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Gradient power amplifier reliability test system and method

A power amplifier and test system technology, applied to power amplifiers, improved amplifiers to reduce temperature/power supply voltage changes, etc., can solve problems such as complex reliability issues, complex structures of large-scale medical imaging equipment, and small overall scale. The effect of normal operation

Pending Publication Date: 2021-08-06
上海市医疗器械检验研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the complex structure of large-scale medical imaging equipment and involving many disciplines, its reliability issues are very complicated. There are few existing institutions engaged in related reliability research, and the overall scale of related enterprises is not large, and reliability research is weak. Equipment reliability is very important

Method used

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  • Gradient power amplifier reliability test system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] An embodiment of the invention, such as figure 1 As shown, the present invention provides a gradient power amplifier reliability test system, including a signal generator 1, a gradient power amplifier 2, a gradient coil 3, and a control terminal 4.

[0043] The signal generator 1 is configured to provide a test small signal; the gradient power amplifier 2 is connected to the signal generator 1 for receiving the test small signal, and amplifies and delivers the test small signal, obtaining X, Y, Z three-circuit current.

[0044] The gradient coil 3 is connected to the gradient power amplifier 2 for receiving the X-channel current and / or Y channel current and / or Z channel current output from the gradient power amplifier 2.

[0045] The control terminal 4 is connected to the gradient power amplifier 2 for detecting the output current of the gradient power amplifier 2.

[0046] The test small signal is supplied to the gradient power amplifier 2 through the signal generator ...

Embodiment 2

[0049] An embodiment of the invention, such as figure 1 As shown, on the basis of the first embodiment, the gradient power amplifier reliability test system provided by the present invention further includes a water cooler 5 and a filter plate 6, and a water-cooler 5 is connected to a gradient power amplifier 2 and a gradient coil 3 for use. Enter the circulating water to the gradient power amplifier 2 and the gradient coil 3.

[0050] Specifically, before the hydropower connection, it was confirmed that the water cooler 5 closed, the test power is turned off, and the water-cooler 5 is connected to the gradient power amplifier 2 and the gradient coil 3, and the gradient power amplifier 2 is required. Install the rubber gasket, in the test, first open the water cooler 5, after the flow rate of the circulating water is stabilized, the gradient power amplifier 2 is powered on. The flow rate of the circulating water is adjusted according to the actual situation, such as the flow rate ...

Embodiment 3

[0053] According to an embodiment of the present invention, on the basis of Example 1 or 2, a triaxial output terminal is provided on the gradient power amplifier 2, and the three-axis output end is used to output X, Y, Z three-circuit current, and the gradient coil 3 is passed through three. The axis cable is connected to the three-axis output.

[0054] Preferably, the gradient power amplifier 2 is provided with a control cartridge 7, and the control cartridge 7 is provided with an X enable button, the Y enable button, and the Z enable button, respectively, respectively, respectively, respectively.

[0055] The control cartridge 7 is connected to the control terminal 4 via the X signal line, the Y signal line, and the z signal line, respectively, and is used to acquire the enable state of the X, Y, Z three-channel current, respectively.

[0056] Specifically, in the present embodiment, it is possible to first press the X enable button, the Y enable button and the z enable button,...

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Abstract

The invention provides a gradient power amplifier reliability test system and method, and the system comprises a signal generator which is used for providing a small test signal; a gradient power amplifier, which is connected with the signal generator and is used for receiving the small test signal and amplifying and shunting the small test signal to obtain X, Y and Z paths of current; a gradient coil, which is connected with the gradient power amplifier and 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; a control terminal, which is connected with the gradient power amplifier and is used for detecting the output current of the gradient power amplifier. According to the scheme, the accuracy and reliability of the output current of the gradient power amplifier can be tested, thereby ensuring normal operation of large medical imaging equipment.

Description

Technical field [0001] The present invention relates to the field of gradient power amplifiers, especially a gradient power amplifier reliability test system and method. Background technique [0002] Large-scale medical imaging equipment, such as magnetic resonance imaging (MRI), CT, PETCT, etc., the imaging technology using the resonance characteristics of the biological magnetic core in the magnetic field, which has no electrical radiation, no damage, high resolution, high Contrast, multi-parameter imaging, and arbitrary direction cross-sectional imaging, and wide application in the field of medical imaging. Gradient Power Amplifier, referred to as GPA) is an important part of a large medical imaging device. It is responsible for enlarged reference signals emitted by the predecessor control system, driving the post-grade gradient coil, generating a linear change gradient magnetic field in imaging space For functions such as chip select, frequency coding, and phase coding. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20H03F1/30
CPCH03F3/20H03F1/30
Inventor 胡晟杨煜刘勋贺飞
Owner 上海市医疗器械检验研究院
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