Magnetic resonance power monitoring system

Abstract

The utility model relates to a magnetic resonance power monitoring system relates to magnetic resonance power design technical field, including power monitoring box, power monitoring box is connected on the power box through RS232 two -way communication, and power monitoring box inside is provided with the signal acquisition board for detecting the inside data of power monitoring box, and signal acquisition board and industrial computer communication connection, industrial computer and scanning host computer communication connection, and scanning host computer communication connection in internet port. The application is through the special signal acquisition board and the detection algorithm (computing voltage variation absolute value and judging surge, computing three -phase average value deviation percentage and judging unbalance) of customization, realizes the stable identification to the key fault hidden danger in power supply system. This overcomes the shortcoming that traditional high -precision sensor is susceptible to environmental interference, slow response or high operation and maintenance cost in power monitoring application, and the stability and anti -interference ability of detection are improved obviously.

Description

Technical Field

[0001] This utility model relates to the field of magnetic resonance power supply design technology, specifically to a magnetic resonance power supply monitoring system. Background Technology

[0002] Current and voltage monitoring in the field of magnetic resonance imaging (MRI) primarily focuses on monitoring magnets and gradient coils. This involves using high-precision sensors (such as Hall effect sensors, resistance sensors, and superconducting magnet sensors) to measure the current in the magnet or gradient coil in real time, ensuring magnetic field stability and gradient switching accuracy. Hall effect sensors, based on the Hall effect, perform non-contact measurements with response times down to the microsecond level. Resistance sensors, based on Ohm's law, are low-cost but susceptible to temperature drift. Superconducting magnet sensors utilize superconducting materials, offering extremely high accuracy (up to 0.1%), but require a cryogenic environment.

[0003] In the above technical solutions, most high-precision sensors are environmentally sensitive. Hall sensors are susceptible to temperature and external magnetic field interference, while resistance sensors have slow response and weak anti-interference capabilities. Superconducting magnet sensors require liquid nitrogen cooling systems, resulting in high operation and maintenance costs.

[0004] When applied to power supply monitoring in magnetic resonance, surge detection and voltage imbalance detection in the magnetic resonance power supply system cannot be reliably identified. At the same time, modules with high requirements for module voltage stability pose the greatest threat to the gradient system, radio frequency system and superconductor due to voltage instability, which may cause a chain of failures from image artifacts to physical damage to the equipment. Utility Model Content

[0005] The technical problem solved by this utility model is to address the issue that the prior art cannot reliably identify surge detection and voltage detection in power supply systems.

[0006] This utility model can be achieved through the following technical solution: a magnetic resonance power supply monitoring system, including a power supply monitoring box, which is connected to the power supply box via RS232 bidirectional communication. The power supply monitoring box is equipped with a signal acquisition board for detecting data inside the power supply monitoring box, and the signal acquisition board is connected to an industrial control computer. The industrial control computer is connected to a scanning host, and the scanning host is connected to an Internet port.

[0007] A further technical improvement of this utility model is that the model of the acquisition board is STM32F103ZET.

[0008] A further technical improvement of this utility model is that it also includes an isolation transformer, which is installed at the output end of the power supply box via U line, V line and W line respectively. The isolation transformer transforms the three-phase power in the power supply box and outputs it, which is respectively connected to the gradient power amplifier module, power amplifier, spectrometer, front-end box power supply, physiological gate control, industrial control computer and scanning bed.

[0009] A further technical improvement of this utility model is that the gradient power amplifier module is a PCI gradient power amplifier.

[0010] A further technical improvement of this utility model is that the spectrometer is a Fitt Slimscope series nuclear magnetic resonance spectrometer.

[0011] A further technical improvement of this utility model is that the industrial control computer is equipped with an RS232 interface.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This application achieves stable identification of key fault hazards (surges, voltage imbalances) in power systems by using a dedicated signal acquisition board (such as an STM32F103ZET) and a customized detection algorithm (calculating the absolute value of voltage changes to determine surges and calculating the percentage deviation of the three-phase average values ​​to determine imbalances). This overcomes the shortcomings of traditional high-precision sensors (Hall effect, resistance, superconductivity) in power monitoring applications, such as susceptibility to environmental interference, slow response, or high maintenance costs, and significantly improves the stability and anti-interference capability of the detection.

[0013] 2. This application introduces an isolation transformer to process the three-phase power output from the power supply box before distributing it to key subsystems such as gradient power amplifiers, power amplifiers, spectrometers, front-end power supplies, physiological gating systems, industrial control computers, and scanning beds. This effectively isolates power supply interference and noise, providing a cleaner and more stable power supply environment for modules with extremely high voltage stability requirements (such as gradient systems, radio frequency systems, and superconductors), greatly reducing the risk of image artifacts or even physical damage to equipment caused by power supply problems.

[0014] 3. This application establishes a complete communication link (power monitoring box -> signal acquisition board -> industrial control computer -> scanning host -> Internet / web page). This enables the power status (including key indicators such as surge and imbalance) to be collected, transmitted, and ultimately displayed on the web page in real time, facilitating remote monitoring of the power system's operation by operators, timely detection of potential problems, and improvement of operation and maintenance efficiency and response speed. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a flowchart of the detection process of this utility model; Figure 2 This is a schematic diagram of the detection principle of this utility model; Figure 3 This is a schematic diagram illustrating the surge detection principle of this utility model; Figure 4This is a schematic diagram illustrating the imbalance detection principle of this utility model; Figure 5 This is a schematic diagram of the connection of the partition transformer of this utility model; Figure 6 This is a schematic diagram illustrating the effects of voltage surges and imbalances in this invention. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] Please see Figure 1-6 As shown, the magnetic resonance power supply monitoring system includes a power supply monitoring box, which is connected to the power supply unit via RS232 bidirectional communication. Simultaneously, the information from the power supply monitoring box is sent to the industrial control computer via a signal acquisition board, and the information from the signal acquisition board is sent to the industrial control computer via timed information transmission. The information from the industrial control computer is then sent to the scanning host, and finally, the scanning host sends the information to a webpage for display.

[0019] In the above technical solution, the acquisition board uses STM32F103ZET6, the power supply box is developed by those skilled in the art, and the monitoring principle of the power supply monitoring box is to monitor the voltage of the power supply box, that is, to use a voltage transmitter to output the voltage value in the 485 communication format.

[0020] Furthermore, the signal acquisition board acquires information from the power monitoring box by detecting surges and voltage imbalances in the power monitoring box.

[0021] An isolation transformer is installed at the output end of the power supply box and connected to the output end of the power supply box via U-line, V-line and W-line respectively. The isolation transformer transforms the three-phase power in the power supply box and outputs it, which is then connected to the gradient power amplifier module, power amplifier, spectrometer, front-end box power supply, physiological gate, industrial computer and scanning bed respectively.

[0022] In the above technical solution, the isolation transformer is connected to the gradient power amplifier module via U-line, V-line and W-line, wherein the gradient power amplifier module is a PCI gradient power amplifier, and the power amplifier is a very deep one, such as the PCI gradient power amplifier with model number QDCM2100D.

[0023] Furthermore, the isolation transformer is connected to the spectrometer, the front-end power supply, and the physiological gate control via the L and N lines, respectively. The physiological gate control is a self-developed device, the spectrometer is a Fitt Slimscope series nuclear magnetic resonance spectrometer, and the front-end power supply is a high-performance device. The L line is the live wire, and the N line is the neutral wire.

[0024] Furthermore, the industrial control computer is connected to the output end of the isolation transformer via L and N lines, and the industrial control computer is equipped with an RS232 interface.

[0025] Furthermore, the scanning bed is a self-developed scanning bed controlled by STM32, and the scanning bed is connected to the output end of the isolation transformer via L line and N line.

[0026] The detection principle is as follows: In this application, the power supply box is connected to the power monitoring box through an interface. The power monitoring box sends an inquiry command, and the power supply box replies with information after receiving the command. The information is then output through the serial port of the acquisition board's ADC and connected to the main acquisition board through RS232 bidirectional communication.

[0027] The principle of surge detection is as follows: the received data is processed, that is, the absolute value of the voltage and the previous voltage change value is calculated, and then it is determined whether the absolute value exceeds the threshold. If so, the period of exceeding the threshold is determined. If the surge continues for three consecutive periods, the surge state is obtained, and the previous surge state value is updated.

[0028] The principle of unbalance detection is as follows: the obtained three-phase voltage values ​​are calculated to obtain the average value of the three-phase voltage. Then, to prevent the operation of dividing the voltage by 0, the percentage deviation of each item from the average value is calculated, and it is determined whether it exceeds the percentage threshold. If it does, the voltage unbalance flag is returned.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A magnetic resonance power supply monitoring system, characterized in that: The device includes a power monitoring box, which is connected to a power supply box via RS232 bidirectional communication. The power monitoring box is equipped with a signal acquisition board for detecting data inside the power monitoring box. The signal acquisition board is connected to an industrial control computer, the industrial control computer is connected to a scanning host, and the scanning host is connected to an Internet port.

2. The magnetic resonance power supply monitoring system according to claim 1, characterized in that, The acquisition board is model STM32F103ZET.

3. The magnetic resonance power supply monitoring system according to claim 1, characterized in that, It also includes an isolation transformer, which is installed at the output end of the power supply box via U line, V line and W line respectively. The isolation transformer transforms the three-phase power in the power supply box and outputs it, which is connected to the gradient power amplifier module, power amplifier, spectrometer, front-end box power supply, physiological gate, industrial control computer and scanning bed respectively.

4. The magnetic resonance power supply monitoring system according to claim 3, characterized in that, The gradient power amplifier module is a PCI gradient power amplifier.

5. The magnetic resonance power supply monitoring system according to claim 3, characterized in that, The spectrometer in question is a Fitt Slimscope series nuclear magnetic resonance spectrometer.

6. The magnetic resonance power supply monitoring system according to claim 3, characterized in that, The industrial control computer is equipped with an RS232 interface.

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