A CT collision protection device and CT collision protection method thereof

Abstract

The present invention discloses a CT collision protection device and a CT collision protection method thereof. The CT collision protection device comprises: a collision distance sensor vertically arranged on the end surface of a CT scanning bed body close to a CT rack cover, which outputs a warning message when detecting that the CT rack cover enters into a safe distance of a bed board of the CT scanning bed; an infrared sensing sensor arranged on the upper end of the CT rack cover, which outputs a warning message after detecting that a patient under examination leaves a safe area; a misoperation processing unit, which outputs a collision signal when one of the bed board of the CT scanning bed and the CT rack cover moves; and a control feedback unit connected to a CT motion module, wherein the collision distance sensor, the infrared sensing sensor and the misoperation processing unit are all connected to the control feedback unit, so as to control the CT motion module to stop moving when receiving the warning message and the collision signal at the same time, thereby effectively preventing the CT scanning bed from colliding with the CT rack cover.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically, to a CT collision protection device. In addition, the present invention also relates to a CT collision protection method applied to the above CT collision protection device. Background Art

[0002] CT is widely used in the field of clinical medicine. During the scanning process, the CT scanning bed can move forward and backward longitudinally and vertically up and down, and the CT frame cover can tilt forward and backward. Since the movement relationship between the two is relatively complex, it poses a great challenge to the collision protection of CT.

[0003] The collision protection in the prior art is mostly to prevent the patient from being squeezed, such as setting up an infrared sensor to detect whether the patient is squeezed; or using resistive materials and capacitive materials to make the CT scanner bed fixed cover and the CT gantry cover. When the fixed cover collides with the CT gantry cover, its own resistance / capacitance value changes to control the CT to stop moving. The former cannot solve the problem of the CT gantry cover colliding with the lower end of the CT scanner bed when tilted, and the infrared sensor may interfere with the doctor's positioning; while the latter can solve the problem of the CT gantry cover colliding with the lower end of the CT scanner bed when tilted, but the production cost of the resistive / capacitive CT scanner bed fixed cover and the CT gantry cover is extremely high, easily millions.

[0004] In addition, there is also a collision protection method that uses software algorithms to detect the distance between the CT scanning bed and the CT gantry cover, but this method introduces software calculation risks and there is still a risk of collision.

[0005] In summary, how to simply and efficiently prevent the CT scanning bed from colliding with the CT gantry cover is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a CT collision protection device, which can effectively prevent the CT scanning bed from colliding with the CT gantry cover, and has a simple structure and low cost.

[0007] In addition, the present invention also provides a CT collision protection method applied to the above-mentioned CT collision protection device.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A CT collision protection device, comprising:

[0010] A collision distance sensor is vertically arranged on the end surface of the CT scanning bed body close to the CT gantry cover, and outputs a warning message when detecting that the CT gantry cover enters the safe distance of the CT scanning bed board;

[0011] An infrared sensor disposed at the upper end of the CT gantry cover outputs the warning information after detecting that the patient under examination leaves the safe area;

[0012] a misoperation processing unit, configured to output a collision signal when one of the CT scanning bed board and the CT gantry cover moves;

[0013] A control feedback unit connected to the CT motion module, wherein the collision distance sensor, the infrared sensing sensor and the malfunction processing unit are all connected to the control feedback unit so as to control the CT motion module to stop moving when the warning information and the collision signal are received at the same time.

[0014] Preferably, the axis of the collision distance sensor coincides with the axis of the CT scanning bed in the length direction.

[0015] Preferably, the collision distance sensor includes an ultrasonic distance sensor, an infrared distance sensor or a photoelectric sensor.

[0016] Preferably, it further comprises a false action proximity sensor connected to the false action processing unit, wherein the false action proximity sensor is installed on the CT scanning bed, and the detection direction of the false action proximity sensor is not parallel to the detection direction of the collision distance sensor;

[0017] The malfunction processing unit outputs a collision signal when the malfunction proximity sensor detects no obstacle in its detection direction.

[0018] Preferably, the detection direction of the malfunction proximity sensor is perpendicular to the detection direction of the collision distance sensor.

[0019] Preferably, the malfunction proximity sensor comprises a diffuse reflection photoelectric switch, a capacitive proximity sensor or a magnetic proximity sensor.

[0020] Preferably, it further comprises a distance sensor connected to the control feedback unit, wherein the distance sensor is arranged on the end surface of the CT scanning bed body away from the CT gantry cover to detect whether the CT scanning bed board exits the CT gantry cover aperture of the CT gantry cover;

[0021] When the distance sensor detects that the CT scanning bed board exits the aperture of the CT gantry cover, the control feedback unit controls the CT scanning bed body to freely rise and fall through the CT motion module.

[0022] A CT collision protection method, comprising:

[0023] Detect whether the CT gantry cover appears within the safe distance of the CT scanning bed board, and detect whether the patient is in the safe area;

[0024] Determine whether there is relative movement between the CT scanning bed board and the CT gantry cover and / or determine whether there is a possibility of malfunction to avoid malfunction;

[0025] When the malfunction does not occur and the CT gantry cover enters the safe distance of the CT scanning bed board and / or the patient enters outside the safe area, the CT is controlled to stop moving.

[0026] In the CT collision protection device provided by the present invention, during the movement of the CT, the collision distance sensor detects whether the CT gantry cover enters the safe distance of the CT scanning bed board to prevent the lower end of the CT gantry cover from colliding with the CT scanning bed board; the infrared sensing sensor detects whether the patient under examination is in the safe area to prevent the upper end of the CT gantry cover from being too close to the CT scanning bed board and squeezing the patient under examination. When the CT gantry cover enters the safe distance of the CT scanning bed board, the collision distance sensor outputs a warning message; when the patient under examination leaves the safe area, the infrared sensing sensor outputs a warning message.

[0027] At the same time, the misoperation processing unit determines whether there is a possibility of collision between the CT scanning bed board and the CT gantry cover. When either of them is in motion, it is determined that there is a possibility of collision and a collision signal is output; on the contrary, when both are in a static state, it is determined that there is no possibility of collision, which is a misoperation interference such as doctor positioning. When the control feedback unit receives the warning information and the collision signal at the same time, it controls the CT motion module to stop moving.

[0028] It should be noted that the safety distance is the distance between the collision distance sensor and the bed board of the CT scanning bed.

[0029] The CT collision protection device provided by the present invention utilizes a collision distance sensor to detect whether there is an obstacle in its propagation direction, thereby avoiding calculating the distance between the CT gantry cover and the CT scanning bed board during movement. The judgment method is simple and convenient, and errors and omissions are avoided. The judgment is accurate, and simultaneous protection is achieved against the upper end of the CT gantry cover squeezing the patient and the lower end of the CT gantry cover colliding with the CT scanning bed board. Compared with the prior art which only prevents squeezing of the upper end of the CT gantry cover, the collision between the CT gantry cover and the CT scanning bed is effectively avoided.

[0030] At the same time, by providing a misoperation processing unit, the present invention can identify misoperations such as physician positioning, thereby avoiding frequent shutdowns of the CT.

[0031] In addition, the control feedback unit in the present invention completes collision judgment through real-time monitoring of the collision distance sensor and the infrared sensing sensor. Compared with the prior art that uses the CT's own position information to calculate through software, the data on the real-time movement of the CT is more accurate, and the control method is simpler, the calculation time is short, and the response speed is fast, which is conducive to real-time protection of the CT during movement.

[0032] In addition, the present invention also provides a CT collision protection method for the above-mentioned CT collision protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0034] Figure 1 This is a simplified schematic diagram of the movement of the CT gantry cover when it tilts forward;

[0035] Figure 2 A schematic structural diagram of a specific embodiment of the CT collision protection device provided by the present invention;

[0036] Figure 3 for Figure 2 A simplified schematic diagram of the installation location of the collision distance sensor;

[0037] Figure 4 for Figure 2 A simplified schematic diagram of the first malfunction near the sensor installation location;

[0038] Figure 5 for Figure 2 A simplified schematic diagram of the second malfunction near the sensor installation location;

[0039] Figure 6 A control principle diagram of a specific embodiment of the CT collision protection device provided by the present invention;

[0040] Figure 7 The figure is a flow chart of a specific embodiment of the CT collision protection method provided by the present invention.

[0041] Figure 1-Figure 7 middle:

[0042] 1 is the CT gantry cover, 101 is the CT gantry cover aperture, 2 is the CT scanning bed body, 3 is the CT scanning bed board, 4 is the collision distance sensor, 5 is the infrared sensor, 6 is the malfunction proximity sensor, 7 is the distance sensor, 8 is the malfunction processing unit, 9 is the control feedback unit, 10 is the CT motion module, 11 is the controller, a is the line between the upper end of the CT gantry cover front cover and the CT gantry cover axis, b is the line between the lower end of the CT gantry cover front cover and the CT gantry cover axis, c is the line between the lower end of the CT gantry cover rear cover and the CT gantry cover axis, d is the CT gantry cover The line connecting the upper end of the rear cover and the axis of the CT gantry cover, e is the line connecting the upper end of the front cover of the CT gantry cover after tilting forward and the axis of the CT gantry cover, f is the line connecting the lower end of the front cover of the CT gantry cover after tilting forward and the axis of the CT gantry cover, g is the line connecting the lower end of the rear cover of the CT gantry cover after tilting forward and the axis of the CT gantry cover, h is the line connecting the upper end of the rear cover of the CT gantry cover after tilting forward and the axis of the CT gantry cover, m is the detection direction of the collision distance sensor, x is the distance from the detection direction of the collision distance sensor to the symmetry plane of the CT scanning bed in the length direction, and y is the height from the collision distance sensor to the bed board of the CT scanning bed. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The core of the present invention is to provide a CT collision protection device, which can effectively prevent the CT scanning bed from colliding with the CT frame cover, and has a simple structure and low cost.

[0045] In addition, the present invention also provides a CT collision protection method applied to the above-mentioned CT collision protection device.

[0046] Please refer to Figure 1-Figure 7 , simplified schematic diagram of the movement of the CT gantry cover when it tilts forward; Figure 2 A schematic structural diagram of a specific embodiment of the CT collision protection device provided by the present invention; Figure 3 for Figure 2 A simplified schematic diagram of the installation location of the collision distance sensor; Figure 4 for Figure 2 A simplified schematic diagram of the first malfunction near the sensor installation location; Figure 5 for Figure 2 A simplified schematic diagram of the second malfunction near the sensor installation location; Figure 6A control principle diagram of a specific embodiment of the CT collision protection device provided by the present invention; Figure 7 The figure is a flow chart of a specific embodiment of the CT collision protection method provided by the present invention.

[0047] The CT collision protection device provided by the present invention comprises:

[0048] A collision distance sensor 4 is vertically arranged on the end surface of the CT scanning bed body 2 close to the CT gantry cover 1, and outputs a warning message when it detects that the CT gantry cover 1 enters the safe distance of the CT scanning bed board 3;

[0049] The infrared sensor 5 disposed on the upper end of the CT gantry cover 1 outputs a warning message after detecting that the patient under examination leaves the safe area;

[0050] a misoperation processing unit 8, configured to output a collision signal when one of the CT scanning bed board 3 and the CT gantry cover 1 moves;

[0051] The control feedback unit 9 connected to the CT motion module 10, the collision distance sensor 4, the infrared sensor 5 and the malfunction processing unit 8 are all connected to the control feedback unit 9 to control the CT motion module 10 to stop moving when the warning information and the collision signal are received at the same time.

[0052] It should be noted that the safety distance is the distance between the collision distance sensor 4 and the CT scanning bed board 3 .

[0053] Please refer to Figure 1 The collision distance sensor 4 is arranged perpendicular to the end surface of the CT scanning bed body 2, and its detection direction is parallel to the length direction of the CT scanning bed body 2, that is, the detection direction of the collision distance sensor 4 is parallel to the axial direction of the CT gantry cover 1.

[0054] Please refer to Figure 3 In the figure, x represents the distance from the detection direction of the collision distance sensor 4 to the symmetric plane of the CT scanning bed body 2 in the length direction, and y represents the height from the collision distance sensor 4 to the CT scanning bed board 3.

[0055] Depend on Figure 3 It can be seen that during the CT movement, the two sides of the CT scanning bed board 3 in the width direction are most likely to collide with the CT gantry cover 1, and the setting of the safety distance should be based on the two sides of the CT scanning bed board 3 in the width direction not colliding with the CT gantry cover 1. That is, when the CT gantry cover 1 enters the safety distance of the collision distance sensor 4, the CT gantry cover 1 and the CT scanning bed board 3 still do not collide, and at this time, the height y of the collision distance sensor 4 is the safety height.

[0056] It should be noted that the safety distance of the collision distance sensor 4 is related to the specific position x at which the collision distance sensor 4 is set. Under the condition that the sizes of the CT gantry cover 1 and the CT scanning bed are certain, please refer to Figure 3 The larger the distance x from the collision distance sensor 4 to the symmetric plane of the CT scanning bed body 2 in the length direction, the higher the height of the collision distance sensor 4 in the vertical direction and the closer it is to the bottom surface of the CT scanning bed board 3, the smaller the safety distance.

[0057] The number of collision distance sensors 4 is also related to the specific locations where they are set. For example, when the collision distance sensor 4 is set on the axis of the CT scanning bed 2 in the length direction, the distances from the collision distance sensor 4 to the CT scanning bed 2 in the width direction and the height direction are both the maximum distances. Therefore, the collision distance sensor 4 is least disturbed by erroneous actions such as the doctor's positioning. Therefore, only one collision distance sensor 4 can be set; when the collision distance sensor 4 is set at the edge of the CT scanning bed 2 in the width direction, due to the small safety distance and the fact that it is set at the edge of the CT scanning bed 2, the detection of the collision distance sensor 4 is easily disturbed by the doctor's positioning, the clothing of the patient being examined, etc. Therefore, two collision distance sensors 4 are respectively set on both sides of the CT scanning bed 2 in the width direction, and the interference of erroneous actions on the detection is reduced by detecting both at the same time.

[0058] Preferably, considering the cost and malfunction interference issues, the axis of the collision distance sensor 4 may be arranged to coincide with the axis of the CT scanning bed body 2 in the length direction.

[0059] Since the CT gantry cover 1 tilts forward and backward, the CT scanning bed body 2 moves vertically up and down, and the CT scanning bed board 3 moves forward and backward in the longitudinal direction during the CT motion scanning process, the motion relationship is relatively complex and needs to be simplified accordingly to facilitate collision detection.

[0060] Please refer to Figure 1 1 is a simplified schematic diagram of the movement of the CT gantry cover 1 when it tilts forward, in which a is a line connecting the upper end of the front cover of the CT gantry cover 1 and the axis of the CT gantry cover 1, b is a line connecting the lower end of the front cover of the CT gantry cover 1 and the axis of the CT gantry cover 1, c is a line connecting the lower end of the rear cover of the CT gantry cover 1 and the axis of the CT gantry cover 1, d is a line connecting the upper end of the rear cover of the CT gantry cover 1 and the axis of the CT gantry cover 1, e is a line connecting the upper end of the front cover of the CT gantry cover 1 and the axis of the CT gantry cover 1 after tilting forward, f is a line connecting the lower end of the front cover of the CT gantry cover 1 and the axis of the CT gantry cover 1 after tilting forward, g is a line connecting the lower end of the rear cover of the CT gantry cover 1 and the axis of the CT gantry cover 1 after tilting forward, h is a line connecting the upper end of the rear cover of the CT gantry cover 1 and the axis of the CT gantry cover 1 after tilting forward, and m is the detection direction of the collision distance sensor 4.

[0061] Depend on Figure 1 It can be seen that when the position of the CT scanning bed is determined, the forward and backward tilting movement of the CT gantry cover 1 is similar to a seesaw, that is, when one end is relatively close to the CT scanning bed board 3, the other end is relatively far away from the CT scanning bed board 3. Therefore, there is a possibility of missing the risk of collision when a distance sensor is arranged on the CT gantry cover 1 to detect the distance between the two. For example, when the CT gantry cover 1 tilts forward, the distance between the distance sensor and the CT scanning bed board 3 will increase as the degree of proximity between the two increases.

[0062] Therefore, in order to avoid the risk of missed collision, the collision distance sensor 4 is set on the CT scanning bed, or the distance sensor is set at multiple positions of the CT gantry cover 1. Considering the installation cost of the sensor and the increased risk of malfunction introduced by multiple sensors, the collision distance sensor 4 is set on the CT scanning bed. Considering that the vertical lifting of the CT scanning bed board 3 is achieved by the vertical lifting of the CT scanning bed body 2, the collision distance sensor 4 is set on the CT scanning bed body 2 to ensure that the safety distance from the collision distance sensor 4 to the CT scanning bed board 3 will not change during the vertical lifting process.

[0063] Preferably, the collision distance sensor 4 may include an ultrasonic distance sensor, an infrared distance sensor or a photoelectric distance sensor. When in use, the collision distance sensor 4 emits ultrasonic waves, infrared rays or lasers to detect whether there is an obstacle in its detection direction m. If there is an obstacle, it means that the CT gantry cover 1 has entered the safe distance of the CT scanning bed board 3 and there is a risk of collision if it continues to move. The collision distance sensor 4 outputs a warning message to the control feedback unit 9.

[0064] Of course, the collision distance sensor 4 can also be configured as any other structure with similar distance functions, such as a proximity switch.

[0065] The infrared sensing sensor 5 detects whether the patient under examination is in the safe area through infrared, determines whether there is a risk of the upper end of the CT gantry cover 1 squeezing the patient under examination, and outputs warning information to the control feedback unit 9 when the above risk exists.

[0066] Since the detection of the collision distance sensor 4 may be affected by the doctor's positioning and other factors and may result in misjudgment, in order to avoid frequent shutdowns of the CT, it is necessary to set up a misoperation processing unit 8 to analyze whether there is a possibility of collision in the current motion state of the CT.

[0067] The CT scanning bed and the CT gantry cover 1 are both provided with a controller 11. By connecting the malfunction processing unit 8 to the controller 11, the motion information of the CT scanning bed board 3 and the motion information of the CT gantry cover 1 can be obtained and the collision possibility can be analyzed accordingly.

[0068] Preferably, the malfunction processing unit 8 can be set as an AND-OR gate circuit, which outputs a high level when any one of the CT gantry cover 1 and the CT scanning bed board 3 moves, thereby converting the movement information of the two into a circuit control signal.

[0069] The control feedback unit 9 may include a collision conversion circuit and an AND gate circuit, and the AND gate circuit is connected to the motor control circuit of the CT motion module 10. The collision conversion circuit is connected to the collision distance sensor 4 and the infrared sensor 5, and converts the warning information transmitted by the sensor into a high level. The collision conversion circuit and the malfunction processing unit 8 are both connected to the AND gate circuit. When both are high levels, the AND gate circuit outputs a high level, and controls the motor to stop through the motor control circuit of the CT motion module 10, thereby realizing CT shutdown.

[0070] Preferably, the control feedback unit 9 can be integrated into the system control unit module of the CT itself to simplify the control circuit structure and save installation space.

[0071] During the CT scanning process, the collision distance sensor 4 detects whether the CT gantry cover 1 enters the safe distance of the CT scanning bed board 3 to prevent the lower end of the CT gantry cover 1 from colliding with the CT scanning bed board 3; the infrared sensing sensor 5 detects whether the patient under examination is in the safe area to prevent the upper end of the CT gantry cover 1 from being too close to the CT scanning bed board 3 and squeezing the patient under examination. When the CT gantry cover 1 enters the safe distance of the CT scanning bed board 3, the collision distance sensor 4 outputs a warning message; when the patient under examination leaves the safe area, the infrared sensing sensor 5 outputs a warning message.

[0072] At the same time, the misoperation processing unit 8 determines the possibility of collision between the CT scanning bed board 3 and the CT gantry cover 1 by checking whether the two are moving. If either of the two is in motion, it is determined that there is a possibility of collision and a collision signal is output; otherwise, if both are stationary, it is determined that there is no possibility of collision, which is a misoperation interference such as doctor positioning. When the control feedback unit 9 receives the warning information and the collision signal at the same time, it controls the CT motion module 10 to stop moving.

[0073] In this embodiment, the collision distance sensor 4 is used to detect whether there is an obstacle in its propagation direction, thereby avoiding the calculation of the distance between the CT gantry cover 1 and the CT scanning bed board 3 during the movement. The judgment method is simple and convenient, and it avoids errors and omissions and the judgment is accurate. Therefore, simultaneous protection is achieved against the upper end of the CT gantry cover 1 squeezing the patient and the lower end of the CT gantry cover 1 colliding with the CT scanning bed board 3. Compared with the prior art that only prevents squeezing of the upper end of the CT gantry cover 1, the collision between the CT gantry cover 1 and the CT scanning bed is effectively avoided.

[0074] At the same time, by providing the erroneous action processing unit 8, this embodiment can identify erroneous actions such as physician positioning, thereby avoiding frequent shutdown of the CT.

[0075] In addition, the control feedback unit 9 in this embodiment completes collision judgment through real-time monitoring of the collision distance sensor 4 and the infrared sensing sensor 5. Compared with the prior art that uses the CT's own position information to calculate through software, the data on the real-time movement of the CT is more accurate, and the control method is simpler, the calculation time is short, and the response speed is fast, which is conducive to real-time protection of the CT during movement.

[0076] On the basis of the above embodiment, a false action proximity sensor 6 connected to the false action processing unit 8 may be further included, the false action proximity sensor 6 is installed on the CT scanning bed body 2, and the detection direction of the false action proximity sensor 6 is not parallel to the detection direction of the collision distance sensor 4; when the false action proximity sensor 6 does not detect an obstacle in its detection direction, the false action processing unit 8 outputs a collision signal.

[0077] Preferably, a misoperation proximity sensor 6 may be provided on each side of the CT scanning bed body 2. Figure 4 and Figure 5 As shown, with the direction in which the CT scanning bed board 3 approaches the CT gantry cover 1 as the front view direction, a first malfunction proximity sensor is provided on the right side surface of the CT scanning bed body 2, and a second malfunction proximity sensor is provided on the left side surface of the CT scanning bed body 2.

[0078] Preferably, the first malfunction proximity sensor and the second malfunction proximity sensor may be arranged symmetrically with respect to a symmetric plane of the CT scanning bed body 2 in the length direction.

[0079] Preferably, the malfunction proximity sensor 6 may include a diffuse reflection photoelectric switch, a capacitive proximity sensor or a magnetic proximity sensor.

[0080] The type and specification of the first malfunction proximity sensor and the type and specification of the second malfunction proximity sensor may be the same or different. Preferably, the types and specifications of the two are the same to reduce the number of parts in the device and improve the interchangeability of parts.

[0081] In this embodiment, since the detection direction of the false action proximity sensor 6 is not parallel to the detection direction of the collision distance sensor 4, the false action proximity sensor 6 can detect whether there are obstacles in the width direction of the CT scanning bed 2. The existence of obstacles in the width direction of the CT scanning bed 2 is not caused by CT movement but by the doctor's positioning, etc. Therefore, the false action proximity sensor 6 can further eliminate the false action situation, thereby improving the judgment accuracy and reliability of the false action processing unit 8.

[0082] Preferably, the detection direction of the malfunction proximity sensor 6 may be set to be perpendicular to the detection direction of the collision distance sensor 4 .

[0083] On the basis of the above embodiment, a distance sensor 7 connected to the control feedback unit 9 may be further included. The distance sensor 7 is arranged on the end surface of the CT scanning bed body 2 away from the CT gantry cover 1 to detect whether the CT scanning bed board 3 exits the CT gantry cover aperture 101 of the CT gantry cover 1; when the distance sensor 7 detects that the CT scanning bed board 3 exits the CT gantry cover aperture 101, the control feedback unit 9 controls the CT motion module 10 to automatically rise and fall through the CT scanning bed body 2.

[0084] According to the length of the CT scanning bed body 2, the length of the CT scanning bed board 3 and the minimum straight-line distance from the CT scanning bed body 2 to the CT gantry cover 1, the distance between the CT scanning bed board 3 and the end surface of the CT scanning bed body 2 away from the CT gantry cover 1 when the CT scanning bed board 3 just exits the CT gantry cover aperture 101 can be calculated, and this distance is used as the exit distance.

[0085] When the distance detected by the distance sensor 7 is greater than the exit distance, the control feedback unit 9 determines that the CT scanning bed board 3 is still located within the CT gantry cover aperture 101, and the control feedback unit 9 controls the CT scanning bed body 2 to be lifted and lowered at a slower speed through the CT motion module 10, so as to prevent the lifting and lowering speed from being too fast and the CT scanning bed board 3 from colliding with the CT gantry cover 1; when the distance detected by the distance sensor 7 is less than or equal to the exit distance, the control feedback unit 9 determines that the CT scanning bed board 3 exits the CT gantry cover aperture 101, and the control feedback unit 9 controls the CT scanning bed body 2 to be lifted and lowered freely through the CT motion module 10, and its movement is no longer restricted by the warning information output by the collision distance sensor 4, so as to facilitate the rapid progress of the CT scanning process and improve the detection and scanning efficiency.

[0086] Preferably, the distance sensor 7 can be arranged on the axis of the length direction of the CT scanning bed body 2 .

[0087] The distance sensor 7 may be an ultrasonic distance sensor, an infrared distance sensor, or any other structure having a distance measurement function.

[0088] In addition to the above-mentioned CT collision protection device, the present invention also provides a CT collision protection method including the CT collision protection device disclosed in the above-mentioned embodiment, please refer to Figure 4 , the CT collision protection method includes:

[0089] Step S1, detecting whether the CT gantry cover 1 is within the safe distance of the CT scanning bed board 3, and detecting whether the patient to be examined is within the safe area;

[0090] Step S2, determining whether there is relative movement between the CT scanning bed board 3 and the CT gantry cover 1 to avoid malfunction;

[0091] Step S3, when there is no malfunction and the CT gantry cover 1 enters the safe distance of the CT scanning bed board 3 and / or the patient enters outside the safe area, the CT is controlled to stop moving.

[0092] It is necessary to explain step S1 that detecting whether the CT gantry cover 1 is within the safe distance of the CT scanning bed board 3 is used to prevent the lower end of the CT gantry cover 1 from colliding with the CT scanning bed board 3; detecting whether the patient to be examined is located in the safe area is used to prevent the upper end of the CT gantry cover 1 from squeezing the patient to be examined.

[0093] Preferably, a collision distance sensor 4 such as an ultrasonic distance sensor or an infrared distance sensor can be used to detect whether the CT gantry cover 1 is located within the safe distance of the CT scanning bed board 3. The collision distance sensor 4 is vertically arranged on the end surface of the CT scanning bed body 2 close to the CT gantry cover 1. The collision distance sensor 4 emits ultrasonic waves, infrared rays, etc. to detect whether there are obstacles in the propagation direction. If there are obstacles, it is considered that the CT gantry cover 1 enters the safe distance of the CT scanning bed board 3.

[0094] It is necessary to explain step S2 that, under the detection mode of step S1, when the doctor is positioned, the doctor or his clothes may enter the safe area of ​​the CT scanning bed board 3, causing the CT to shut down erroneously. Therefore, in order to prevent frequent shutdowns, it is necessary to determine whether there is a possibility of collision between the two. The possibility of collision between the CT scanning bed board 3 and the CT gantry cover 1 can be determined by whether there is relative motion between the two, and by eliminating the possibility of erroneous operation.

[0095] Preferably, the motion information transmitted by the controller 11 of the CT can be used to determine whether there is relative motion between the CT scanning bed board 3 and the CT gantry cover 1. When both are stationary, it is considered that there is no possibility of collision, otherwise there is a risk of collision.

[0096] The doctor's misalignment caused by positioning can be identified by detecting whether there are obstacles in the width direction of the CT scanning bed 2 because the doctor stands near the CT scanning bed 2 .

[0097] It should be noted that the first and second in the first malfunction sensing sensor and the second malfunction sensing sensor in the present application are only used to distinguish the difference in position, and do not contain any limitation on the order.

[0098] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0099] The CT collision protection device and the CT collision protection method provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A CT collision protection device, characterized in that: include: A collision distance sensor (4) vertically arranged on an end surface of the CT scanning bed body (2) close to the CT gantry cover (1) outputs a warning message when detecting that the CT gantry cover (1) enters within a safe distance of the CT scanning bed board (3); An infrared sensor (5) disposed at the upper end of the CT gantry cover (1) outputs the warning information after detecting that the patient under examination has left the safe area; A misoperation processing unit (8) configured to output a collision signal when one of the CT scanning bed board (3) and the CT gantry cover (1) moves; a control feedback unit (9) connected to a CT motion module (10), the collision distance sensor (4), the infrared sensor (5) and the malfunction processing unit (8) all being connected to the control feedback unit (9) so as to control the CT motion module (10) to stop moving when the warning information and the collision signal are received simultaneously; It also includes a false action proximity sensor (6) connected to the false action processing unit (8), the false action proximity sensor (6) being installed on the CT scanning bed body (2), and the detection direction of the false action proximity sensor (6) is not parallel to the detection direction of the collision distance sensor (4); When the malfunction proximity sensor (6) detects no obstacle in its detection direction, the malfunction processing unit (8) outputs a collision signal.

2. The CT collision protection device according to claim 1, characterized in that: The axis of the collision distance sensor (4) coincides with the axis of the CT scanning bed body (2) in the length direction.

3. The CT collision protection device according to claim 1, characterized in that: The collision distance sensor (4) comprises an ultrasonic distance sensor, an infrared distance sensor or a photoelectric sensor.

4. The CT collision protection device according to claim 1, characterized in that: The detection direction of the malfunction proximity sensor (6) is perpendicular to the detection direction of the collision distance sensor (4).

5. The CT collision protection device according to claim 1, characterized in that: The malfunction proximity sensor (6) comprises a diffuse reflection photoelectric switch, a capacitive proximity sensor or a magnetic proximity sensor.

6. The CT collision protection device according to claim 1, characterized in that: It also includes a distance sensor (7) connected to the control feedback unit (9), the distance sensor (7) being arranged on an end surface of the CT scanning bed body (2) away from the CT gantry cover (1) to detect whether the CT scanning bed board (3) has exited the CT gantry cover aperture (101) of the CT gantry cover (1); When the distance sensor (7) detects that the CT scanning bed board (3) has exited the CT gantry cover aperture (101), the control feedback unit (9) controls the CT scanning bed body (2) to freely rise and fall via the CT motion module (10).

7. A CT collision protection method, applicable to the CT collision protection device according to any one of claims 1 to 6, characterized in that: include: Detecting whether a CT gantry cover (1) is present within a safe distance of a CT scanning bed board (3), and detecting whether a patient under examination is located within a safe area; Determining whether there is relative movement between the CT scanning bed board (3) and the CT gantry cover (1) and / or determining whether there is a possibility of malfunction, so as to avoid malfunction; When the malfunction does not occur and the CT gantry cover (1) enters the safe distance of the CT scanning bed board (3) and / or the patient under examination enters outside the safe area, the CT is controlled to stop moving.

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