CN108652655B - Method, device, equipment and machine readable storage medium for controlling heat capacity - Google Patents
Method, device, equipment and machine readable storage medium for controlling heat capacity Download PDFInfo
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Abstract
A method, apparatus, device and machine-readable storage medium for controlling thermal capacity are provided. The method comprises the following steps: when the CT bulb tube is switched from a scanning state to a non-scanning state, comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a first preset value; and controlling to close the radiator under the condition that the difference is determined to be lower than a first preset value. The embodiment of the application can avoid the reduction of the service life of the CT bulb tube caused by frequent preheating of the CT bulb tube.
Description
Technical Field
The present application relates to medical devices, and more particularly, to a method, apparatus, device and machine-readable storage medium for controlling thermal capacity.
Background
A CT bulb is a device for generating X-rays in a CT (Computed Tomography) system. The CT bulb tube can be divided into a tube core and a tube shell, wherein the tube core comprises a cathode, a focus, an anode target, a rotating shaft bearing for supporting the anode target, a motor for driving the rotating shaft bearing to rotate and the like, and the tube shell comprises cooling oil, a radiator and the like.
The cathode in the bulb bombards a focus on the anode target by emitting an electron beam to generate X-rays, wherein only a small amount of electrons bombard the focus to generate X-rays, and most of the electrons are finally converted into a form of heat energy. The greater the power applied to the anode target, the greater the exposure power of the bulb, and the more X-rays and heat energy are generated. Because the tube core is in a vacuum environment in which heat transfer can be performed only by radiation, most of the heat of the anode target can be transferred to the cooling oil in the bulb tube shell by radiation transfer, and then the temperature of the cooling oil is reduced by the radiator, so that the temperature in the bulb tube is reduced to prevent the components of the tube core from being damaged by overheating.
The bulb that uses in the CT system at present can cool off completely under the condition that the patient is not scanned for a long time to the overwhelming majority bulb that uses, if scan the patient again, carry out great power exposure under the cold condition and probably lead to CT bulb anode target because expend with heat and contract with cold and damage, in order to prevent this kind of condition emergence, need preheat the bulb.
Wherein, the cold state and the hot state of the bulb are expressed by the bulb heat capacity value. Bulb heat capacity refers to the amount of heat stored by the bulb, usually expressed in percentage terms. When the heat capacity value of the bulb is lower than a certain set value, the bulb is in a cold state, and when the heat capacity value of the bulb is higher than the set value, the bulb is in a hot state. When the bulb is in a cold state, which indicates that the temperature of each part of the bulb is low, a preheating scan needs to be performed before scanning. During preheating scanning, the power loaded on the anode target is started from low power, the power is gradually increased, so that the bulb tube is exposed from the low power, then the exposure power is gradually increased, the operation time of the preheating scanning is generally 2-5 minutes, all parts of the bulb tube can reach the ideal working temperature through the preheating scanning, and then the patient is scanned.
However, if the bulb is frequently pre-heated for scanning, the life of the bulb will be reduced.
Disclosure of Invention
Accordingly, the present application provides a method, an apparatus, a device and a machine-readable storage medium for controlling a thermal capacity to prevent a reduction in the service life of a bulb due to frequent preheating of the bulb.
Specifically, the method is realized through the following technical scheme:
in a first aspect, a method for controlling a thermal capacity is provided, the method is used for controlling the on and off of a radiator in a CT bulb connected with the thermal capacity by a device for controlling the thermal capacity, and the method comprises the following steps:
when the CT bulb tube is switched from a scanning state to a non-scanning state, comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a first preset value;
and controlling to close the radiator under the condition that the difference is determined to be lower than a first preset value.
In a second aspect, there is provided an apparatus for controlling thermal capacity, the apparatus being used for controlling the on and off of a heat sink in a CT bulb connected to the apparatus, the apparatus comprising:
the first comparison unit is used for comparing the difference value between the heat capacity and the preheating value of the CT bulb tube with a first preset value after the CT bulb tube is switched from a scanning state to a non-scanning state;
and the control closing unit is used for controlling to close the radiator under the condition that the difference value is determined to be lower than a first preset value.
In a third aspect, there is provided an apparatus for controlling heat capacity, the apparatus comprising: the system comprises an internal bus, a memory, a processor and an external interface which are connected through the internal bus; wherein the content of the first and second substances,
the external interface is used for connecting the CT bulb tube;
the memory is used for storing machine readable instructions corresponding to control logic for controlling the heat capacity;
the processor is used for comparing the difference value between the heat capacity and the preheating value of the CT bulb tube with a first preset value after the CT bulb tube is switched from a scanning state to a non-scanning state;
and controlling to close the radiator under the condition that the difference is determined to be lower than a first preset value.
In a fourth aspect, a machine-readable storage medium is provided having stored thereon computer instructions that, when executed, perform the following:
when the CT bulb tube is switched from a scanning state to a non-scanning state, comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a first preset value;
and controlling to close the radiator under the condition that the difference is determined to be lower than a first preset value.
According to the embodiment of the application, after the CT bulb tube is switched from the scanning state to the non-scanning state, because the difference value between the heat capacity value and the preheating value of the CT bulb tube is lower than the first preset value, the radiator of the CT bulb tube is controlled to be closed, so that the descending speed of the heat capacity value of the CT bulb tube is slowed, the time for the heat capacity value of the CT bulb tube to reach the preheating value from the first preset value is prolonged, the preheating frequency of the CT bulb tube is reduced, and the reduction of the service life of the CT bulb tube caused by frequent preheating of the CT bulb tube is avoided.
Drawings
Fig. 1 is a flowchart of a method for controlling a heat sink to be turned off based on heat capacity of a bulb according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a CT bulb with heat transfer between the CT bulb and the ambient environment according to an embodiment of the present disclosure;
FIG. 3 is a graph illustrating cooling of a bulb according to an embodiment of the present application;
fig. 4 is a flowchart of a method for controlling the radiator to be turned on based on the heat capacity of the bulb according to an embodiment of the present application;
FIG. 5 is a block diagram of an embodiment of an apparatus for controlling thermal capacity according to the present disclosure;
fig. 6 is a schematic diagram of an embodiment of an apparatus for controlling heat capacity according to the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
A CT tube is a device that generates X-rays in a CT system and scans a subject (patient). The CT bulb tube comprises a tube core and a tube shell, wherein the tube core mainly comprises a cathode and an anode target, the cathode is used for generating electron beams, and the anode target receives electrons and generates X rays. However, most of the electrons are not converted into X-rays, but into thermal energy, and thus the die generates a large amount of thermal energy. The pipe shell mainly comprises cooling oil and a radiator, and the radiator is mainly used for volatilizing heat energy absorbed by the cooling oil so as to achieve the purpose of reducing the temperature of the pipe core.
In the CT system, the working state of the CT bulb is controlled by a corresponding control device, which may be a dedicated control device or a multi-purpose control device. For example, the control device may be a dedicated control device for a certain function of the CT bulb, or may be a multi-purpose control device (e.g., a computer loaded with various control programs) capable of controlling various functions of the CT bulb.
In the prior art, when the CT bulb is not scanned for a long time, the CT bulb is in a cold state. And when the heat capacity value of the CT bulb is lower than a set value, the CT bulb is considered to be in a cold state, otherwise, the CT bulb is considered to be in a hot state. The heat capacity value of the CT bulb refers to the amount of heat stored in the CT bulb, and is usually expressed in percentage.
When the CT bulb tube is used for scanning, the control device can control the anode target of the CT bulb tube to load high power, so that the CT bulb tube generates a large amount of X rays, and the detected object is scanned. Because the tube core can also generate a large amount of heat energy while the CT bulb tube generates X-rays, if the CT bulb tube is in a cold state and the control device directly loads high power on the anode target of the CT bulb tube, the anode target can be damaged due to expansion with heat and contraction with cold.
Therefore, in the prior art, the scanning of CT bulbs is defined. When the heat capacity value of the CT bulb is lower than the preheating value (namely the CT bulb is in a cold state) and scanning is required, preheating scanning is required to be carried out on the CT bulb firstly. The preheating scanning is that the control equipment controls the power loaded on the anode target to start from low power and gradually increase the power based on a preheating program, so that the bulb tube starts to be exposed from the low power, then the exposure power is gradually increased, the running time of the preheating scanning is generally 2-5 minutes, all parts of the bulb tube can reach ideal working temperature (namely, the working temperature is greater than or equal to a preheating value) through the preheating scanning, and then the detected object is scanned.
However, in hospitals with fewer patients, sometimes because the time interval between patients needing scanning is longer, when the next patient is ready for scanning, the heat capacity value of the bulb is lower than the preheating value, and the scanning can be performed after preheating. On the one hand, this results in the patient waiting for the CT bulb to finish preheating before scanning, and if the patient is on the scanning bed at this time, the patient has to leave the scanning room, and in addition, the emergency patient cannot delay the time, so that it is a big problem for the emergency patient. On the other hand, frequent preheating of the CT bulb leads to a reduction in service life.
To solve the problems in the prior art, please refer to fig. 1, in which fig. 1 is a flowchart of a method for controlling a heat sink to be turned off based on heat capacity of a bulb according to an embodiment of the present application, and the embodiment may include the following steps:
step 101: when the CT bulb tube is switched from a scanning state to a non-scanning state, comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a first preset value;
before describing the technical method proposed in the present application in detail, the heat transfer mode and several thermal concepts and formulas in the CT bulb are introduced.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating heat transfer between the inside of a CT bulb and the surrounding environment according to an embodiment of the present disclosure.
In thermal, heat transfer is divided into radiative heat transfer, thermal conduction, and convective heat transfer. Wherein, the radiation heat transfer is to transfer heat through electromagnetic waves without heat transfer media (namely, vacuum environment); thermal conduction relies on the movement and/or vibration of molecules, atoms or electrons of a substance to transfer heat, requiring a heat transfer medium; convective heat transfer relies on the macroscopic motion of fluid micelles to transfer heat, requiring a heat transfer medium, and existing only in the fluid.
As shown in fig. 2, the internal anode and the external anode of the CT bulb, the external anode and the anode rotor, the anode rotor and the auxiliary component, and the auxiliary component and the surrounding environment of the CT bulb can all perform heat transfer in a heat conduction manner, and in addition, the internal anode and the auxiliary component, the external anode and the auxiliary component, the anode rotor and the auxiliary component, and the auxiliary component and the surrounding environment of the CT bulb can all perform heat transfer in a radiation heat transfer manner. The auxiliary components comprise a core outer sleeve of the CT bulb tube, a tube shell, cooling oil in the tube shell and a radiator.
In thermal, the temperature of any substance changes with the absorbed or emitted heat, and the relationship is:
Tx＝Tx+t*dQx/Cx；
in the above variation, TxIs the temperature of the substance X, t is the heat capacity calculation cycle time, dQxThe calorific value, C, of the change of the substance X per unit timexIs the specific heat capacity.
From the variation relation, it can be derived:
T2＝T2+t*dQ2/C2；
T3＝T3+t*dQ3/C3；
T5＝T5+t*dQ5/C5；
wherein, the above-mentioned T2The temperature of the internal anode shown in FIG. 2, T above3Is the temperature of the external anode shown in FIG. 2, T above5Is the temperature of the auxiliary component shown in fig. 2.
In thermal, heat transfer occurs between substances having a temperature difference. In unit time, the calculation formula of the heat transferred between the substances with the temperature difference in a radiation heat transfer mode is as follows:
Jxy＝S*Axy(Tx-Ty)^4；
wherein, JxyThe heat transferred between the substance X and the substance Y in a radiation heat transfer mode in unit time;
s is a Maxwell constant;
Axyis the emissivity;
Tx、Tytemperatures of substance X and substance Y, respectively.
According to the above formula Jxy＝S*Axy(Tx-Ty) 4, knowing that:
J25＝S*A25(T2-T5)^4；
J35＝S*A35(T3-T5)^4；
J45＝S*A45(T4-T5)^4；
J56＝S*A56(T5-T6)^4；
wherein, the above J25The heat transferred between the internal anode and the auxiliary member by radiation heat transfer in FIG. 2, item J above35The heat transferred between the external anode and the auxiliary member by radiation heat transfer in FIG. 2, the above J45Heat transferred between the anode rotor and the auxiliary member by radiation heat transfer in fig. 2, said J56The heat transferred between the auxiliary components and the surrounding environment of the CT bulb tube in fig. 2 is by radiation heat transfer.
In unit time, the calculation formula of the heat transferred between the substances with the temperature difference in a heat conduction mode is as follows:
Kxy＝Lxy*(Tx-Ty)；
wherein, KxyThe heat is transferred between the substance X and the substance Y in a heat conduction mode in unit time;
Lxyis the coefficient of thermal conductivity;
Tx、Tytemperatures of substance X and substance Y, respectively.
According to the above formula Kxy＝Lxy*(Tx-Ty) Therefore, the following steps are carried out:
K23＝L23*(T2-T3)；
K34＝L34*(T3-T4)；
K56＝L56*(T5-T6)；
wherein, K is23The heat transferred between the inner anode and the outer anode in the heat transfer manner in FIG. 2, K34The heat transferred between the external anode and the anode rotor in the manner of heat transfer in FIG. 2, K56The heat transferred between the auxiliary components and the surrounding environment of the CT bulb in fig. 2 is transferred by heat transfer.
In addition, according to the schematic diagram of heat transfer between the inside of the CT bulb and the surrounding environment shown in fig. 2, it can be obtained that:
dQ2＝N2-K23-S25；
dQ3＝N3+K23-K34-S35；
dQ5＝N5+S25+S35+S45+K45-S56-K56；
wherein N is2，N3，N5Respectively loading power on an inner anode and an outer anode of the CT bulb tube and an auxiliary component of the CT bulb tube;
dQ2，dQ3，dQ5the energy change amounts of the inner anode, the outer anode and the auxiliary component of the CT bulb tube in unit time are respectively.
The technical method proposed in the present application is specifically described below.
In the embodiment of the present application, the control device may calculate the thermal capacity of the CT bulb in real time, and the calculation formula is:
Hct＝C2*(T2-T6)+C3*(T3-T6)
wherein, due to T2And T3Can change with the working state of the CT bulb tubeAnd therefore, the heat capacity value of the CT bulb will also change.
In this embodiment, the control device may monitor the operating state of the CT bulb in real time. Wherein, the working state of the CT bulb tube can be divided into the following three conditions:
1) the CT bulb tube is in a scanning state, and the radiator is in an open state;
2) the CT bulb tube is in a non-scanning state, and the radiator is in an opening state;
3) the CT bulb tube is in a non-scanning state, and the radiator is in a closed state.
The control device is a device for controlling the thermal capacity, and the device may be a dedicated device for controlling the thermal capacity, or may be a multi-purpose device (such as a computer) having a function of controlling the thermal capacity.
In the embodiment of the application, the control device can monitor the temperature of each component of the CT bulb tube and the temperature of the surrounding environment in real time. When the control device detects that the CT bulb tube is switched from the scanning state to the non-scanning state, the heat value of the CT bulb tube can be calculated in real time based on the heat capacity calculation formula, and whether the difference value between the heat capacity value and the preheating value of the CT bulb tube is lower than a first preset value or not is judged. The size of the first preset value can be adjusted according to the needs of a user, and is not limited in the application.
Step 102: and controlling to close the radiator under the condition that the difference is determined to be lower than a first preset value.
After the CT bulb tube is switched from the scanning state to the non-scanning state, the cathode of the CT bulb tube does not emit electron beams, and the tube core of the CT bulb tube does not generate X rays and heat energy, so that the heat capacity value of the CT bulb tube is reduced along with time under the action of the radiator.
In this step, when the control device determines that the difference between the heat capacity value and the preheating value of the CT bulb is lower than the first preset value, the control device may control to turn off the radiator in the CT bulb. At this point, the CT bulb will enter the operating state shown in case 3) above.
In the prior art, when the CT bulb is in an open state, the radiator is always in an open state. The CT bulb is in an on state, which means that the power supply of the CT bulb is powered on (i.e., the CT bulb is in a power-on state). The CT bulb tube is in an open state, which does not represent that the CT bulb tube is in a scanning state, and the scanning of the CT bulb tube is controlled by the control equipment.
In specific operation, a control switch can be added between the heat sink and the power supply. When the control device determines that the difference value between the heat value and the preheating value of the CT bulb is lower than the first preset value, the control device can control the CT bulb to switch off the control switch, so that the radiator is closed.
In this step, since the heat radiator of the CT bulb is turned off when the difference between the heat capacity value and the preheating value of the CT bulb is lower than the first preset value, the heat conduction coefficient L between the auxiliary components of the CT bulb and the surrounding environment is reduced56And decreases. According to the formula in this step, L56Become smaller → K56Get smaller → dQ5With a gradual change (i.e., a gradual rate of heat drop of the auxiliary member) → T5The descending speed of (S) becomes gentle → S25And S35Change of (d) becomes gentle → dQ2And dQ3Becomes gentle (i.e., the heat falling speed of the internal anode and the external anode becomes gentle) → T2And T3The descending speed of Hct → the descending speed of Hct becomes slow. Therefore, the heat sink can be turned off to slow down the decrease of the heat capacity value of the CT bulb.
For example, referring to fig. 3, fig. 3 is a graph illustrating a cooling curve of a bulb according to an embodiment of the present application.
Where the solid curve represents the heat capacity dissipation curve without heat sink control and the dashed curve represents the heat capacity dissipation curve with the heat sink power turned off starting at 20% heat capacity. Assuming that the heat capacity of the preheating limit value is 6% and the threshold value of the bulb radiator power switch is 20%, when the radiator power control is not performed, the heat capacity of the bulb is reduced from 20% to 6% for about 1.65 hours, and when the radiator power control is performed, the heat capacity of the bulb is reduced from 20% to 6% for about 4.6 hours, and it can be seen that the reduction time of the heat capacity can be greatly delayed by controlling the bulb radiator power.
Therefore, in the case that the interval time of the patient needing to be scanned is relatively long, the technical method of the embodiment of the application can reduce the preheating frequency of the CT bulb.
Referring to fig. 4, fig. 4 is a flowchart of a method for controlling to turn on a heat sink based on heat capacity of a bulb according to an embodiment of the present application, specifically executing the following steps:
step 401: after the CT bulb tube is in a non-scanning state and receives a scanning start trigger, judging whether the heat capacity value of the CT bulb tube is lower than a preset preheating value or not;
in the embodiment of the application, when the CT bulb is in the non-scanning state and the control device receives the scanning start trigger, the control device may determine whether the heat capacity value of the CT bulb is lower than a preset calorific value. When the heat capacity value of the CT bulb is determined to be lower than the preset preheating value, the control device can perform preheating scanning on the CT bulb based on the preheating program, and control the CT bulb to be switched from the non-scanning state to the scanning state after the heat capacity value of the CT bulb reaches the preheating value. If the heat capacity value of the CT bulb is not lower than the calorific value, the control equipment directly controls the CT bulb to be switched from the non-scanning state to the scanning state.
Wherein, the heat capacity value of the CT bulb tube will gradually increase as the CT bulb tube is switched from the non-scanning state to the scanning state. Because the CT bulb tube is damaged due to overhigh temperature, when the CT bulb tube is in a scanning state, the radiator needs to be started to radiate the CT bulb tube.
Step 402: when the CT bulb tube is switched from a non-scanning state to a scanning state, comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a second preset value;
in the embodiment of the application, after the CT bulb is switched from the non-scanning state to the scanning state, the control device may determine whether a difference between a heat capacity value and a preheating value of the CT bulb is higher than a second preset value. The size of the second preset value can be adjusted according to the user requirement, and is not limited in the application. Since the first preset value is also set in the embodiment of the present application, in actual work, for convenience, the first preset value and the second preset value are generally set to be the same size.
Step 403: and controlling to open the radiator under the condition that the difference value is higher than a second preset value. And when the control equipment determines that the heat capacity value of the CT bulb is higher than the second preset value, the control equipment can control the radiator of the CT bulb to be started.
In specific operation, a control switch can be added between the heat sink and the power supply. And when the control equipment determines that the difference value between the heat value and the preheating value of the CT bulb is higher than a second preset value, the CT bulb can be controlled to close the control switch, so that the radiator is opened.
It can be seen from the above embodiments that, after the CT bulb is switched from the scanning state to the non-scanning state, because the difference between the heat capacity value and the preheating value of the CT bulb is lower than the first preset value, the heat radiator of the CT bulb is controlled to be turned off, so that the decreasing speed of the heat capacity value of the CT bulb is slowed, the time for the heat capacity value of the CT bulb to reach the preheating value from the first preset value is prolonged, the preheating frequency of the CT bulb is reduced, and the reduction of the service life of the CT bulb caused by frequent preheating of the CT bulb is avoided.
The descriptions of the steps in fig. 1 and fig. 3 above may be implemented in software, hardware or a combination thereof, for example, those skilled in the art may implement them in the form of software code, and may implement computer executable instructions capable of implementing the logical functions corresponding to the steps. When implemented in software, the executable instructions may be stored in a memory and executed by a processor in the device.
Corresponding to the embodiments of the method for controlling the heat capacity, the application also provides embodiments of a device for controlling the heat capacity and an apparatus for controlling the heat capacity.
Referring to fig. 5, fig. 5 is a block diagram of an embodiment of an apparatus for controlling a heat capacity according to the present application, which may include: a first comparison unit 510 and a control closing unit 520.
The first comparing unit 510 is configured to compare a difference between a heat capacity value and a preheating value of the CT bulb with a first preset value after the CT bulb is switched from a scanning state to a non-scanning state;
a control closing unit 520, configured to control to close the radiator if it is determined that the difference is lower than a first preset value.
In this embodiment, the apparatus may further include a determining unit, a preheating switching unit, a second comparing unit, a control starting unit, and a calculating unit (not shown in fig. 5):
the device comprises a judging unit, a control unit and a control unit, wherein the judging unit is used for judging whether the heat capacity value of the CT bulb tube is lower than a preset preheating value or not after the CT bulb tube is in a non-scanning state and receives a scanning starting trigger;
the preheating switching unit is used for preheating and scanning the CT bulb tube based on a preset preheating program if the CT bulb tube is in the scanning state, and controlling the CT bulb tube to be switched from the non-scanning state to the scanning state after the heat capacity value of the CT bulb tube reaches the preheating value;
the switching unit is used for directly controlling the CT bulb tube to be switched from the non-scanning state to the scanning state if the CT bulb tube is not in the scanning state;
the second comparison unit is used for comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a second preset value after the CT bulb tube is switched from the non-scanning state to the scanning state;
the control starting unit is used for controlling the radiator to be started under the condition that the difference value is higher than a second preset value;
the calculating unit is used for calculating the heat capacity of the CT bulb tube in real time based on a heat capacity calculating formula; wherein the heat capacity calculation formula is:
Hct＝C2*(T2-T6)+C3*(T3-T6)
wherein the content of the first and second substances,
hct is the heat capacity of the CT bulb tube;
C2，C3the specific heat capacities of the internal anode and the external anode of the CT bulb tube are respectively constant；
T2，T3，T6The temperatures of the inner anode and the outer anode of the CT bulb tube and the ambient environment of the CT bulb tube are respectively.
Referring to fig. 6, fig. 6 is a schematic diagram of an embodiment of an apparatus for controlling heat capacity according to the present application, which may include: a memory 620, a processor 630, and an external interface 640 connected by an internal bus 610.
The external interface 640 is used for connecting a CT bulb tube;
the memory 620 is used for storing machine readable instructions corresponding to control logic for controlling the heat capacity;
the processor 630 is configured to compare a difference between a heat capacity value and a preheating value of the CT bulb with a first preset value after the CT bulb is switched from a scanning state to a non-scanning state;
and controlling to close the radiator under the condition that the difference is determined to be lower than a first preset value.
Furthermore, the flow shown in the embodiment of the present application for controlling the thermal capacity may also be included in a computer-readable storage medium, where the storage medium may be connected to a processing device for executing instructions, and the storage medium stores thereon machine-readable instructions corresponding to control logic for controlling the thermal capacity, where the instructions are executable by the processing device, and the machine-readable instructions are used to implement the following operations:
when the CT bulb tube is switched from a scanning state to a non-scanning state, comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a first preset value;
and controlling to close the radiator under the condition that the difference is determined to be lower than a first preset value.
In the embodiments of the present application, the computer readable storage medium may be in various forms, such as, in different examples: RAM (random Access Memory), volatile Memory, non-volatile Memory, flash Memory, a storage drive (e.g., a hard drive), a solid state drive, any type of storage disk (e.g., an optical disk, a dvd, etc.), or similar storage medium, or a combination thereof. In particular, the computer readable medium may be paper or another suitable medium upon which the program is printed. Using these media, the programs can be electronically captured (e.g., optically scanned), compiled, interpreted, and processed in a suitable manner, and then stored in a computer medium.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (10)
1. A method of controlling heat capacity, the method for controlling a heat sink in a CT bulb, the method comprising:
when the CT bulb tube is switched from a scanning state to a non-scanning state, comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a first preset value;
and controlling to close the radiator under the condition that the difference is determined to be lower than a first preset value.
2. The method of claim 1, further comprising:
after the CT bulb tube is in a non-scanning state and receives a scanning start trigger, judging whether the heat capacity value of the CT bulb tube is lower than a preset preheating value or not;
if so, preheating and scanning the CT bulb tube based on a preset preheating program, and controlling the CT bulb tube to be switched from a non-scanning state to a scanning state after the heat capacity value of the CT bulb tube reaches the preheating value;
if not, directly controlling the CT bulb tube to be switched from the non-scanning state to the scanning state.
3. The method of claim 1, further comprising:
when the CT bulb tube is switched from a non-scanning state to a scanning state, comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a second preset value;
and controlling to open the radiator under the condition that the difference value is higher than a second preset value.
4. The method of claim 3, wherein the first predetermined value is equal to the second predetermined value.
5. An apparatus for controlling heat capacity, the apparatus being used for controlling the opening and closing of a heat sink in a CT bulb, the apparatus comprising:
the first comparison unit is used for comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a first preset value after the CT bulb tube is switched from a scanning state to a non-scanning state;
and the control closing unit is used for controlling to close the radiator under the condition that the difference value is determined to be lower than a first preset value.
6. The apparatus of claim 5, further comprising:
the judging unit is used for judging whether the heat capacity value of the CT bulb tube is lower than a preset preheating value or not after the CT bulb tube is in a non-scanning state and receives a scanning starting trigger;
the scanning state switching unit is used for carrying out preheating scanning on the CT bulb tube based on a preset preheating program under the condition that the judgment result of the judgment unit is negative, and controlling the CT bulb tube to be switched from a non-scanning state to a scanning state after the heat capacity value of the CT bulb tube reaches the preheating value; and under the condition that the judgment result of the judgment unit is yes, directly controlling the CT bulb tube to be switched from the non-scanning state to the scanning state.
7. The apparatus of claim 5, further comprising:
the second comparison unit is used for comparing the difference value between the heat capacity value and the preheating value of the CT bulb tube with a second preset value after the CT bulb tube is switched from the non-scanning state to the scanning state;
and the control opening unit is used for controlling the radiator to be opened under the condition that the difference value is higher than a second preset value.
8. The apparatus of claim 7, wherein the first preset value is equal to the second preset value.
9. An apparatus for controlling thermal capacity, the apparatus comprising: the system comprises an internal bus, a memory, a processor and an external interface which are connected through the internal bus; wherein the content of the first and second substances,
the external interface is used for connecting a CT bulb tube;
the memory is used for storing machine readable instructions corresponding to control logic for controlling the heat capacity;
the processor is used for comparing the heat capacity value of the CT bulb tube with a first preset value after the CT bulb tube is switched from a scanning state to a non-scanning state;
and under the condition that the heat capacity value of the CT bulb is determined to be lower than a first preset value, controlling to close the radiator in the CT bulb.
10. A machine-readable storage medium having stored thereon computer instructions that, when executed, perform the following:
when the CT bulb tube is switched from a scanning state to a non-scanning state, comparing the heat capacity value of the CT bulb tube with a first preset value;
and under the condition that the heat capacity value of the CT bulb is determined to be lower than a first preset value, controlling to close the radiator in the CT bulb.
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| CN110192887B (en) * | 2019-05-31 | 2023-06-02 | 上海联影医疗科技股份有限公司 | CT equipment scanning environment determining method, device, equipment and medium |
| US11096642B2 (en) * | 2019-08-16 | 2021-08-24 | GE Precision Healthcare LLC | Methods and systems for X-ray tube conditioning |
| CN113343459B (en) * | 2021-06-02 | 2023-04-25 | 康达洲际医疗器械有限公司 | Assessment method and device for heat capacity state of bulb tube and electronic equipment |
| CN114596951A (en) * | 2022-03-11 | 2022-06-07 | 上海联影医疗科技股份有限公司 | Thermal capacity prediction method and system for medical imaging equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103654822A (en) * | 2012-09-25 | 2014-03-26 | 上海西门子医疗器械有限公司 | Thermal capacity indication method and device of bulb tube and X-ray imaging device |
| CN105105782A (en) * | 2015-09-30 | 2015-12-02 | 上海联影医疗科技有限公司 | CT system and imaging method |
| CN105125235A (en) * | 2015-09-30 | 2015-12-09 | 沈阳东软医疗***有限公司 | Bulb tube preheating method and device |
| CN105232077A (en) * | 2015-09-30 | 2016-01-13 | 上海联影医疗科技有限公司 | Scanning control system and computed tomography system |
| CN106137229A (en) * | 2015-03-30 | 2016-11-23 | 上海西门子医疗器械有限公司 | A kind of method of Overheating Treatment, device and X-ray equipment |
| CN106618621A (en) * | 2017-01-03 | 2017-05-10 | 沈阳东软医疗***有限公司 | Control method and device for preheating-free scanning of bulb tube and medical equipment |
| CN106725586A (en) * | 2017-01-06 | 2017-05-31 | 深圳市安健科技股份有限公司 | A kind of guard method of bulb and device |
| CN106805988A (en) * | 2017-01-04 | 2017-06-09 | 沈阳东软医疗***有限公司 | A kind of automatic preheating method and apparatus of CT scan system |
| CN107371313A (en) * | 2016-05-11 | 2017-11-21 | 上海西门子医疗器械有限公司 | For heating the system and x-ray imaging equipment of X-ray tube |
-
2018
- 2018-04-28 CN CN201810404937.3A patent/CN108652655B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103654822A (en) * | 2012-09-25 | 2014-03-26 | 上海西门子医疗器械有限公司 | Thermal capacity indication method and device of bulb tube and X-ray imaging device |
| CN106137229A (en) * | 2015-03-30 | 2016-11-23 | 上海西门子医疗器械有限公司 | A kind of method of Overheating Treatment, device and X-ray equipment |
| CN105105782A (en) * | 2015-09-30 | 2015-12-02 | 上海联影医疗科技有限公司 | CT system and imaging method |
| CN105125235A (en) * | 2015-09-30 | 2015-12-09 | 沈阳东软医疗***有限公司 | Bulb tube preheating method and device |
| CN105232077A (en) * | 2015-09-30 | 2016-01-13 | 上海联影医疗科技有限公司 | Scanning control system and computed tomography system |
| CN107371313A (en) * | 2016-05-11 | 2017-11-21 | 上海西门子医疗器械有限公司 | For heating the system and x-ray imaging equipment of X-ray tube |
| CN106618621A (en) * | 2017-01-03 | 2017-05-10 | 沈阳东软医疗***有限公司 | Control method and device for preheating-free scanning of bulb tube and medical equipment |
| CN106805988A (en) * | 2017-01-04 | 2017-06-09 | 沈阳东软医疗***有限公司 | A kind of automatic preheating method and apparatus of CT scan system |
| CN106725586A (en) * | 2017-01-06 | 2017-05-31 | 深圳市安健科技股份有限公司 | A kind of guard method of bulb and device |
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Address after: 110167 No. 177-1 Innovation Road, Hunnan District, Shenyang City, Liaoning Province Applicant after: DongSoft Medical System Co., Ltd. Address before: 110167 No. 177-1 Innovation Road, Hunnan District, Shenyang City, Liaoning Province Applicant before: Dongruan Medical Systems Co., Ltd., Shenyang |
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