CN117169254A - X-ray control method and device for detection equipment and detection equipment - Google Patents
X-ray control method and device for detection equipment and detection equipment Download PDFInfo
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Abstract
The application provides an X-ray control method and device for detecting equipment and the detecting equipment, wherein the method is used for detecting articles on a high-speed moving conveyor belt and comprises the following steps: when the existence of the object to be detected on the conveyor belt is not detected within a preset time period, converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current, wherein the standby current is smaller than the working current; when the existence of the object to be detected on the conveyor belt is detected, the tube current of the X-ray emitter is converted from the standby current to the working current. According to the application, when no object to be detected is detected, the standby current is switched by the working current, and when the object to be detected is detected, the working current is switched by the standby current, so that the service life of the radiation source is prolonged while the radiation source is kept continuously on under the premise of meeting the high-speed on-line detection, the equipment volume is reduced, and the energy consumption is reduced.
Description
Technical Field
The application relates to the technical field of X-ray foreign matter detection, in particular to an X-ray control method and device for detection equipment and the detection equipment.
Background
At present, the X-ray detection technology is widely applied to the field of online detection of industrial production lines, and the structure and the state of the inside of a product can be clearly seen through an X-ray transmission image, so that possible foreign matters or defects of the product can be found. Taking a food production line as an example, metal, ceramic sheets, glass sheets or stones and the like are mixed in bagged or bulk food, the images are imaged by X-ray scanning, then the images are identified by an image processing program, and when foreign matters are found, the equipment automatically eliminates the products containing the foreign matters.
The on-line X-ray detection equipment is generally erected on a production line, the speed is about 30 meters/minute to 120 meters/minute, and the passing speed of the object to be detected is relatively high. In a production line, there is often a periodic passage of the object to be examined, i.e. the X-ray detection device is not always in the condition of detecting the pattern. But current high-speed online X-ray detection devices typically employ a means of keeping the source on continuously, since the source typically takes several hundred milliseconds from turning on to stabilizing the beam, resulting in the product suddenly reaching the detection device and the system not turning on the source.
The high-speed online X-ray detection device adopts a mode of keeping the ray source continuously open, and solves the problem that the ray source is opened when an object to be detected suddenly passes through, but unnecessary energy consumption is generated and the service life of the ray source is shortened.
Disclosure of Invention
The X-ray control method, the X-ray control device and the X-ray control equipment for the detection equipment provided by the application have the advantages that the energy consumption is reduced and the service life of the ray source is prolonged while the ray source is kept to be continuously opened.
The technical scheme provided by the application is as follows:
in a first aspect, the application discloses a method for controlling X-rays of a detection device for detecting objects on a high-speed moving conveyor belt, comprising the steps of:
when the existence of the object to be detected on the conveyor belt is not detected within a preset time period, converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current, wherein the standby current is smaller than the working current;
when the existence of the object to be detected on the conveyor belt is detected, the tube current of the X-ray emitter is converted from the standby current to the working current.
According to the embodiment, when no object to be detected is detected, the standby current is switched by the working current, and when the object to be detected is detected, the working current is switched by the standby current, so that the service life of the radiation source is prolonged while the radiation source is kept continuously opened on the premise of meeting the high-speed online detection, the equipment volume is reduced, and the energy consumption is reduced.
In some embodiments, the standby current is determined based on a time for which the current stabilizes after the standby current converts the operating current and a distance from an entrance of the detection device to an X-ray detection location.
In some embodiments, the time for stabilizing the current is determined by the speed of transporting the object to be tested by the conveyor belt and the distance from the entrance of the detection device to the X-ray detection position, and the calculation formula is as follows:
T≤L/S；
wherein L is the distance from the entrance of the detection device to the X-ray detection position, S is the speed of the conveying belt for conveying the object to be detected, and T is the time for stabilizing the current.
In some embodiments, the time for the current to stabilize, and the difference between the standby current and the operating current are inversely proportional to each other, and the calculation formula is:
T＝k/(Cw-Ci)+b；
wherein T is the time for which the current is stable, and k and b are parameters calculated by experimental fitting; cw is the operating current; ci is the standby current.
In some embodiments, the standby current is determined according to the time for stabilizing the current after the standby current converts the working current and the distance from the entrance of the detection device to the X-ray detection position, and the calculation formula is as follows:
Ci≤Cw-K/(L/S-b)；
wherein k and b are parameters calculated by experimental fitting; cw is the operating current; ci is the standby current; s is the speed of the conveying belt for conveying the object to be detected; t is the time for which the current is stable.
In some embodiments, the operating current ranges from 1 to 10mA.
In some embodiments, switching of standby current and operating current in the tube current of the X-ray emitter is controlled by a tube current control circuit.
According to a second aspect of the present application, the present application discloses an X-ray control apparatus of a detection device, comprising:
the detection switching module is used for converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current when the object to be detected on the conveyor belt is not detected within the preset time length, and the standby current is smaller than the working current;
the detection switching module is also used for converting the tube current of the X-ray emitter from standby current to working current when detecting that the object to be detected exists on the transmission belt.
In some embodiments, further comprising:
and the determining module is used for determining the standby current according to the time for stabilizing the current after the standby current is converted into the working current and the distance from the inlet of the detection equipment to the X-ray detection position.
According to a third aspect of the present application, the present application discloses a detection apparatus, including a main frame, on which a detection channel is provided, through which a transmission belt passes, and in which an X-ray emitter and an X-ray receiver located on both sides of the transmission belt are provided;
the photoelectric switch is arranged at the inlet of the detection channel and is used for detecting whether an object to be detected exists on the conveying belt;
the controller is connected with the photoelectric switch and used for converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current when the object to be detected on the transmission belt is not detected within a preset time period, and the standby current is smaller than the working current; and converting the tube current of the X-ray emitter from the standby current to the working current when the existence of the object to be detected on the conveyor belt is detected.
Compared with the prior art, the application has at least the following beneficial effects:
according to the application, when no object to be detected is detected, the standby current is switched by the working current, and when the object to be detected is detected, the working current is switched by the standby current, so that the service life of the radiation source is prolonged while the radiation source is kept continuously on under the premise of meeting the high-speed on-line detection, the equipment volume is reduced, and the energy consumption is reduced.
Drawings
The above features, technical features, advantages and implementation modes of the present application will be further described in the following description of preferred embodiments with reference to the accompanying drawings in a clear and understandable manner.
FIG. 1 is a schematic flow chart of an embodiment of an X-ray control method for a detection device according to the present application;
FIG. 2 is a schematic structural diagram of an embodiment of an X-ray control device for a detecting apparatus according to the present application;
fig. 3 is a schematic structural diagram of an embodiment of a detection device provided by the present application.
Reference numerals illustrate:
the device comprises a detection switching module 10, a determination module 20, an entrance photoelectric switch 30, a controller 40, an X-ray generator 50, an X-ray collimation slit 60 and an X-ray receiver 70.
Detailed Description
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will explain the specific embodiments of the present application with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the application, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
For the sake of simplicity of the drawing, the parts relevant to the present application are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
Relationship between current and lifetime of the radiation source: the core of the X-ray source is a cathode and an anode. Electrons can be pulled from the cathode after tube voltage is applied to the bulb of the radiation source, then the cathode electrons are accelerated under the action of high-voltage magnetic field, strike the anode target and transfer the kinetic energy to atoms on the target, wherein about 1% of the energy is converted into X-rays to be released. According to this principle, the tube current of the source is proportional to the number of electrons coming out of the cathode, and the more electrons are pulled out, the shorter the lifetime of the cathode. Therefore, the bulb of the normal ray source is generally about 8000-10000 hours, and when the cathode can not be pulled out of the electron any more, the bulb of the ray source can not be used any more.
Relationship between entrance photoelectric switch and collimation slit of on-line X-ray detection device: as shown in fig. 3, the on-line X-ray detection has an entrance photoelectric switch 30 and a ray collimation slit 60, and when the object to be detected passes through, the entrance photoelectric switch 30 can detect that the object passes through first, and then the object to be detected is imaged through the ray collimation slit 60. If the X-ray generator 50 is turned on again when the object passes, the opto-electronic switch needs to be mounted in a very forward position. Taking the current test example, the conveyor works at a state of 2 m/s, the X-ray generator 50 takes about 700ms from 60kV/0mA to 60kV/5mA to be stable, if the radiation source is turned on again when the object to be detected arrives, the distance between the entrance photoelectric switch 30 and the radiation source collimation slit 60 is at least 1.4 m, the equipment is huge, and the equipment is not operable in many industrial sites.
Since the conveyor speed is too high for high-speed on-line inspection, if the product arrives and then turns on the source, the source takes at least several hundred milliseconds to stabilize, and it is obviously not enough to perform the inspection, the source is kept on continuously, but this method solves the problem that the source is not turned on when the object to be inspected suddenly passes, but causes unnecessary energy consumption and shortens the life of the source.
In one embodiment, referring to fig. 1 of the drawings, the method for controlling X-rays of a detection device provided by the present application includes the steps of:
s110, when the existence of the object to be detected on the conveyor belt is not detected within the preset time, converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current, wherein the standby current is smaller than the working current;
specifically, after the detection device is started and detected, if the entrance photoelectric switch does not detect the object to be detected on the transmission belt all the time within a period of time, the tube current is converted from the working current to the standby current while the high voltage of the radiation source tube is kept unchanged, namely, the current is reduced, so that the number of electrons pulled out of the cathode of the radiation source is obviously reduced, and the service life of the radiation source is prolonged.
S120, when detecting that the object to be detected exists on the conveyor belt, converting the tube current of the X-ray emitter from standby current to working current.
Specifically, when the entrance photoelectric switch detects that a new object to be detected enters, the tube current of the ray source is immediately regulated to be working current from standby current, and the normal detection state can be returned in a very short time, so that the detection speed is ensured.
The method for maintaining the high voltage of the ray source tube and reducing the current of the ray source tube is adopted, so that the time for the ray source to enter the working state can be shortened, and the service life can be prolonged by reducing the current according to the relation between the current of the ray source and the service life.
According to the thought, the radiation source is regulated, and the detection speed is ensured and the service life is prolonged by adopting a method of high and low tube current. Specifically, the tube current control circuit is adjusted, and the test result shows that the tube current control circuit can be rapidly switched between low tube current and high tube current, and the switching speed is within tens of milliseconds.
Taking the current test as an example, the test can be stable only by about 30-50 ms from 60kV/1mA to 60kV/5 mA. When the speed of the conveyor is 2 m/s, the photoelectric switch for detecting the object to be detected and the ray source collimation slit can be shortened from 1.4 m to 0.1 m, so that the device has practical value.
Further, the standby current is determined based on the time for which the current is stabilized after the standby current is converted into the operating current and the distance from the entrance of the detecting device to the X-ray detecting position.
Further, the time for stabilizing the current is determined by the speed of transporting the object to be measured by the conveyor belt and the distance from the entrance of the detecting device to the X-ray detecting position, and the calculation formula is as follows:
T≤L/S；
wherein L is the distance from the entrance of the detection device to the X-ray detection position, S is the speed of the conveying belt for conveying the object to be detected, and T is the time for stabilizing the current.
Further, the time for stabilizing the current and the difference value between the standby current and the working current are inversely proportional, and the calculation formula is as follows:
T＝k/(Cw-Ci)+b；
wherein T is the time for which the current is stable; k and b are parameters calculated by experimental fitting; cw is the operating current; ci is the standby current.
According to the time of current stabilization after standby current conversion working current and the distance from the detection device entrance to the X-ray detection position, determining the standby current, wherein the calculation formula is as follows:
Ci≤Cw-k/(L/S-b)；
wherein k and b are parameters calculated by experimental fitting; cw is the operating current; ci is standby current; s is the speed of the conveying belt for conveying the object to be detected; t is the time for which the current is stable.
Further, the operating current ranges from 1mA to 10mA.
Further, switching of standby current and operating current in the tube current of the X-ray emitter is controlled by a tube current control circuit.
According to the embodiment, when no article to be detected is detected, the standby current is switched by the working current, and when the article to be detected is detected, the working current is switched by the standby current, so that the service life of the radiation source is prolonged while the radiation source is kept continuously opened on the premise of meeting the high-speed online detection, the equipment volume is reduced, and the energy consumption is reduced.
In one embodiment, referring to fig. 2 of the drawings, the present application provides an X-ray control apparatus for a detection device, based on the same technical concept, including: the switching module 10 is detected.
The detection switching module 10 is used for converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current when the object to be detected on the conveyor belt is not detected within the preset time period, wherein the standby current is smaller than the working current;
specifically, after the detection device starts the detection, if the detection switching module 10 does not detect that the object to be detected exists on the transmission belt for a period of time, the detection switching module 10 converts the tube current from the working current to the standby current while maintaining the high voltage of the radiation source tube, namely, the current is reduced, so that the number of electrons pulled out of the cathode of the radiation source is obviously reduced, and the service life of the radiation source is prolonged.
The detection switching module 10 is further configured to convert a tube current of the X-ray emitter from a standby current to an operating current when detecting that the object to be detected exists on the conveyor belt.
Specifically, when the detection switching module 10 detects that a new object to be detected is entered, the detection switching module 10 immediately adjusts the tube current of the radiation source from the standby current to the working current, and the radiation source can return to the normal detection state in a very short time, so that the detection speed is ensured.
According to the embodiment, when the detection switching module 10 detects that no article to be detected exists, the detection switching module 10 switches the working current to the standby current, and when the detection switching module 10 detects the article to be detected, the detection switching module 10 switches the standby current to the working current, so that the service life of the radiation source is prolonged while the radiation source is kept continuously opened on the premise of meeting the high-speed online detection, the equipment volume is reduced, and the energy consumption is reduced.
In one embodiment, the detection device X-ray control apparatus further comprises:
a determining module 20, configured to determine the standby current according to the time for which the current is stable after the standby current converts the operating current and the distance from the entrance of the detecting device to the X-ray detecting position.
Specifically, the determining module 20 determines the time for stabilizing the current by the speed of transporting the object to be measured by the conveyor belt and the distance from the entrance of the detecting device to the X-ray detecting position, and the calculation formula is as follows:
T≤L/S；
wherein L is the distance from the entrance of the detection device to the X-ray detection position, S is the speed of the conveying belt for conveying the object to be detected, and T is the time for stabilizing the current.
The time of current stabilization and the difference value between standby current and working current are inversely proportional, and the calculation formula is as follows:
T＝k/(Cw-Ci)+b；
wherein T is the time for which the current is stable; k and b are parameters calculated by experimental fitting; cw is the operating current; ci is the standby current.
The determining module 20 determines the standby current according to the time of current stabilization after the standby current is converted into the operating current and the distance from the entrance of the detecting device to the X-ray detecting position, and the calculation formula is as follows:
Ci≤Cw-k/(L/S-b)；
wherein k and b are parameters calculated by experimental fitting; cw is the operating current; ci is standby current; s is the speed of the conveying belt for conveying the object to be detected; t is the time for which the current is stable.
In one embodiment, referring to fig. 3 of the drawings, the application also discloses a detection device, comprising:
a main frame, on which a detection channel is provided, through which the conveyor belt passes, and in which an X-ray emitter 50 and an X-ray receiver 70 are provided on both sides of the conveyor belt;
a photoelectric switch 30, which is installed at the entrance of the detection channel and is used for detecting whether the object to be detected exists on the transmission belt;
the controller 40 is connected with the photoelectric switch and is used for converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current when the object to be detected on the transmission belt is not detected within a preset time period, wherein the standby current is smaller than the working current; and converting the tube current of the X-ray emitter from standby current to working current when detecting that the object to be detected exists on the conveyor belt.
In one embodiment, the present application provides a computer readable storage medium storing a control program for implementing the detection apparatus X-ray control method as described above when executed by a processor. The aspects of the present application, or portions thereof, may be embodied in the form of a software product stored on a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to various method embodiments of the present application. The computer readable storage medium includes various media capable of carrying computer program code, such as a usb disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-only Memory (ROM), a random access Memory (RAM, randomAccess Memory), and the like.
Because all the technical solutions of all the embodiments are adopted when the X-ray control program of the detection device is executed by the processor, at least all the beneficial effects brought by all the technical solutions of all the embodiments are provided, and the description is omitted herein.
It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (10)
1. An X-ray control method of a detecting apparatus for detecting an article on a high-speed moving conveyor belt, comprising the steps of:
when the existence of the object to be detected on the conveyor belt is not detected within a preset time period, converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current, wherein the standby current is smaller than the working current;
when the existence of the object to be detected on the conveyor belt is detected, the tube current of the X-ray emitter is converted from the standby current to the working current.
2. The X-ray control method according to claim 1, wherein the standby current is determined based on a time for which the current is stabilized after the standby current is converted into the operating current and a distance from an entrance of the detection device to an X-ray detection position.
3. The X-ray control method of a detection apparatus according to claim 2, further comprising: the time for stabilizing the current is determined by the speed of transporting the object to be detected by the conveyor belt and the distance from the inlet of the detection device to the X-ray detection position, and the calculation formula is as follows:
T≤L/S；
wherein L is the distance from the entrance of the detection device to the X-ray detection position; s is the speed of the conveying belt for conveying the object to be detected; t is the time for which the current is stable.
4. A method of controlling an X-ray apparatus according to claim 3, wherein the standby current is inversely proportional to the difference in the operating current and the time for which the current is stable, and the calculation formula is:
T＝k/(Cw-Ci)+b；
wherein T is the time for which the current is stable; k and b are parameters calculated by experimental fitting; cw is the operating current; ci is the standby current.
5. The method according to claim 4, wherein the standby current is determined according to a time for which the current is stable after the standby current is converted into the operating current and a distance from an entrance of the detection device to an X-ray detection position, and a calculation formula is as follows:
Ci≤Cw-K/(L/S-b)；
wherein k and b are parameters calculated by experimental fitting; cw is the operating current; ci is the standby current; s is the speed of the conveying belt for conveying the object to be detected; t is the time for which the current is stable.
6. The method of claim 1, wherein the operating current is in the range of 1-10mA.
7. The X-ray control method according to claim 1, wherein switching of standby current and operating current in a tube current of the X-ray emitter is controlled by a tube current control circuit.
8. An X-ray control device for detecting articles on a high-speed moving conveyor belt, comprising:
the detection switching module is used for converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current when the object to be detected on the conveyor belt is not detected within the preset time length, and the standby current is smaller than the working current;
the detection switching module is also used for converting the tube current of the X-ray emitter from standby current to working current when detecting that the object to be detected exists on the transmission belt.
9. The X-ray control apparatus of claim 1, further comprising:
and the determining module is used for determining the standby current according to the time for stabilizing the current after the standby current is converted into the working current and the distance from the inlet of the detection equipment to the X-ray detection position.
10. A detection apparatus, characterized by comprising:
the main frame is provided with a detection channel, the transmission belt passes through the detection channel, and an X-ray emitter and an X-ray receiver which are positioned at two sides of the transmission belt are arranged in the detection channel;
the photoelectric switch is arranged at the inlet of the detection channel and is used for detecting whether an object to be detected exists on the conveying belt;
the controller is connected with the photoelectric switch and used for converting the tube current of the X-ray emitter used for detecting the object to be detected by the detection equipment from working current to standby current when the object to be detected on the transmission belt is not detected within a preset time period, and the standby current is smaller than the working current; and converting the tube current of the X-ray emitter from the standby current to the working current when the existence of the object to be detected on the conveyor belt is detected.
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| CN202311111308.9A CN117169254A (en) | 2023-08-31 | 2023-08-31 | X-ray control method and device for detection equipment and detection equipment |
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| CN202311111308.9A CN117169254A (en) | 2023-08-31 | 2023-08-31 | X-ray control method and device for detection equipment and detection equipment |
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| CN117169254A true CN117169254A (en) | 2023-12-05 |
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| CN202311111308.9A Pending CN117169254A (en) | 2023-08-31 | 2023-08-31 | X-ray control method and device for detection equipment and detection equipment |
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