CN212879350U - CT collision protection device - Google Patents

Abstract

The utility model discloses a CT collision protector, include: the collision distance sensor is vertically arranged on the end face, close to the CT rack housing, of the bed body of the CT scanning bed, and outputs warning information when the CT rack housing is detected to enter the safe distance of the bed plate of the CT scanning bed; the infrared induction sensor is arranged at the upper end of the CT frame cover and outputs warning information after detecting that the detected patient leaves a safe area; a malfunction AND-OR gate circuit which outputs a high level when one of the CT frame cover and the CT scanning bed plate moves; and the collision distance sensor, the infrared induction sensor and the malfunction and OR gate circuit are all connected with the control device so as to control the CT motion module to stop moving when simultaneously receiving the warning information and the high level. The utility model provides a CT collision protector can prevent effectively that CT scanning bed and CT frame housing from bumping, and simple structure, cost are lower.

Description

CT collision protection device

Technical Field

The utility model relates to the technical field of medical equipment, more specifically say, relate to a CT collision protector.

Background

The CT is widely applied to the field of clinical medicine, the CT scanning bed can move longitudinally forward and backward and vertically lift and move, and the CT frame cover can tilt forward and backward in the scanning process, and the collision protection of the CT is greatly challenged due to the fact that the motion relationship between the CT scanning bed and the CT frame cover is complex.

In the prior art, collision protection is mostly used for preventing a detected patient from being extruded, for example, an infrared sensor is arranged for detecting whether the detected patient is extruded; or the fixed cover shell of the CT scanning bed and the cover shell of the CT frame are made of resistive materials and capacitive materials, and the resistance value/capacitance value of the fixed cover shell is changed to control the CT to stop moving when the fixed cover shell collides with the cover shell of the CT frame. The former can not solve the problem of collision between the CT frame cover and the lower end of the CT scanning bed when the CT scanning bed is inclined, and the infrared sensor has the situation of doctor positioning interference; the latter can solve the problem of collision between the CT frame cover and the lower end of the CT scanning bed when the CT scanning bed is inclined, but the manufacturing cost of the resistive/capacitive CT scanning bed fixing cover and the CT frame cover is extremely high and millions.

In addition, there is also a collision protection method using software algorithm to detect the distance between the CT scanning bed and the CT gantry housing, but this method introduces the calculation risk of software, and there is still a risk of collision.

In summary, how to simply and efficiently prevent the CT scanning bed from colliding with the CT gantry housing is an urgent problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a CT collision protection device, which can effectively prevent the CT scanning bed from colliding with the CT gantry housing, and has a simple structure and a low cost.

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

a CT collision protection device comprising:

the collision distance sensor is vertically arranged on the end face, close to the CT rack housing, of the bed body of the CT scanning bed, and outputs warning information when the CT rack housing is detected to enter the safe distance of the bed plate of the CT scanning bed;

the infrared induction sensor is arranged at the upper end of the CT rack housing and outputs the warning information after detecting that the detected patient leaves a safe area;

a malfunction and or gate circuit which outputs a high level when one of the CT frame cover and the CT scanning bed plate moves;

and the collision distance sensor, the infrared induction sensor and the false action and OR gate circuit are all connected with the control device so as to control the CT motion module to stop moving when the warning information and the high level are received at the same time.

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

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

Preferably, the CT scanning bed further comprises a malfunction approach sensor connected with the malfunction OR gate circuit, the malfunction approach sensor is mounted on the bed body of the CT scanning bed, and the detection direction of the malfunction approach sensor is not parallel to the detection direction of the collision distance sensor;

when the malfunction approach sensor does not detect an obstacle in the detection direction thereof, the malfunction and or gate circuit outputs a high level.

Preferably, a detection direction of the malfunction approach sensor is perpendicular to a detection direction of the touch distance sensor.

Preferably, the malfunction proximity sensor includes a diffuse reflection photoelectric switch, a capacitance type proximity sensor, or a magnetic proximity sensor.

Preferably, the CT scanning bed further comprises a distance sensor connected with the control device, and the distance sensor is arranged on the end face, far away from the CT frame cover, of the bed body of the CT scanning bed so as to detect whether the bed plate of the CT scanning bed exits from the CT frame cover hole diameter of the CT frame cover;

when the distance sensor detects that the bed plate of the CT scanning bed is withdrawn from the aperture of the CT frame housing, the control device controls the bed body of the CT scanning bed to freely lift through the CT motion module.

The utility model provides a CT collision protection device, in the CT movement process, a collision distance sensor detects whether a CT frame cover enters the safe distance of a bed plate of a CT scanning bed so as to prevent the lower end of the CT frame cover from colliding with the bed plate of the CT scanning bed; the infrared induction sensor detects whether the detected patient is located in a safe area or not so as to prevent the upper end of the CT frame cover from extruding the detected patient due to the fact that the distance between the upper end of the CT frame cover and the bed plate of the CT scanning bed is too close. When the CT frame cover enters the safe distance of the bed plate of the CT scanning bed, the collision distance sensor outputs warning information; when the detected patient leaves the safe area, the infrared induction sensor outputs warning information.

Meanwhile, the malfunction and OR gate circuit judges whether the bed plate of the CT scanning bed and the cover of the CT frame have collision possibility, and when either one of the two moves, the possibility of collision is judged, and high level is output; otherwise, when both are in a static state, the judgment is that no collision is possible, and the method belongs to misoperation interference such as doctor positioning and the like. And when the control device receives the warning information and the high level at the same time, the control device controls the CT motion module to stop moving.

It should be noted that the safe distance is the distance from the collision distance sensor to the bed plate of the CT scanning bed.

The utility model provides a CT collision protector utilizes collision distance sensor to detect whether there is the barrier in its direction of propagation, the distance of CT frame housing and CT scanning bed board in the calculation motion process has been avoided, it is simple convenient to judge the mode, and the condition of miscarriage has been avoided, judge accurately, and realized to CT frame housing upper end extrusion and examined patient and CT frame housing lower extreme and CT scanning bed board collision protection in the time, compare in the extrusion of only prevention CT frame housing upper end among the prior art, CT frame housing and CT scanning bed collision's emergence has effectively been avoided.

Simultaneously, through setting up malfunction and OR gate circuit, the utility model discloses a examine malfunction such as doctor's pendulum position, avoided CT to frequently shut down.

Furthermore, the utility model discloses well controlling means passes through collision distance sensor and infrared induction sensor's real-time supervision and accomplishes the collision and judge, compares in prior art utilization CT self positional information and passes through software calculation, and is more accurate to the data of the real-time motion condition of CT, and control mode is more simple and convenient, the operating time is short, response speed is fast, is favorable to the real-time protection to in the CT motion process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a simplified schematic diagram of the motion of a CT gantry housing when it is tilted forward;

fig. 2 is a schematic structural diagram of an embodiment of the CT collision protection apparatus provided by the present invention;

FIG. 3 is a simplified schematic illustration of the impact distance sensor mounting location of FIG. 2;

fig. 4 is a simplified schematic diagram of the first malfunction approach sensor mounting location of fig. 2;

fig. 5 is a simplified schematic diagram of the second malfunction approach sensor mounting location of fig. 2;

fig. 6 is a control schematic diagram of a specific embodiment of the CT collision protection device provided by the present invention.

In fig. 1-6:

1 is CT frame cover, 101 is CT frame cover aperture, 2 is CT scanning bed body, 3 is CT scanning bed plate, 4 is collision distance sensor, 5 is infrared induction sensor, 6 is malfunction approach sensor, 7 is distance sensor, 8 is malfunction and OR gate circuit, 9 is control device, 10 is CT motion module, 11 is controller, a is connecting line of CT frame cover front cover upper end and CT frame cover axis, b is connecting line of CT frame cover front cover lower end and CT frame cover axis, c is connecting line of CT frame cover rear cover lower end and CT frame cover axis, d is connecting line of CT frame cover rear cover upper end and CT frame cover axis, e is connecting line of CT frame cover front cover upper end and CT frame cover axis, f is connecting line of CT frame cover front cover lower end and CT frame cover axis after forerake, g is connecting line of CT frame cover rear cover lower end and CT frame cover axis after forerake, h is a connecting line between the upper end of the rear cover of the CT frame cover and the axis of the CT frame cover after the front tilting, 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 symmetrical plane of the CT scanning bed body in the length direction, and y is the height from the collision distance sensor to the bed plate of the CT scanning bed.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a CT collision protection device, which can effectively prevent the collision of the CT scanning bed and the CT frame housing, and has simple structure and lower cost.

Referring to fig. 1-6, the motion of the CT gantry housing when tilted forward is simplified; fig. 2 is a schematic structural diagram of an embodiment of the CT collision protection apparatus provided by the present invention; FIG. 3 is a simplified schematic illustration of the impact distance sensor mounting location of FIG. 2; fig. 4 is a simplified schematic diagram of the first malfunction approach sensor mounting location of fig. 2; fig. 5 is a simplified schematic diagram of the second malfunction approach sensor mounting location of fig. 2; fig. 6 is a control schematic diagram of a specific embodiment of the CT collision protection device provided by the present invention.

The utility model provides a CT collision protector, include:

a collision distance sensor 4 vertically arranged on the end surface of the bed body 2 of the CT scanning bed, which is close to the CT frame encloser 1, and outputs warning information when detecting the safe distance that the CT frame encloser 1 enters the bed plate 3 of the CT scanning bed;

the infrared induction sensor 5 is arranged at the upper end of the CT frame cover 1 and outputs warning information after detecting that the detected patient leaves a safe area;

a malfunction and or gate circuit 8 which outputs a high level when one of the CT frame cover 1 and the CT scanning bed plate 3 moves;

and the control device 9 is used for being connected with the CT motion module 10, and the collision distance sensor 4, the infrared induction sensor 5 and the false operation and OR gate circuit 8 are all connected with the control device 9 so as to control the CT motion module 10 to stop moving when simultaneously receiving the warning information and the high level.

It should be noted that the safe distance is the distance from the collision distance sensor 4 to the bed plate 3 of the CT scanning bed.

Referring to fig. 1, the collision distance sensor 4 is disposed perpendicular to the end surface of the bed body 2 of the CT scanning bed, and the detection direction thereof is parallel to the length direction of the bed body 2 of the CT scanning bed, that is, the detection direction of the collision distance sensor 4 is parallel to the axial direction of the CT gantry housing 1.

Referring to fig. 3, in the figure, x represents a distance from a detection direction of the collision distance sensor 4 to a symmetrical plane of the CT scanning bed 2 in a length direction, and y represents a height from the collision distance sensor 4 to the CT scanning bed plate 3.

As can be seen from fig. 3, in the CT movement process, two sides of the CT scanning bed plate 3 in the width direction most easily collide with the CT frame housing 1, and the safety distance is set based on that the two sides of the CT scanning bed plate 3 in the width direction do not collide with the CT frame housing 1. Namely, when the CT frame cover 1 enters the safety region of the collision distance sensor 4, the CT frame cover 1 and the CT scanning bed plate 3 are not collided, and the height y of the collision distance sensor 4 is the safety height.

It should be noted that the safe distance of the collision distance sensor 4 is related to the specific position x where the collision distance sensor 4 is disposed, and under the condition that the sizes of the CT gantry housing 1 and the CT scanning bed are fixed, referring to fig. 3, the higher the height of the collision distance sensor 4 in the vertical direction is, the closer the collision distance sensor is to the bottom surface of the CT scanning bed plate 3, the smaller the safe distance is.

The number of the collision distance sensors 4 is also related to the specific positions where the collision distance sensors are arranged, for example, when the collision distance sensors 4 are arranged on the axis of the bed body 2 of the CT scanning bed in the length direction, the distances from the collision distance sensors 4 to the bed body 2 of the CT scanning bed in the width direction and the height direction are the maximum distances, so that the collision distance sensors 4 are minimally interfered by misoperation such as doctor positioning, and only one collision distance sensor 4 can be arranged; when the collision distance sensors 4 are arranged at the edge of the CT scanning bed body 2 in the width direction, the safety distance is smaller and the collision distance sensors 4 are arranged at the edge of the CT scanning bed body 2, so that the detection of the collision distance sensors 4 is easily interfered by the positioning of a doctor, the clothes of a detected patient and the like, the two collision distance sensors 4 are respectively arranged at two sides of the CT scanning bed body 2 in the width direction, and the interference of the false action on the detection is reduced by the way of detecting the two collision distance sensors simultaneously.

Preferably, in consideration of cost and malfunction interference, the axis of the collision distance sensor 4 may be overlapped with the axis of the CT scanning bed 2 in the length direction.

Because the CT machine has the back and forth inclined movement of the CT frame cover 1, the vertical lifting movement of the CT scanning bed body 2 and the longitudinal advancing and retreating movement of the CT scanning bed plate 3 in the moving and scanning process, the movement relationship is relatively complex, and the movement relationship is required to be correspondingly simplified so as to facilitate the collision detection.

Referring to a simplified schematic diagram of the movement of the CT gantry housing 1 when it tilts forward in fig. 1, in the diagram, a is a connection line between the upper end of the front cover of the CT gantry housing 1 and the axis of the CT gantry housing 1, b is a connection line between the lower end of the front cover of the CT gantry housing 1 and the axis of the CT gantry housing 1, c is a connection line between the lower end of the rear cover of the CT gantry housing 1 and the axis of the CT gantry housing 1, d is a connection line between the upper end of the rear cover of the CT gantry housing 1 after it tilts forward and the axis of the CT gantry housing 1, e is a connection line between the upper end of the front cover of the CT gantry housing 1 after it tilts forward and the axis of the CT gantry housing 1, f is a connection line between the lower end of the front cover of the CT gantry housing 1 after it tilts forward and the axis of the CT gantry housing 1, h is a connection line between the upper end of the rear cover of the CT gantry housing 1 after it tilts forward and the CT gantry housing.

As can be seen from fig. 1, when the position of the CT scanning bed is determined, the front-back tilting motion of the CT gantry housing 1 is similar to a seesaw, i.e. when one end is relatively close to the bed plate 3 of the CT scanning bed, the other end is relatively far away from the bed plate 3 of the CT scanning bed, so that there is a possibility of missing collision risk in the detection mode that the distance sensor is arranged on the CT gantry housing 1 to detect the distance between the two, for example, the distance sensor arranged at the lower end of the front cover of the CT gantry housing 1 increases with the increase of the proximity between the two when the CT gantry housing 1 tilts forward.

Therefore, in order to avoid missing the risk of collision, the collision distance sensor 4 is disposed on the CT scanning table, or distance sensors are disposed at multiple positions of the CT gantry housing 1. The collision distance sensor 4 is installed on the CT scanning bed in consideration of installation costs of the sensors and an increase in risk of malfunction introduced by the plurality of sensors. Considering that the vertical lifting of the bed plate 3 of the CT scanning bed is realized by the vertical lifting of the bed plate 2 of the CT scanning bed, the collision distance sensor 4 is arranged on the bed plate 2 of the CT scanning bed so as to ensure that the safe distance from the collision distance sensor 4 to the bed plate 3 of the CT scanning bed is not changed in the vertical lifting process.

Preferably, the collision distance sensor 4 may include an ultrasonic distance sensor, an infrared distance sensor, or a photoelectric distance sensor. When the CT scanning bed is used, the collision distance sensor 4 sends out ultrasonic waves, infrared rays or laser to detect whether an obstacle exists in the detection direction m, if the obstacle exists, the safe distance that the CT frame housing 1 enters the CT scanning bed plate 3 is indicated, collision risk exists when the CT scanning bed plate continues to move, and the collision distance sensor 4 outputs warning information to the control device 9.

Of course, the collision distance sensor 4 may be provided in any other structure having a similar function in distance, such as a proximity switch.

The infrared sensor 5 detects whether the detected patient is in a safe area through infrared, judges whether the risk that the upper end of the CT frame housing 1 extrudes the detected patient exists, and outputs warning information to the control device 9 when the risk exists.

Since the detection of the collision distance sensor 4 is influenced by the positioning of a doctor and the like to generate misjudgment, in order to avoid frequent shutdown of the CT, a malfunction and or gate circuit 8 needs to be arranged to analyze whether collision possibly exists in the CT in the current motion state.

The CT scanning bed and the CT frame cover 1 are both provided with controllers 11, and the false operation and OR gate circuit 8 is connected with the controllers 11, so that the motion information of the bed plate 3 of the CT scanning bed and the motion information of the CT frame cover 1 can be obtained, and the possibility of collision can be analyzed according to the motion information.

The control device 9 includes a collision conversion circuit and an and circuit connected to a motor control circuit of the CT motion module 10. The collision conversion circuit is connected with the collision distance sensor 4 and the infrared induction sensor 5, and converts the warning information transmitted by the sensors into high level. The collision conversion circuit and the malfunction and OR gate circuit 8 are all communicated with the AND gate circuit, when the collision conversion circuit and the malfunction and OR gate circuit are both at high level, the AND gate circuit outputs high level, and the motor control circuit of the CT motion module 10 controls the motor to stop rotating so as to realize CT shutdown.

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

In the working process of CT scanning, the collision distance sensor 4 detects whether the CT frame cover 1 enters the safe distance of the bed plate 3 of the CT scanning bed so as to prevent the lower end of the CT frame cover 1 from colliding with the bed plate 3 of the CT scanning bed; the infrared induction sensor 5 detects whether the detected patient is located in a safe area or not so as to prevent the detected patient from being extruded due to the fact that the upper end of the CT machine frame cover 1 is too close to the bed plate 3 of the CT scanning bed. When the CT frame cover 1 enters the safe distance of the bed plate 3 of the CT scanning bed, the collision distance sensor 4 outputs warning information; when the patient leaves the safe area, the infrared sensor 5 outputs warning information.

Meanwhile, the malfunction and OR gate circuit 8 judges whether the bed plate 3 of the CT scanning bed and the cover 1 of the CT frame have collision possibility, and when either one of the two moves, the possibility of collision is judged, and a high level is output; otherwise, when both are in a static state, the judgment is that no collision is possible, and the method belongs to misoperation interference such as doctor positioning and the like. And when the control device receives the warning information and the high level at the same time, the control device controls the CT motion module to stop moving.

In this embodiment, whether there is the barrier in its direction of propagation utilizing collision distance sensor 4 to detect, the distance of CT frame housing 1 and CT scanning bed board 3 has been avoided calculating in the motion process, it is simple convenient to judge the mode, and the condition of mistake and leak has been avoided, it is accurate to judge, consequently, it protects when having realized that the patient is examined and CT frame housing 1 lower extreme and CT scanning bed board 3 collision are examined to CT frame housing 1 upper end extrusion, compare in the extrusion of only preventing CT frame housing 1 upper end among the prior art, effectively avoided the emergence of collision between CT frame housing 1 and CT scanning bed.

Meanwhile, by arranging the false operation and the OR gate circuit 8, the embodiment realizes the discrimination of false operations such as doctor positioning and the like, and avoids the frequent shutdown of the CT.

In addition, the control device 9 in this embodiment completes collision determination through real-time monitoring of the collision distance sensor 4 and the infrared sensor 5, and compared with the prior art that the data of the real-time movement situation of the CT is more accurate by utilizing the position information of the CT itself through software calculation, and the control mode is simpler and more convenient, has short operation time and high response speed, and is beneficial to real-time protection in the movement process of the CT.

On the basis of the above embodiment, the bed may further include a malfunction approach sensor 6 connected to the malfunction and or gate circuit 8, the malfunction approach sensor 6 is mounted on the bed body 2 of the CT scanning bed, and the detection direction of the malfunction approach sensor 6 is not parallel to the detection direction of the collision distance sensor 4; when the malfunction proximity sensor 6 does not detect an obstacle in its detection direction, the malfunction and or gate circuit 8 outputs a high level.

Preferably, one malfunction approach sensor 6 may be disposed on each of two sides of the CT scanning bed body 2, and as shown in fig. 4 and 5, a first malfunction approach sensor is disposed on the right side surface of the CT scanning bed body 2, and a second malfunction approach sensor is disposed on the left side surface of the CT scanning bed body 2, with a direction in which the CT scanning bed plate 3 approaches the CT gantry housing 1 as a front view direction.

Preferably, the first malfunction approach sensor and the second malfunction approach sensor may be arranged to be symmetrical with respect to a symmetry plane of the CT scanning bed 2 in the longitudinal direction.

Preferably, the malfunction proximity sensor 6 may include a diffuse reflection photoelectric switch, a capacitance type proximity sensor, or a magnetic proximity sensor.

The first malfunction proximity sensor may be the same or different in type and specification from the second malfunction proximity sensor, and preferably, both the first malfunction proximity sensor and the second malfunction proximity sensor are provided to be the same in type and specification, thereby reducing the number of parts in the apparatus and improving the interchangeability of the parts.

In the present embodiment, since the detection direction of the malfunction approach sensor 6 is not parallel to the detection direction of the collision distance sensor 4, the malfunction approach sensor 6 can detect whether an obstacle exists in the width direction of the CT scanning bed body 2, and the obstacle existing in the width direction of the CT scanning bed body 2 is not generated by CT movement but generated by doctor positioning or the like, so that the malfunction approach sensor 6 can further eliminate the malfunction, and the accuracy and reliability of the determination of the malfunction and or gate circuit 8 are improved.

Preferably, the detection direction of the malfunction approach sensor 6 may be set to be perpendicular to the detection direction of the collision distance sensor 4.

On the basis of the above embodiment, the bed device may further include a distance sensor 7 connected to the control device 9, wherein the distance sensor 7 is disposed on an end surface of the bed body 2 of the CT scanning bed away from the CT gantry housing 1 to detect whether the bed plate 3 of the CT scanning bed exits from the CT gantry housing aperture 101 of the CT gantry housing 1; when the distance sensor 7 detects that the bed plate 3 of the CT scanning bed is withdrawn from the aperture 101 of the CT frame cover, the control device 9 controls the bed body 2 of the CT scanning bed to freely lift through the CT motion module 10.

According to the length of the bed body 2 of the CT scanning bed, the length of the bed plate 3 of the CT scanning bed and the minimum linear distance from the bed body 2 of the CT scanning bed to the CT frame housing 1, the distance from the bed plate 3 of the CT scanning bed to the end face, far away from the CT frame housing 1, of the bed body 2 of the CT scanning bed when the bed plate 3 of the CT scanning bed just exits from the aperture 101 of the CT frame housing can be calculated, and the distance is used as the exiting distance.

When the distance detected by the distance sensor 7 is greater than the exit distance, the control device 9 judges that the bed plate 3 of the CT scanning bed is still positioned in the aperture 101 of the CT frame housing, and the control device 9 controls the bed body 2 of the CT scanning bed to lift at a reduced speed through the CT motion module 10 so as to prevent the bed plate 3 of the CT scanning bed from colliding with the CT frame housing 1 due to too high lifting speed; when the distance that distance sensor 7 detected is less than or equal to and withdraws from the distance, controlling means 9 judges that CT scanning bed board 3 withdraws from CT frame housing aperture 101 in, controlling means 9 passes through CT motion module 10 control CT scanning bed board 2 freely goes up and down, and its motion no longer receives the restriction of the warning information of collision distance sensor 4 output to make things convenient for going on fast, improving detection scanning efficiency of CT scanning process.

Preferably, the distance sensor 7 can be arranged on the axis of the bed 2 of the CT scanning bed in the length direction.

The distance sensor 7 may be an ultrasonic distance sensor, an infrared distance sensor, or any other structure having a distance measuring function.

In the present specification, the first and second malfunction sensing sensors are used only for distinguishing the difference in position, and do not include any order limitation.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above the utility model provides a CT collision protector has carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (7)

1. A CT collision protection device, comprising:

a collision distance sensor (4) vertically arranged on the end face of the bed body (2) of the CT scanning bed, which is close to the CT frame cover (1), and outputs warning information when detecting that the CT frame cover (1) enters the safe distance of the bed plate (3) of the CT scanning bed;

the infrared induction sensor (5) is arranged at the upper end of the CT rack cover (1), and outputs the warning information after detecting that the patient to be detected leaves a safe area;

a malfunction AND-OR gate circuit (8) which outputs a high level when one of the CT frame cover (1) and the CT scanning bed plate (3) moves;

and the control device (9) is used for being connected with the CT motion module (10), the collision distance sensor (4), the infrared induction sensor (5) and the false operation and OR gate circuit (8) are all connected with the control device (9) so as to control the CT motion module (10) to stop moving when the warning information and the high level are received at the same time.

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 (2) in the length direction.

3. 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 any one of claims 1-3, characterized by further comprising a malfunction approach sensor (6) connected to the malfunction OR gate (8), wherein the malfunction approach sensor (6) is mounted on the bed body (2) of the CT scanning bed, and the detection direction of the malfunction approach sensor (6) is not parallel to the detection direction of the collision distance sensor (4);

when the malfunction approach sensor (6) does not detect an obstacle in the detection direction thereof, the malfunction AND-OR gate circuit (8) outputs a high level.

5. The CT crash guard according to claim 4, characterized in that the detection direction of the malfunction approach sensor (6) is perpendicular to the detection direction of the collision distance sensor (4).

6. The CT crash guard of claim 4, wherein the malfunction proximity sensor (6) comprises a diffusely reflecting photoelectric switch, a capacitive proximity sensor, or a magnetic proximity sensor.

7. The CT collision protection device according to claim 4, further comprising a distance sensor (7) connected to the control device (9), wherein the distance sensor (7) is disposed on an end surface of the CT scanning bed plate (2) away from the CT frame enclosure (1) to detect whether the CT scanning bed plate (3) exits the CT frame enclosure aperture (101) of the CT frame enclosure (1);

when the distance sensor (7) detects that the bed plate (3) of the CT scanning bed exits from the aperture (101) of the CT frame cover, the control device (9) controls the bed body (2) of the CT scanning bed to freely lift through the CT motion module (10).

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