High-Voltage Protection Method, System, and Computer-Readable Storage Medium for a Pre-Charge Circuit

Abstract

The present invention provides a high-voltage protection method, system and computer-readable storage medium for a pre-charge circuit. By detecting the high-voltage output state and high-voltage feedback state on a data communication board connected to the pre-charge circuit in real time, high-voltage real-time protection can be achieved; for the case of illegal power-off, when the system restarts, the high-voltage output on the data communication board is first turned off to avoid the high-voltage pre-charge circuit from being subjected to an instantaneous large current impact.

Description

Technical Field

[0001] The present invention relates to the technical field of CT machines, and particularly to a high-voltage protection method, system, and computer-readable storage medium for a pre-charge circuit. Background Art

[0002] Currently, after the high-voltage part of a CT machine is illegally powered off, since there is a pre-charge (pre-charge circuit) inside the high voltage, when the 380V input of the high voltage is illegally turned off, because the 220V of the DCB powers the system independently, the DCB board continues to control the high-voltage I / O port (input / output interface) according to the instructions of the upper computer. At this time, if the system is restarted, since the I / O port output circuit is also in an open state, the high-voltage pre-charge circuit will be subjected to an instantaneous large current impact, and there is a high probability that the high voltage will be burned out.

[0003] The prior art usually adopts the method of replacing the high-voltage controller after the high voltage is damaged, without taking protective measures for the high voltage. Summary of the Invention

[0004] In order to overcome the above technical defects, the purpose of the present invention is to provide a high-voltage protection method, system, and computer-readable storage medium for a pre-charge circuit that can prevent the pre-charge circuit from being burned by high voltage when the CT machine is restarted after an illegal power-off.

[0005] The present invention discloses a high-voltage protection method for a pre-charge circuit, which is used for a CT machine and is for the restart process after the CT machine is powered off. The restart process includes the following steps: the upper computer reads the high-voltage output state and high-voltage feedback state on the data communication board connected to the pre-charge circuit in real time; when it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected, the upper computer controls to first turn off the high-voltage output on the data communication board, and then turn on the high-voltage output on the data communication board to perform subsequent restart steps.

[0006] Preferably, the situation that there is a high-voltage output on the data communication board but no high-voltage feedback is detected includes: it is read that the high-voltage contactor, anode rotation switch, and filament current switch for controlling the high voltage on the data communication board are all in an open state, but no high-voltage contactor signal, anode rotation switch signal, and filament current switch signal are detected.

[0007] Preferably, the upper computer controls to first turn off the high-voltage output on the data communication board includes: first turning off the filament current switch, then turning off the anode rotation switch, and finally turning off the high-voltage contactor.

[0008] Preferably, the upper computer controls to turn on the high-voltage output on the data communication board includes: first turning on the high-voltage contactor, then turning on the anode rotation switch, and finally turning on the filament current switch.

[0009] Preferably, the host computer controls to turn on the high-voltage output on the data communication board for the subsequent restart steps, which include: first turning on the high-voltage contactor, and the host computer reads the bus voltage of the pre-charge circuit; if the bus voltage is within the first preset range, then turn on the anode rotation switch; and the host computer reads the anode rotation signal; if the bus voltage is not within the first preset range, then interrupt the restart process and issue a prompt signal; if the anode rotation signal is within the second preset range, then turn on the filament current switch; and the host computer reads the filament current signal;

[0010] Preferably, if the anode rotation signal is not within the second preset range, then interrupt the restart process and issue a prompt signal; if the filament current signal is within the third preset range, then perform the subsequent restart steps; if the filament current signal is not within the third preset range, then interrupt the restart process and issue a prompt signal.

[0011] Preferably, the data communication board is a ceramic-based copper clad laminate.

[0012] Preferably, the high voltage is 380V, and the data communication board is powered separately by 220V current.

[0013] Preferably, when it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected, the host computer controls to first turn off the high-voltage output on the data communication board and then turn on the high-voltage output on the data communication board for the subsequent restart steps, which include: when it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected, the host computer controls to first turn off the high-voltage output on the data communication board; then the host computer reads the high-voltage output state and high-voltage feedback state on the data communication board. When it is read that there is no high-voltage output and no high-voltage feedback is detected on the data communication board, turn on the high-voltage output on the data communication board for the subsequent restart steps.

[0014] The present invention also discloses a high-voltage protection system for a pre-charge circuit, which is used for a CT scanner and includes a host computer and a data communication board. The host computer is connected to the pre-charge circuit through the data communication board; for the restart process after the CT scanner is powered off, the restart process includes the following steps: the host computer reads the high-voltage output state and high-voltage feedback state on the data communication board in real time; when it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected, the host computer controls to first turn off the high-voltage output on the data communication board and then turn on the high-voltage output on the data communication board for the subsequent restart steps.

[0015] The present invention also discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the high-voltage protection method are implemented.

[0016] After adopting the above technical solution, compared with the prior art, the following beneficial effects are achieved:

[0017] 1. By detecting in real time the high-voltage output state and high-voltage feedback state on the data communication board connected to the pre-charge circuit, real-time protection of the high voltage can be achieved; for the case of illegal power-off, when the system is restarted, the high-voltage output on the data communication board is first turned off to avoid the pre-charge circuit of the high voltage from being subjected to an instantaneous large current impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a circuit schematic diagram of the pre-charge circuit of the CT machine provided by the present invention;

[0019] Figure 2 It is a current curve diagram of the pre-charge circuit with direct load addition after restarting after illegal power-off provided by the present invention;

[0020] Figure 3 It is a flowchart of a preferred embodiment of the high-voltage protection method for the pre-charge circuit provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The advantages of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0022] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0023] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "the" and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0026] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a mechanical connection or an electrical connection, or it may be the communication inside two elements. It may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] In the subsequent description, the use of suffixes such as "module", "component", or "unit" for indicating elements is only for the convenience of the description of the present invention, and it has no specific meaning itself. Therefore, "module" and "component" can be used interchangeably.

[0028] See the attached Figure 1 , 2 , when the CT machine system is illegally powered off (here, the illegal power-off usually refers to the abnormal power-off of the device, that is, it is not the normal power-off process of the operator for the device, such as the device power-off caused by a sudden power failure, or the abnormal forced shutdown of the device), there is no 380V high voltage input to the CT machine, and the capacitor at the back end of the rectifier in the high-voltage pre-charge circuit discharges rapidly. At this time, if the 380V contactor is directly closed, the loads at the back end of the relay circuit are all loaded on the bus voltage, making the transient current of the pre-charge circuit very large. The current curve of the pre-charge circuit with direct load addition is as Figure 2 shown, and its value is much larger than the current value of the fuse, then the F3 and F4 fuses will be burned out.

[0029] The present invention provides a high-voltage protection method for a pre-charge circuit for a CT machine. When restarting the CT machine after power-off, the restart process includes the following steps:

[0030] The host computer reads in real time the high-voltage output status and high-voltage feedback status on the data communication board connected to the pre-charging circuit;

[0031] When it reads that there is a high-voltage output on the data communication board but no high-voltage feedback is detected, the host computer controls to first turn off the high-voltage output on the data communication board, and then turn on the high-voltage output on the data communication board to perform subsequent restart steps.

[0032] Specifically, reading that there is a high-voltage output on the data communication board but no high-voltage feedback is detected means that: the high-voltage contactor, anode rotary switch, and filament current switch used to control the high voltage on the data communication board are all in the on state, but no high-voltage contactor signal, anode rotary switch signal, or filament current switch signal is detected.

[0033] To ensure electrical safety, the host computer controls to turn off the high-voltage output on the data communication board, including: first turning off the filament current switch, then turning off the anode rotary switch, and finally turning off the high-voltage contactor.

[0034] Similarly, to ensure electrical safety, the host computer controls to turn on the high-voltage output on the data communication board, including: first turning on the high-voltage contactor, then turning on the anode rotary switch, and finally turning on the filament current switch.

[0035] The host computer actively performs high-voltage protection by reading in real time the high-voltage controller register of the data communication board and the status of the high-voltage feedback. At the same time, for the case of illegal power-off, during the restart process by the operator, the host computer first queries the high-voltage output status and high-voltage feedback status of the data communication board. When it reads that the high-voltage contactor signal, anode rotary switch signal, and filament switch signal for controlling the high voltage at the output end of the data communication board are all in the on state after restart, but there is no high-voltage signal feedback, the host computer first turns off the output signal of the data communication board, and then re-supplies 380V power, so as to prevent the data communication board from being damaged by the impact current.

[0036] A preferred embodiment, see attached Figure 3 , the subsequent restart steps after the host computer controls to turn on the high-voltage output on the data communication board include:

[0037] When the host computer detects the system restart process, it first reads the input / output interface status of the high-voltage output and the high-voltage feedback status of the data communication board. When the host computer detects that there is a high-voltage output on the data communication board (that is, the high-voltage contactor, anode rotary switch, and filament current switch used to control the high voltage on the data communication board are all in the on state), it enters the high-voltage shutdown process, first turns off the filament current switch, then turns off the anode rotary switch, and finally turns off the high-voltage contactor switch;

[0038] Subsequently, the host computer allows the 380V high-voltage input switch to be turned on, the high voltage resumes 380V power supply, and the system enters the initialization high-voltage process. First, the high-voltage contactor is energized. When the bus voltage is detected to reach the set value, the rotating anode is then turned on. After detecting that the anode rotation is stable, the filament current switch is turned on. If any error is detected during this process, the host computer returns to the initialization state and prompts an error message.

[0039] The above-mentioned initialization high-voltage process specifically includes:

[0040] First, turn on the high-voltage contactor, and the host computer reads the bus voltage of the pre-charge circuit;

[0041] If the bus voltage is within the first preset range, turn on the anode rotation switch; and the host computer reads the anode rotation signal;

[0042] If the bus voltage is not within the first preset range, interrupt the restart process and send a prompt signal;

[0043] If the anode rotation signal is within the second preset range, turn on the filament current switch; and the host computer reads the filament current signal;

[0044] If the anode rotation signal is not within the second preset range, interrupt the restart process and send a prompt signal;

[0045] If the filament current signal is within the third preset range, perform subsequent restart steps;

[0046] If the filament current signal is not within the third preset range, interrupt the restart process and send a prompt signal.

[0047] Thus, a safe restart process and high-voltage protection are achieved.

[0048] Preferably, the data communication board is a ceramic-based copper-clad laminate. In other embodiments, data communication boards made of other materials can also be selected.

[0049] Preferably, when high-voltage output exists on the data communication board but no high-voltage feedback is detected, the host computer controls to first turn off the high-voltage output on the data communication board; then the host computer reads the high-voltage output state and high-voltage feedback state on the data communication board. When it is read that there is no high-voltage output and no high-voltage feedback on the data communication board, the high-voltage output on the data communication board is turned on again to perform subsequent restart steps.

[0050] That is, after turning off the high-voltage output on the data communication board, first detect whether there is no high-voltage output and no high-voltage feedback on the data communication board. After confirmation, turn on the high-voltage output on the data communication board to perform subsequent restart steps, rather than directly restoring the high-voltage output after turning off the high-voltage output on the data communication board, so as to ensure the safety of system restart.

[0051] The present invention also discloses a high-voltage protection system for a pre-charge circuit, which is used for a CT machine and includes a host computer and a data communication board. The host computer is connected to the pre-charge circuit through the data communication board. For the restart process after the CT machine is powered off, the restart process includes the following steps:

[0052] The host computer reads the high-voltage output status and high-voltage feedback status on the data communication board in real time.

[0053] When it is read that the high-voltage contactor, anode rotation switch, and filament current switch for controlling the high voltage on the data communication board are all in the on state, but the high-voltage contactor signal, anode rotation switch signal, and filament current switch signal are not detected, the host computer controls to first turn off the high-voltage output on the data communication board, and then turn on the high-voltage output on the data communication board to perform subsequent restart steps.

[0054] The present invention also discloses a computer-readable storage medium, on which a computer program is stored, and the steps of a high-voltage protection method implemented when the computer program is executed by a processor.

[0055] It should be noted that the embodiments of the present invention have better implementability and are not any form of limitation to the present invention. Any person skilled in the art may use the disclosed technical content to change or modify it into an equivalent effective embodiment. However, as long as it does not depart from the technical content of the technical solution of the present invention, any modification, equivalent change, or modification made to the above embodiments according to the technical essence of the present invention still belongs to the scope of the technical solution of the present invention.

Claims

1. A high voltage protection method for a pre-charge circuit, characterized in that, For a CT scanner, during the restart process after power-off of the CT scanner, the restart process includes the following steps: The host computer reads in real time the high-voltage output status and high-voltage feedback status on the data communication board connected to the pre-charge circuit; When it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected, the host computer controls to first turn off the high-voltage output on the data communication board and then turn on the high-voltage output on the data communication board to perform subsequent restart steps; The situation where it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected includes: It is read that the high-voltage contactor, anode rotation switch, and filament current switch for controlling high voltage on the data communication board are all in the on state, but no high-voltage contactor signal, anode rotation switch signal, or filament current switch signal is detected; The host computer controls to turn on the high-voltage output on the data communication board includes: First turn on the high-voltage contactor, then turn on the anode rotation switch, and finally turn on the filament current switch; The host computer controls to turn on the high-voltage output on the data communication board to perform subsequent restart steps includes: First turn on the high-voltage contactor, and the host computer reads the bus voltage of the pre-charge circuit; If the bus voltage is within the first preset range, turn on the anode rotation switch; and the host computer reads the anode rotation signal of the anode rotation switch; If the bus voltage is not within the first preset range, interrupt the restart process and issue a prompt signal; If the anode rotation signal is within the second preset range, turn on the filament current switch; and the host computer reads the filament current signal of the filament current switch; If the anode rotation signal is not within the second preset range, interrupt the restart process and issue a prompt signal; If the filament current signal is within the third preset range, perform the subsequent restart steps; If the filament current signal is not within the third preset range, interrupt the restart process and issue a prompt signal.

2. The high-voltage protection method according to claim 1, characterized in that, The host computer controls to first turn off the high-voltage output on the data communication board includes: First turn off the filament current switch, then turn off the anode rotation switch, and finally turn off the high-voltage contactor.

3. The high-voltage protection method according to claim 1, wherein The data communication board is a ceramic-based copper clad laminate.

4. The high-voltage protection method according to claim 1, wherein The high voltage is 380V, and the data communication board is powered separately by 220V current.

5. The high-voltage protection method according to claim 1, characterized in that, When it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected, the host computer controls to first turn off the high-voltage output on the data communication board and then turn on the high-voltage output on the data communication board to perform subsequent restart steps includes: When it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected, the host computer controls to first turn off the high-voltage output on the data communication board; Then the host computer reads the high-voltage output status and high-voltage feedback status on the data communication board. When it is read that there is no high-voltage output on the data communication board and no high-voltage feedback is detected, turn on the high-voltage output on the data communication board to perform the subsequent restart steps.

6. A high-voltage protection system for a pre-charge circuit, characterized in that, For a CT scanner, which includes a host computer and a data communication board, the host computer is connected to the pre-charge circuit through the data communication board; For the restart process of the CT scanner after power-off, the restart process includes the following steps: The host computer reads the high-voltage output status and high-voltage feedback status on the data communication board in real time; When it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected, the host computer controls to first turn off the high-voltage output on the data communication board, and then turn on the high-voltage output on the data communication board to perform subsequent restart steps; The situation where it is read that there is a high-voltage output on the data communication board but no high-voltage feedback is detected includes: It is read that the high-voltage contactor, anode rotation switch, and filament current switch for controlling the high voltage on the data communication board are all in the on state, but no high-voltage contactor signal, anode rotation switch signal, and filament current switch signal are detected; The host computer controls to turn on the high-voltage output on the data communication board includes: First turn on the high-voltage contactor, then turn on the anode rotation switch, and finally turn on the filament current switch; The host computer controls to turn on the high-voltage output on the data communication board to perform subsequent restart steps includes: First turn on the high-voltage contactor, and the host computer reads the bus voltage of the pre-charge circuit; If the bus voltage is within the first preset range, then turn on the anode rotation switch; and the host computer reads the anode rotation signal of the anode rotation switch; If the bus voltage is not within the first preset range, then interrupt the restart process and issue a prompt signal; If the anode rotation signal is within the second preset range, then turn on the filament current switch; and the host computer reads the filament current signal of the filament current switch; If the anode rotation signal is not within the second preset range, then interrupt the restart process and issue a prompt signal; If the filament current signal is within the third preset range, then perform the subsequent restart steps; If the filament current signal is not within the third preset range, then interrupt the restart process and issue a prompt signal.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the high-voltage protection method described in any one of claims 1-5.

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