CN107132239B - Alignment system of medical equipment and position precision monitoring method of motion unit - Google Patents
Alignment system of medical equipment and position precision monitoring method of motion unit Download PDFInfo
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Abstract
The invention discloses a collimation system of medical equipment and a position precision monitoring method of a motion unit. The collimation system comprises an execution assembly, a driving assembly for driving the execution assembly to move along the guide mechanism and a monitoring mechanism for monitoring the movement position precision of the execution assembly, wherein the monitoring mechanism comprises a position feedback device, a switch assembly, a trigger and a controller, and the position feedback device is connected with the driving assembly; the trigger is used for triggering the switch assembly, one of the switch assembly and the trigger moves along with the execution assembly, the switch assembly comprises a first switch and a second switch, and the first switch and the second switch are matched with the trigger; the controller is respectively electrically connected with the first switch, the second switch and the position feedback device, and the controller is used for receiving feedback signals of the first switch, the second switch and the position feedback device so as to monitor the movement position precision of the execution assembly. And the controller compares the reading of the position feedback device of the second switch relative to the first switch with the standard value to judge whether the position precision is normal.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a collimation system of medical equipment and a motion unit position precision monitoring method applied to the collimation system.
Background
The medical appliance industry relates to a plurality of industries such as medicine, machinery, electronics, plastics and the like, and is a high-technology industry with multidisciplinary intersection, knowledge concentration and fund concentration. With the rapid improvement of research and development forces of domestic and foreign enterprises and the shift of the market center of gravity from high technology to popular type, the precision requirement of medical instruments is higher and higher.
Computed Tomography (CT) is a device that scans a certain part of a human body according to a certain thickness of a layer surface by an X-ray beam and converts a ray signal reflected by the human body into an image through computer processing. In order to control the width and thickness of the X-ray beam, the CT apparatus further includes a slice system, an opening for the X-ray beam to pass through is formed on a slice of the slice system, and before scanning a specific part of a human body, the opening of the slice system needs to be moved to a part to be scanned of a patient. Therefore, in order to ensure the scanning quality, the driving accuracy of the driving device must be ensured.
The absolute position of the slice in the prior art is typically obtained by a motor with encoder feedback and a fixed position zero switch. Firstly, determining a zero position, wherein a motor driving a slice to move rotates to a zero position switch position or the motor drives the slice to move to the zero position switch position, and marking the position as the zero position; all position parameters to which the slice is moved are then determined relative to the zero position. The method has the defects that when the zero switch signal is subjected to electrical interference and is abnormal, or an encoder counting chip fails, or a cable is aged and broken, or mechanical parts are worn due to long-term movement and large gaps occur, the measurement of the absolute position of the slice is abnormal, and the preset positioning precision cannot be realized.
The prior art solution is to add another position feedback system. However, the feedback method has a complex structure, high cost and severe environmental requirements.
Disclosure of Invention
A first object of the invention is to propose a collimation system of a medical device capable of detecting the position accuracy of a movement unit.
In order to achieve the purpose, the invention adopts the following technical scheme:
an alignment system for a medical device, comprising an actuator assembly, a drive assembly for driving the actuator assembly along a guide mechanism, and a monitoring mechanism for monitoring the accuracy of the position of the actuator assembly, the monitoring mechanism comprising:
the position feedback device is connected with the driving assembly;
the switch assembly comprises a first switch and a second switch, and the first switch and the second switch are matched with the trigger;
the controller is respectively electrically connected with the first switch, the second switch and the position feedback device, and the controller is used for receiving feedback signals of the first switch, the second switch and the position feedback device so as to monitor the motion position accuracy of the executive component.
Wherein either one of the switch assembly and the trigger is connected to the actuating assembly, the other is adjacently arranged beside the guide mechanism, and the switch assembly is arranged to be matched with the trigger in different orders.
The driving assembly comprises a transmission assembly and a motor, an output shaft of the motor is connected with the transmission assembly, the transmission assembly is connected with the execution assembly and drives the execution assembly to move along the guide mechanism, and the motor is connected with the position feedback device.
The transmission assembly comprises a lead screw and a nut, the lead screw is connected with an output shaft of the motor through a coupler, and the nut is matched with the lead screw and connected with the execution assembly; or the transmission assembly comprises a gear and a rack, the gear is connected with an output shaft of the motor, and the rack is matched with the gear and connected with the execution assembly.
The switch assembly is a Hall sensor, and the trigger is a magnetic sheet matched with the Hall sensor; or one of the trigger and the switch assembly is an infrared photoelectric sensor transmitting end, and the other one is an infrared photoelectric sensor receiving end; or the trigger is a shielding sheet, the switch assembly comprises an infrared photoelectric sensor transmitting end and an infrared photoelectric sensor receiving end which are oppositely arranged, and the trigger penetrates through the space between the infrared photoelectric sensor transmitting end and the infrared photoelectric sensor receiving end.
The alarm device comprises a guide mechanism, a controller and a trigger, and is characterized by further comprising a limit position switch and an alarm, wherein the limit position switch is arranged on one side of the guide mechanism and close to the end part of the guide mechanism, the limit position switch and the alarm are electrically connected with the controller, and when the trigger triggers the limit position switch, the controller sends an alarm signal to the alarm.
The device comprises a guide mechanism, and is characterized by further comprising a limiting device, wherein the limiting device is arranged at the end part of the guide mechanism and used for preventing the execution assembly from being separated from the guide mechanism.
The limiting device comprises a limiting block, and a buffer layer is arranged on one side, facing the guiding mechanism, of the limiting block.
Wherein the medical device is a CT device and the executive component is a slice.
A second object of the invention is to propose a monitoring method capable of detecting the accuracy of the position of the moving unit.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of monitoring positional accuracy of a mobile unit, comprising:
s1: the driving component drives the execution component to move along the guide mechanism to drive the trigger to trigger the first switch and the second switch;
s2: the controller takes the trigger position of the first switch as a zero point and the trigger position of the second switch as a check point, and obtains a change value of the reading of the position feedback device between the zero point and the check point;
s3: and the controller compares the change value with a pre-stored standard value of the reading change of the position feedback device between the zero point and the check point, and judges whether the position precision of the movement is normal.
Wherein, step S3 specifically includes:
if the change value of the reading of the position feedback device is different from a preset standard value or exceeds a preset threshold range, the controller records the obtained change value of the reading of the encoder and gives an alarm; if the change value of the reading of the position feedback device is the same as the preset standard value or does not exceed the preset threshold range, the controller records the obtained change value of the reading of the position feedback device, and the driving assembly works normally.
Wherein, step S3 specifically includes:
if the change value of the reading of the position feedback device is different from the preset standard value or exceeds the preset threshold range, repeating the step S1 and the step S2, comparing the change values of the reading of the position feedback device obtained twice by the controller, and if the change values of the reading of the position feedback device are the same, giving an alarm by the controller; if not, the steps S1-S3 are repeated.
Has the advantages that: the invention provides a collimation system of medical equipment and a position precision monitoring method of a motion unit. The alignment system of the medical equipment comprises an execution assembly, a driving assembly and a monitoring mechanism, wherein the driving assembly drives the execution assembly to move along a guide mechanism, the monitoring mechanism is used for monitoring the movement position precision of the execution assembly, the monitoring mechanism comprises a position feedback device, a switch assembly, a trigger and a controller, and the position feedback device is connected with the driving assembly; the trigger is used for triggering the switch assembly, and one of the switch assembly and the trigger moves along with the executing assembly, wherein the switch assembly comprises a first switch and a second switch which are matched with the trigger; the controller is respectively electrically connected with the first switch, the second switch and the position feedback device, and is used for receiving feedback signals of the first switch, the second switch and the position feedback device so as to monitor the motion position accuracy of the actuating assembly. After the collimation system is electrified, the driving assembly firstly drives the execution assembly to move along the guide mechanism, the trigger respectively triggers the first switch and the second switch, the position of the first switch is taken as a zero point position, the controller compares the reading of the position feedback device of the second switch relative to the zero point position with a preset standard value, and judges whether the position precision of the execution assembly is normal or not, so that the problem of the movement precision caused by abnormal signals of the first switch, abnormal feedback signals of the position feedback device or long-term abrasion of mechanical parts is prevented, and the safety and the stability of the system are ensured.
Drawings
FIG. 1 is a top view of a collimation system of a medical device as provided in embodiment 1 of the invention;
FIG. 2 is a first schematic structural diagram of a collimation system of a medical device provided in embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram ii of a collimation system of a medical apparatus provided in embodiment 1 of the present invention;
fig. 4 is a flowchart of a method for monitoring the positional accuracy of a motion unit according to embodiment 2 of the present invention.
Wherein:
1. an execution component; 11. a trigger;
2. a drive assembly; 21. a motor; 221. a lead screw; 222. a nut; 23. a coupling;
3. a switch assembly; 31. a first switch; 32. a second switch.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
Example 1
As shown in fig. 1-3, the present embodiment provides an alignment system of a medical apparatus, including an actuating assembly 1, a driving assembly 2 for driving the actuating assembly 1 to move along a guiding mechanism, and a monitoring mechanism for monitoring the precision of the movement position of the actuating assembly 1, wherein the monitoring mechanism includes a position feedback device, a switch assembly 3, a trigger 11 for triggering the switch assembly 3, and a controller, the position feedback device is connected with the driving assembly 2, the driving assembly 2 drives the actuating assembly 1 to move along the guiding mechanism, and the guiding mechanism can be fixed on a base; the switch assembly 3 comprises a first switch 31 and a second switch 32, any one of the switch assembly 3 and the trigger 11 can move along with the actuating assembly 1, the first switch 31 and the second switch 32 are matched with the trigger 11, so that when the actuating assembly 1 moves along the guide mechanism, the trigger 11 can trigger the first switch 31 and the second switch 32; the controller is electrically connected with the first switch 31, the second switch 32 and the position feedback device respectively, and the controller is used for receiving feedback signals of the switch assembly 3 and the position feedback device so as to monitor the motion position accuracy of the actuating assembly 1.
Either one of the switch assembly 3 and the trigger 11 may be connected to the actuator assembly 1 so as to move with the actuator assembly 1, and the other one may be disposed adjacent to the side of the guide mechanism as long as the trigger 11 can trigger the switch assembly 3, and the switch assembly 3 is disposed so as to be capable of cooperating with the trigger 11 in a different order. The trigger 11 may trigger the first switch 31 first and then trigger the second switch 32, or trigger the second switch 32 first and then trigger the first switch 31, and the sequence of triggering the switch assembly 3 by the trigger 11 does not affect the normal operation of the collimation system provided in this embodiment. Any one of the switch assemblies 3 is selected as a zero position switch, the other one of the switch assemblies is selected as a check switch, the triggering position of the zero position switch is used as a zero point, the triggering position of the check switch is used as a check point, and the controller compares the difference value of the reading of the position feedback device of the check point relative to the zero point with a preset standard value, so that whether the motion precision of the execution assembly 1 is normal or not is judged, the problem of motion precision caused by the fact that in the prior art, only the set zero position switch signal is abnormal, the position feedback device feedback signal is abnormal or mechanical parts are abraded for a long time is solved, and the safety and the stability of.
In this embodiment, the switch component 3 is disposed adjacent to a side portion of the guiding mechanism, the trigger 11 is disposed on the executing component 1, the executing component 1 drives the trigger 11 to move when moving, and the first switch 31 and the second switch 32 are both on a movement track of the trigger 11, so as to ensure that the trigger 11 can trigger the first switch 31 and the second switch 32 when moving along with the executing component 1. The first switch 31 and the second switch 32 may be located on one side of the guide mechanism, or may be located on both sides of the guide mechanism. When the first switch 31 and the second switch 32 are located on the same side of the guide mechanism, only one of the triggers 11 may be provided, and the first switch 31 and the second switch 32 are distributed along the extending direction of the guide mechanism; when the first switch 31 and the second switch 32 are respectively located at two sides of the guiding mechanism, two triggers 11 need to be arranged on the executing assembly 1, and the first switch 31 and the second switch 32 are respectively correspondingly matched with one trigger 11. Of course, the switch module 3 may be disposed on the actuator module 1, and the trigger 11 may be disposed on a side portion of the guiding mechanism, and the operation principle is substantially the same as that described above, and will not be described herein again.
In a specific implementation manner of this embodiment, the guiding mechanism is a guide rail disposed on the base, and the first switch 31 and the second switch 32 may be fixed on the base beside the guide rail and located on the moving path of the trigger 11.
The actuating assembly 1 in this embodiment may move linearly or curvilinearly along the guiding mechanism, and the movement manner of the actuating assembly 1 does not affect the normal operation of the monitoring mechanism in the collimation system, and is not limited herein.
The driving component 2 comprises a transmission component and a motor 21, an output shaft of the motor 21 is connected with the transmission component, the transmission component is connected with the execution component 1 and drives the execution component 1 to move along the guide mechanism, and the driving component 2 is connected with a position feedback device. When the collimation system is powered on, the driving assembly 2 firstly drives the executing assembly 1 to move along the guide mechanism, so that the trigger 11 respectively triggers the first switch 31 and the second switch 32, the position of the first switch 31 is taken as a zero point, the position of the second switch 32 is taken as a check point, a change value of a reading of the position feedback device corresponding to the zero point and the check point is sent to the controller, the controller compares the change value with a pre-stored standard value of the change of the reading of the position feedback device between the zero point and the check point, and judges whether the position precision of the executing assembly 1 is normal or not, thereby preventing the problem of the movement precision caused by abnormal signals of the first switch 31, abnormal feedback signals of the position feedback device or long-term abrasion of mechanical parts, and ensuring the safety and the stability of the system.
The trigger 11 may trigger the first switch 31 first and then trigger the second switch 32, or trigger the second switch 32 first and then trigger the first switch 31, and trigger the first switch 31 and the second switch 32 without affecting the determination result of the monitoring mechanism, as long as the change value of the reading of the position feedback device between the zero point and the check point is read. The position feedback device in this embodiment may be an encoder, a rotary transformer, a grating scale, a potentiometer, or the like, and it is possible to determine whether the position accuracy of the actuator assembly 1 is normal as long as a change value of measurement data between the zero point and the calibration point can be obtained.
Specifically, the position feedback device is an encoder, and the motor 21 may be a motor with an encoder, or a motor connected to an encoder. Taking the linear motion of the actuating assembly 1 along the guiding mechanism as an example, the transmission assembly in this embodiment may include a lead screw 221 and a nut 222, the lead screw 221 is connected with the output shaft of the motor 21 through a coupler 23, and the nut 222 is engaged with the lead screw 221 and connected with the actuating assembly 1; in another specific implementation manner of this embodiment, the transmission assembly includes a gear and a rack, the gear is connected to the output shaft of the motor 21, and the rack is engaged with the gear and connected to the actuator assembly 1. The transmission assembly may have other structures as long as the rotation of the motor 21 can be converted into linear motion, so as to drive the actuating assembly 1 to move along the guide mechanism.
In other specific implementations of this embodiment, other position feedback devices are adopted, such as a rotary transformer, a potentiometer, etc. matched with the motor, or a grating ruler sensor. The grating ruler sensor comprises a grating ruler and a reading head matched with the grating ruler for use, the reading head is arranged on the executing component 1, and the grating ruler is arranged on a base where the guide mechanism is located and is parallel to the guide mechanism. The present embodiment is not limited to a specific type of position feedback device, as long as the position of the actuator assembly 1 when the trigger 11 triggers the first switch 31 and the second switch 32 can be fed back.
The first switch 31 and the second switch 32 in the switch component 3 may be hall sensors, the trigger 11 may be magnetic sheets cooperating with the hall sensors, when the trigger 11 triggers the first switch 31 or the second switch 32, the first switch 31 and the second switch 32 respectively send signals to the controller, taking the position feedback device as an example of an encoder cooperating with a motor, the controller takes the position of the first switch 31 as a zero point position, and sends the encoder reading to the controller when the trigger 11 triggers the second switch 32, the controller compares the encoder reading with a standard value or a threshold range stored in the controller, when the change value of the encoder reading when the trigger 11 triggers the second switch 32 and is different from the standard value or exceeds the threshold range, the position accuracy of the execution component 1 cannot meet the use requirement, and at this time, the controller records the encoder reading when the trigger 11 triggers the second switch 32, alarming and informing the staff of timely maintenance and treatment; when the controller receives that the reading of the encoder is the same as the standard value or within the threshold range when the trigger 11 triggers the second switch 32, the position accuracy of the actuating assembly 1 can meet the use requirement, and at this time, the driving assembly 2 drives the actuating assembly 1 to continue working. And judging whether the position precision of the current execution assembly 1 is accurate according to the comparison structure, thereby avoiding the phenomenon of abnormal position precision.
The trigger 11 and the switch assembly 3 can also work by infrared photoelectric sensing, for example, the trigger 11 is an emitting end of an infrared photoelectric sensor, the first switch 31 and the second switch 32 in the switch assembly 3 are receiving ends of the infrared photoelectric sensor, and when the trigger 11 moves to the position of the switch assembly 3, the corresponding switches are triggered; the trigger 11 can also be a shielding sheet, the first switch 31 and the second switch 32 in the switch assembly 3 both include an infrared photoelectric sensor transmitting end and an infrared photoelectric sensor receiving end which are arranged oppositely, the trigger 11 passes through the infrared photoelectric sensor transmitting end and the infrared photoelectric sensor receiving end to shield signals between the switch assemblies 3, and thus signals are fed back to the controller. Of course, the trigger 11 may be an infrared photoelectric sensor receiving end, and the switch assembly 3 may be an infrared photoelectric sensor transmitting end, which is not limited herein.
On this basis, the monitoring mechanism that this embodiment provided still includes extreme position switch and alarm, and extreme position switch can set up in one side of guiding mechanism and be close to guiding mechanism's tip, and extreme position switch and alarm all are connected with the controller electricity, and after trigger 11 triggered extreme position switch, the controller sent alarm signal to the alarm to prevent to carry out subassembly 1 and continue to break away from with guiding mechanism after the guiding mechanism motion, otherwise the accident appears, improves the security of carrying out subassembly 1.
In order to further prevent the actuating assembly 1 from being separated from the guide mechanism, the monitoring mechanism further comprises a limiting device, the limiting device is arranged at the end part of the guide mechanism, the actuating assembly 1 is limited in the linear track, and the actuating assembly 1 is prevented from being separated from the guide mechanism. The limiting device can be a limiting block arranged at the end part of the guide mechanism, and a buffer layer can be further arranged on one side, facing the guide mechanism, of the limiting block, so that the execution assembly 1 is prevented from being collided and damaged with the limiting block.
The collimation system provided by the present embodiment may be a slice system in a CT apparatus, the execution assembly 1 being a slice in the slice system, the opening of which defines the thickness of the X-beam. Whether the slice movement precision of the slice system is normal can be judged by utilizing the monitoring mechanism, so that the situation that the opening part of the slice can accurately move to the part to be scanned of the patient is ensured, and the scanning quality of the CT equipment is ensured. The collimation system provided by the embodiment may also be a collimation system in other medical devices, for example, a collimation system in a radiotherapy device, and the actuator assembly 1 is a vane in the collimation system for defining the beam shape.
Example 2
As shown in fig. 4, this embodiment provides a method for monitoring the position accuracy of a moving unit applied to the collimation system in embodiment 1, including:
s1: the driving component 2 drives the executing component 1 to move along the guide mechanism, and drives the trigger 11 to trigger the first switch 31 and the second switch 32;
s2: the controller takes the trigger position of the first switch 31 as a zero point and the trigger position of the second switch 32 as a check point, and obtains a change value of the reading of the position feedback device between the zero point and the check point;
s3: and the controller compares the change value with a pre-stored standard value of the reading change of the position feedback device between the zero point and the check point, and judges whether the position precision of the movement is normal.
The position feedback device in this embodiment may be an encoder, a rotary transformer, a grating scale, a potentiometer, or the like, and it is possible to determine whether the position accuracy of the actuator assembly 1 is normal as long as a change value of measurement data between the zero point and the calibration point can be obtained. The present embodiment will specifically analyze the position feedback device as an encoder.
If the change value of the reading of the encoder is different from a preset standard value or exceeds a preset parameter range, the position precision of the execution component 1 cannot meet the use requirement, and the controller records the obtained change value of the reading of the encoder, gives an alarm and informs a worker to maintain and process in time; if the change value of the reading of the encoder is the same as the preset standard value or does not exceed the preset parameter range, the position precision of the execution assembly 1 can meet the use requirement, the controller records the obtained change value of the reading of the encoder, and the driving assembly 2 works normally. And judging whether the position precision of the current execution assembly 1 is accurate according to the comparison result, thereby avoiding the phenomenon of abnormal position precision. The controller will record the change in encoder readings taken at each check for the staff to query.
In order to avoid erroneous judgment caused by inaccurate reading of the encoder due to accidental factors, when the change value of the reading of the encoder between the zero point and the check point is different from a preset standard value or exceeds a preset parameter range, the steps S1 and S2 can be repeated, a new change value of the reading of the encoder is obtained again, the change values of the reading of the encoder obtained twice are compared, if the change values of the reading of the encoder obtained twice are the same, the monitoring result is accurate, the position precision of the execution assembly 1 can not meet the use requirement, the controller gives an alarm, and the execution assembly 1 stops working; if the reading change values of the encoders obtained twice are different, which indicates that the monitoring result of a certain time is inaccurate, the steps can be repeated at this time, a new reading change value of the encoder is obtained again, the reading change value of the encoder is compared with the preset standard value again, and whether the position precision of the execution component 1 is normal or not is judged.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. An alignment system for a medical device, comprising an actuator assembly (1), a drive assembly (2) for driving the actuator assembly (1) along a guide mechanism, and a monitoring mechanism for monitoring the accuracy of the position of the actuator assembly (1) in its movement, characterized in that the monitoring mechanism comprises:
a position feedback device connected with the drive assembly (2);
a switch assembly (3) and a trigger (11) for triggering the switch assembly (3), one of the switch assembly (3) and the trigger (11) moving with the actuating assembly (1), wherein the switch assembly (3) comprises a first switch (31) and a second switch (32), both the first switch (31) and the second switch (32) cooperating with the trigger (11), one of the first switch (31) and the second switch (32) being a zero switch and the other being a correction switch; and
the controller is respectively electrically connected with the first switch (31), the second switch (32) and the position feedback device, the controller is used for receiving feedback signals of the first switch (31), the second switch (32) and the position feedback device, and the controller compares a change value of readings between the first switch (31) and the second switch (32) according to the position feedback device with a pre-stored standard value of the change of the readings so as to monitor the motion position accuracy of the executive component (1).
2. Collimation system according to claim 1, characterized in that either one of the switch assembly (3) and the trigger (11) is connected to the actuator assembly (1), the other one being arranged adjacent to the side of the guiding means, and in that the switch assembly (3) is arranged to be able to cooperate with the trigger (11) in a different order.
3. The alignment system as claimed in claim 1, wherein the driving assembly (2) comprises a transmission assembly and a motor (21), an output shaft of the motor (21) is connected with the transmission assembly, the transmission assembly is connected with the actuating assembly (1) and drives the actuating assembly (1) to move, and the motor (21) is connected with the position feedback device.
4. The alignment system according to claim 3, wherein the transmission assembly comprises a lead screw (221) and a nut (222), the lead screw (221) is connected with an output shaft of the motor (21) through a coupling (23), and the nut (222) is matched with the lead screw (221) and connected with the actuating assembly (1); or the transmission assembly comprises a gear and a rack, the gear is connected with an output shaft of the motor (21), and the rack is matched with the gear and connected with the execution assembly (1).
5. Collimation system according to any of the claims 1 to 4, characterized in that the switch assembly (3) is a Hall sensor and the trigger (11) is a magnetic sheet cooperating with the Hall sensor; or one of the trigger (11) and the switch component (3) is an infrared photoelectric sensor transmitting end, and the other is an infrared photoelectric sensor receiving end; or the trigger (11) is a shielding sheet, the switch assembly (3) comprises an infrared photoelectric sensor transmitting end and an infrared photoelectric sensor receiving end which are oppositely arranged, and the trigger (11) penetrates through the space between the infrared photoelectric sensor transmitting end and the infrared photoelectric sensor receiving end.
6. A collimating system as in any of claims 1-4, further comprising an extreme position switch and an alarm, said extreme position switch being located on one side of said guide means and near the end of said guide means, said extreme position switch and said alarm being electrically connected to said controller, said controller sending an alarm signal to said alarm when said trigger (11) triggers said extreme position switch.
7. The collimation system according to any of the claims 1 to 4, wherein the medical device is a CT device and the executive component (1) is a slice.
8. A method for monitoring the position accuracy of a motion unit is characterized by comprising the following steps:
s1: the driving component (2) drives the execution component (1) to move along the guide mechanism, and drives the trigger (11) to trigger the first switch (31) and the second switch (32);
s2: the controller takes the trigger position of the first switch (31) as a zero point and the trigger position of the second switch (32) as a check point, and obtains a change value of the reading of the position feedback device between the zero point and the check point;
s3: and the controller compares the change value with a pre-stored standard value of the reading change of the position feedback device between the zero point and the check point, and judges whether the position precision of the movement is normal.
9. The monitoring method according to claim 8, wherein the step S3 specifically includes:
if the change value of the reading of the position feedback device is different from a preset standard value or exceeds a preset threshold range, the controller records the obtained change value of the reading of the encoder and gives an alarm; if the change value of the reading of the position feedback device is the same as the preset standard value or does not exceed the preset threshold range, the controller records the obtained change value of the reading of the position feedback device, and the driving assembly (2) works normally.
10. The monitoring method according to claim 8, wherein the step S3 specifically includes:
if the change value of the reading of the position feedback device is different from the preset standard value or exceeds the preset threshold range, repeating the step S1 and the step S2, comparing the change values of the reading of the position feedback device obtained twice by the controller, and if the change values of the reading of the position feedback device are the same, giving an alarm by the controller; if not, the steps S1-S3 are repeated.
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| CN201710378543.0A CN107132239B (en) | 2017-05-25 | 2017-05-25 | Alignment system of medical equipment and position precision monitoring method of motion unit |
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| CN108592321A (en) * | 2018-03-16 | 2018-09-28 | 珠海格力电器股份有限公司 | Air conditioner control method and system, air conditioner and sensor |
| CN109391711B (en) * | 2018-09-29 | 2021-01-26 | 维沃移动通信有限公司 | Telescopic assembly and terminal equipment |
| CN109770935B (en) * | 2018-12-28 | 2022-04-15 | 上海联影医疗科技股份有限公司 | Collimator correction method and device, CT system and storage medium |
| CN110934610A (en) * | 2019-12-06 | 2020-03-31 | 飞瑞医疗器械(嘉兴)有限公司 | Beam limiter and X-ray generating device |
| JP7482693B2 (en) | 2020-06-09 | 2024-05-14 | 富士フイルムヘルスケア株式会社 | X-ray image diagnostic apparatus and method of operating same |
| CN111686378B (en) * | 2020-07-14 | 2023-02-17 | 上海联影医疗科技股份有限公司 | Bed body movement precision detection method, device, equipment and storage medium |
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Address after: 201807 Shanghai City, north of the city of Jiading District Road No. 2258 Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 Shanghai City, north of the city of Jiading District Road No. 2258 Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |