Micro-focus X-ray source

Abstract

The utility model provides a micro-focus X-ray source, and belongs to the technical field of X-ray sources. A microfocus X-ray source comprises an X-ray source body and a digital control high-voltage power supply, the digital control high-voltage power supply is installed in the X-ray source body, and the digital control high-voltage power supply comprises a DC power supply, an EMC filter, a main power circuit, a sampling circuit, an MCU control circuit and an upper computer; the DC power supply is connected with the EMC filter and is used for transmitting electricity to the main power circuit, the EMC filter is connected with the main power circuit, the main power circuit is connected with the sampling circuit, the sampling circuit is communicated with the MCU control circuit, the MCU control circuit is connected with the driving circuit, the driving circuit is connected with the main power circuit, and the driving circuit is connected with the main power circuit. And the controller is used for judging whether a fault state exists, judging a fault priority and outputting a protection control signal. The utility model has the advantage that the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of X-ray sources, in particular to a micro-focus X-ray source. Background Art

[0002] X-ray sources can be used for non-destructive testing of the interior of an object and are widely used in various fields such as medical treatment, security inspection, and industrial flaw detection. Digital power supply technology was proposed to overcome the complexity of modern power supplies. Its main features include the combination of digital and analog technologies, strong adaptability and flexibility, and the ability to directly monitor, process and adapt to system conditions, and can meet almost any power supply requirements. Existing power supplies are generally controlled by analog circuits, and the control circuit steps of analog circuits are relatively complex, and the required device cost is relatively high. Summary of the invention

[0003] The utility model aims to solve the above problems in the prior art and proposes a micro-focus X-ray source, which has the advantage of reducing costs.

[0004] The purpose of the utility model can be achieved by the following technical solutions: a micro-focus X-ray source, including an X-ray source body and a digitally controlled high-voltage power supply, the X-ray source body is equipped with a digitally controlled high-voltage power supply, the digitally controlled high-voltage power supply includes a DC power supply, an EMC filter, a main power circuit, a sampling circuit, an MCU control circuit and a host computer;

[0005] The DC power supply is connected to the EMC filter for transmitting electricity to the main power circuit, the EMC filter is connected to the main power circuit, the main power circuit is connected to the sampling circuit, the sampling circuit is connected to the MCU control circuit, the MCU control circuit is connected to the drive circuit, the drive circuit is connected to the main power circuit, and is used to determine whether there is a fault state and determine the fault priority and output a protection control signal;

[0006] The MCU control circuit is also connected to the host computer.

[0007] Preferably, the DC power supply is connected to an auxiliary power supply after EMC filtering, and the auxiliary power supply is connected to the MCU control circuit for powering the MCU control circuit.

[0008] Preferably, the main power circuit further includes a main power conversion circuit and a voltage doubler rectification and filtering circuit, the drive circuit is connected to the main power conversion circuit, and the main power conversion circuit is connected to the voltage doubler rectification and filtering circuit.

[0009] Preferably, the main power conversion circuit includes a switching conversion circuit and a switching transformer.

[0010] Preferably, the sampling circuit is used to sample parameters such as voltage, current, and arc.

[0011] Compared with the prior art, the advantages of the utility model are: 1. Strong integration, saving analog devices and reducing costs;

[0012] 2. Digital control, strong anti-interference ability, improved reliability;

[0013] 3. Control parameters are easy to adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the X-ray source main body and the digital control high voltage circuit in the utility model.

[0015] Figure 2 It is a structural frame diagram of the utility model.

[0016] In the figure, 2, X-ray source body; 3, digitally controlled high-voltage power supply; 31, DC power supply; 32, EMC filtering; 33, main power circuit; 331, main power conversion circuit; 332, voltage doubling rectifier filtering circuit; 34, sampling circuit; 4, MCU control circuit; 5, host computer; 6, auxiliary power supply; 7, drive circuit. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figure 1 to Figure 2 As shown, a micro-focus X-ray source includes an X-ray source body 2 and a digitally controlled high-voltage power supply 3. The digitally controlled high-voltage power supply 3 is installed in the X-ray source body 2, and the digitally controlled high-voltage power supply 3 includes a DC power supply 31, an EMC filter 32, a main power circuit 33, a sampling circuit 34, an MCU control circuit 4 and a host computer 5; the DC power supply 31 is connected to the EMC filter 32 for transmitting electricity to the main power circuit 33, the EMC filter 32 is connected to the main power circuit 33, the main power circuit 33 is connected to the sampling circuit 34, the sampling circuit 34 is connected to the MCU control circuit 4, the MCU control circuit 4 is connected to the drive circuit 7, and the drive circuit 7 is connected to the main power circuit 33 for judging whether there is a fault state and judging the fault priority and outputting a protection control signal; the MCU control circuit 4 is also connected to the host computer 5.

[0019] In the present invention, the DC power supply 31, the EMC filter 32, the main power circuit 33, the sampling circuit 34, the MCU control circuit 4 and the host computer 5 are all prior arts.

[0020] With the above structure, the DC power supply 31 is input through the EMC filter 32 circuit and then supplies power to the main power circuit 33. The main power conversion circuit 331 converts the DC power supply 31 into a square wave signal, and samples the voltage, current, arc and other parameters through the sampling circuit 34 for feedback and protection. The MCU control circuit 4 processes and calculates the sampled signal, outputs a suitable drive signal to control the main power circuit 33 through the drive circuit 7, determines whether there is a fault state and the fault priority, and outputs a protection control signal, and communicates with the host computer 5 at the same time. The MCU control circuit 4 is used to replace the analog circuit for control through the high-voltage power supply, adjust the high-voltage output, monitor the circuit parameters, and perform protection control on abnormal conditions, which is conducive to stronger integration, saving analog devices, and reducing the cost of the device; at the same time, the control parameters are easy to adjust. The digital control high-voltage power supply 3 has strong anti-interference ability, improves reliability, and can provide better compensation (better calling poles and zeros) than the analog circuit control scheme, so the control on stability is much better. In addition, the compensation can change with the change of conditions, so that the system can achieve the best stability under a wide range of conditions. While analog controllers have fixed compensation, digital control can provide adjustable or even adaptive compensation.

[0021] Specifically, if Figure 1 to Figure 2 As shown, the DC power supply 31 is connected to an auxiliary power supply 6 after passing through the EMC filter 32 , and the auxiliary power supply 6 is connected to the MCU control circuit 4 for supplying power to the MCU control circuit 4 .

[0022] With the above structure, it is advantageous to simultaneously power the main power circuit 33 and the MCU control circuit 4 through the DC power supply 31 via the auxiliary power supply 6 .

[0023] like Figure 1 to Figure 2 As shown, the main power circuit 33 also includes a main power conversion circuit 331 and a voltage doubler rectifier filter circuit 332. The drive circuit 7 is connected to the main power conversion circuit 331, and the main power conversion circuit 331 is connected to the voltage rectifier filter circuit. The switching transformer is conducive to the transmission of square wave signals to the secondary and provides sufficient insulation isolation. The voltage doubler rectifier filter circuit 332 is conducive to doubling the transformer secondary voltage to the required high voltage output.

[0024] In the present utility model, the main power conversion circuit 331 and the voltage doubler rectifier filter circuit 332 are prior arts.

[0025] like Figure 1 to Figure 2As shown, the main power conversion circuit 331 includes a switching conversion circuit and a switching transformer. The switching conversion circuit is conducive to converting the DC power supply 31 into a square wave signal.

[0026] In the utility model, the switch conversion circuit and the switch transformer are prior arts.

[0027] like Figure 1 to Figure 2 As shown, the sampling circuit 34 is used to sample parameters such as voltage, current, arc, etc. This is beneficial to improve reliability and monitor subsequent circuit parameters.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A microfocus X-ray source, characterized in that: The device comprises an X-ray source body (2) and a digitally controlled high-voltage power supply (3), wherein the X-ray source body (2) is provided with the digitally controlled high-voltage power supply (3), and the digitally controlled high-voltage power supply (3) comprises a DC power supply (31), an EMC filter (32), a main power circuit (33), a sampling circuit (34), an MCU control circuit (4), and a host computer (5); The DC power supply (31) is connected to the EMC filter (32) for transmitting electricity to the main power circuit (33); the EMC filter (32) is connected to the main power circuit (33); the main power circuit (33) is connected to the sampling circuit (34); the sampling circuit (34) is connected to the MCU control circuit (4); the MCU control circuit (4) is connected to the drive circuit (7); the drive circuit (7) is connected to the main power circuit (33) for determining whether there is a fault state and determining the fault priority and outputting a protection control signal; The MCU control circuit (4) is also connected to the host computer (5).

2. A microfocus X-ray source according to claim 1, characterized in that: The DC power supply (31) is connected to an auxiliary power supply (6) after passing through the EMC filter (32); the auxiliary power supply (6) is connected to the MCU control circuit (4) and is used to supply power to the MCU control circuit (4).

3. A microfocus X-ray source according to claim 1, characterized in that: The main power circuit (33) further comprises a main power conversion circuit (331) and a voltage-doubling rectifier and filter circuit (332); the drive circuit (7) is connected to the main power conversion circuit (331); and the main power conversion circuit (331) is connected to the voltage-doubling rectifier and filter circuit.

4. A microfocus X-ray source according to claim 3, characterized in that: The main power conversion circuit (331) comprises a switching conversion circuit and a switching transformer.

5. The microfocus X-ray source according to claim 1, characterized in that: The sampling circuit (34) is used to sample the parameters of voltage, current and arc.

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