CN113225032A - System and method for testing reliability of gradient power amplifier - Google Patents
System and method for testing reliability of gradient power amplifier Download PDFInfo
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- 238000010998 test method Methods 0.000 claims description 2
- 238000002059 diagnostic imaging Methods 0.000 abstract description 13
- 238000003384 imaging method Methods 0.000 description 5
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- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
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Abstract
The invention provides a system and a method for testing the reliability of a gradient power amplifier, wherein the system comprises: a signal generator for providing a test small signal; the gradient power amplifier is connected with the signal generator and used for receiving the test small signal, amplifying and shunting the test small signal to obtain X, Y, Z three paths of current; the gradient coil is connected with the gradient power amplifier and is used for receiving the X-path current and/or the Y-path current and/or the Z-path current output by the gradient power amplifier; and the control terminal is connected with the gradient power amplifier and is used for detecting the output current of the gradient power amplifier. The scheme can test the accuracy and reliability of the output current of the gradient power amplifier, thereby ensuring that large-scale medical imaging equipment can normally operate.
Description
Technical Field
The invention relates to the technical field of gradient power amplifiers, in particular to a system and a method for testing the reliability of a gradient power amplifier.
Background
Large medical imaging devices, such as Magnetic Resonance Imaging (MRI), CT, PETCT, etc., are imaging techniques that utilize the resonance characteristics of the magnetic nuclei of living organisms in a magnetic field to perform imaging, have the characteristics of no ionizing radiation, no damage, high resolution, high contrast, multi-parameter imaging, cross-sectional imaging in any direction, etc., and are widely used in the field of medical imaging. A Gradient Power Amplifier (GPA) is an important component of a large medical imaging device, and is responsible for amplifying a reference signal sent by a preceding stage control system, driving a subsequent stage Gradient coil, and generating a linearly changing Gradient magnetic field in an imaging space, so as to realize functions of chip selection, frequency encoding, phase encoding, and the like.
Because the structure of the large-scale medical imaging equipment is complex, numerous disciplines are involved, the reliability problem is very complex, the existing mechanisms for relevant reliability research are few, the whole scale of relevant enterprises is not large, the reliability research is weak, and the reliability of the medical imaging equipment is very important. Therefore, a testing system capable of testing the accuracy and reliability of the output current of the gradient power amplifier is required to ensure the normal operation of the large-scale medical imaging equipment.
Disclosure of Invention
The invention aims to provide a system and a method for testing the reliability of a gradient power amplifier, which can test the accuracy and the reliability of the output current of the gradient power amplifier, thereby ensuring that large-scale medical imaging equipment can normally operate.
The technical scheme provided by the invention is as follows:
the invention provides a reliability test system of a gradient power amplifier, which comprises:
a signal generator for providing a test small signal;
the gradient power amplifier is connected with the signal generator and used for receiving the test small signal, amplifying and shunting the test small signal to obtain X, Y, Z three paths of current;
the gradient coil is connected with the gradient power amplifier and is used for receiving the X-path current and/or the Y-path current and/or the Z-path current output by the gradient power amplifier;
and the control terminal is connected with the gradient power amplifier and is used for detecting the output current of the gradient power amplifier.
The signal generator provides a test small signal for the gradient power amplifier, the gradient power amplifier can amplify and shunt the test small signal to obtain X, Y, Z three paths of current, the gradient power amplifier is controlled to output X path current and/or Y path current and/or Z path current to the gradient coil, the current output condition of the gradient power amplifier is detected in real time through the control terminal, the accuracy and reliability of the output current of the gradient power amplifier can be confirmed, and therefore the normal operation of large medical imaging equipment can be guaranteed.
Specifically, the control terminal is a computer and the like, is provided with test software, can detect and display the current output condition of the gradient power amplifier, and can correspondingly display a green state when the X-path current is enabled, so that a worker can conveniently and directly judge the current output condition.
Further, still include: and the water cooler is respectively connected with the gradient power amplifier and the gradient coil and is used for inputting circulating water to the gradient power amplifier and the gradient coil.
Specifically, before water and electricity are connected, the closing state of a water cooler and the disconnection state of a test power supply are confirmed, the water cooler is connected with a gradient power amplifier and a gradient coil respectively, rubber sealing gaskets are required to be installed at a water inlet and a water outlet of the gradient power amplifier, the water cooler is opened firstly during testing, and the gradient power amplifier is electrified after the flow rate of circulating water is stable. The flow rate of the circulating water is adjusted according to the actual situation, for example, the flow of the gradient power amplifier is more than or equal to 40L/min, and the flow of the gradient coil is between 32L/min and 40L/min.
Further, still include: a filter plate disposed between the gradient power amplifier and the gradient coil, so that an output current of the gradient power amplifier is input to the gradient coil through the filter plate.
Furthermore, the gradient power amplifier is provided with three-axis output ends, the three-axis output ends are respectively used for outputting X, Y, Z three paths of current,
the gradient coil is connected with the triaxial output end through a triaxial cable.
Furthermore, a control box is arranged on the gradient power amplifier, and an X enable button, a Y enable button and a Z enable button which are respectively used for controlling X, Y, Z three-path current enabling are arranged on the control box.
Further, the control box is connected with the control terminal through an X signal line, a Y signal line and a Z signal line, and is respectively used for acquiring X, Y, Z enabling states of the three currents.
Specifically, in this embodiment, the control box may first press the X enable button, the Y enable button, and the Z enable button at the same time, and the control terminal obtains X, Y, Z the enable states of the three paths of currents; and then the control box presses the X enable button, the Y enable button and the Z enable button one by one, and the control terminal respectively obtains X, Y, Z enabling states of the three paths of currents.
In addition, the invention also provides a reliability testing method of the gradient power amplifier, which comprises the following steps:
providing a test small signal to the gradient power amplifier through the signal transmitter;
amplifying and shunting the test small signal through the gradient power amplifier to obtain X, Y, Z three paths of currents;
controlling the gradient power amplifier to output X-path current and/or Y-path current and/or Z-path current to a gradient coil;
and detecting the output current of the gradient power amplifier in real time through a control terminal.
The signal generator provides a test small signal for the gradient power amplifier, the gradient power amplifier can amplify and shunt the test small signal to obtain X, Y, Z three paths of current, the gradient power amplifier is controlled to output X path current and/or Y path current and/or Z path current to the gradient coil, the current output condition of the gradient power amplifier is detected in real time through the control terminal, the accuracy and reliability of the output current of the gradient power amplifier can be confirmed, and therefore the normal operation of large medical imaging equipment can be guaranteed.
Further, before the test small signal is provided to the gradient power amplifier by the signal transmitter, the method further includes the steps of:
connecting the gradient power amplifier and the gradient coil with a water cooler;
and opening the water cooling machine, and electrifying the gradient power amplifier after the flow rate of the circulating water is stable.
Further, after obtaining X, Y, Z three paths of currents, the method specifically includes:
simultaneously pressing an X enabling button, a Y enabling button and a Z enabling button through a control box, and obtaining X, Y, Z the enabling state of three paths of current by the control terminal;
and pressing the X enabling button, the Y enabling button and the Z enabling button one by one through the control box, and respectively acquiring X, Y, Z enabling states of the three paths of currents by the control terminal.
Further, still include: and adjusting the output parameters of the signal generator, and repeatedly testing.
According to the system and the method for testing the reliability of the gradient power amplifier, provided by the invention, the signal generator is used for providing the test small signal for the gradient power amplifier, the gradient power amplifier can amplify and shunt the test small signal to obtain X, Y, Z three paths of currents, the gradient power amplifier is controlled to output X-path current and/or Y-path current and/or Z-path current to the gradient coil, the current output condition of the gradient power amplifier is detected in real time through the control terminal, the accuracy and the reliability of the output current of the gradient power amplifier can be confirmed, and therefore, the normal operation of large-scale medical imaging equipment can be ensured.
Drawings
The foregoing features, technical features, advantages and embodiments of the present invention will be further explained in the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic flow chart of an embodiment of the present invention.
Reference numbers in the figures: 1-a signal generator; 2-gradient power amplifier; 3-a gradient coil; 4-control the terminal; 5-a water cooling machine; 6-a filter plate; 7-control box.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
Example 1
One embodiment of the present invention, as shown in fig. 1, provides a reliability testing system for gradient power amplifier, which includes a signal generator 1, a gradient power amplifier 2, a gradient coil 3 and a control terminal 4.
The signal generator 1 is used for providing a test small signal; the gradient power amplifier 2 is connected with the signal generator 1, and is used for receiving the test small signal, amplifying and shunting the test small signal, and obtaining X, Y, Z three paths of current.
The gradient coil 3 is connected with the gradient power amplifier 2 and is used for receiving the X-path current and/or the Y-path current and/or the Z-path current output by the gradient power amplifier 2.
The control terminal 4 is connected to the gradient power amplifier 2 for detecting the output current of the gradient power amplifier 2.
The signal generator 1 provides a test small signal for the gradient power amplifier 2, the gradient power amplifier 2 can amplify and shunt the test small signal to obtain X, Y, Z three paths of current, the gradient power amplifier 2 is controlled to output X path current and/or Y path current and/or Z path current to the gradient coil 3, the current output condition of the gradient power amplifier 2 is detected in real time through the control terminal 4, the accuracy and reliability of the output current of the gradient power amplifier 2 can be confirmed, and therefore the normal operation of large medical imaging equipment can be guaranteed.
Specifically, the control terminal 4 is a computer or the like, is provided with test software, and can detect and display the current output condition of the gradient power amplifier 2, for example, when the X-path current is enabled, a green state can be correspondingly displayed, so that a worker can directly judge the current output condition conveniently.
Example 2
In an embodiment of the present invention, as shown in fig. 1, on the basis of embodiment 1, the system for testing reliability of a gradient power amplifier provided by the present invention further includes: the water cooling machine 5 is connected with the gradient power amplifier 2 and the gradient coil 3 respectively, and is used for inputting circulating water to the gradient power amplifier 2 and the gradient coil 3.
Specifically, before water and electricity are connected, the closing state of the water cooler 5 and the disconnection state of the test power supply are confirmed, the water cooler 5 is connected with the gradient power amplifier 2 and the gradient coil 3 respectively, rubber sealing gaskets are required to be installed at a water inlet and a water outlet of the gradient power amplifier 2, the water cooler 5 is opened firstly during testing, and the gradient power amplifier 2 is electrified after the flow rate of circulating water is stable. The flow rate of the circulating water is adjusted according to the actual situation, for example, the flow rate of the gradient power amplifier 2 is more than or equal to 40L/min, and the flow rate of the gradient coil 3 is between 32L/min and 40L/min.
The filter plate 6 is provided between the gradient power amplifier 2 and the gradient coil 3, so that the output current of the gradient power amplifier 2 is input to the gradient coil 3 through the filter plate.
Example 3
In an embodiment of the present invention, on the basis of embodiment 1 or 2, the gradient power amplifier 2 is provided with a triaxial output end, the triaxial output ends are respectively used for outputting X, Y, Z three paths of currents, and the gradient coil 3 is connected to the triaxial output end through a triaxial cable.
Preferably, the gradient power amplifier 2 is provided with a control box 7, and the control box 7 is provided with an X enable button, a Y enable button and a Z enable button for controlling X, Y, Z three-way current enabling respectively.
The control box 7 is connected with the control terminal 4 through an X signal line, a Y signal line and a Z signal line, and is used for acquiring X, Y, Z the enabling states of the three currents respectively.
Specifically, in this embodiment, the control box 7 may first press the X enable button, the Y enable button, and the Z enable button at the same time, so that the control terminal 4 obtains X, Y, Z the enable states of the three paths of currents; and then the control box presses the X enable button, the Y enable button and the Z enable button one by one, and the control terminal 4 respectively obtains X, Y, Z the enabling states of the three paths of currents.
Example 4
In one embodiment of the present invention, the present scheme is implemented by moving GPA (i.e. gradient power amplifier) to the test area; the appearance of the cabinet is checked to be free from scratches and stains, and whether the installation accessories are complete is checked; the sequence number and version of the GPA are checked and recorded from the version table.
Before water and electricity are connected, confirming the closing state of the water cooling machine and the disconnection state of the test power supply; the method comprises the following steps of connecting a GPA (general purpose amplifier), a gradient coil and a water cooler, wherein rubber sealing gaskets which are attached randomly are required to be installed at a water inlet and a water outlet of the GPA; and 7 cross screws on the triaxial output box are removed, and the cover plate is removed.
Connecting a triaxial cable of the gradient coil to a triaxial output end corresponding to the GPA according to a label, and fixing the triaxial cable by using 6M 10 nuts, flat pads and elastic pads with the torque of 20.0 N.m; the X, Y, Z and PS signal lines are connected with corresponding interfaces of the control box, and the RS232 interface is connected with a test computer through a USB adapter.
6 cross screws on the main power supply box are removed, and the cover plate is removed; the live wires L1, L2 and L3 of the power line penetrate through the magnetic core, are connected to the three-phase input end of the GPA according to the label, and are fixed by an M8 flange nut and a flat pad, and the moment is 9.0 N.m; the power ground was connected to the ground of the GPA, held in place with M8 flange nuts and flat washers, with a torque of 9.0 n.m.
Turning on a water cooling machine, adjusting the GPA flow to be more than or equal to 40L/min, adjusting the gradient coil flow to be 32-40L/min, and electrifying the GPA; opening GPA control software on a test computer, clicking File- > Connect …, clicking a Scan button in a popped dialog box, and clicking the Connect button after the Connection manager scans GPA interface information; clicking Modules- > Status to open a state display interface; pressing a PS ON button of the GPA control box, wherein the RTC HV Power Supply Enabled and HV Power Supply Output ON states should display green; pressing the MODE button of the GPA Control box checks the three-axis Model through the software Modules- > Control- > X, Y, Z, and the MODE is Normal MODE.
Pressing control box X, Y, Z Enable button, X, Y, Z three axis RTC Enable and Internal Enable status should display green, three axis in Enable status; when the control box X, Y and the Z Enable button are pressed again, the green of RTC Enable and Internal Enable of X, Y, Z three axes disappears, and the three axes are in Disable (Enable Disable) state.
The unipolar test sequence was adjusted using a function generator with the following parameters: output voltage: u is 10V; cycle time: TR is 270 ms; the platform time is as follows: FT is 10 ms; climbing time: RT is 500 us; cycles 500 presses the OutPut button.
Pressing an X Enable button of the control box, wherein the RTC Enable and the Internal Enable states of the X axis should display green, the X axis is in the Enable state, and the states always display green, namely, no error is reported in the test; when the control box X Enable button is pressed again, the RTC Enable and the Internal Enable on the X axis disappear in green, and the X axis is in a Disable state.
When a Y Enable button of the control box is pressed, the states of RTC Enable and Internal Enable of the Y axis should be displayed in green, the Y axis is in Enable state, and the states are displayed in green all the time, namely, no error is reported in the test; when the Y Enable button of the control box is pressed again, the green of RTC Enable and Internal Enable of the Y axis disappears, and the Y axis is in a Disable state.
When the Z Enable button of the control box is pressed, the states of RTC Enable and Internal Enable of the Z axis are displayed in green, the Z axis is in Enable state, the state is displayed in green all the time, namely, the Z Enable button of the control box is pressed again without error report in test, the green of RTC Enable and Internal Enable of the Z axis disappears, and the Z axis is in Disable state.
The unipolar test sequence was adjusted using a function generator with the following parameters: output voltage: u is 8.9V; cycle time: TR is 270 ms; the platform time is as follows: FT is 10 ms; climbing time: RT is 200 us; cycles 500 presses the OutPut button.
Pressing an X Enable button of the control box, wherein the RTC Enable and the Internal Enable states of the X axis should display green, the X axis is in the Enable state, and the states always display green, namely, no error is reported in the test; when the control box X Enable button is pressed again, the RTC Enable and the Internal Enable on the X axis disappear in green, and the X axis is in a Disable state.
When a Y Enable button of the control box is pressed, the states of RTC Enable and Internal Enable of the Y axis should be displayed in green, the Y axis is in Enable state, and the states are displayed in green all the time, namely, no error is reported in the test; when the Y Enable button of the control box is pressed again, the green of RTC Enable and Internal Enable of the Y axis disappears, and the Y axis is in a Disable state.
When a Z Enable button of the control box is pressed, the RTC Enable and the Internal Enable states of the Z axis should display green, the Z axis is in the Enable state, and the states always display green, namely, no error is reported in the test; when the Z Enable button of the control box is pressed again, the green of the RTC Enable and the Internal Enable of the Z axis disappears, and the Z axis is in a Disable state.
Adjusting a bipolar test sequence by using a function generator, setting parameters, and pressing an OutPut button; pressing an X Enable button of the control box, wherein the RTC Enable and the Internal Enable states of the X axis should display green, the X axis is in the Enable state, and the states always display green, namely, no error is reported in the test; after the test is finished, the X Enable button of the control box is pressed again, the RTC Enable and the Internal Enable green of the X axis disappear, and the X axis is in a Disable state.
When a Y Enable button of the control box is pressed, the states of RTC Enable and Internal Enable of the Y axis should be displayed in green, the Y axis is in Enable state, and the states are displayed in green all the time, namely, no error is reported in the test; after the test is finished, the Y Enable button of the control box is pressed again, the RTC Enable and the Internal Enable green of the Y axis disappear, and the Y axis is in a Disable state.
When a Z Enable button of the control box is pressed, the RTC Enable and the Internal Enable states of the Z axis should display green, the Z axis is in the Enable state, and the states always display green, namely, no error is reported in the test; after the test is finished, the Z Enable button of the control box is pressed again, the RTC Enable and the Internal Enable green of the Z axis disappear, and the Z axis is in a Disable state.
The bipolar test sequence was adjusted using a function generator with the following parameters: output voltage: u is 4.0V; cycle time: TR is 50 ms; the platform time is as follows: FT 13360 us; climbing time: RT is 500 us; cycles: 36000 press the OutPut button.
When the control box X, Y and the Z Enable button are pressed, the RTC Enable and the Internal Enable states of the three axes should display green, the three axes are in the Enable state, and the states always display green, namely, no error is reported in the test; after the test is finished, X, Y and Z Enable buttons are pressed, the green of RTC Enable and Internal Enable of the three axes disappears, and the three axes are in Disable state.
Pressing a Mode button of the control box, pressing a PS ON button, returning the GPA to an initial state, and closing Ampronitor software; disconnecting the GPA main power switch; closing water inlet and outlet valves of the water cooler, and disconnecting a power switch of the water cooler; and testing the phase voltage of the power supply by using a multimeter, and removing the cable below 10V. After a main power supply cable, a control cable and a three-axis output cable on the GPA are removed, the cover plate is installed back; an M10 flat pad, an elastic pad and a nut are arranged on the top plate grounding stud; and the quick plug connection of the GPA main water inlet pipe and the GPA main water outlet pipe and the secondary water pipe of the water cooling machine is disconnected.
Example 5
An embodiment of the present invention, as shown in fig. 2, further provides a method for testing reliability of a gradient power amplifier, including the steps of:
and S1, providing the test small signal to the gradient power amplifier through the signal transmitter.
And S2, amplifying and shunting the small test signal through a gradient power amplifier to obtain X, Y, Z three paths of currents.
And S3, controlling the gradient power amplifier to output the X-path current and/or the Y-path current and/or the Z-path current to the gradient coil.
And S4, detecting the output current of the gradient power amplifier in real time through the control terminal.
And S5, adjusting the output parameters of the signal generator, and repeating the test.
The signal generator provides a test small signal for the gradient power amplifier, the gradient power amplifier can amplify and shunt the test small signal to obtain X, Y, Z three paths of current, the gradient power amplifier is controlled to output X path current and/or Y path current and/or Z path current to the gradient coil, the current output condition of the gradient power amplifier is detected in real time through the control terminal, the accuracy and reliability of the output current of the gradient power amplifier can be confirmed, and therefore the normal operation of large medical imaging equipment can be guaranteed.
Preferably, before the test small signal is provided to the gradient power amplifier by the signal transmitter, the method further comprises the steps of: connecting the gradient power amplifier and the gradient coil with a water cooling machine; and opening the water cooling machine, and electrifying the gradient power amplifier after the flow rate of the circulating water is stable.
Specifically, before water and electricity are connected, the closing state of a water cooler and the disconnection state of a test power supply are confirmed, the water cooler is connected with a gradient power amplifier and a gradient coil respectively, rubber sealing gaskets are required to be installed at a water inlet and a water outlet of the gradient power amplifier, the water cooler is opened firstly during testing, and the gradient power amplifier is electrified after the flow rate of circulating water is stable. The flow rate of the circulating water is adjusted according to the actual situation, for example, the flow of the gradient power amplifier is more than or equal to 40L/min, and the flow of the gradient coil is between 32L/min and 40L/min.
Preferably, after obtaining X, Y, Z three paths of currents, the method specifically comprises:
simultaneously pressing an X enable button, a Y enable button and a Z enable button through the control box, and obtaining X, Y, Z the enabling states of the three paths of currents by the control terminal; and the control terminal respectively acquires X, Y, Z enabling states of the three paths of currents by pressing the X enabling button, the Y enabling button and the Z enabling button one by one through the control box. The specific test methods are described in the above examples, and are not intended to be exhaustive.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A gradient power amplifier reliability test system, comprising:
a signal generator for providing a test small signal;
the gradient power amplifier is connected with the signal generator and used for receiving the test small signal, amplifying and shunting the test small signal to obtain X, Y, Z three paths of current;
the gradient coil is connected with the gradient power amplifier and is used for receiving the X-path current and/or the Y-path current and/or the Z-path current output by the gradient power amplifier;
and the control terminal is connected with the gradient power amplifier and is used for detecting the output current of the gradient power amplifier.
2. The gradient power amplifier reliability test system of claim 1, further comprising: and the water cooler is respectively connected with the gradient power amplifier and the gradient coil and is used for inputting circulating water to the gradient power amplifier and the gradient coil.
3. The gradient power amplifier reliability test system of claim 1, further comprising: a filter plate disposed between the gradient power amplifier and the gradient coil, so that an output current of the gradient power amplifier is input to the gradient coil through the filter plate.
4. The gradient power amplifier reliability test system of claim 1, wherein: the gradient power amplifier is provided with a three-axis output end which is respectively used for outputting X, Y, Z three paths of current,
the gradient coil is connected with the triaxial output end through a triaxial cable.
5. The gradient power amplifier reliability test system of claim 1, wherein: the gradient power amplifier is provided with a control box, and the control box is provided with an X enable button, a Y enable button and a Z enable button which are respectively used for controlling X, Y, Z three paths of current to enable.
6. The gradient power amplifier reliability test system of claim 5, wherein: the control box is connected with the control terminal through an X signal line, a Y signal line and a Z signal line and is respectively used for acquiring the enabling states of X, Y, Z three paths of currents.
7. A reliability test method for a gradient power amplifier is characterized by comprising the following steps:
providing a test small signal to the gradient power amplifier through the signal transmitter;
amplifying and shunting the test small signal through the gradient power amplifier to obtain X, Y, Z three paths of currents;
controlling the gradient power amplifier to output X-path current and/or Y-path current and/or Z-path current to a gradient coil;
and detecting the output current of the gradient power amplifier in real time through a control terminal.
8. The method as claimed in claim 7, wherein before the step of providing the test small signal to the gradient power amplifier via the signal transmitter, the method further comprises the steps of:
connecting the gradient power amplifier and the gradient coil with a water cooler;
and opening the water cooling machine, and electrifying the gradient power amplifier after the flow rate of the circulating water is stable.
9. The method for testing the reliability of a gradient power amplifier according to claim 7, wherein after obtaining X, Y, Z three paths of currents, the method specifically comprises:
simultaneously pressing an X enabling button, a Y enabling button and a Z enabling button through a control box, and obtaining X, Y, Z the enabling state of three paths of current by the control terminal;
and pressing the X enabling button, the Y enabling button and the Z enabling button one by one through the control box, and respectively acquiring X, Y, Z enabling states of the three paths of currents by the control terminal.
10. The method for testing reliability of a gradient power amplifier according to claim 7, further comprising:
and adjusting the output parameters of the signal generator, and repeatedly testing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114422043A (en) * | 2022-03-28 | 2022-04-29 | 成都嘉纳海威科技有限责任公司 | Reliability test device and method |
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