system selects FG1 as the numerical value of FG;
when g is greater than g1 and less than or equal to g2, the central control system selects FG2 as the value of FG;
when g > g2, the central control system selects FG3 as the value of FG.
9. The method for determining safety equipment of mobile nuclear magnetic equipment according to claim 8, wherein a first preset duration evaluation parameter T1, a second preset duration evaluation parameter T2, a risk score calculation compensation parameter FT1 of the first preset duration information, a risk score calculation compensation parameter FT2 of the second preset duration information, and a risk score calculation compensation parameter FT3 of the third preset duration information are provided in the central control system, wherein T1 is greater than T2, FT1 is greater than FT2 is less than FT3, the central control system compares the detected duration information T with the first preset duration evaluation parameter T1 and the second preset duration evaluation parameter T2,
when T is less than or equal to T1, the central control system selects FT1 as the value of FT;
when T is more than T1 and less than or equal to T2, the central control system selects FT2 as the value of FT;
when T is larger than T2, the central control system selects FT3 as the value of FT.
10. A mobile nuclear magnetic equipment safety device determining device applied to the mobile nuclear magnetic equipment safety device determining method according to any one of claims 1 to 9, which is characterized by comprising,
the detection assembly is used for carrying out nuclear magnetic detection;
the equipment cabinet is arranged below the detection assembly, and a central control system is arranged in the equipment cabinet;
the monitoring assembly consists of a plurality of cameras with adjustable angles and is connected with the central control system; each camera has a distance measuring function;
the alarm device is arranged on the machine cabinet and gives an alarm when people or objects are detected to enter a safety zone;
the display component is arranged on the machine cabinet and used for displaying the coordinates of the articles in the safety area;
and the central control system is connected with the monitoring component, the alarm device and the display component respectively and is used for judging whether people or objects exist in the nuclear magnetic safety interval.
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| CN202210396228.1A CN114863360A (en) | 2022-04-15 | 2022-04-15 | Method and device for determining safety interval of mobile nuclear magnetic equipment |
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| CN202210396228.1A CN114863360A (en) | 2022-04-15 | 2022-04-15 | Method and device for determining safety interval of mobile nuclear magnetic equipment |
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