Flying spot scanning device, imaging device, adjusting method and system and readable storage medium

Abstract

The invention discloses a flying spot scanning device, an imaging device, an adjusting method and system and a readable storage medium, relates to the field of safety detection, and is used for improving the imaging quality of the flying spot scanning device. The flying spot scanning device comprises a base, a driving mechanism, a transmission mechanism, a flywheel, a detection mechanism and a control assembly. The base is configured to provide support; the driving mechanism is mounted on the base and is supported by the base; the transmission mechanism is installed on the base and supported by the base. The transmission mechanism is in driving connection with the driving mechanism so as to rotate under the driving of the driving mechanism; the flywheel is in driving connection with the transmission mechanism; the detection mechanism comprises a vibration detection assembly; the vibration detection assembly is installed on the transmission mechanism. The control assembly is electrically connected with the detection mechanism, and the control assembly is configured to calculate whether vibration of the flywheel in the moving process meets the requirement or not according to the amplitude detected by the vibration detection assembly. According to the technical scheme, scanning imaging can only be performed when flywheel vibration meets requirements, so that the imaging quality can be ensured.

Description

Technical Field

[0001] The present invention relates to the field of safety detection, and in particular to a flying spot scanning device, an imaging device, an adjustment method, a system and a readable storage medium. Background Art

[0002] The inspection of goods / vehicles carrying contraband (such as drugs, explosives, etc.) is an important task in the security field. At present, the most effective and popular security inspection technology for goods / vehicles is X-ray imaging technology. From the technical principle, X-ray imaging technology is divided into the following three categories: transmission type, backscatter type and transmission-backscatter combination.

[0003] High-energy X-rays have strong penetrating power, and the perspective imaging technology of high-energy X-rays has a good inspection effect on heavy goods. However, high-energy X-rays are not effective in detecting prohibited items such as drugs and explosives with low atomic numbers and low material density.

[0004] X-ray backscatter imaging technology detects materials based on the detection of Compton backscatter signals. Compared with metal materials, contraband with low atomic number and low density (such as drugs, explosives, etc.) has a higher Compton scattering cross section and can produce stronger scattering signals. Therefore, X-ray backscatter technology is particularly suitable for detecting contraband such as drugs and explosives, and has become a widely used contraband detection technology in the security inspection field.

[0005] X-ray backscattering technology uses point X-rays to hit an object and uses a large area detector to collect scattered signals to form an image. From the perspective of the imaging principle of X-ray backscattering technology, obtaining stable and reliable point X-rays is one of the key technologies for backscattering imaging. Ways to obtain point X-rays include: flywheel device, chopper wheel structure and drum structure. Among them, the flywheel device has the characteristics of simple structure, small size and light weight, and is the most commonly used mechanical structure for backscattering technology.

[0006] The inventors have found that the prior art has at least the following problems: the stability and reliability of the flywheel operation directly affect the image quality and reliability of the backscatter imaging system. Due to the high speed and large inertia of the flywheel, vibration and impact are inevitably caused during operation, and the imaging quality of the flying spot scanning device needs to be improved. Summary of the invention

[0007] The present invention provides a flying spot scanning device, a flying spot imaging device, a flying spot scanning device dynamic balance adjustment method and adjustment system and a readable storage medium, which are used to improve the imaging quality of the flying spot scanning device.

[0008] The embodiment of the present invention further provides a flying spot scanning device, comprising:

[0009] a base configured to provide support;

[0010] A driving mechanism, mounted on the base and supported by the base;

[0011] A transmission mechanism is mounted on the base and supported by the base; the transmission mechanism is drivingly connected to the driving mechanism so as to rotate under the driving of the driving mechanism;

[0012] A flywheel is drivingly connected to the transmission mechanism so as to rotate along with the rotation of the transmission mechanism;

[0013] A detection mechanism, comprising a vibration detection component; the vibration detection component is installed on the transmission mechanism to detect the amplitude of the transmission mechanism; and

[0014] A control component is electrically connected to the detection mechanism, and is configured to calculate whether the vibration during the movement of the flywheel meets the requirements according to the amplitude detected by the vibration detection component.

[0015] In some embodiments, the detection mechanism further comprises:

[0016] A temperature detection component is installed on the transmission mechanism and / or the drive mechanism to detect the temperature of the transmission mechanism and / or the drive mechanism.

[0017] In some embodiments, the driving mechanism comprises:

[0018] a motor seat, spaced apart from the transmission mechanism; and

[0019] The motor is installed on the motor seat; the motor is drivingly connected to the transmission mechanism to drive the transmission mechanism to rotate.

[0020] In some embodiments, the transmission mechanism comprises:

[0021] A bearing seat is installed on the base; the bearing seat is located between the flywheel and the motor seat;

[0022] A bearing mounted on the bearing seat; and

[0023] A transmission shaft is supported by the bearing; one end of the transmission shaft is drivingly connected to the motor, and the other end of the transmission shaft is drivingly connected to the flywheel.

[0024] In some embodiments, there are multiple temperature detection components, at least one temperature detection component is installed on the housing of the motor seat, and at least one temperature detection component is installed on the bearing seat.

[0025] In some embodiments, the detection mechanism further comprises:

[0026] A distance detection element is installed near the flywheel and is constructed to detect the radial offset of the flywheel in a stationary state; the control component is electrically connected to the distance detection element, and the control component is also constructed to calculate whether the position of the flywheel in a stationary state meets the requirements based on the radial offset of the flywheel in a stationary state detected by the distance detection element.

[0027] An embodiment of the present invention further provides a flying spot imaging device, including the flying spot scanning device provided by any technical solution of the present invention.

[0028] The embodiment of the present invention further provides a method for adjusting the dynamic balance of a flying spot scanning device, comprising the following steps:

[0029] Starting the flying spot scanning device provided by any technical solution of the present invention at a set rotation speed, and measuring a first amplitude of a flywheel of the flying spot scanning device;

[0030] Determining whether the first amplitude is greater than or equal to a preset second amplitude;

[0031] If the first amplitude is greater than or equal to the preset second amplitude, the flywheel is dynamically balanced until the measured third amplitude of the adjusted flywheel is less than the preset second amplitude.

[0032] In some embodiments, the method for dynamic balance adjustment of a flying spot scanning device adopts the following steps to perform dynamic balance adjustment on the flywheel:

[0033] Adding a counterweight at a set position on the edge of the flywheel;

[0034] Starting the flywheel with the counterweight at the set rotation speed, and measuring a fourth amplitude of the flywheel;

[0035] Calculating a compensation amount of the flywheel weight that needs to be changed according to the first amplitude, the fourth amplitude, and the weight of the counterweight;

[0036] stopping the flywheel with the counterweight;

[0037] The weight of the counterweight is reduced according to the compensation amount in the same direction as the vector direction of the set position, or the weight of the counterweight is increased according to the compensation amount in the opposite direction to the vector direction corresponding to the set position.

[0038] In some embodiments, the flying spot scanning device dynamic balance adjustment method further includes the following steps:

[0039] measuring again the fifth amplitude of the flywheel after adjusting the weight;

[0040] Determining whether the fifth amplitude is greater than or equal to the preset second amplitude;

[0041] If the fifth amplitude is greater than or equal to the preset second amplitude, repeat the above-mentioned dynamic balancing adjustment steps until the measured fifth amplitude of the flywheel is less than the preset second amplitude, and use the fifth amplitude at this time as the third amplitude of the flywheel after adjustment.

[0042] In some embodiments, the flying spot scanning device dynamic balance adjustment method uses the following formula to calculate the compensation amount:

[0043] G2 = A*G1 / (BA);

[0044] Among them, G2 is the compensation amount, G1 is the weight of the counterweight, A is the first amplitude, and B is the second amplitude.

[0045] The embodiment of the present invention further provides a flying spot scanning device dynamic balance adjustment system, comprising:

[0046] Memory; and

[0047] A processor coupled to the memory, the processor being configured to execute the flying spot scanning device dynamic balance adjustment method provided by any technical solution of the present invention based on instructions stored in the memory.

[0048] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method for adjusting the dynamic balance of a flying spot scanning device provided by any technical solution of the present invention is implemented.

[0049] The flying spot scanning device provided by the above technical solution uses the vibration detection component of the detection mechanism to obtain the amplitude of the flywheel, and then determine whether the amplitude of the flywheel meets the requirements. If the vibration of the flywheel is too large, then the image obtained by the subsequent flying spot scanning device will be greatly different from the actual object to be detected. At this time, it is not appropriate to directly use the flying spot scanning device to collect the image of the object to be detected, but it is necessary to adjust the dynamic balance of the flywheel. After the dynamic balance of the flywheel is adjusted to meet the requirements, the flying spot scanning device is used to collect the image of the object to be detected. At this time, the image obtained has a higher accuracy. The flying spot scanning device provided by the above technical solution monitors the status of the transmission mechanism and the flywheel and performs real-time correction based on the collected status data to ensure that the image collected by the flying spot scanning device is of high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0051] Figure 1 A schematic structural diagram of a flying spot scanning device provided in an embodiment of the present invention.

[0052] Figure 2 A schematic diagram of a dynamic balance adjustment method for a flying spot scanning device provided in an embodiment of the present invention.

[0053] Figure 3 A schematic diagram of a flying spot scanning device dynamic balance adjustment method according to an embodiment of the present invention for dynamic balance adjustment.

[0054] Figure 4 A vector direction schematic diagram of a dynamic balance adjustment method for a flying spot scanning device provided in an embodiment of the present invention.

[0055] Figure 5 A schematic diagram of flywheel vibration in a method for dynamic balancing a flying spot scanning device provided in an embodiment of the present invention.

[0056] Reference numerals:

[0057] 1. Base; 2. Driving mechanism; 3. Transmission mechanism; 4. Flywheel; 5. Detection mechanism;

[0058] 21. Motor seat; 22. Motor;

[0059] 31. Bearing seat; 32. Bearing; 33. Transmission shaft; 34. Coupling;

[0060] 51. Vibration detection component; 52. Distance detection element; 53. Temperature detection component. DETAILED DESCRIPTION

[0061] Combine the following Figure 1 to Figure 5 The technical solution provided by the present invention is described in more detail. The description of the exemplary embodiments is merely illustrative and is by no means intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as being merely exemplary and not limiting.

[0062] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of also including other elements.

[0063] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0064] All terms used in the present disclosure, including technical terms or scientific terms, have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0065] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment are considered part of the specification.

[0066] The dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. In the drawings, the same reference numerals are attached to common structural elements or structural elements of the same type, and their repeated descriptions are appropriately omitted.

[0067] The inventors have found through research that due to the movement characteristics of the flying spot scanning device itself, vibration is inevitable during operation. When the vibration exceeds a certain level, it will seriously affect the imaging quality. Therefore, it is necessary to grasp the vibration of the flying spot scanning device in real time to avoid the occurrence of low imaging quality caused by vibration.

[0068] Figure 1 A schematic structural diagram of a flying spot scanning device provided in an embodiment of the present invention. Figure 2 A schematic diagram of a dynamic balance adjustment method for a flying spot scanning device provided in an embodiment of the present invention. Figure 3 A schematic diagram of a flying spot scanning device dynamic balance adjustment method according to an embodiment of the present invention for dynamic balance adjustment. Figure 4 A vector direction schematic diagram of a dynamic balance adjustment method for a flying spot scanning device provided in an embodiment of the present invention. Figure 5 A schematic diagram of flywheel vibration in a method for dynamic balancing a flying spot scanning device provided in an embodiment of the present invention.

[0069] See also Figures 1 to 5, an embodiment of the present invention provides a flying spot scanning device for X-ray backscattering technology. The flying spot scanning device includes a base 1, a driving mechanism 2, a transmission mechanism 3, a flywheel 4, a detection mechanism 5 and a control component (not shown). The base 1 is configured to provide support. The driving mechanism 2 is mounted on the base 1, and the driving mechanism 2 is supported by the base 1. The transmission mechanism 3 is mounted on the base 1, and the transmission mechanism 3 is supported by the base 1; the transmission mechanism 3 is drivingly connected to the driving mechanism 2 to rotate under the drive of the driving mechanism 2. The flywheel 4 is drivingly connected to the transmission mechanism 3 to rotate with the rotation of the transmission mechanism 3. The detection mechanism 5 includes a vibration detection component 51; the vibration detection component 51 is mounted on the transmission mechanism 3 to detect the amplitude of the transmission mechanism 3. The control component is electrically connected to the detection mechanism 5, and the control component is configured to determine whether the vibration of the flywheel 4 during the movement meets the requirements according to the amplitude detected by the vibration detection component 51. If the first amplitude of the flywheel 4 during the rotation process is greater than or equal to the preset second amplitude, the vibration of the flywheel 4 during the movement process does not meet the requirements; if the first amplitude is less than the preset second amplitude, the vibration of the flywheel 4 during the movement process meets the requirements. The second amplitude is a value preset in advance according to the actual application scenario of the flying spot scanning device.

[0070] The operation process of the flying spot scanning device is as follows: when the driving mechanism 2 of the flying spot scanning device is started, the driving mechanism 2 starts according to the preset mode. The rotation of the driving mechanism 2 is transmitted to the flywheel 4 through the transmission mechanism 3 to realize the kinetic energy transmission. The flywheel 4 rotates at a high speed under the drive of the driving mechanism 2. The high-speed rotating flywheel 4 enables the X-ray beam to scan the target at a higher frequency. The flying spot scanning device can identify the internal structure, surface defects and internal objects of the object to be inspected through rapid scanning and imaging.

[0071] The base 1 supports the structural stability and functional realization of the entire flying spot scanning device. The base 1 not only affects the performance of the flying spot scanning device, but is also directly related to the user experience and work efficiency of the flying spot imaging device. The base 1 can be made of a single material or a combination of multiple materials to meet different performance requirements. Common materials for the base 1 include aluminum alloy, steel, plastic or composite materials, and shock-absorbing materials. Aluminum alloy has the characteristics of light weight, high strength and good corrosion resistance. In addition, aluminum alloy has good thermal conductivity, which helps the flying spot scanning device to dissipate heat. In applications that require higher rigidity, the base 1 can be made of steel. The firmness and stability of steel can effectively reduce the vibration of the flying spot scanning device during operation, thereby improving the imaging quality. In some portable or lightweight applications, the base 1 can use high-performance plastics or composite materials to facilitate the handling and installation of the flying spot scanning device. High-performance plastics or composite materials can provide sufficient rigidity while reducing the total weight of the device. Shock-absorbing materials can effectively reduce or absorb external impacts, etc., to ensure the stability of imaging.

[0072] In some embodiments, Figure 1 As shown, the base 1 has a large bottom size and a small top size, and the base 1 has good structural stability. During the operation of the flying spot scanning device, even if there is a certain degree of vibration, the stability of the flying spot scanning device can be maintained, so that the stability of the flying spot scanning device during use is guaranteed, and the degradation of imaging quality due to shaking, etc. is reduced or even avoided. The driving mechanism 2 and the transmission mechanism 3 are both installed on the top of the base 1 and are supported by the base 1.

[0073] The driving mechanism 2 provides power for the rotation of the flywheel 4. Figure 1 As shown, the drive mechanism 2 is installed at the top right edge of the base 1. The load of the drive mechanism 2 and the transmission mechanism 3 on the base 1 is basically uniform. In some embodiments, the drive mechanism 2 includes a motor seat 21 and a motor 22. The motor seat 21 and the transmission mechanism 3 are arranged at intervals. The motor 22 is installed on the motor seat 21; the motor 22 is connected to the transmission mechanism 3 to drive the transmission mechanism 3 to rotate. The motor 22 provides power for the rotation of the flywheel 4.

[0074] The driving mechanism 2 provides sufficient torque and rotation speed for the flywheel 4 of the flying spot scanning device to ensure that the flywheel 4 can start quickly and rotate stably.

[0075] The transmission mechanism 3 is arranged between the driving mechanism 2 and the flywheel 4, and the transmission mechanism 3 transmits the power generated by the driving mechanism 2 to the flywheel 4. The transmission mechanism 3 can use a transmission shaft, gears, belts, chains and other structures to achieve power transmission.

[0076] See also Figure 1 In some embodiments, the transmission mechanism 3 includes a bearing seat 31, a bearing 32 and a transmission shaft 33. The bearing seat 31 is installed on the base 1; the bearing seat 31 is located between the flywheel 4 and the motor seat 21. The bearing 32 is installed on the bearing seat 31. The transmission shaft 33 is supported by the bearing 32; one end of the transmission shaft 33 is connected to the motor 22 for driving, and the other end of the transmission shaft 33 is connected to the flywheel 4. The transmission mechanism 3 may also include a gearbox, a clutch, etc., for achieving smooth power transmission and speed regulation. Gear transmission has high efficiency and is suitable for high torque occasions. In addition, the gear transmission can withstand the dynamic load of the flywheel 4 during operation, enhance the reliability of the transmission system, and will not affect the imaging results due to deformation during movement. The rotation of the motor 22 will drive the transmission shaft 33 to rotate synchronously, and the transmission shaft 33 will drive the flywheel 4 to rotate. A coupling 34 is provided between the output shaft of the motor 22 and the transmission shaft 33 to achieve the connection between the two shafts.

[0077] In order to enable the transmission mechanism 3 to adapt to different working conditions and to operate stably when the temperature, humidity, dust and the like in the environment change, the transmission mechanism 3 may be designed to be sealed, or a protective cover may be provided on the outside of the transmission shaft 33 .

[0078] The flywheel 4 utilizes rotational motion to achieve rapid scanning of an X-ray beam (e.g., a pencil beam) to achieve high-quality imaging effects. The flywheel 4 includes a wheel body and a rotating shaft. The wheel body has a larger diameter and an appropriate thickness to increase the moment of inertia of the flywheel 4, thereby storing more kinetic energy. The shape of the wheel body can be solid or hollow. The flywheel 4 is driven and connected to the transmission mechanism 3 through a rotating shaft to rotate under the drive of the driving mechanism 2. The rotating shaft is used to support the wheel body and allow it to rotate freely, while transmitting the power provided by the transmission mechanism 3 to the wheel body.

[0079] During the startup process, the flywheel 4 is gradually accelerated by the transmission mechanism 3 under the power provided by the motor 22. Through rotation, the flywheel 4 stores a certain amount of kinetic energy, and the magnitude of the kinetic energy depends on the rotational inertia and rotation speed of the flywheel 4. During the entire beam scanning process, the inertial force formed by the rotation of the flywheel 4 can offset external interference to a certain extent and resist speed changes. This feature is particularly important in rapid imaging or dynamic scanning, and can effectively improve the stability and consistency of imaging. The high-speed rotation of the flywheel 4 allows the X-ray beam to scan the object being detected at a very high frequency, thereby increasing the speed of imaging. During the scanning process, the flywheel 4 usually rotates at a constant speed to ensure that the X-ray beam covers the target area evenly and quickly.

[0080] The material of the flywheel 4 is one or more of the following: aluminum alloy, carbon fiber composite material and steel. The stable rotation of the flywheel 4 enables the X-ray beam to remain constant during scanning without being affected by the outside world. The inertial characteristics of the flywheel 4 can effectively balance the interference, etc., of the flying spot scanning device during operation, ensuring the stability of the scanning process and the subsequent imaging quality. The flywheel 4 enables the flying spot scanning device to better adapt to different application scenarios and maintain stable operating performance in various operating modes.

[0081] In a flying spot scanning device, the smooth rotation of the flywheel 4 is the key to obtaining high-quality imaging. However, during high-speed operation, the flywheel 4 may generate corresponding vibrations due to imbalance, material defects or external interference. The vibration will not only affect the imaging quality, but may also cause damage to the flying spot scanning device. Therefore, timely monitoring and evaluation of the vibration condition is crucial for the scanning of the flying spot imaging device and the imaging quality based thereon. To this end, the flying spot scanning device provided in an embodiment of the present invention has a detection mechanism 5, and the detection mechanism 5 includes a vibration detection component 51. The vibration detection component 51 is, for example, a vibration sensor. Figure 1As shown, the vibration detection component 51 is installed on the transmission mechanism 3, and the vibration detection component 51 is used to detect the amplitude of the transmission mechanism 3. The vibration detection component 51 is specifically installed on the transmission mechanism 3 to monitor the amplitude of the transmission mechanism 3 in real time. In the embodiment of this article, since the flywheel 4 is directly connected to the transmission mechanism 3, specifically the transmission shaft 33 of the transmission mechanism 3, the amplitude of the transmission mechanism 3 is regarded as the amplitude of the flywheel 4. Therefore, the amplitude of the transmission mechanism 3 obtained by the vibration detection component 51 in real time is equivalent to obtaining the amplitude of the flywheel 4 in the rotation process in real time.

[0082] The control component receives the amplitude detected by the vibration detection component 51, and analyzes and processes the received amplitude, and then determines whether the amplitude of the flywheel 4 is within the limited range. During operation, the flywheel 4 is always rotating. If the amplitude of the flywheel 4 at any phase exceeds the preset second amplitude, it means that the flywheel 4 needs to be dynamically balanced. The specific method of dynamic balance adjustment is described below.

[0083] The above technical solution sets a vibration detection component 51, and through real-time detection of the amplitude of the transmission mechanism 3, it is determined whether the first amplitude of the flywheel 4 during the rotation process is greater than or equal to the preset second amplitude. If the first amplitude is greater than or equal to the preset second amplitude, the vibration of the flywheel 4 during the movement does not meet the requirements, and dynamic balance adjustment is required; if the first amplitude is less than the preset second amplitude, the vibration of the flywheel 4 during the movement meets the requirements, and dynamic balance adjustment is not required. This can provide a basis for judgment and adjustment for subsequent vibration reduction, significantly improving the imaging quality of the flying spot scanning device; at the same time, it can also detect abnormalities early, thereby preventing equipment damage caused by excessive vibration, reducing the frequency of unexpected equipment shutdowns, and improving the stability of the overall equipment; in addition, through real-time detection and analysis of vibration conditions, potential faults can be handled in a timely manner to ensure long-term stable operation of the equipment and extend its service life.

[0084] Continue to see Figure 1 , the detection mechanism 5 may also include a distance detection element 52. The distance detection element 52 may be selected from one of the following: a laser rangefinder, an ultrasonic rangefinder, and a photoelectric rangefinder, etc. The distance detection element 52 is installed near the flywheel 4, and the distance detection element 52 is configured to detect the radial offset of the flywheel 4 in a stationary state. The control component is electrically connected to the distance detection element 52, and the control component is also configured to calculate whether the position of the flywheel 4 in a stationary state meets the requirements based on the radial offset of the flywheel 4 in a stationary state detected by the distance detection element 52. If the position of the flywheel 4 in a stationary state deviates too much from the preset position (for example, the position required for installation), the state of the flywheel 4 during operation may vibrate too much. The distance detection element 52 can be used to identify whether the installation position of the flywheel 4 or the position after stopping after running for a period of time meets the installation requirements.

[0085] The vibration detection component 51 and the distance detection element 52 can be used in conjunction with each other: the vibration detection component 51 is used to measure the real-time amplitude of the flywheel 4 during rotation, and the distance detection element 52 is used to measure the radial offset of the flywheel 4 in a static state. The vibration detection component 51 and the distance detection element 52 are both electrically connected to the control component. The control component determines the vibration conditions of the flywheel 4 in a static state and during operation according to the detection signals of the distance detection element 52 and the vibration detection component 51.

[0086] Continue to see Figure 1 In some embodiments, the detection mechanism 5 may further include a temperature detection component 53 , which is installed on the transmission mechanism 3 and / or the drive mechanism 2 to detect the temperature of the transmission mechanism 3 and / or the drive mechanism 2 .

[0087] Continue to see Figure 1 In some embodiments, there are multiple temperature detection components 53, at least one temperature detection component 53 is installed on the outer shell of the motor base 21, and can directly detect the temperature of the outer shell of the motor base 21. At least one temperature detection component 53 is installed on the bearing seat 31, and can directly detect the temperature of the bearing seat 31.

[0088] If the temperature value detected by any temperature detection component 53 exceeds the required temperature value, it means that the temperature of the flying spot scanning device is too high. When the temperature is too high, the flying spot scanning device can send a first alarm signal or shut down. The first alarm signal can be a sound signal, a light signal, etc.

[0089] In addition, an embodiment of the present invention further provides a flying spot imaging device, which includes the above-mentioned flying spot scanning device and a detector arranged between the flying spot scanning device and the object to be detected, and the detector is used to receive X-rays reflected by the object to be detected.

[0090] See also Figure 2 The embodiment of the present invention further provides a method for adjusting the dynamic balance of a flying spot scanning device, comprising the following steps:

[0091] Step S100, start the flying spot scanning device at a set speed to measure the first amplitude A of the flywheel 4. The control component can obtain the first amplitude of the flywheel 4 according to the detection parameters of the vibration detection component 51. The vibration detection component 51 can directly detect the amplitude of the flywheel 4. The amplitude of the flywheel 4 before dynamic balancing adjustment is the first amplitude.

[0092] Step S200, determining whether the first amplitude is greater than or equal to a preset second amplitude. The preset second amplitude is a parameter set in advance, and different values ​​are set according to different models and application scenarios of the flying spot scanning device.

[0093] Step S300: If the first amplitude is greater than or equal to the preset second amplitude, the flywheel 4 is dynamically balanced until the third amplitude of the flywheel 4 after adjustment is less than the preset second amplitude. If the first amplitude is greater than or equal to the preset second amplitude, it means that the vibration of the flywheel 4 is too large, and the image scanned by the flying spot scanning device may have a large deviation from the actual image, so the flywheel 4 needs to be dynamically balanced.

[0094] If the first amplitude is smaller than the preset second amplitude, it means that the vibration of the flywheel 4 is small, and in this case, there is no need to perform dynamic balancing adjustment on the flywheel 4 .

[0095] See also Figure 3 and Figure 4 In some embodiments, the following steps are used to dynamically balance the flywheel 4. Dynamic balancing herein means reducing or eliminating vibration by adjusting the mass distribution of the flywheel 4 so that the flywheel 4 remains stable during movement.

[0096] Step S301, add a counterweight at a set position on the edge of the flywheel 4. The weight of the counterweight is G1. The set position can be any position on the edge of the flywheel 4, for example, it can be the edge of the flywheel 4, and the counterweight is fixedly connected to the flywheel 4. After adding the counterweight, the counterweight and the flywheel 4 rotate synchronously. The weight distribution of the rotatable part of the flying spot scanning device changes, and the rotation characteristics of the flywheel 4 of the flying spot scanning device will also change accordingly. After the rotation characteristics of the flywheel 4 change, the amplitude of the flywheel 4 may increase, or the amplitude of the flywheel 4 may decrease, which does not affect the adjustment of step S302.

[0097] Step S302, start the flywheel 4 with the counterweight at a set speed, and measure the fourth amplitude B of the flywheel 4. The set speed is a parameter set in advance, and is set according to the actual scenario of the flying spot scanning device.

[0098] Step S303, according to the first amplitude A, the fourth amplitude B, and the weight G1 of the counterweight, calculate the compensation amount G2 of the weight of the flywheel 4. Specifically, the compensation amount is calculated according to the following formula: G2 = A*G1 / (BA).

[0099] Step S304, stop the flywheel 4 with the counterweight.

[0100] Step S305: Reduce the weight of the counterweight according to the compensation amount in the same direction as the vector direction of the set position, and the reduced weight is G2. Alternatively, increase the weight of the counterweight according to the compensation amount in the opposite direction of the vector direction corresponding to the set position, and the increased weight is G2. Figure 4 to be sure. Figure 4 The center vector A corresponds to the position of the center of gravity of the counterweight. The vector B corresponds to the intersection of the counterweight and the flywheel 4.

[0101] Continue to see Figure 3 After the dynamic balance adjustment is performed, in some embodiments, the method for dynamic balance adjustment of the flying spot scanning device further comprises the following steps:

[0102] Step S306, measuring the fifth amplitude of the flywheel 4 after the weight is adjusted again.

[0103] Step S307, determining whether the fifth amplitude is greater than or equal to a preset second amplitude.

[0104] Step S308, if the fifth amplitude is greater than or equal to the preset second amplitude, repeat the above dynamic balancing adjustment steps until the measured fifth amplitude of the flywheel 4 is less than the preset second amplitude, and the fifth amplitude at this time is used as the third amplitude of the flywheel 4 after adjustment.

[0105] The above steps S306 to S308 are to cyclically detect the vibration of the flywheel 4 until the fifth amplitude of the flywheel 4 is less than the preset second amplitude, and the fifth amplitude is used as the adjusted third amplitude of the flywheel 4, thus obtaining the third amplitude in step S300. Then, the flying spot scanning device after dynamic balance adjustment is used to detect and image the object to be detected.

[0106] After the flying spot scanning device completes the dynamic balance adjustment, the dynamic imbalance of the flywheel 4 will not be completely 0 and cannot be eliminated, that is, during the operation, the flying spot scanning device will always have dynamic imbalance and centrifugal force, affecting the stable operation of the flywheel 4. However, this amount has little effect on the accuracy of imaging, and the imaging quality can be improved by correcting the image.

[0107] In some embodiments, the flying spot scanning device dynamic balance adjustment method further includes the following steps to detect the service life of the bearing 32 and issue a second alarm signal when the service life of the bearing 32 exceeds the designed service life.

[0108] First, the running time of the bearing 32 of the transmission mechanism 3 is detected. Specifically, a sensor can be used to detect the running time of the bearing 32.

[0109] Secondly, when the running time of the bearing 32 exceeds the service life of the bearing 32, the flying spot scanning device sends out a second alarm signal. The second alarm signal can be a sound signal, a light signal, etc.

[0110] If rolling bearings are used, the life of the rolling bearings shall be determined according to ISO281. The bearing life L 10 The formula is:

[0111] Among them, L 10is the basic rated life of the bearing (taking 90% reliability as an example), in millions of revolutions. C is the basic rated dynamic load, in kN. P is the equivalent dynamic load of the bearing, in kN. The bearing can be a ball bearing or a roller bearing. The value of P is determined according to the bearing type and industry standards. If it is a ball bearing, P is 3; if it is a roller bearing, P is 10 / 3.

[0112] The rated dynamic load C of the bearing 32 is a parameter of the bearing 32, which has been determined at the factory. The equivalent dynamic load P of the bearing is calculated based on the load and support method. When the structure, load and bearing model of the flywheel 4 are determined, the speed life and time life of the bearing 32 can be calculated.

[0113] The accumulated number of rotations L of the bearing 32 can be calculated by the speed sensor and the controller. When L>0.9×L 10 When the bearing 32 fails, the controller will alarm to remind the operator to replace the bearing 32 in time to avoid failure or accident caused by the failure of the bearing 32.

[0114] In some embodiments, the flying spot scanning device dynamic balance adjustment method can also realize lubricant life warning. The life tb of the bearing lubricant is provided by the manufacturer, and the running time t of the bearing 32 is recorded by the control component or the speed sensor. When t>0.9×tb, the flying spot scanning device sends a second alarm signal to prompt the operator to replace the lubricant in time to avoid bearing 32 and equipment failure due to lubricant failure.

[0115] The method for dynamic balance adjustment of the flying spot scanning device provided by the above technical solution can perform dynamic balance adjustment on the flywheel 4 before the flying spot scanning device forms an image, thereby improving the reliability and stability of the flying spot scanning device.

[0116] An embodiment of the present invention provides a flying spot scanning device adjustment system, including a memory and a processor coupled to the memory, wherein the processor is configured to execute the flying spot scanning device dynamic balance adjustment method in any one of the aforementioned embodiments based on instructions stored in the memory.

[0117] The memory may include, for example, a system memory, a fixed non-volatile storage medium, etc. The system memory may store, for example, an operating system, an application program, a boot loader, and other programs.

[0118] Some embodiments of the present disclosure further provide a computer-readable storage medium on which a computer program is stored, wherein when the program is executed by a processor, the method for adjusting the dynamic balance of a flying spot scanning device in any of the above embodiments is implemented.

[0119] The processor described herein may include a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0120] Storage media can be any available media that can be accessed by a computer. As an example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer. Any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of the medium. As used herein, disks and discs include compact discs (CDs), laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and blue-ray discs, wherein disks often reproduce data magnetically, and discs reproduce data optically with lasers. The above combination should also be included in the scope of computer-readable media.

[0121] Those skilled in the art will appreciate that the method embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable non-transient storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0122] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0123] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0124] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0125] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the protection content of the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0126] In the description of the present invention, each technical feature may be combined with other technical features where feasible.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flying spot scanning device, characterized in that: include: A base (1) configured to provide support; A driving mechanism (2) is mounted on the base (1) and supported by the base (1); A transmission mechanism (3) is mounted on the base (1) and supported by the base (1); the transmission mechanism (3) is drivingly connected to the drive mechanism (2) so as to rotate under the drive of the drive mechanism (2); A flywheel (4) is drivingly connected to the transmission mechanism (3) so as to rotate along with the rotation of the transmission mechanism (3); A detection mechanism (5) comprising a vibration detection component (51); the vibration detection component (51) is installed on the transmission mechanism (3) to detect the amplitude of the transmission mechanism (3); as well as A control component is electrically connected to the detection mechanism (5), and is configured to calculate whether the vibration of the flywheel (4) during movement meets the requirements based on the amplitude detected by the vibration detection component (51).

2. The flying spot scanning device according to claim 1, characterized in that: The detection mechanism (5) further comprises: A temperature detection component (53) is installed on the transmission mechanism (3) and / or the drive mechanism (2) to detect the temperature of the transmission mechanism (3) and / or the drive mechanism (2).

3. The flying spot scanning device according to claim 2, characterized in that: The driving mechanism (2) comprises: a motor base (21) arranged at a distance from the transmission mechanism (3); and The motor (22) is mounted on the motor seat (21); the motor (22) is drivingly connected to the transmission mechanism (3) to drive the transmission mechanism (3) to rotate.

4. The flying spot scanning device according to claim 3, characterized in that: The transmission mechanism (3) comprises: A bearing seat (31) is mounted on the base (1); the bearing seat (31) is located between the flywheel (4) and the motor seat (21); A bearing (32) mounted on the bearing seat (31); and A transmission shaft (33) is supported by the bearing (32); one end of the transmission shaft (33) is drivingly connected to the motor (22), and the other end of the transmission shaft (33) is drivingly connected to the flywheel (4).

5. The flying spot scanning device according to claim 4, characterized in that: There are multiple temperature detection components (53), at least one temperature detection component (53) is installed on the outer shell of the motor seat (21), and at least one temperature detection component (53) is installed on the bearing seat (31).

6. The flying spot scanning device according to claim 1, characterized in that: The detection mechanism (5) further comprises: A distance detection element (52) is installed near the flywheel (4) and is configured to detect a radial offset of the flywheel (4) in a stationary state; the control component is electrically connected to the distance detection element (52), and the control component is further configured to calculate whether the position of the flywheel (4) in a stationary state meets requirements based on the radial offset of the flywheel (4) in a stationary state detected by the distance detection element (52).

7. A flying spot imaging device, characterized in that: The invention comprises a flying spot scanning device as described in any one of claims 1 to 6.

8. A method for adjusting the dynamic balance of a flying spot scanning device, characterized in that: The following steps are involved: Starting the flying spot scanning device according to any one of claims 1 to 6 at a set rotation speed, and measuring a first amplitude of a flywheel (4) of the flying spot scanning device; Determining whether the first amplitude is greater than or equal to a preset second amplitude; If the first amplitude is greater than or equal to the preset second amplitude, the flywheel (4) is dynamically balanced until the measured third amplitude of the flywheel (4) after adjustment is less than the preset second amplitude.

9. The method for dynamic balance adjustment of a flying spot scanning device according to claim 8, characterized in that: The flywheel (4) is dynamically balanced by the following steps: adding a counterweight at a set position on the edge of the flywheel (4); Starting the flywheel (4) with the counterweight at the set rotation speed, and measuring a fourth amplitude of the flywheel (4); Calculating a compensation amount of the flywheel (4) that needs to be changed in weight according to the first amplitude, the fourth amplitude, and the weight of the counterweight; stopping the flywheel (4) with the counterweight; The weight of the counterweight is reduced according to the compensation amount in the same direction as the vector direction of the set position, or the weight of the counterweight is increased according to the compensation amount in the opposite direction to the vector direction corresponding to the set position.

10. The method for dynamic balance adjustment of a flying spot scanning device according to claim 9, characterized in that: The following steps are also included: measuring again the fifth amplitude of the flywheel (4) after adjusting the weight; Determining whether the fifth amplitude is greater than or equal to the preset second amplitude; If the fifth amplitude is greater than or equal to the preset second amplitude, the above-mentioned dynamic balancing adjustment steps are repeated until the measured fifth amplitude of the flywheel (4) is less than the preset second amplitude, and the fifth amplitude at this time is used as the third amplitude of the flywheel (4) after adjustment.

11. The method for dynamic balance adjustment of a flying spot scanning device according to claim 9, characterized in that: The compensation amount is calculated using the following formula: G2 = A*G1 / (BA); Among them, G2 is the compensation amount, G1 is the weight of the counterweight, A is the first amplitude, and B is the second amplitude.

12. A flying spot scanning device dynamic balance adjustment system, characterized in that: include: Memory; and A processor coupled to the memory, wherein the processor is configured to execute the method for adjusting the dynamic balance of a flying spot scanning device according to any one of claims 8 to 11 based on instructions stored in the memory.

13. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the method for adjusting the dynamic balance of a flying spot scanning device as claimed in any one of claims 8 to 11 is implemented.

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