CN107994563B - Power supply time sequence control circuit, magnetic resonance imaging system and power supply time sequence control method - Google Patents
Power supply time sequence control circuit, magnetic resonance imaging system and power supply time sequence control method Download PDFInfo
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- 229910052734 helium Inorganic materials 0.000 claims description 28
- 238000012544 monitoring process Methods 0.000 claims description 28
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- 229910052760 oxygen Inorganic materials 0.000 claims description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 27
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 27
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- 238000001816 cooling Methods 0.000 description 3
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- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
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Abstract
The invention discloses a power supply time sequence control circuit, which is used for connecting a network power supply and each device needing power supply in a magnetic resonance imaging system. According to the technical scheme of the one-key automatic starting and closing operation of the multiple devices, the relay-contact control technology is adopted, so that the starting sequence and delay time requirements among the devices can be met, the device is prevented from being impacted, damaged or incapable of working normally, and the starting time and the shutdown time of an operator can be saved; simple, low cost and high reliability.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a power supply time sequence control circuit, a magnetic resonance imaging system with the power supply time sequence control circuit and a power supply time sequence control method of the magnetic resonance imaging system.
Background
Magnetic resonance imaging, also known as nuclear magnetic resonance imaging, is an advanced modern medical imaging technology that has been developed with the development of cryotechnology, superconducting technology, magnet technology, electronic technology, and computer technology, and has been widely used in large and medium hospitals.
The magnetic resonance imaging is to place the human body in a special magnetic field, excite the hydrogen nuclei in the human body by radio frequency pulse to cause the hydrogen nuclei to resonate and absorb energy, and after the radio frequency pulse is stopped, the hydrogen nuclei emit radio signals according to a specific frequency and release the absorbed energy to be recorded by receiving equipment outside the human body, and then the images are obtained by computer processing.
The magnetic resonance imaging system consists of a main magnet, a gradient power amplifier, a radio frequency power amplifier, a spectrometer device, a gradient coil, a transmitting coil, a receiving coil, a computer and other auxiliary equipment. The auxiliary equipment mainly comprises an examining table, a positioning ventilation device, a physiological monitoring device, a communication device, a video monitoring device, a helium cooling device, a water cooling device, an image transmission storage device, a film processing device and the like. In addition, safety monitoring facilities and emergency stops, such as metal detectors, oxygen monitors and emergency exhausts, magnet emergency stops, and emergency power outages, are needed.
The main magnet is a key device of a magnetic resonance imaging system, mainly used to generate a main magnetic field. The higher the main magnetic field strength, the higher the signal-to-noise ratio of the image. The main magnets can be divided into four types, namely a permanent magnet type, a normal conducting type, a mixed type and a superconducting type, wherein the superconducting main magnet can generate a higher main magnetic field, and the uniformity and the stability of the magnetic field are better than those of other types of main magnets.
The gradient power amplifier is used for driving gradient coils in three directions, providing a gradient magnetic field for the system, and superposing the gradient magnetic field on a main magnetic field to perform spatial coding on resonance signals so as to realize spatial positioning of imaging voxels.
And the radio frequency power amplifier outputs radio frequency pulses meeting requirements to drive the radio frequency coil, and a generated radio frequency field is vertical to the main magnetic field, so that hydrogen protons in the imaging voxels absorb electromagnetic waves with the same frequency as the main magnetic field to generate a magnetic resonance phenomenon.
The spectrometer device outputs different signals to the gradient power amplifier and the radio frequency power amplifier according to the imaging sequence requirement of the magnetic resonance imaging system, so that the two power amplifiers output high-power gradient pulses and radio frequency pulses to generate a magnetic resonance phenomenon. After the radio frequency pulse is cancelled, echo resonance signals carrying space codes are induced in the receiving coil, and the signals are amplified by the preamplifier and then input to the spectrometer device.
And the computer is used for managing the patient information, managing images, processing images, scanning and scanning control, maintaining a system, managing a network and the like through hardware and software.
The examination bed carries a patient to the magnet cavity, and the positioning device positions the part of the patient to be scanned.
The physiological monitoring device needs physiological monitoring because physiological motion such as heartbeat and respiratory motion causes motion artifacts in magnetic resonance images.
The communication device is used for communicating and communicating a doctor in the operation room with a patient in the scanning room; video monitoring means for a doctor in the operating room to observe the patient's dynamics in the scanning room.
The oxygen monitor and the emergency exhauster are installed in the scanning chamber, and when a large amount of helium gas is generated after the magnetic refrigerant volatilizes, so that the oxygen concentration in the scanning chamber is reduced to the minimum concentration (not less than 18%) required by a human body, the oxygen monitor can give an audible and visual alarm and can automatically start the emergency exhauster to exhaust, thereby ensuring the safety of a patient.
The magnet emergency stop device is generally arranged on a wall and an operating platform near the superconducting magnet, and can rapidly reduce the magnetic field to zero in an emergency so as to ensure that the superconducting magnet or human life is prevented from being threatened by the magnetic field.
Emergency power cut devices, typically mounted on an operator's station, are of a safe, extremely low voltage to quickly shut off power when operator, patient or equipment safety is compromised.
When the main magnet is a superconducting magnet, the matched equipment also comprises a helium compressor and a magnet monitoring unit. In order to reduce the evaporation of liquid helium in the superconducting magnet, the superconducting magnet is usually matched with a cold head and a helium compressor adopting a water cooling mode, so that the consumption of the liquid helium is reduced, and the operating cost of a hospital is reduced.
At present, operators of magnetic resonance imaging systems perform manual starting and closing operations on the devices respectively, the starting sequence among the devices has logic requirements, if the operators do not start the devices according to the required sequence, the devices are impacted, the devices are damaged or the devices cannot work normally, and meanwhile, the time of the operators is wasted.
Disclosure of Invention
In view of the above, the present invention provides a power supply timing control circuit, a magnetic resonance imaging system having the power supply timing control circuit, and a power supply timing control method thereof to solve the above technical problems.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
according to a first aspect of the embodiments of the present invention, a power supply timing control circuit is provided, which is used for connecting a grid power supply and each device to be powered in a magnetic resonance imaging system, and includes a first main power supply circuit, a second main power supply circuit, and a control loop, where the first main power supply circuit is used for connecting the grid power supply and the device to be powered all day long in the magnetic resonance imaging system, the first power supply circuit includes an ac contactor KM1, a first end of a main contact of an ac contactor KM1 is connected to the grid power supply through a circuit breaker unit, and a second end of the main contact of the ac contactor KM1 is a first output end; the second main power supply circuit comprises an alternating current contactor KM2, a first end of a main contact of an alternating current contactor KM2 is connected with a network power supply through a breaker unit, and a second end of the main contact of the alternating current contactor KM2 is a second output end; the control loop comprises a button switch SA1, a button switch SA2, an intermediate relay KA1 and a direct current converter DC, the input end of the direct current converter DC, the first end of a button switch SA1 and the first end of a contact of an intermediate relay KA1 are connected with a network power supply through a breaker unit, the second end of a button switch SA1 is connected with a coil of an alternating current contactor KM1, two ends of the button switch SA2 are respectively connected with the output end of the direct current converter DC and the first end of a coil of the intermediate relay KA1, the second end of the coil of the intermediate relay KA1 is used for being connected with an emergency power failure device of the magnetic resonance imaging system, the second end of the contact of the intermediate relay KA1 is connected with the first end of an auxiliary contact of an alternating current contactor KM1, and the second end of the auxiliary contact of the alternating current.
The power supply time sequence control circuit adopts two key switches, a relay and a contactor, and parts of the magnetic resonance imaging system which need power supply all day and parts which do not need power supply all day are respectively connected into different power supply loops to realize power supply time sequence control.
The power supply time sequence control circuit is further improved by comprising at least one time sequence power supply branch, wherein the time sequence power supply branch comprises an alternating current contactor, the alternating current contactor in the Nth time sequence power supply branch is marked as an Nth alternating current contactor, and N is an integer greater than or equal to 1; the first end of the main contact of the Nth alternating current contactor and the first end of the auxiliary contact are respectively connected with a network power supply through a circuit breaker unit, and the second end of the main contact of the Nth alternating current contactor is an N +2 th output end; when N is equal to 1, the coil of the main contact of the Nth alternating current contactor is connected with the second end of the auxiliary contact of the alternating current contactor KM2 in the first timing control power supply loop; and when N is larger than 1, the coil of the main contact of the Nth alternating current contactor is connected with the second end of the auxiliary contact of the alternating current contactor in the N-1 th time sequence power supply branch circuit.
In an embodiment of the power supply timing control circuit of the present invention, the number of the timing power supply branches is three. The arrangement of the plurality of time sequence power supply branches is to classify all parts which do not need to be supplied with power all day by day and access different time sequence power supply branches so as to realize multi-level time sequence power supply.
The power supply time sequence control circuit is further improved in that each time sequence power supply branch also comprises a time relay, the time relay in the Nth time sequence power supply branch is marked as the Nth time relay, and the first end of the contact of the Nth time relay is connected with the coil of the Nth alternating current contactor; when N is equal to 1, the coil of the Nth time relay is connected with the coil of the alternating current contactor KM2 in parallel, and the second end of the contact of the Nth time relay is connected with the second end of the auxiliary contact of the alternating current contactor KM 2; when N is larger than 1, the coil of the Nth time relay is connected with the coil of the N-1 th alternating current contactor in parallel, and the second end of the contact of the Nth time relay is connected with the second end of the auxiliary contact of the N-1 th alternating current contactor KM 2. The time relay is used for delaying time, and the influence of current impact on simultaneous starting and stopping of a plurality of devices is further reduced.
According to a second aspect of the embodiments of the present invention, a magnetic resonance imaging system is provided, which includes a main magnet, a bed and a positioning ventilation device, a helium compressor, a magnet monitoring unit, an oxygen monitor, a computer, a communicator, a video monitor, a gradient power amplifier, a radio frequency power amplifier, a spectrometer device, a physiological monitor, an electric control device of the bed, an emergency power cut device, and a magnet emergency stop device, and further includes the above-mentioned power supply timing control circuit connected to a network power supply, the power supply timing control circuit has a first output terminal and a second output terminal, the first output terminal of the power supply timing control circuit is connected to a component requiring power supply all day, the second output terminal of the power supply timing control circuit is connected to a component not requiring power supply all day, and the second terminal of the KA1 coil is connected to the emergency power cut device of the magnetic resonance imaging system.
Preferably, the parts requiring power all day comprise an oxygen monitor; or the parts needing all-day power supply comprise a helium compressor, a magnet monitoring unit and an oxygen monitor. The oxygen monitor is used for detecting the oxygen concentration in an operating room and needs to be powered all day long; when the main magnet is a superconducting magnet, the helium compressor and the magnet monitoring unit exist as additional equipment of the superconducting magnet, and power supply is needed all day long.
Preferably, the components without power supply all day long comprise a computer, a communicator, a video monitoring device, a gradient power amplifier, a radio frequency power amplifier, a spectrometer device, a physiological monitoring device and an examining table electric control device. These devices do not need to be powered all day long and can therefore be started up later.
The magnetic resonance imaging system is further improved in that when the power supply time sequence control circuit is provided with three time sequence power supply branches, namely a third output end, a fourth output end and a fifth output end, the second output end of the power supply time sequence control circuit is connected with a computer, a communication device and a video monitoring device, the third output end of the power supply time sequence control circuit is connected with a gradient power amplifier, the fourth output end of the power supply time sequence control circuit is connected with a radio frequency power amplifier, and the fifth output end of the power supply time sequence control circuit is connected with a spectrometer device, a physiological monitoring device and an examination bed electric control device. The devices are divided into three types according to requirements, and control is realized according to time sequence.
According to a third aspect of the embodiments of the present invention, there is provided a timing control method of a magnetic resonance imaging system, including the steps of:
the starting part needs all-day power supply: when the button switch SA1 is pressed, the first power supply main circuit is conducted and needs to be started by the all-day power supply part;
no all-day power supply part is needed for starting: pressing a button switch SA2 to detect whether the emergency power failure device works normally, if so, conducting a second power supply main circuit under the condition that a first power supply main circuit is conducted, and not needing to start a full-day power supply part;
the shutdown does not require all-day power supply components: in the state that the power supply part does not need all days to work, the SA2 button is pressed, and the power supply part does not need all days to be powered down;
shut down all components: in the state that all components work or only the components needing power supply all day work, the button switch SA1 is pressed, and the working components are powered down.
Preferably, the parts requiring power all day comprise an oxygen monitor; or the parts needing all-day power supply comprise a helium compressor, a magnet monitoring unit and an oxygen monitor.
Preferably, the components without power supply all day long comprise a computer, a communicator, a video monitoring device, a gradient power amplifier, a radio frequency power amplifier, a spectrometer device, a physiological monitoring device and an examining table electric control device.
The further improvement of the time sequence control method of the magnetic resonance imaging system of the invention is that when the power supply time sequence control circuit has a first time sequence power supply branch, a second time sequence power supply branch and a third time sequence power supply branch, namely has a third output end, a fourth output end and a fifth output end, the steps start other parts as follows:
starting the computer, the communication device and the video monitoring device: the first time sequence power supply branch is conducted, the computer, the communication device and the video monitoring device are powered on, and the computer automatically starts and loads software;
starting up the gradient power amplifier: the first time sequence power supply branch is conducted, and the gradient power amplifier is powered on;
starting a radio frequency power amplifier: the second time sequence power supply branch is conducted, and the radio frequency power amplifier is powered on;
starting the spectrometer device, the physiological monitoring device and the examining bed electric control device: and the third time sequence power supply branch is conducted, and the spectrometer device, the physiological monitoring device and the examining table electric control device are electrified.
Preferably, when the gradient power amplifier is started, the first timing supply branch is turned on and set to be turned on with a delay.
Preferably, when the radio frequency power amplifier is started, the second timing power supply branch is turned on and set to be turned on in a delayed manner.
Preferably, when the spectrometer device, the physiological monitoring device and the examination bed electric control device are started, the conduction of the third timing power supply branch is set to be delayed conduction.
Further preferably, the delay on time is set to 3 to 10 seconds. The delay on time is freely set, preferably 5 s.
Compared with the prior art, the technical scheme of the invention for automatically starting and closing the running operation of a plurality of devices by one key adopts a relay-contact control technology, thereby not only meeting the requirements of starting sequence and delay time among the devices, avoiding the device impact, damaging the devices or the devices not working normally, but also saving the starting and shutdown time of operators; simple, low cost and high reliability.
Drawings
FIG. 1 is a block diagram of a power supply timing circuit according to the present invention;
fig. 2 is a schematic diagram of an overall structure of the magnetic resonance imaging system of the present invention.
In the figure, 10-main magnet, 11-gradient coil, 12-radio frequency coil, 13-receiving coil, 14-examining table and positioning ventilation device, 20-helium compressor, 21-magnet monitoring unit, 22-gradient power amplifier, 23-radio frequency power amplifier, 24-spectrometer device, 25-physiological monitoring device, 26-examining table electric control device, 27-magnet emergency stop device, 30-network power supply, 31-power supply sequence control circuit, 40-oxygen monitor, 41-talking device, 42-video monitoring device, 43-emergency power cut device, 50-computer, 61-first power supply main circuit, 62-second power supply main circuit, 71-first time sequence power supply branch circuit, 72-second time sequence power supply branch circuit, 73-third timing supply branch.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification 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 will be understood that, although the terms first, second, etc. may be used herein to describe various structures, these structures should not be limited by these terms. These terms are only used to distinguish one type of structure from another. For example, a first output may also be referred to as a second output, and similarly, a second output may also be referred to as a first output, depending on the context, without departing from the scope of the present invention.
As shown in fig. 1, a power supply timing control circuit 31 for connecting a network power supply and each device to be powered in a magnetic resonance imaging system includes a first power supply main circuit 61, a second power supply main circuit 62 and a control loop.
Specifically, the first main power supply circuit 61 includes an ac contactor KM1, a first end of a main contact of the ac contactor KM1 is connected to the grid power supply 30 through a breaker unit, and a second end of the main contact of the ac contactor KM1 is a first output end. The first output terminal can be used for connecting devices requiring power supply all day long in a magnetic resonance imaging system, such as an oxygen monitor 40, and when the main magnet is a superconducting magnet, a helium compressor 20 and a magnet monitoring unit 21.
The second main power supply circuit comprises an alternating current contactor KM2, a first end of a main contact of the alternating current contactor KM2 is connected with a network power supply through a breaker unit, and a second end of the main contact of the alternating current contactor KM2 is a second output end. The second output may be used to connect devices in the magnetic resonance imaging system that do not require power throughout the day, such as devices other than the helium compressor 20, the magnet monitoring unit 21, and the oxygen monitor 40.
The control loop comprises a button switch SA1, a button switch SA2, an intermediate relay KA1 and a direct current converter DC, the input end of the direct current converter DC, the first end of a button switch SA1 and the first end of a contact of an intermediate relay KA1 are connected with a network power supply through a breaker unit, the second end of a button switch SA1 is connected with a coil of an alternating current contactor KM1, two ends of the button switch SA2 are respectively connected with the output end of the direct current converter DC and the first end of a coil of the intermediate relay KA1, the second end of the coil of the intermediate relay KA1 is used for being connected with an emergency power failure device of the magnetic resonance imaging system, the second end of the contact of the intermediate relay KA1 is connected with the first end of an auxiliary contact of an alternating current contactor KM1, and the second end of the auxiliary contact of the alternating current. The control loop is used for realizing power supply time sequence control of each power supply loop through two button switches.
In an optional embodiment of the present invention, the power supply timing control circuit further includes at least one timing power supply branch, where the timing power supply branch includes an ac contactor, an ac contactor in an nth timing power supply branch is denoted as an nth ac contactor, where N is an integer greater than or equal to 1; the first end of the main contact of the Nth alternating current contactor and the first end of the auxiliary contact are respectively connected with a network power supply through a circuit breaker unit, and the second end of the main contact of the Nth alternating current contactor is an N +2 th output end; when N is equal to 1, the coil of the main contact of the Nth alternating current contactor is connected with the second end of the auxiliary contact of the alternating current contactor KM2 in the first timing control power supply loop; and when N is larger than 1, the coil of the main contact of the Nth alternating current contactor is connected with the second end of the auxiliary contact of the alternating current contactor in the N-1 th time sequence power supply branch circuit.
Further, in an optional embodiment of the present invention, each time sequence power supply branch further includes a time relay, the time relay in the nth time sequence power supply branch is marked as an nth time relay, and a first end of a contact of the nth time relay is connected to a coil of the nth ac contactor; when N is equal to 1, the coil of the Nth time relay is connected with the coil of the alternating current contactor KM2 in parallel, and the second end of the contact of the Nth time relay is connected with the second end of the auxiliary contact of the alternating current contactor KM 2; when N is larger than 1, the coil of the Nth time relay is connected with the coil of the N-1 th alternating current contactor in parallel, and the second end of the contact of the Nth time relay is connected with the second end of the auxiliary contact of the N-1 th alternating current contactor KM 2.
As shown in fig. 1, the power supply timing control circuit includes a first timing power supply branch 71 and a corresponding first time relay KT1, a second timing power supply branch 72 and a corresponding second time relay KT2, a third timing power supply branch 73 and a corresponding third time relay KT 3.
The first timing power supply branch 71 comprises a first alternating current contactor KM3, the first end of a main contact of the first alternating current contactor KM3 and the first end of an auxiliary contact are respectively connected with the grid power supply 30 through a breaker unit, a coil of a first time relay is connected with a coil of an alternating current contactor KM2 in parallel, the first end of a contact of the first time relay KT1 is connected with the coil of the first alternating current contactor KM3, the second end of the contact of the first time relay KT1 is connected with the second end of the auxiliary contact of the alternating current contactor KM2, and the second end of the main contact of the first alternating current contactor KM3 is a third.
The second time sequence power supply branch 72 comprises a second alternating current contactor KM4, the first end of the main contact of the second alternating current contactor KM4 and the first end of the auxiliary contact are respectively connected with the grid power supply 30 through a breaker unit, the coil of the second time relay is connected with the coil of the first alternating current contactor KM3 in parallel, the first end of the contact of the second time relay KT2 is connected with the coil of the second alternating current contactor KM4, the second end of the contact of the second time relay KT2 is connected with the second end of the auxiliary contact of the alternating current contactor KM3, and the second end of the main contact of the second alternating current contactor KM4 is a fourth output end.
The third time sequence power supply branch 73 comprises a third alternating current contactor KM5, the first end of a main contact of the third alternating current contactor KM5 and the first end of an auxiliary contact are respectively connected with the grid power supply 30 through a breaker unit, a coil of a first time relay is connected with a coil of a second alternating current contactor KM4 in parallel, the first end of a contact of the third time relay KT3 is connected with a coil of the third alternating current contactor KM5, the second end of a contact of the third time relay KT3 is connected with the second end of the auxiliary contact of the alternating current contactor KM4, and the second end of the main contact of the third alternating current contactor KM5 is a third output end.
The circuit breaker unit can be a whole power main switch or circuit breakers respectively arranged on each power supply main circuit or branch circuit. As shown in fig. 1, a first end of a main contact of an ac contactor KM1 is connected to a grid power supply 30 through a breaker QF1, a first end of a main contact of an ac contactor KM2 is connected to the grid power supply 30 through a breaker QF2, a first end of a main contact of an ac contactor KM3 is connected to the grid power supply 30 through a breaker QF3, a first end of a main contact of an ac contactor KM4 is connected to the grid power supply 30 through a breaker QF4, a first end of a main contact of an ac contactor KM5 is connected to the grid power supply 30 through a breaker QF5, and an input end of a DC converter DC, a first end of a button switch SA1, a first end of a contact of an intermediate relay KA1, a first end of an auxiliary contact of an ac contactor KM2, a first end of an auxiliary contact of an ac contactor KM3, and a first end of an auxiliary contact of.
Of course, the number of the timing power supply branches can be selected and set according to the daily use requirement of the magnetic resonance system, and the number can be 0 or an integer larger than 0.
As shown in fig. 2, a magnetic resonance imaging system includes: an examination bed and positioning ventilation device 14; a main magnet 10, a gradient coil 11, a radio frequency coil 12, a receiving coil 13; a power supply timing control circuit 31 connected to the network power supply 30; a helium compressor 20, a magnet monitoring unit 21, an oxygen monitor 40, a computer 50, a communicator 41, a video monitoring device 42, a gradient power amplifier 22, a radio frequency power amplifier 23, a spectrometer device 24, a physiological monitoring device 25, an examination bed electric control device 26 and an emergency power failure device 43 which are respectively connected with a power supply sequence control circuit 31; magnet emergency stop 27.
The main magnet 10 may be a superconducting magnet, the helium compressor 20 and the magnet monitoring unit 21 are respectively connected to the main magnet 10, and the magnet emergency stop device 27 is connected to the magnet monitoring unit 21; the gradient power amplifier 22 is connected with the gradient coil 11; the radio frequency power amplifier 23 is connected with the radio frequency coil 12; the spectrometer device 24 is connected with the receiving coil 13, the gradient power amplifier 22, the radio frequency power amplifier 23, the physiological monitoring device 25, the examining table electric control device 26 and the computer 50; the couch electronic 26 is connected to the couch and positioning ventilator 14. The structure of the power supply timing control circuit 31 will not be described in detail herein.
These components of the magnetic resonance imaging system can be divided into parts requiring full-day power supply and parts not requiring full-day power supply according to power supply needs. The parts requiring all-day power supply may include a helium compressor 20, a magnet monitoring unit 21, and an oxygen monitor 40. The components that do not require all-day power may include a computer 50, a communicator 41, a video monitoring device 42, a gradient power amplifier 22, a radio frequency power amplifier 23, a spectrometer device 24, a physiological monitoring device 25, and a couch electronic control device 26. Of course, if the main magnet 10 is not a superconducting magnet, the components that need to be powered all day long do not include the helium compressor 20 and the magnet monitoring unit 21.
In an alternative embodiment of the present invention, when the power supply timing control circuit 31 has only a first output terminal and a second output terminal, the first output terminal is connected to the helium compressor 20, the magnet monitoring unit 21 and the oxygen monitor 40, the second output terminal of the power supply timing control circuit 31 is connected to the computer 50, the communicator 41, the video monitor 42, the gradient power amplifier 22, the radio frequency power amplifier 23, the spectrometer 24, the physiological monitor 25, the examination table electronic control device 26, and the second terminal of the coil of the intermediate relay KA1 is connected to the emergency power-off device 43.
Further, as shown in fig. 1, in a further alternative embodiment of the present invention, the power supply timing control circuit 31 has a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, and a fifth output terminal. The first output end of the power supply sequence control circuit 31 is connected with the helium compressor 20, the magnet monitoring unit 21 and the oxygen monitor 40, the second output end is connected with the computer 50, the communicator 41 and the video monitoring device 42, the third output end is connected with the gradient power amplifier 22, the fourth output end is connected with the radio frequency power amplifier 23, and the fifth output end is connected with the spectrometer device 24, the physiological monitoring device 25 and the examining table electric control device 26.
Of course, the above embodiments are merely exemplary, the present invention is not limited thereto, and the number of timing supply branches different from the above embodiments is also applicable to the present invention.
In another aspect of the embodiments of the present invention, a timing control method of a magnetic resonance imaging system is further provided, including the following steps:
the starting part needs all-day power supply: when the button switch SA1 is pressed, the first power supply main circuit is conducted and needs to be started by the all-day power supply part;
no all-day power supply part is needed for starting: pressing a button switch SA2 to detect whether the emergency power failure device works normally, if so, conducting a second power supply main circuit under the condition that a first power supply main circuit is conducted, and not needing to start a full-day power supply part;
the shutdown does not require all-day power supply components: in the state that the power supply part does not need all days to work, the SA2 button is pressed, and the power supply part does not need all days to be powered down;
shut down all components: in the state that all components work or only the components needing power supply all day work, the button switch SA1 is pressed, and the working components are powered down.
As previously mentioned, the all-day-needed components may include a helium compressor 20, a magnet monitoring unit 21, an oxygen monitor 40. The components that do not require all-day power may include a computer 50, a communicator 41, a video monitoring device 42, a gradient power amplifier 22, a radio frequency power amplifier 23, a spectrometer device 24, a physiological monitoring device 25, and a couch electronic control device 26.
Further, when the power supply timing control circuit 31 has a first timing power supply branch 71, a second timing power supply branch 72 and a third timing power supply branch 73, that is, a third output terminal, a fourth output terminal and a fifth output terminal, the steps are started without sequentially performing all-day power supply components:
the startup computer 50, the call device 41, and the video monitoring device 42: the first time sequence power supply branch is conducted, the computer 50, the communication device 41 and the video monitoring device 42 are powered on, and the computer automatically starts and loads software;
start-up gradient power amplifier 22: the first timing power supply branch is turned on, and the gradient power amplifier 22 is powered on;
starting the radio frequency power amplifier 23: the second time sequence power supply branch is conducted, and the radio frequency power amplifier 23 is powered on;
starting the spectrometer device 24, the physiological monitoring device 25 and the examining table electric control device 26: the third time sequence power supply branch is conducted, and the spectrometer device 24, the physiological monitoring device 25 and the examining table electric control device 26 are powered on.
When the gradient power amplifier 22, the radio frequency power amplifier 23, the spectrometer device 24, the physiological monitoring device 25 and the examination bed electric control device 26 are started, the delay conduction can be set through a time relay. Preferably, the delay on-time may be set to 3-10s, for example, to 5 s.
Specifically, when the operator presses the button switch SA1, he or she starts the helium compressor 20, the magnet monitoring unit 21 and the oxygen monitor 40. Without special circumstances, the helium compressor 20, the magnet monitoring unit 21, and the oxygen monitor 40 operate 24 hours a day and 365 days a year.
Then, after the operator presses the button switch SA2, if the power supply timing control circuit 31 detects that the emergency power failure device 43 is operating normally, the coil of the intermediate relay KA1 is triggered to conduct the contacts of the intermediate relay KA1, and if the power supply timing control circuit 31 detects that the helium compressor 20, the magnet monitoring unit 21, and the oxygen monitor 40 are powered on, the coil of the ac contactor KM2 is triggered to be powered on, the computer 50, the communicator 41, and the video monitoring device 42 are powered on and start operating normally, and the computer 50 is automatically started and loads software.
At the same time when the coil of the ac contactor KM2 is triggered to be energized, the auxiliary contact of the ac contactor KM2 is turned on and the coil of the time relay KT1 is triggered to be energized. The contact of the time relay KT1 is conducted after time delay, and a coil of the first alternating current contactor KM3 is triggered to be electrified, so that the main contact of the first alternating current contactor KM3 is conducted, and the gradient power amplifier 22 is electrified and can start to work normally. The delay on time of the time relay KT1 may be set to 5 s.
At the same time when the coil of the first ac contactor KM3 is triggered to be energized, the auxiliary contact of the ac contactor KM3 is turned on and the coil of the time relay KT2 is triggered to be energized. The contact of the time relay KT2 is conducted after time delay, and a coil of the second alternating current contactor KM4 is triggered to be electrified, so that the main contact of the second alternating current contactor KM4 is conducted, and the radio frequency power amplifier 23 is electrified and can start to work normally. The delay on time of the time relay KT2 may be set to 5 s.
At the same time when the coil of the second ac contactor KM4 is activated, the auxiliary contact of the ac contactor KM4 is turned on and the coil of the time relay KT3 is activated. The contact of the time relay KT3 is conducted after time delay, and a coil of the second alternating current contactor KM5 is triggered to be electrified, so that the main contact of the second alternating current contactor KM5 is conducted, and the spectrometer device 24, the physiological monitoring device 25 and the examination bed electric control device 26 are electrified and can start to work normally. The delay on time of the time relay KT3 may be set to 5 s.
By pressing the push button switch SA2 again, the operator will power down all the equipment except the helium compressor 20, the magnet monitoring unit 21 and the oxygen monitor 40. By pressing the push switch SA1 again, the operator will power down all devices.
In summary, an operator can complete the operation of automatically starting a plurality of devices by one key through the button switch SA1 and the button switch SA2, and can start the devices according to the preset starting sequence and the delay time required for starting each device, so that the conflict between the devices during starting is avoided, the devices are damaged or cannot work normally, and meanwhile, the waiting time for starting the devices by the operator is saved; the operator can complete the operation of turning off the plurality of devices by one key by pressing the button switch SA2 again, and the waiting time for the operator to turn off the plurality of devices respectively is saved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (15)
1. A power supply time sequence control circuit is used for connecting a network power supply and each device needing power supply in a magnetic resonance imaging system and is characterized by comprising a first power supply main circuit, a second power supply main circuit and a control loop,
the first power supply main circuit is used for connecting a network power supply and a device which needs to be supplied with power all day in the magnetic resonance imaging system, the first power supply main circuit comprises an alternating current contactor KM1, a first end of a main contact of the alternating current contactor KM1 is connected with the network power supply through a breaker unit, and a second end of the main contact of the alternating current contactor KM1 is a first output end;
the second main power supply circuit comprises an alternating current contactor KM2, a first end of a main contact of an alternating current contactor KM2 is connected with a network power supply through a breaker unit, a second end of the main contact of the alternating current contactor KM2 is a second output end, and the second output end is used for connecting components which do not need all-day power supply;
the control loop comprises a button switch SA1, a button switch SA2, an intermediate relay KA1 and a direct current converter DC, the input end of the direct current converter DC, the first end of a button switch SA1 and the first end of a contact of an intermediate relay KA1 are connected with a network power supply through a breaker unit, the second end of a button switch SA1 is connected with a coil of an alternating current contactor KM1, two ends of the button switch SA2 are respectively connected with the output end of the direct current converter DC and the first end of a coil of the intermediate relay KA1, the second end of the coil of the intermediate relay KA1 is used for being connected with an emergency power failure device of the magnetic resonance imaging system, the second end of the contact of the intermediate relay KA1 is connected with the first end of an auxiliary contact of an alternating current contactor KM1, and the second end of the auxiliary contact of the alternating current;
when the button switch SA2 is pressed, the emergency power-off device operates normally, and the first main power supply circuit is turned on, the second main power supply circuit is turned on, and the all-day power supply unit is not required to be started.
2. The power supply timing control circuit according to claim 1, further comprising at least one timing power supply branch, wherein the timing power supply branch comprises an ac contactor, the ac contactor in the nth timing power supply branch is denoted as nth ac contactor, where N is an integer greater than or equal to 1;
the first end of the main contact of the Nth alternating current contactor and the first end of the auxiliary contact are respectively connected with a network power supply through a circuit breaker unit, and the second end of the main contact of the Nth alternating current contactor is an N +2 th output end;
when N is equal to 1, the coil of the main contact of the Nth alternating current contactor is connected with the second end of the auxiliary contact of the alternating current contactor KM2 in the first timing control power supply loop;
and when N is larger than 1, the coil of the main contact of the Nth alternating current contactor is connected with the second end of the auxiliary contact of the alternating current contactor in the N-1 th time sequence power supply branch circuit.
3. The power supply sequence control circuit according to claim 2, wherein the control loop further comprises at least one time relay corresponding to the sequence power supply branch, the time relay corresponding to the nth sequence power supply branch is marked as an nth time relay, and the first end of the contact of the nth time relay is connected with the coil of the nth alternating current contactor;
when N is equal to 1, the coil of the Nth time relay is connected with the coil of the alternating current contactor KM2 in parallel, and the second end of the contact of the Nth time relay is connected with the second end of the auxiliary contact of the alternating current contactor KM 2;
when N is larger than 1, the coil of the Nth time relay is connected with the coil of the N-1 th alternating current contactor in parallel, and the second end of the contact of the Nth time relay is connected with the second end of the auxiliary contact of the N-1 th alternating current contactor KM 2.
4. The power supply timing control circuit according to claim 2 or 3, wherein the number of the timing power supply branches is three.
5. A magnetic resonance imaging system comprising:
a main magnet, an examining bed and a positioning ventilation device, an oxygen monitor, a computer, a communicator, a video monitoring device, a gradient power amplifier, a radio frequency power amplifier, a spectrometer device, a physiological monitoring device, an examining bed electric control device, an emergency power failure device and a magnet emergency stop device,
the power supply timing control circuit of claim 1 connected to a mains power supply, the power supply timing control circuit having a first output terminal and a second output terminal,
the first output end of the power supply time sequence control circuit is connected with a part needing power supply all day,
the second output end of the power supply time sequence control circuit is connected with a part which does not need power supply all day long,
the second end of the coil of the intermediate relay KA1 is connected with an emergency power cut device of the magnetic resonance imaging system.
6. The magnetic resonance imaging system of claim 5, wherein the all-day power components include an oxygen monitor; or the magnetic resonance imaging system also comprises a helium compressor and a magnet monitoring unit, and the parts needing power supply all day comprise the helium compressor, the magnet monitoring unit and an oxygen monitor.
7. The magnetic resonance imaging system of claim 5, wherein the components that do not require full-day power include computers, communicators, video surveillance equipment, gradient power amplifiers, radio frequency power amplifiers, spectrometer equipment, physiological monitoring equipment, and couch electronics.
8. The system of claim 7, wherein when the power timing control circuit has three timing power branches having a third output terminal, a fourth output terminal and a fifth output terminal,
the second output end of the power supply time sequence control circuit is connected with a computer, a communication device and a video monitoring device,
the third output end of the power supply sequence control circuit is connected with the gradient power amplifier,
the fourth output end of the power supply sequence control circuit is connected with the radio frequency power amplifier,
and a fifth output end of the power supply time sequence control circuit is connected with the spectrometer device, the physiological monitoring device and the examining table electric control device.
9. A power supply timing control method of a magnetic resonance imaging system according to claim 5, characterized by comprising the steps of:
the starting part needs all-day power supply: when the button switch SA1 is pressed, the first power supply main circuit is conducted and needs to be started by the all-day power supply part;
no all-day power supply part is needed for starting: pressing a button switch SA2 to detect whether the emergency power failure device works normally, if so, conducting a second power supply main circuit under the condition that a first power supply main circuit is conducted, and not needing to start a full-day power supply part;
the shutdown does not require all-day power supply components: in the state that the power supply part does not need all days to work, the SA2 button is pressed, and the power supply part does not need all days to be powered down;
shut down all components: in the state that all components work or only the components needing power supply all day work, the button switch SA1 is pressed, and the working components are powered down.
10. The power supply timing control method of a magnetic resonance imaging system according to claim 9, wherein the parts requiring power supply all day includes an oxygen monitor; or the magnetic resonance imaging system also comprises a helium compressor and a magnet monitoring unit, and the parts needing power supply all day comprise the helium compressor, the magnet monitoring unit and an oxygen monitor.
11. The power timing control method of claim 9, wherein the components that do not require power throughout the day include computers, communicators, video monitors, gradient power amplifiers, radio frequency power amplifiers, spectrometers, physiological monitors, and couch controllers.
12. The power supply timing control method of the magnetic resonance imaging system according to claim 11, wherein when the power supply timing control circuit has a first timing power supply branch, a second timing power supply branch and a third timing power supply branch, i.e. has a third output terminal, a fourth output terminal and a fifth output terminal, the steps start other components specifically:
starting the computer, the communication device and the video monitoring device: the first time sequence power supply branch is conducted, the computer, the communication device and the video monitoring device are powered on, and the computer automatically starts and loads software;
starting up the gradient power amplifier: the first time sequence power supply branch is conducted, and the gradient power amplifier is powered on;
starting a radio frequency power amplifier: the second time sequence power supply branch is conducted, and the radio frequency power amplifier is powered on;
starting the spectrometer device, the physiological monitoring device and the examining bed electric control device: and the third time sequence power supply branch is conducted, and the spectrometer device, the physiological monitoring device and the examining table electric control device are electrified.
13. The power supply timing control method for the magnetic resonance imaging system according to claim 12, wherein the first timing power supply branch is set to be turned on with a delay when the gradient power amplifier is started.
14. The power timing control method of claim 12, wherein the second timing power supply branch is turned on to be set to a delayed turn-on when the rf power amplifier is turned on.
15. The power supply timing control method for the magnetic resonance imaging system as claimed in claim 12, wherein the third timing power supply branch is turned on to be set to a delay on when the spectrometer device, the physiological monitor device and the examination table electric control device are started.
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| CN108711939B (en) * | 2018-06-08 | 2022-04-08 | 湖北锐世数字医学影像科技有限公司 | PET-CT power distribution system and method |
| US11799272B2 (en) * | 2019-12-13 | 2023-10-24 | Eaton Intelligent Power Limited | Dual contactor electrical panelboard assembly, systems and methods |
| CN114296412A (en) * | 2021-12-23 | 2022-04-08 | 中铭谷智能机器人(广东)有限公司 | Starting control system and method for multiple devices |
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| CN203166757U (en) * | 2012-12-06 | 2013-08-28 | 深圳市贝斯达医疗器械有限公司 | Magnetic-resonance starting up and shutdown system |
| CN204989817U (en) * | 2015-05-22 | 2016-01-20 | 深圳安科高技术股份有限公司 | Nuclear magnetic resonance switch control circuit and nuclear magnetic resonance switch |
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| CN203166757U (en) * | 2012-12-06 | 2013-08-28 | 深圳市贝斯达医疗器械有限公司 | Magnetic-resonance starting up and shutdown system |
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