Medical X-ray machine paying-off control circuit and method

Abstract

The invention relates to a medical X-ray machine paying-off control circuit and method, and the circuit comprises a detection terminal which is used for detecting an opening signal or a closing signal corresponding to a switch part on an X-ray machine, and the switch part comprises a foot brake or a hand brake; the control circuit is connected with the detection terminal and is used for outputting a preparation signal when the detection terminal detects the opening signal and outputting a control signal based on a user input parameter; and the inverter is respectively connected with the control circuit and a bulb tube of the X-ray machine, and is used for starting to control the bulb tube to pay off to generate X-rays when receiving the preparation signal and the control signal output by the control circuit at the same time.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of X-ray machines, and in particular, to a wire release control circuit and method for a medical X-ray machine. Background Art

[0002] At present, the foot switch or hand switch of an X-ray machine is a switch designed for the convenience of operators during X-ray fluoroscopy of patients. When the foot switch or hand switch is subjected to a force such as the pressure of stepping on it or pressing force, a foot switch signal or a hand switch signal is generated to trigger the control circuit to work to generate X-rays. When the force disappears, the control circuit is triggered to stop generating X-rays.

[0003] In related technologies, when the foot switch signal or the hand switch signal triggers the control circuit to work, usually the control circuit outputs a control signal for controlling the dose size of the generated X-rays. This control signal can act on an inverter connected to the X-ray tube of the X-ray machine, and the inverter controls the X-ray tube to release wires to generate X-rays to irradiate the corresponding part of the human body for imaging. However, the inventor found that when controlling the X-ray machine to generate X-rays based on the control signal output by the foot switch signal or the hand switch signal, misoperations are likely to occur, resulting in poor stability and reliability of the generated X-rays. Summary of the Invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, embodiments of the present disclosure provide a wire release control circuit and method for a medical X-ray machine.

[0005] In a first aspect, an embodiment of the present disclosure provides a wire release control circuit for a medical X-ray machine, including:

[0006] A detection terminal for detecting an opening signal or a closing signal corresponding to a switch component on the X-ray machine, where the switch component includes a foot switch or a hand switch;

[0007] A control circuit connected to the detection terminal, configured to output a preparation signal when the detection terminal detects the opening signal, and simultaneously output a control signal based on user input parameters;

[0008] An inverter connected to the control circuit and the X-ray tube of the X-ray machine respectively, configured to start controlling the X-ray tube to release wires to generate X-rays when receiving the preparation signal and the control signal output by the control circuit simultaneously.

[0009] In one embodiment, the control circuit is further configured to output a periodic trigger signal, and after outputting the preparation signal when the detection terminal detects the opening signal, stop outputting the periodic trigger signal and change the periodic trigger signal to be synchronized with the period of the control signal.

[0010] In one embodiment, in one period of the control signal, the high level is maintained for a first duration, and the low level is maintained for a second duration, where the first duration is greater than the second duration;

[0011] In one period of the periodic trigger signal, the high level is maintained for a third duration, and the low level is maintained for a fourth duration, where the third duration is less than the fourth duration, and the third duration is less than the second duration, while the fourth duration is greater than the first duration.

[0012] In one embodiment, the first duration is 60 ms, the second duration is 40 ms, the third duration is 5 ms, and the fourth duration is 95 ms.

[0013] In one embodiment, the control signal includes a pulse control signal, and different user input parameters correspond to different control signals, and these different user input parameters correspond to different X-ray emission modes.

[0014] In one embodiment, the control circuit is further configured to transmit exposure indication information to a host computer, so that the host computer can obtain a collected image when the X-ray tube emits X-rays; when the shutdown signal is detected at the detection terminal, stop outputting the preparation signal to end the X-ray emission, and at the same time resume outputting the periodic trigger signal.

[0015] In one embodiment, the hand switch includes a first hand switch and a second hand switch; the control circuit is further configured to output a preparation signal when the opening signal of the first hand switch is detected at the detection terminal, and after waiting for a preset duration, output a control signal when the opening signal of the second hand switch is detected at the detection terminal, and at this time trigger the inverter to start controlling the X-ray tube to emit X-rays; where the preset duration at least includes the duration of the X-ray tube preheating.

[0016] In one embodiment, the control circuit is further configured to stop outputting the control signal when the closing signal of the second hand switch is detected at the detection terminal, and stop outputting the preparation signal when the closing signal of the first hand switch is detected at the detection terminal, and resume outputting the periodic trigger signal.

[0017] In a second aspect, an embodiment of the present disclosure provides a method for controlling the X-ray emission of a medical X-ray machine, and the method includes:

[0018] The detection terminal detects an opening signal or a closing signal corresponding to a switch component on the X-ray machine, and the switch component includes a foot switch or a hand switch;

[0019] When the detection terminal detects the opening signal, the control circuit outputs a preparation signal and simultaneously outputs a control signal based on user input parameters;

[0020] The inverter starts to control the tube to unwind and generate X-rays when it receives both the preliminary signal and the control signal output by the control circuit; wherein the inverter is respectively connected to the control circuit and the tube of the X-ray machine.

[0021] In one embodiment, the method further includes:

[0022] The control circuit outputs a periodic trigger signal, and after the detection terminal detects the start signal and outputs the preliminary signal, it stops outputting the periodic trigger signal and changes the periodic trigger signal to be synchronized with the period of the control signal.

[0023] The technical solution provided by the embodiments of the present disclosure has the following advantages compared with the prior art:

[0024] The wire unwinding control circuit and method for a medical X-ray machine provided by the embodiments of the present disclosure, the detection terminal detects the start signal or the stop signal corresponding to the switch component on the X-ray machine, and the switch component includes a foot switch or a hand switch; the control circuit outputs a preliminary signal when the detection terminal detects the start signal, and at the same time outputs a control signal based on user input parameters; the inverter starts to control the tube to unwind and generate X-rays when it receives both the preliminary signal and the control signal output by the control circuit. In this way, the solution of this embodiment no longer simply relies on the control signal to control and drive the tube to unwind the inverter, but simultaneously controls and drives the inverter to unwind the tube based on the timing logic of the control signal and the preliminary signal generated by pressing the foot switch or the hand switch, avoiding possible misoperations and improving the stability and reliability of the X-ray machine to generate X-rays. Description of the Drawings

[0025] The drawings here are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0026] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a block diagram of the wire unwinding control circuit for a medical X-ray machine according to an embodiment of the present disclosure;

[0028] Figure 2 It is a control timing logic diagram according to an embodiment of the present disclosure;

[0029] Figure 3 It is a control timing logic diagram according to another embodiment of the present disclosure;

[0030] Figure 4 This is a flowchart of the wire release control method for a medical X-ray machine according to an embodiment of the present disclosure. Specific embodiments

[0031] In order to more clearly understand the above-mentioned objects, features, and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0032] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0033] It should be understood that in the following text, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" may mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B may be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (one) of the following" or its similar expression means any combination of these items, including any combination of single item (one) or plural items (ones). For example, at least one (one) of a, b, or c may mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c may be single or multiple.

[0034] Figure 1 This is a block diagram of a wire release control circuit for a medical X-ray machine provided by an embodiment of the present disclosure. The wire release control circuit may include a detection terminal, a control circuit, and an inverter, which will be specifically described one by one below.

[0035] The detection terminal is used to detect the opening signal or closing signal corresponding to the switch component on the X-ray machine, and the switch component includes a foot switch or a hand switch.

[0036] It can be understood that the specific structure and principle of the foot switch or the hand switch can be understood with reference to the prior art. When it is pressed or stepped on, it can output, for example, a high-level signal, that is, an opening signal, and when the hand switch or the foot switch is released, it can output a low-level signal, that is, a closing signal. The opening signal or closing signal corresponding to the switch component such as the foot switch or the hand switch can be detected by the detection terminal.

[0037] The control circuit is connected to the detection terminal. The control circuit is configured to output a preparation signal when the detection terminal detects the opening signal, and at the same time output a control signal based on user input parameters.

[0038] Exemplarily, the detection terminal can be a part of the control circuit and integrated in the control circuit, but is not limited thereto. In this embodiment, by way of example, the control circuit can be an existing microprocessor or microcontroller, and the detection terminal can be a port in the microprocessor or microcontroller. For example, when the port receives a high-level signal, it triggers the microprocessor to output a preparation signal pre. Refer to Figure 2 As shown, the preparation signal pre starts before wire feeding and stops after wire feeding ends. That is, when the foot brake or the preparation hand brake is pressed, the preparation signal pre can be turned on to control the inverter to perform the preparatory work before wire feeding. When the subsequent foot brake is released and all data transmission is completed, the preparation signal pre can be turned off.

[0039] The user input parameters can be based on input devices such as keyboards or touchscreens and other display devices, but are not limited thereto. The user input parameters can be various existing parameters used to control the dose size of X-rays. The control circuit outputs a corresponding control signal (com signal) such as a pulse control signal based on the user input parameters. The com signal is usually a periodic signal. Different wire feeding modes correspond to different user input parameters, and thus correspond to different com signals for wire feeding. Different com signals can have different voltage magnitudes, different duty cycles, etc.

[0040] The wire feeding modes controlled by the foot brake include but are not limited to: automatic fluoroscopy; automatic half-dose; automatic enhancement; manual fluoroscopy; manual half-dose; manual enhancement; pulse fluoroscopy, etc. In these wire feeding modes, pressing the foot brake can perform the wire feeding operation.

[0041] The inverter is respectively connected to the control circuit and the X-ray tube of the X-ray machine, and is configured to start controlling the X-ray tube to emit X-rays by wire feeding when receiving the preparation signal and the control signal output by the control circuit at the same time.

[0042] In this embodiment, the inverter is improved at the same time. It is not controlled by one signal, but two signals. That is to say, the X-ray tube will only emit X-rays when it receives the pre signal and the com signal. If only one of the signals is received, the machine will not emit X-rays. When there is a com signal, there must be a pre signal, otherwise the inverter will not work for wire feeding. At least during the process from the start to the end of wire feeding, the pre signal remains high level. In other embodiments, the pre signal can remain high level for a certain period of time from before the start to after the end of wire feeding.

[0043] The above scheme of this embodiment no longer relies solely on the control signal to control the inverter to drive the tube to release the line, but simultaneously controls the inverter to drive the tube to release the line based on the timing logic of the control signal and the preparatory signal triggered by pressing the foot switch or the hand switch, thereby avoiding possible misoperation and improving the stability and reliability of the X-ray machine to generate X-rays.

[0044] In one embodiment, the control circuit is also used to output a periodic trigger signal, and after the detection terminal detects the start signal and outputs the preparatory signal, the control circuit stops outputting the periodic trigger signal and changes the periodic trigger signal to be synchronized with the period of the control signal.

[0045] In this embodiment, a third signal, namely a periodic trigger signal, is further added. Based on the signal period and timing logic synthesis of the trigger signal, the preparatory signal and the control signal, the tube is controlled to generate X-rays. This can more stably and reliably control the X-ray machine to generate X-rays, avoid misoperation, and further improve the stability and reliability of the X-ray machine to generate X-rays.

[0046] For example, the trigger signal is related to the communication with the host computer, and its period is 100ms when the line is not released, wherein the duration of the high level is shorter than the duration of the low level. When the line is released, the trigger signal is synchronized with the com signal.

[0047] In one embodiment, the control signal maintains a high level for a first duration in one cycle, and a low level for a second duration, and the first duration is greater than the second duration; the periodic trigger signal maintains a high level for a third duration in one cycle, and a low level for a fourth duration, and the third duration is less than the fourth duration, and the third duration is less than the second duration, and the fourth duration is greater than the first duration. In this way, the trigger signal is synchronized with the com signal, that is, when the com signal is at a high level in each cycle, there is a trigger signal accompanying it, such as the 5ms high level partial trigger signal below, reference Figure 3 The trigger signal in the middle and the pulse control signal in the middle. This makes the rising edge of the com signal suddenly smaller, thereby improving the accuracy of the line control of the X-ray machine.

[0048] As an example, in one embodiment, the first duration is 60 ms, the second duration is 40 ms, the third duration is 5 ms, and the fourth duration is 95 ms. This is only an example and is not limited thereto.

[0049] In a specific embodiment, the com signal is usually a periodic signal with a period of 100ms, a high level maintained for 60ms, and a low level maintained for 40ms. When the com signal is stopped, if the com signal is at a high level at this time, the high level of the com signal must last for 60ms before it can be stopped.

[0050] When the trigger signal does not release the line, its cycle is 100ms, of which the high level is maintained for 5ms and the low level is maintained for 95ms. When releasing the line, the trigger signal is synchronized with the com signal. The trigger signal is high for the first 5ms and low for the next 95ms. When the foot switch is not pressed, the trigger signal keeps releasing the line periodically. After the foot switch is pressed, the periodic trigger signal is stopped. The trigger signal is synchronized with the com signal, that is, when the com signal is at a high level in each cycle, there is a trigger signal accompanying its rise, that is, a partial trigger signal of a 5ms high level. After the foot switch is released: the periodic release of the line begins to resume. When stopping the trigger signal, ensure that the high level of the trigger signal is completed. In this way, the rising edge of the com signal becomes smaller suddenly, thereby improving the accuracy of the release control of the X-ray machine.

[0051] In one embodiment, the control circuit is also used to transmit exposure indication information to a host computer so that the host computer can obtain a captured image when the tube generates X-rays during release; when the detection terminal detects the shutdown signal, it stops outputting a preparatory signal to end the release, and resumes outputting a periodic trigger signal.

[0052] For example, after pressing the foot switch, the control circuit can notify the tube to start paying out the line, and can transmit exposure instruction information such as exposure instructions to the host computer through serial communication. After receiving the exposure instruction, the host computer displays the acquired image on the acquisition interface. When the foot switch is released, the paying out ends, and the control circuit stops outputting the preparation signal to end the paying out, and resumes outputting the periodic trigger signal.

[0053] Combine the following Figure 3 A specific embodiment is shown to illustrate the foot brake release timing, that is, the control process.

[0054] 1. Press the foot switch to start the line release sequence:

[0055] (1) First, turn on the preparation signal

[0056] (2) Stop the periodic trigger signal

[0057] (3) Send data to computer PC 01

[0058] (4) 250ms compensation time

[0059] When the compensation reaches 200ms, data 02 and data 03 are sent to the PC, and then continue until 250ms

[0060] (5) Start paying out the wire after compensation

[0061] If it is automatic mode, only one frame is played; if it is manual mode, the line is played according to the cycle, that is, the pulse signal is controlled to play according to the set frame rate. At this time, the exposure indicator light can be turned on.

[0062] 2. Foot brake release switch closing wire release timing sequence:

[0063] (1) Foot brake release switch closes to release wire

[0064] (2) Immediately send multiple data and parameters related to wire release to the PC

[0065] (3) After sending the stop preparation signal

[0066] (4) Turn on the periodic trigger signal

[0067] (5) Turn off the preparation signal.

[0068] In one embodiment, the hand brake includes a first hand brake and a second hand brake; the control circuit is further configured to output a preparation signal when the detection terminal detects the opening signal of the first hand brake, and after waiting for a preset duration, output a control signal when the detection terminal detects the opening signal of the second hand brake. At this time, trigger the inverter to start controlling the tube to release wire to generate X-rays; wherein the preset duration at least includes the duration of tube preheating.

[0069] In one embodiment, the control circuit is further configured to stop outputting the control signal when the detection terminal detects the closing signal of the second hand brake, and stop outputting the preparation signal when the detection terminal detects the closing signal of the first hand brake, and resume outputting the periodic trigger signal.

[0070] Exemplarily, the hand brake wire release is divided into two gears: pressing the hand brake 1 is for preparation, and after the preparation is completed, pressing the hand brake 2 can start wire release. After pressing the hand brake 1 switch, the control circuit outputs a preparation signal to the tube to start preparation, and can send the preparation instruction to the upper computer through serial communication. After pressing the hand brake 2 switch, the control circuit notifies the tube to release wire, and can send the exposure instruction to the upper computer through serial communication. After receiving the exposure instruction, the upper computer displays the acquired image on the acquisition interface.

[0071] The wire release modes controlled by the hand brake are: digital photography and nominal power. In the digital photography and nominal power modes, as shown in Figure 2 , two hand brakes can be used to control the preparation signal pre, trigger signal, and com signal to perform wire release operations:

[0072] 1. When the hand brake 1 is pressed, the trigger signal stops and the preparation signal starts

[0073] Send data, and the tube starts to preheat for 2s (preparation time 2s);

[0074] 2. After the preparation time of 2s, send an indication message indicating that wire release is possible;

[0075] 3. There will be a 4s waiting time afterwards; during this period, the hand brake 2 can be pressed to send a signal to start wire release.

[0076] 4. During wire release, the com signal is always high level. After the arrival time (1s for digital photography, nominal power is 100ms), wire release stops; an indication message is sent to indicate that wire release has stopped.

[0077] 5. Release the hand brake 2 and send relevant data

[0078] 6. Release the hand brake 1 and send another relevant data and parameters

[0079] Turn off the preparatory signal

[0080] Turn on the periodic trigger signal.

[0081] In the above process, the following two points can be noted:

[0082] 1. When the hand brake 1 (preparatory) is pressed, time for 2s; if the hand brake 2 (hand brake wire release) is pressed within 2s, control the buzzer to send a warning message and send a notification message to indicate improper operation and that wire release needs to be redone.

[0083] 2. If after the hand brake 1 (preparatory) is pressed for 2s, time for 4s, and the hand brake 2 (hand brake wire release) can be pressed within 4s; when the time exceeds 4s, send a notification message to indicate improper operation and that wire release needs to be redone.

[0084] It should be noted that although several modules or units of the devices for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of the two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units. The components shown as modules or units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of the present disclosure. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0085] As Figure 4 shown, the embodiments of the present disclosure provide a method for controlling wire release of a medical X-ray machine, and the method may include the following steps:

[0086] Step S401: The detection terminal detects the opening signal or closing signal corresponding to the switch component on the X-ray machine, and the switch component includes a foot brake or a hand brake;

[0087] Step S402: When the control circuit detects the start signal at the detection terminal, it outputs a preparation signal and simultaneously outputs a control signal based on user input parameters;

[0088] Step S403: When the inverter receives both the preparation signal and the control signal output by the control circuit simultaneously, it starts to control the tube to unwind and generate X-rays. The inverter is respectively connected to the control circuit and the tube of the X-ray machine.

[0089] In one embodiment, the method may further include the following steps:

[0090] The control circuit outputs a periodic trigger signal, and after detecting the start signal at the detection terminal and outputting the preparation signal, it stops outputting the periodic trigger signal and changes the periodic trigger signal to be synchronized with the period of the control signal.

[0091] In one embodiment, in one period of the control signal, the high level lasts for a first duration, and the low level lasts for a second duration, where the first duration is greater than the second duration; in one period of the periodic trigger signal, the high level lasts for a third duration, and the low level lasts for a fourth duration, where the third duration is less than the fourth duration, and the third duration is less than the second duration, while the fourth duration is greater than the first duration.

[0092] In one embodiment, the first duration is 60 ms, the second duration is 40 ms, the third duration is 5 ms, and the fourth duration is 95 ms.

[0093] In one embodiment, the control signal includes a pulse control signal, and different user input parameters correspond to different control signals, and these different user input parameters correspond to different X-ray unwinding modes.

[0094] In one embodiment, the control circuit transmits exposure indication information to the host computer so that the host computer can obtain an acquisition image when the tube unwinds to generate X-rays; when the detection terminal detects the stop signal, it stops outputting the preparation signal to end the unwinding, and at the same time resumes outputting the periodic trigger signal.

[0095] In one embodiment, the hand switch includes a first hand switch and a second hand switch; when the control circuit detects the start signal of the first hand switch at the detection terminal, it outputs a preparation signal, and after waiting for a preset duration, when the detection terminal detects the start signal of the second hand switch, it outputs a control signal, and at this time, it triggers the inverter to start controlling the tube to unwind and generate X-rays; the preset duration includes at least the duration of the tube preheating.

[0096] In one embodiment, when the control circuit detects a closing signal of the second handbrake at the detection terminal, it stops outputting the control signal, and when the detection terminal detects a closing signal of the first handbrake, it stops outputting the preparation signal and resumes outputting the periodic trigger signal.

[0097] Regarding the method in the above embodiment, the specific manner of performing operations for each step and the corresponding technical effects have been described in detail in the embodiment related to the control circuit, and will not be elaborated herein.

[0098] It should be noted that although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that these steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution, etc. Moreover, it is also easy to understand that these steps may be executed synchronously or asynchronously in, for example, multiple modules / processes / threads.

[0099] It should be noted that in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0100] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A medical X-ray machine release control circuit, characterized in that: Comprising: A detection terminal for detecting an on-signal or an off-signal corresponding to a switch component on an X-ray machine, wherein the switch component includes a foot switch or a hand switch; A control circuit connected to the detection terminal for outputting a preparation signal when the detection terminal detects the on-signal, and simultaneously outputting a control signal based on user input parameters; An inverter connected to the control circuit and the X-ray tube of the X-ray machine respectively, for starting to control the X-ray tube to unwind and generate X-rays when receiving both the preparation signal and the control signal output by the control circuit.

2. The wire pay-off control circuit according to claim 1, wherein The control circuit is further configured to output a periodic trigger signal, and after the detection terminal detects the on-signal and outputs the preparation signal, stop outputting the periodic trigger signal and change the periodic trigger signal to be synchronized with the period of the control signal.

3. The line release control circuit according to claim 2, characterized in that: In one period of the control signal, the high level is maintained for a first duration, and the low level is maintained for a second duration, where the first duration is greater than the second duration; In one period of the periodic trigger signal, the high level is maintained for a third duration, and the low level is maintained for a fourth duration, where the third duration is less than the fourth duration, the third duration is less than the second duration, and the fourth duration is greater than the first duration.

4. The wire pay-off control circuit according to claim 3, wherein, The first duration is 60 ms, the second duration is 40 ms, the third duration is 5 ms, and the fourth duration is 95 ms.

5. The unwinding control circuit according to any one of claims 1 to 4, characterized in that: The control signal includes a pulse control signal, and different user input parameters correspond to different control signals, and these different user input parameters correspond to different X-ray unwinding modes.

6. The unwinding control circuit according to any one of claims 2 to 4, characterized in that: The control circuit is further configured to transmit exposure indication information to a host computer, so that the host computer can obtain an acquisition image when the X-ray tube unwinds and generates X-rays; when the detection terminal detects the off-signal, stop outputting the preparation signal to end the unwinding, and at the same time resume outputting the periodic trigger signal.

7. The unwinding control circuit according to any one of claims 1 to 4, characterized in that: The hand switch includes a first hand switch and a second hand switch; The control circuit is further configured to output a preparation signal when the detection terminal detects the on-signal of the first hand switch, and after waiting for a preset duration, output a control signal when the detection terminal detects the on-signal of the second hand switch, and at this time trigger the inverter to start controlling the X-ray tube to unwind and generate X-rays; wherein the preset duration at least includes the duration of the X-ray tube preheating.

8. The wire pay-off control circuit according to claim 7, characterized in that, The control circuit is further configured to stop outputting the control signal when the detection terminal detects the off-signal of the second hand switch, and stop outputting the preparation signal and resume outputting the periodic trigger signal when the detection terminal detects the off-signal of the first hand switch.

9. A method for controlling the wire release of a medical X-ray machine, characterized in that, The method includes: The detection terminal detects an on-signal or an off-signal corresponding to a switch component on an X-ray machine, wherein the switch component includes a foot switch or a hand switch; The control circuit outputs a preparation signal when the detection terminal detects the on-signal, and simultaneously outputs a control signal based on user input parameters; The inverter starts to control the X-ray tube to unwind and generate X-rays when receiving both the preparation signal and the control signal output by the control circuit; wherein the inverter is connected to the control circuit and the X-ray tube of the X-ray machine respectively.

10. The method according to claim 9, wherein The method further includes: The control circuit outputs a periodic trigger signal, and after the detection terminal detects the start signal and outputs the preparation signal, it stops outputting the periodic trigger signal and changes the periodic trigger signal to be synchronized with the period of the control signal.

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