Positioning auxiliary device of detector, detector and detector positioning system

Abstract

The utility model belongs to the technical field of ray imaging, and particularly relates to a detector positioning auxiliary device, a detector and a detector positioning system. The positioning auxiliary device of the detector comprises an extension arm which is arranged on the detector and extends in the direction away from the detector, a preset relative position relation exists between the extension arm and the detector, or the preset relative position relation and a preset size proportion relation exist between the extension arm and the detector; the ease of certainty of the position of the detector is increased through the extension arm, so that the relative position between the detector and the to-be-detected object can still be determined after most or even all of the detector is shielded.

Description

Technical Field

[0001] The utility model belongs to the technical field of ray imaging, and in particular relates to a detector positioning auxiliary device, a detector and a detector positioning system. Background Art

[0002] The detector is an indispensable device for digital radiography. In digital radiography technology with automatic exposure control, both the detector and the automatic sensing exposure area are indispensable. At present, in digital X-ray imaging equipment with automatic exposure control, the automatic exposure control room and the detector are integrated, or the automatic exposure control board with the automatic exposure control room and the detector are separated. During inspection, the automatic exposure control board is temporarily fixed in front of the detector (between the detector and the object to be inspected). During inspection, the object to be inspected is positioned according to the position of the automatic exposure control room to achieve good quality imaging using automatic exposure control.

[0003] When the object to be detected is in front of the detector, the detector is usually partially or completely blocked, so that the detector cannot be directly observed from the radiation source side, and the relative position relationship between the detector and the object to be detected cannot be determined, and the relative position relationship between the object to be detected and the automatic exposure control room cannot be determined. Therefore, whether automatic exposure control is adopted or not, it is usually necessary for professional technicians to observe and assist the object to be detected to move and position according to experience, so that the object to be detected corresponds to the radiation receiving area of ​​the detector, or the object to be detected corresponds to the position of the automatic exposure control room, but this increases the workload of the technicians and depends on the experience of the technicians. Moreover, if the object to be detected moves after the positioning is completed, the technician needs to promptly discover and readjust the position of the object to be detected, otherwise it will affect the imaging quality. Even if the position of the object to be detected is discovered and readjusted in time, it will also affect the work efficiency. In actual detection, there are still some situations where the object to be detected is not suitable for movement, or the number of times the object to be detected needs to be moved due to the detector is as little as possible. At this time, if most or all of the detector is blocked by the object to be detected, it is necessary to rely on experience to obtain the radiographic image. If there is no experienced technician, it may not be possible to obtain an effective radiographic image.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The applicant found that the existing method of technicians adjusting the relative position between the object to be detected and the detector or the automatic exposure control room based on experience is limited in use, and the imaging quality and imaging efficiency are easily affected by whether the object to be detected moves after positioning. In particular, the inability to accurately find the radiation sensing area of ​​the detector or determine the position of the automatic exposure control room after the detector is blocked by the object to be detected will limit the use of the automatic exposure control function. If the automatic exposure control function is not used, the technician must have skilled operating skills to shoot radiographic images, otherwise the imaging quality will not meet the standard or even overexposure will cause excessive radiation to the object to be detected.

[0006] In order to solve the above technical problems, the present application aims to propose a detector positioning auxiliary device, a detector and a detector positioning system, which increases the lateral area of ​​the detector through the extension arm, improves the ease of determining the position of the detector, and achieves the ability to determine the relative position between the detector and the object to be detected when most or even all of the detector is blocked.

[0007] The technical solution of the utility model is as follows:

[0008] One aspect of the utility model provides a positioning auxiliary device for a detector, including an extension arm arranged on the detector and extending in a direction away from the detector, the extension arm and the detector have a preset relative position relationship, or the extension arm and the detector have a preset relative position relationship and a preset size ratio relationship.

[0009] Furthermore, the extension arm includes a base connected to the edge of the detector and a steering rod installed to the base, and the steering rod is rotated to adjust the angle between the steering rod and the plane where the detector is located.

[0010] Furthermore, the extension arm comprises an extension rod installed on the side of the detector and whose plane is parallel to the plane where the detector is located, and a first scale is provided on the rod body of the extension rod along the length direction of the extension rod.

[0011] Furthermore, the extension arm includes a first rod and a second rod arranged at an angle, and the first rod and / or the second rod are arranged parallel to the plane where the detector is located; the length of the first rod and / or the second rod is a preset length, or a second scale is provided on the first rod and / or the second rod.

[0012] Furthermore, one end of the extension arm is connected to the edge of the detector via a detachable connector, and the other end is extended in a direction away from the detector.

[0013] Further, the detachable connector includes a mounting sleeve that matches the shape of the side of the detector, and the extension arm is connected to the outer wall of the mounting sleeve; or, the detachable connector includes a mounting card arranged at one end of the extension arm, and the mounting card is correspondingly engaged with the side of the detector.

[0014] Furthermore, a plurality of extension arms arranged at intervals are correspondingly installed on the sides of the detector.

[0015] Another aspect of the present invention provides a detector, wherein a positioning auxiliary device for the detector as described above is installed on the side of the detector body.

[0016] Furthermore, the detector includes a radiation sensing area, a dose sensing processing module, an automatic exposure control area input module and a stop signal output module, the automatic exposure control area input module and the stop signal output module are respectively electrically connected to the dose sensing processing module, and the radiation sensing area is electrically connected to the dose sensing processing module.

[0017] In another aspect of the utility model, a detector positioning system is provided, comprising a positioning auxiliary device for the detector as described above, a processor and an image collector for photographing the positioning auxiliary device for the detector; the image collector is electrically connected to the processor.

[0018] The positioning auxiliary device, detector and detector positioning system of the detector of the present invention are aimed at the problem that the existing method of adjusting the relative position between the object to be detected and the detector or the automatic exposure control room according to the experience of the technician is limited in use, and the imaging quality and imaging efficiency are easily affected by whether the object to be detected moves after positioning, especially the problem that the detector cannot accurately find the radiation sensing area of ​​the detector or cannot determine the position of the automatic exposure control room after being blocked by the object to be detected, which will limit the use of the automatic exposure control function. If the radiographic image is not taken without the automatic exposure control function, the technician must have skilled operation skills, otherwise the imaging quality will not meet the standard or even overexposure will cause excessive radiation to the object to be detected. The design includes the extension arm arranged on the detector and extending in the direction away from the detector, and the extension arm has a preset relative position relationship with the detector, or the extension arm has a preset relative position relationship and a preset size ratio relationship with the detector. The extension arm is integrated with the detector, and the space occupied by the detector is increased by the extension arm, reducing the probability that the detector is blocked by the object to be detected as a whole or in part, and then the position of the detector is obtained by the preset relative position relationship between the extension arm and the detector, or the preset relative position relationship and the preset size ratio relationship, and the accuracy of the detector position is ensured, so as to determine the position of the object to be detected based on the position of the detector or perform other operations. Before exposure, it is possible to determine again whether the position of the object to be detected is appropriate based on the position of the detector, or to determine whether the position between the part to be detected and the automatic exposure control room is appropriate, so as to ensure the imaging quality and imaging efficiency, or to ensure the quality of the image obtained using automatic exposure control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention.

[0020] Figure 1 A schematic structural diagram (stereoscopic diagram) showing an embodiment of a positioning auxiliary device for a detector of the present invention;

[0021] Figure 2 A schematic diagram (stereoscopic diagram) showing the structure of the detector positioning auxiliary device of the present invention installed on the detector;

[0022] Figure 3 A schematic diagram (top view) showing the positions of the extension arm and the detector in the positioning auxiliary device of the detector of the present invention;

[0023] Figure 4 A schematic diagram (top view) showing the positions of the extension arm and the detector in the positioning auxiliary device of the detector of the present invention;

[0024] Figure 5 A schematic diagram (top view) showing the positions of the extension arm and the detector in the positioning auxiliary device of the detector of the present invention;

[0025] Figure 6 An exemplary structural schematic diagram (top view) showing a plurality of bases provided on the mounting housing in the positioning auxiliary device for the detector of the present invention;

[0026] Figure 7 An exemplary structural schematic diagram (stereoscopic diagram) of the mounting card of the positioning auxiliary device for the detector of the present invention is shown;

[0027] Figure 8 An exemplary structural schematic diagram (top view) of the mounting card of the positioning auxiliary device for the detector of the present invention is shown;

[0028] Fig. 9 A schematic structural diagram showing another embodiment of the positioning auxiliary device for a detector of the present invention;

[0029] Fig.10 A schematic structural diagram showing another embodiment of the positioning auxiliary device for a detector of the present invention;

[0030] Fig.11 A schematic structural diagram showing another embodiment of the positioning auxiliary device for a detector of the present invention;

[0031] Fig.12 An electrical connection block diagram of an embodiment of the detector of the present invention is shown;

[0032] Fig.13 An electrical connection block diagram of an embodiment of the detector positioning system of the present invention is shown. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with the implementation mode and the accompanying drawings. Here, the schematic implementation mode of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0034] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0035] It should be emphasized that the term "include / comprise" when used herein refers to the presence of a feature, element, step or component, but does not exclude the presence or addition of one or more other features, elements, steps or components. The terms "upper", "lower", "horizontal", "vertical", etc. in this application are only relative to the corresponding views, and do not limit the state, position, etc. when used.

[0036] For digital radiography, the object to be detected needs to be placed in a corresponding posture and be in the radiation receiving area of ​​the detector. It is also necessary for an experienced technician to set the exposure parameters according to the thickness of the object to be detected before imaging can be performed. Alternatively, the object to be detected needs to correspond to the position of the automatic exposure control room in a high degree before automatic exposure control can be used for exposure imaging. In ordinary digital radiography without automatic exposure control, if the technician assists the object to be detected in positioning inaccurately, or the exposure parameters set are inaccurate, it will cause poor imaging quality, or even imaging is unavailable and requires repeated exposure. When using automatic exposure control for imaging, if the object to be detected deviates from the automatic exposure control room, it will also affect the imaging quality, and even cause imaging to be unavailable or the object to be detected to be subjected to excessive radiation; if the automatic exposure control room is blocked by the object to be detected, the technician needs to move the object to be inspected to re-determine the position of the automatic exposure control room, and then guide the object to be detected to move to the front of the automatic exposure control room. If the object to be detected cannot move at this time, the automatic exposure control cannot be used, which will also cause the inability to obtain the radiographic image or imaging to be unavailable, or even the object to be detected to be subjected to excessive radiation.

[0037] The detector positioning auxiliary device described in this embodiment can be used for X-ray imaging, other ray imaging, two-dimensional imaging, and three-dimensional imaging. The present invention is introduced below using two-dimensional X-ray digital imaging as an example. Example

[0038] Figures 1 to 5It is a schematic structural diagram of the positioning auxiliary device of the detector of the present application. The basic idea of ​​the positioning auxiliary device of the detector is to increase the occupied area of ​​the "detector" and reduce the possibility of the "detector" being blocked by setting an extension arm extending away from the detector (or outward) around the detector, and then determine the position of the detector in combination with the preset relative position relationship between the detector and the extension arm, or the preset relative position relationship and the preset size ratio relationship, so as to facilitate the technician to determine the relative position relationship between the object to be detected and the detector according to the position of the detector, so that the technician can determine whether to directly expose, or readjust the position of the object to be detected, or remotely guide the object to be detected to adjust the position, or use automatic exposure control for radiographic imaging. The detector positioning auxiliary device provided by the present invention ensures the determinability of the detector position by increasing the area occupied by the detector and the preset relative position relationship, reduces the error rate of the exposure operation, ensures the imaging quality, and improves the imaging efficiency.

[0039] like Figures 1 to 5 As shown, the positioning auxiliary device 1 for the detector provided in this embodiment includes an extension arm 11 arranged on the detector 2 and extending in a direction away from the detector 2. The extension arm 11 and the detector 2 have a preset relative position relationship, or the extension arm 11 and the detector 2 have a preset relative position relationship and a preset size ratio relationship. The extension arm is used to determine the position of the detector according to its position and the preset relative position relationship.

[0040] The positioning auxiliary device of the detector used in this embodiment includes the extension arm 11 arranged on the detector 2 and extending in the direction away from the detector, and the extension arm and the detector have a preset relative position relationship, or the extension arm and the detector have a preset relative position relationship and a preset size ratio relationship; by arranging the extension arm extending in the direction away from the detector (extending outward) around the detector, the occupied area of ​​the "detector" is increased, and the possibility of the "detector" being blocked is reduced, and the position of the detector is determined in combination with the preset relative position relationship between the detector and the extension arm, or the preset relative position relationship and the preset size ratio relationship, so as to facilitate the technician to determine the relative position relationship between the object to be detected and the detector, so that the technician can determine whether to directly expose, or readjust the position of the object to be detected, or remotely guide the object to be detected to adjust the position, or use automatic exposure control for radiographic imaging. The present application ensures the determinability of the detector position by increasing the area occupied by the "detector", which is conducive to reducing the error rate of exposure operation, ensuring imaging quality, and improving imaging efficiency.

[0041] In this embodiment, the extension arm and the detector can have a preset relative position relationship, and the position of the detector can be directly inferred based on the preset relative position relationship; or, while the extension arm and the detector have a preset relative position relationship, the extension arm and the detector also have a preset size ratio relationship, and the position of the detector is inferred by combining the preset relative position relationship and the preset size ratio relationship.

[0042] When the extension arm and the detector only have a preset relative position relationship, the number of the extension arms is usually multiple, and the multiple extension arms are correspondingly installed on at least two sides of the detector. Figure 2 As shown, two extension arms are respectively arranged on opposite sides of the detector, and the edges of the two extension arms on one side are respectively aligned with the upper and lower sides of the detector; or as shown Figure 3 As shown, three extension arms 11 are arranged on two opposite sides of the detector, wherein two extension arms 11 arranged on one side are arranged at the upper and lower ends of the detector; or as shown Figure 4 As shown, an extension arm 11 is provided at each of the four corners of the detector. The preset relative position relationship can be set by those skilled in the art as required, so that the position relationship of the detector can be determined based on the observed extension arm, and will not be described in detail here.

[0043] When the extension arm and the detector have a preset size ratio relationship, the width and length of the detector can be inferred based on the observed width or length of the extension arm. Based on this, combined with the preset relative position relationship, only a small number of extension arms need to be observed to determine the position of the detector. In this case, a small number of extension arms are required, for example, Figure 5 As shown, only one extension arm 11 is provided and the extension arm 11 is provided in the middle of one side of the detector 2. Of course, other layouts may be provided, or other numbers of extension arms 11 may be provided. Those skilled in the art may provide such arrangements as required, and will not be described in detail here.

[0044] The positions and numbers of the extension arms and detectors listed in this embodiment are only examples and do not limit their positions and numbers. Those skilled in the art can set them as needed and will not be elaborated here.

[0045] In this embodiment, when it is necessary to determine the position of the detector according to the extension arm, if only the preset relative position relationship is present, the position of each extension arm is observed and determined, and then the position of the detector is determined in combination with the preset relative position relationship. If the preset relative position relationship and the preset size ratio relationship are present, the boundary of the detector in the width direction of the extension arm can be determined by expanding the corresponding ratio in the upward and downward directions according to the observed width of the extension arm, and then the boundary of the detector in the length direction of the extension arm can be determined according to the position of the extension arm and the size of the detector.

[0046] In this embodiment, the extension arm and the detector have a preset relative position relationship, or a preset relative position relationship and a preset size ratio relationship between the extension arm and the detector; the position of the detector can be accurately determined according to the multiple extension arms set at specific relative positions, or any number of extension arms with a preset size ratio relationship and a preset relative position relationship, and the extension arm is a physical entity with identifiability, so the position of the detector can be determined by naked eye observation, or the position of the detector in the image can be determined by taking a photo, such as by determining the coordinates of the four corners of the detector in the image or the center coordinates and length and width parameters of the detector. The diversity of the methods for determining the position of the detector is guaranteed, and the method of determining by image also helps to ensure the accuracy of the position of the detector.

[0047] like Figures 1 to 5 As shown, the extension arm 11 in this embodiment includes a base 111 connected to the edge of the detector 2, and a steering rod 112 installed corresponding to the base, and the steering rod is rotated to adjust the angle between it and the plane where the detector is located.

[0048] In this embodiment, the design of the extension arm including the base and the steering rod allows the steering rod to rotate to adjust the angle between the steering rod 112 and the plane where the detector is located, thereby coordinating the items of the radiographic inspection and the size of the object to be inspected, and increasing the scope of application of the positioning auxiliary device of the detector of the present application. For example, if the object to be inspected is covered with a large flexible coat, the overly fat coat may have a greater impact on the determination of the relative position between the object to be inspected and the detector. By making the extension arm perpendicular to the plane where the detector is located, the object to be inspected can be limited to the space formed by the extension arm, and the accuracy of the determined detector position can be improved to a certain extent, and even the accuracy of the relative position between the determined detector and the object to be inspected can be improved. For another example, if the inspection item is a three-dimensional inspection that requires the X-ray beam to be directed to the detector from different angles, it can be observed from the X-ray source, and the angle between the X-ray source and the detector can be determined according to the distortion of each of the extension arms in the observed picture.

[0049] In this embodiment, in order to reduce the factors or calculation amount that need to be considered when determining the position of the detector according to the extension arm, it is also possible to Figures 3 to 5 As shown, the plane where the axis of each extension arm is located is arranged parallel to the detector surface to ensure the accuracy of determining the position of the detector. Preferably, the upper surface of each extension arm is in the same plane as the detector surface.

[0050] like Figures 1 to 5 As shown, in this embodiment, one end of the extension arm is connected to the edge of the detector through a detachable connector, and the other end is extended in a direction away from the detector. In this embodiment, the detachable connector includes a mounting sleeve 121 that matches the shape of the side of the detector, and the extension arm is connected to the outer wall of the mounting sleeve 121.

[0051] The detachable connector in this embodiment enables the extension arm to be removed through the detachable connector when the extension arm is not needed. The detachable connector is used to connect the detector and the extension arm, making the disassembly, transportation, maintenance and replacement of the two more convenient, improving the convenience of use. A positioning auxiliary device of the detector can also be used on different detectors at different times, which also controls the cost to a certain extent.

[0052] In this embodiment, the extension arm and the mounting sleeve are relatively fixed, which limits the relative position between the extension arm and the detector to a certain extent. In order to reduce the limitation of the relative position between the extension arm and the detector by the mounting sleeve, the mounting sleeve can be annular and tightly wrapped on the side of the detector. At the same time, the mounting sleeve has a certain flexibility. While tightly wrapping on the detector, it can also move along the circumference of the side wall of the detector when subjected to sufficient external force. Or, Figure 6 As shown, a plurality of bases 111 are arranged along the circumference of the outer wall of the mounting sleeve 121. When in use, the steering rod 112 is to be installed with which one or several bases as required. Those skilled in the art can determine the material of the mounting sleeve, the number of bases, and the size of the external force required to move the mounting sleeve to cover the detector in order to adjust the relative position between the extension arm and the detector according to the number and weight of the extension arms, etc., which will not be described in detail here.

[0053] In this embodiment, the extension arm and the detector are connected by the detachable connector, which has the advantages of convenient disassembly, transportation, maintenance, or convenient use of a set of extension arms on different detectors. Of course, the extension arm and the detector can also be set as one piece, which has the advantages of preventing loss and preventing the relative position relationship between the extension arm and the detector from not meeting the preset relative position relationship. Those skilled in the art can make a choice according to their needs, and will not be described in detail here.

[0054] In order to quickly and conveniently identify the rod, an identification label is provided at one end of the rod away from the detector in this embodiment. The identification label has a specific shape, or has a specific shape and a specific size.

[0055] In this embodiment, determining the position of the detector can be determining the position of the entire detector or determining the position of the ray receiving area in the detector. For a detector in which the ray receiving area is at a certain distance from the edge of the detector housing, there are also differences in determining the preset relative position relationship and the preset size ratio relationship. When using, those skilled in the art can set the preset relative position relationship, or the preset relative position relationship and the preset size ratio relationship according to the size of the detector, the ray receiving area, etc., and will not be described in detail here.

[0056] In this embodiment, the position of the detector is usually determined by observing from the direction of the X-ray source. In most inspections, the detector and the X-ray source are set to be perpendicular, that is, the center of the X-ray beam is perpendicular to the plane where the detector is located. However, there are also some inspections that require a certain angle between the X-ray source and the detector. For example, in the establishment of a three-dimensional image using X-ray digital imaging, the X-ray beam needs to be emitted to the detector from different angles. In the case where the ray source and the detector are not perpendicular, when observing the detector from the X-ray source or extending the arm, the detector or the extension arm will be distorted to a certain extent. In order to reduce the influence of the distortion on determining the position of the detector, or to deal with the situation where the angle between the X-ray source and the detector needs to be determined, a method in which the extension arm and the detector have a certain angle can be adopted. According to the angle relationship in the preset relative position relationship between the detector and the extension arm, the angle between the ray source and the detector is determined in combination with the observed length of the extension arm. Of course, the position of the detector can also be observed from other directions instead of from the direction of the ray source. Those skilled in the art can set the orientation for observing the position of the detector as needed, and determine the position of the detector according to the observation orientation, etc., which will not be described in detail here. When observing the extension arm at the radiation source through the image, the camera can be fixed on the radiation source so that the camera moves along with the movement of the radiation source. Embodiment 2

[0057] This embodiment is an improvement on the first embodiment, and the repeated parts will not be described in detail. The detachable connector in this embodiment is different from that in the first embodiment, and the structure of the detachable connector is further described below.

[0058] like Figure 7 , Figure 8 As shown, in the positioning auxiliary device for the detector provided in this embodiment, the detachable connecting member includes a mounting card 131 disposed at one end of the extension arm 132, and the mounting card is correspondingly engaged with the side of the detector 133. The diameter of the mounting card 131 is matched with the thickness of the detector.

[0059] like Figure 7 , Figure 8 As shown, in this embodiment, the extension arm 132 is connected to the detector via the mounting card 131, thereby ensuring the freedom of the installation position to a large extent. When in use, the position of the extension arm installed on the detector can be adjusted according to the size of the object to be detected. In addition, the mounting card ensures that each extension arm is independent, which facilitates the transportation and use of the detector positioning auxiliary device. Embodiment 3

[0060] This embodiment is an improvement on the first embodiment, and the repeated parts will not be described in detail. The extension arm in this embodiment is different from that in the first embodiment, and the structure of the extension arm is further described below.

[0061] See also Fig. 9 As shown, in the positioning auxiliary device for the detector provided in this embodiment, the extension arm 31 includes an extension rod 311 installed on the side of the detector 32 and whose plane is parallel to the plane where the detector 32 is located, and a first scale 312 is provided on the rod body along the length direction of the extension rod. The first scale 312 can be set starting from the end of the extension rod connected to the detector, or can be set at a set distance from the end connected to the detector, or start from the end of the extension arm away from the detector.

[0062] In this embodiment, the position of the detector is determined according to the value (scale value) of the first scale that is not blocked. Of course, at this time, the number of extension rods 311 can be one or more. When there is one, the position of the detector is determined according to the preset relative position between the extension rod and the detector and the first scale value 312 that is not blocked. When there are multiple extension rods, if the extension rods are on each side of the detector and can be identified, the position of the detector can be directly determined according to the first scale value of the unblocked part of each extension rod; if the extension rod 311 is connected to part of the edge of the detector or the first scale 312 of only part of the extension rod 311 can be identified, the position of the detector can be determined according to the identified first scale of the extension rod and the preset installation position of the extension rod, and / or the preset size ratio relationship between the detector and the extension rod.

[0063] In this embodiment, in order to facilitate the determination of the distance between the observation position and the detector according to the width of the extension rod, and then accurately determine the position of the detector, a lateral width mark of the extension rod is set at the end of the extension rod away from the detector, the lateral mark 313. In this embodiment, in order to facilitate the reading of the first scale value, there is generally a large contrast between the color of the first scale line and the first scale value and the color of the extension rod, such as black and white, red and white, etc. The width of the extension rod can also be increased, and the size of the scale value can be limited. The color of the first scale line and the first scale value and the extension rod, as well as the size of the extension rod, the first scale line and the first scale value, etc. can be set as needed by those skilled in the art, and will not be described in detail here.

[0064] See also Fig. 9 As shown, the extension arm in this embodiment is installed corresponding to the detector through the mounting sleeve 33, and the extension rod is integrated with the detector. Of course, the extension arm can also be connected to the detector through a mounting card or other types of detachable connectors, or the extension arm can be directly fixedly connected to the detector. Those skilled in the art can make a choice according to their needs and will not be elaborated here.

[0065] In this embodiment, when acquiring an image of the object to be detected in front of the detector, and determining the position of the detector and the relative position between the detector and the object to be detected based on the image, the ratio between the image size and the actual object size can also be determined based on the length of the first scale exposed by each of the extension rods in the image and the area occupied in the image, and even the angle between the image capturing device and the detector can be determined based on the ratio in which the length of the first scale exposed by each of the extension rods is reduced in the image, thereby achieving accurate determination of the position of the detector. Embodiment 4

[0066] This embodiment is an improvement on the basis of the first or second embodiment, and the repeated parts are not described in detail. The extension arm in this embodiment is different from that in the first embodiment, and the structure of the extension arm is further described below.

[0067] See also Fig.10 , Fig.11 , which are all structural schematic diagrams of the positioning auxiliary device of the detector provided in this embodiment; Figure 8 The extension arm 41 is correspondingly connected to the detector 42 through the mounting housing; Fig. 9 The extension arm 41 is connected to the detector 42 via a mounting card, which will be further described below in conjunction with the accompanying drawings.

[0068] See also Fig.10 As shown, in the positioning auxiliary device for the detector provided in this embodiment, the extension arm 41 includes a first rod body 411 and a second rod body 412 which are arranged at an angle, and the first rod body 411 and the second rod body 412 are arranged parallel to the plane where the detector 42 is located; the first rod body 411 and / or the second rod body 412 has a preset length and a preset width, and the second rod body 412 is provided with a second scale 4111.

[0069] See also Fig.11 As shown, in the positioning auxiliary device for the detector provided in this embodiment, the extension arm 41 includes a first rod body 411 and a second rod body 412 arranged at an angle, and the first rod body 411 and the second rod body 412 are arranged parallel to the plane where the detector 42 is located; and a second scale 4111 is provided on the first rod body and the second rod body.

[0070] In this embodiment, the angle between the first rod and the second rod can be any angle value. The first rod and the second rod are set at an angle, which increases the area occupied by the extension arm and facilitates the rapid identification of the extension arm. Preferably, the first rod is perpendicular to the second rod. When in use, the extension arm is placed at the corner of the detector, and the first rod and the second rod are parallel to the two sides adjacent to the detector; so that the detector can be determined in which "quadrant" of the area divided by the extension arm through one extension arm, and the position of the detector can be determined by combining other known information, reducing the demand for the number of extension arms and helping to reduce costs.

[0071] like Fig.10 As shown, the right side of the first rod is collinear with the right side of the detector, and the upper side of the second rod is collinear with the upper side of the detector. Fig.11As shown, the left side of the first rod body is collinear with the right side of the detector, and the upper side of the second rod body is collinear with the upper side of the detector. This collinear relationship is part of the preset relative position relationship. Through this design, only one extension arm is needed to determine the position of the adjacent two sides of the detector, which helps to quickly and accurately determine the position of the detector.

[0072] In this embodiment, in order to facilitate rapid identification of the extension arm from the direction of the X-ray source and rapid determination of the boundary of the detector, the first rod body and the second rod body may be parallel to the plane where the detector is located, and the first rod body and / or the second rod body may be provided with the second scale 4111. The distance between the X-ray source and the detector may be determined by the second scale, and the position of the detector may be determined by combining the preset relative position relationship and the size of the detector, or the position of the detector may be determined by combining the preset relative position relationship and the preset size ratio relationship; the second scale cooperates with the extension arm, so that only a small number of the extension arms are required to accurately determine the position of the detector. Embodiment 5

[0073] This embodiment further provides a detector, wherein a positioning auxiliary device for the detector as described in any one of Embodiments 1 to 4 is installed on the side of the detector body. The repeated parts will not be described in detail here, and the structure of the detector body will be further described below.

[0074] like Fig.12 As shown, the detector provided in this embodiment includes a ray sensing area 501, a dose sensing processing module 502, an automatic exposure control area input module 503 and a stop signal output module 504, the automatic exposure control area input module and the stop signal output module are electrically connected to the dose sensing processing module respectively, and the ray sensing area is electrically connected to the dose sensing processing module.

[0075] In this embodiment, the automatic exposure control area input module 503 is used to send the automatic exposure control area to the dose sensing processing module, and the dose sensing processing module 502 is used to extract the radiation dose received by the corresponding area from the radiation sensing area according to the received automatic exposure control area, and judge whether the radiation dose received by the corresponding area meets the exposure dose threshold, and when the exposure dose threshold is reached, send a stop signal to the stop signal output module; the stop signal output module is used to output a stop signal. Specifically, the automatic exposure control area input module 503 is used to select the automatic exposure control area from the radiation sensing area 501, and send the selected automatic exposure control area to the dose sensing processing module 502; the dose sensing processing module is used to judge whether the radiation dose received by the automatic exposure control area meets the exposure dose threshold, and send a stop signal when the exposure dose threshold is reached.

[0076] In this embodiment, when the dose sensing processing module can extract the parameters of the ray sensing area according to the coordinates, the automatic exposure control area input module can input the automatic exposure control area by inputting the coordinate parameters, and the dose sensing processing module selects the part corresponding to the coordinate parameters of the automatic exposure control area from the ray sensing area, and determines whether the ray dose received by the part meets the exposure dose threshold. The exposure dose threshold can be a threshold set according to the average grayscale, or a threshold set according to the grayscale. Of course, the exposure dose threshold can also be a threshold corresponding to other formal parameters, such as a threshold set by accumulating X-ray signals or electrical signals converted from X-ray signals. Those skilled in the art can set the type of exposure dose threshold and the range of the threshold as needed, which will not be elaborated here.

[0077] After analysis, the applicant found that, whether it is an external automatic exposure control panel or a detector with an ionization chamber, the relative position between the automatic exposure control area and the detector is fixed and cannot be freely adjusted within the radiation receiving area of ​​the detector; at the same time, because the object to be detected between the detector and the radiation source will block the automatic exposure control chamber and even the radiation receiving area of ​​the detector, this has caused the high degree of reliance on the experience of the technician for radiographic inspection. Even if experienced technicians assist in positioning the object to be detected, it is easy to cause problems such as poor imaging quality or low imaging efficiency. At the same time, it also causes problems such as limited application of automatic induction exposure. Therefore, the present application sets up a detector that can adjust the automatic exposure control area at will. The detector provided in this embodiment has a detector positioning auxiliary device. When the radiation sensing area of ​​the detector is blocked, the position of the detector can be determined by the extension arm in the positioning auxiliary device of the detector, and then the relative position between the detector and the object to be detected can be determined, and then the position of the part to be detected is selected from the radiation sensing area of ​​the detector in combination with the automatic exposure control area input module for automatic induction exposure. When the position of the detector can be determined based on the positioning auxiliary device of the detector, the automatic exposure control area can be set at any area of ​​the detector radiation sensing area at any time, so that the operation process of changing the automatic exposure control can be realized, and the object to be detected will be adjusted according to the position of the automatic exposure control chamber, so that the object to be detected matches the position of the ionization chamber, and the automatic exposure control area is selected according to the position of the object to be detected. The imaging quality is effectively ensured, and the convenience of operation is also ensured. Embodiment 6

[0078] This embodiment provides a detector positioning system, including the positioning auxiliary device of the detector as described in any one of embodiments 1 to 5. The structure and use process of the positioning auxiliary device of the detector are as described in the above embodiments, and the repeated contents are not described here. The detector positioning system is briefly described below.

[0079] See also Fig.13 As shown, the detector positioning system provided in this embodiment includes the positioning auxiliary device of the detector as described in any of the above items, and also includes a processor 601, an image collector 602 and a display 603; the image collector is used to capture the image of the object to be detected of the positioning auxiliary device of the detector after the object to be detected is in front of the detector; the processor is used to identify the image of the object to be detected, and determine the image detector area corresponding to the detector in the image of the object to be detected according to the area where the positioning auxiliary device of the detector is located in the image of the object to be detected; the display is used to display the image of the object to be detected. The image collector and the display are electrically connected to the processor respectively.

[0080] The detector positioning system provided in this embodiment also includes an automatic exposure control area input device electrically connected to the processor, and is used to select an automatic exposure control area in the image detector area; the display is also used to mark and display the automatic exposure control area in the image of the object to be detected; the processor is electrically connected to the detector, extracts the automatic exposure area corresponding to the automatic exposure control area in the radiation sensing area of ​​the detector, and determines whether the radiation dose received by the automatic exposure area meets the exposure dose threshold, and sends a stop signal when the exposure dose threshold is reached.

[0081] In this embodiment, when the processor can extract parameters from the radiation sensing area of ​​the detector according to the coordinates, the automatic exposure control area input device can input the automatic exposure control area by inputting the coordinate parameters, and the processor selects a portion corresponding to the coordinate parameters of the automatic exposure control area from the radiation sensing area of ​​the detector, and determines whether the radiation dose received by the portion meets the exposure dose threshold. The exposure dose threshold can be a threshold set according to the average grayscale, or a threshold set according to the grayscale, or a threshold corresponding to other formal parameters, such as a threshold set by accumulating X-ray signals or electrical signals converted from X-ray signals, and those skilled in the art can set the type of exposure dose threshold and the range of the threshold as needed, which will not be described in detail here.

[0082] In this embodiment, the extension arm is arranged parallel to the plane where the detector is located, and the image collector is arranged on the X-ray source.

[0083] This embodiment obtains an image of the object to be detected after it is in front of the detector as the image of the object to be detected, and then obtains the area occupied by the extension arm through image recognition. The position of the detector in the image can be determined in combination with the known preset relative position relationship between the extension arm and the detector, or the preset relative position relationship and the preset size ratio relationship. In combination with the object to be detected captured in the image, the relative position between the object to be detected and the detector is determined. According to the relative position between the object to be detected and the detector, it can be determined whether the object to be detected needs to be moved further or can be directly exposed for imaging. For equipment that can freely set the automatic exposure control area in the detector's radiation receiving area, the automatic exposure control area can also be reselected according to the part to be detected to ensure the matching degree between the automatic exposure control area and the object to be detected, so as to obtain an image with better imaging effect.

[0084] The image of the object to be detected in this embodiment is a real-time image of the object to be detected in front of the detector, which is an image taken after the object to be detected is in front of the detector. It can be an image taken after the object to be detected is correctly positioned according to the shooting position positioning requirements, or it can be an image before positioning. If the real-time image before positioning is taken, the positioning adjustment method of the object to be detected can also be determined based on the real-time image. Preferably, the detection area of ​​the detector is determined using the real-time image after the object to be detected is correctly positioned. Of course, at this time, the correct positioning of the object to be detected means that the posture of the object to be detected conforms to the positioning method, and there is no need to limit the relative position between the object to be detected and the detector. It is only necessary for the object to be detected to be in the radiation sensing area of ​​the detector.

[0085] The present invention realizes that, when the position of the detector can be determined based on the positioning auxiliary device of the detector, the automatic exposure control area can be set at any area of ​​the detector radiation sensing area at any time, so that the operation process of changing the automatic exposure control can be realized, and the object to be detected is adjusted according to the position of the automatic exposure control room so that the object to be detected matches the position of the automatic exposure control room, and the automatic exposure control area is selected according to the position of the object to be detected. The imaging quality is effectively ensured, and the convenience of operation is also ensured.

[0086] It should be understood by those skilled in the art that the exemplary components, systems and methods described in conjunction with the embodiments disclosed herein can be implemented in hardware, software or a combination of the two. Whether it is performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium or transmitted on a transmission medium or a communication link via a data signal carried in a carrier. "Machine-readable medium" can include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, and the like. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0087] It should also be noted that the exemplary embodiments mentioned in the present invention describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or in a different order from the embodiments, or several steps can be performed simultaneously.

[0088] In the present invention, features described and / or illustrated for one embodiment may be used in the same manner or in a similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0089] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the embodiments of the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A positioning auxiliary device for a detector, characterized in that: It comprises an extension arm which is arranged on the detector and extends in a direction away from the detector. There is a preset relative position relationship between the extension arm and the detector, or there is a preset relative position relationship and a preset size ratio relationship between the extension arm and the detector.

2. The positioning auxiliary device for the detector according to claim 1, characterized in that: The extension arm comprises a base connected to the edge of the detector and a steering rod installed to the base. The steering rod is rotated to adjust the angle between the steering rod and the plane where the detector is located.

3. The positioning auxiliary device for the detector according to claim 1, characterized in that: The extension arm comprises an extension rod installed on the side of the detector and whose plane is parallel to the plane where the detector is located. A first scale is arranged on the rod body of the extension rod along the length direction of the extension rod.

4. The detector positioning auxiliary device according to claim 1, characterized in that: The extension arm includes a first rod and a second rod arranged at an angle, and the first rod and / or the second rod are arranged parallel to the plane where the detector is located; the length of the first rod and / or the second rod is a preset length, or the first rod and / or the second rod is provided with a second scale.

5. The detector positioning auxiliary device according to any one of claims 1 to 4, characterized in that: One end of the extension arm is connected to the edge of the detector via a detachable connector, and the other end is extended in a direction away from the detector.

6. The detector positioning auxiliary device according to claim 5, characterized in that: The detachable connector includes a mounting sleeve that matches the shape of the detector side, and the extension arm is connected to the outer wall of the mounting sleeve; or, the detachable connector includes a mounting card arranged at one end of the extension arm, and the mounting card is correspondingly engaged with the side of the detector.

7. The detector positioning auxiliary device according to claim 5, characterized in that: A plurality of extension arms arranged at intervals are correspondingly installed on the sides of the detector.

8. A detector, characterized in that: A positioning auxiliary device for the detector as claimed in any one of claims 1 to 7 is installed on the side of the detector body.

9. The detector according to claim 8, characterized in that: The detector includes a ray sensing area, a dose sensing processing module, an automatic exposure control area input module and a stop signal output module. The automatic exposure control area input module and the stop signal output module are electrically connected to the dose sensing processing module respectively, and the ray sensing area is electrically connected to the dose sensing processing module.

10. A detector positioning system, characterized in that: It comprises a positioning auxiliary device for a detector as claimed in any one of claims 1 to 7, a processor and an image collector for photographing the positioning auxiliary device for the detector; the image collector is electrically connected to the processor.

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